Concentration of nonferrous metal ores
SUBSTANCE: invention relates to concentration of minerals and can be used to increase the yield of valuable products, particularly, zinc and lead, by flotation. Proposed method comprises flotation, processing of pulp-bearing solution by pulse discharges and precipitation of solid phase. Processing of pulp-bearing solution is carried out by pulsed high-voltage discharges of specific energy of 8.6-11.2 kJ/dm3 fed directly into pipeline communicating flotation machine with settle-thickener. Action of pulsed high-voltage discharges is brought about provided that: R/Ro=10.4 where: R is the radius of efficient wave effects; Ro is the spacing between electrodes and R.
EFFECT: higher intensity and rate of deposition of disperse particles from foam after flotation.
2 cl, 3 dwg, 1 tbl
The invention relates to processes for ore minerals and can be used to increase the completeness of extraction of valuable products, in particular zinc and lead, by flotation.
A known method of cleaning and sterilization of liquid or gaseous media by treating them with a pulsed high voltage discharges, generating UV radiation (RF patent No. 2326820, C02F 1/467, 20.06.2008).
When the surface of the water jet moving high-voltage discharge narrowing stream into tiny droplets, the droplets of water and stream-water interface under the action of hard UV radiation generated in the active particles. Cleaning and sterilization of the processed media is the result of the combined effect of organic and biological pollutants, UV radiation and active radical particles. The direct effect of UV radiation leads to a rapid destruction of bacteria and viruses and causes the degradation of molecules of organic pollutants.
However, the performance when using this method is low because water is for cleaning a trickle. The hollow configuration of the electrodes creates a risk of clogging of the tube to form a thin water jet, which makes the used electrodes are unsuitable. In addition, the process requires additional equipment is equipment, that leads to an increase in capital expenditures.
Closest to the claimed technical solution to the technical essence and the achieved technical result is a method of enrichment of sulfide siderastrea ores (RF patent No. 2123885, WV 7/00, 27.12.1998). Pre-processing of sulphide siderastrea ores is carried out in the pulp by electrical explosion in energy density between 50 and 150 kJ/DM3. Then the pulp is subjected to magnetic separation and flotation. Under certain modes electroexplosive processing by a complex bit and PokerTracker phenomena siderite contained in the original ore, decomposes and turns into selfnominate form.
The described method is taken as a prototype of the invention.
The disadvantages of the prototype:
- high energy costs compared with the proposed method (50-150 kJ/DM3);
- the need for additional equipment in the form of a contact tank, where the electrode system and is blasting treatment;
- the need for additional security measures through the use of high energy impacts.
The technical task of the present invention is to increase the intensity and speed of sedimentation of dispersed particles of the foam after flotation machines and improving the quality of purified solution
This is achieved by the fact that in the proposed method, enrichment of ores of non-ferrous metals, including flotation, pre-processing pulpotomies solution of pulsed high voltage discharges and further sedimentation of the solid phase, according to the invention pre-processing pulpotomies solution is performed in a pulsed high-voltage discharge with a specific energy of 8.6-11.2 kJ/DM3served directly in the pipe connecting the flotation machine with a clarifier-thickener.
The influence of pulsed high-voltage discharge is executed under the condition
where R is the radius of the effective impact of the waves;
Ro- the distance between the electrodes and R.
When pulsed high-voltage discharge occurs directly in the pipeline connecting the flotation machine with a clarifier-thickener, without using any intermediate additional capacitances pin type Chan.
The essence of the proposed method consists in the following. In the flotation get concentrated product and pulpotomies solution. Then, the solution through the line enters the clarifier-thickener. Treatment of a solution of a pulsed high-voltage discharge occurs directly in the pipeline. This allows the process in ararauna hydrodynamic mode, unlike the prototype, where blasting treatment is carried out in a stationary mode, in the contact tank with an electrode system.
Generated pulsed high voltage discharges the wave front leads the processed medium in a complex stress state with the active participation of as waves of compression, depending on the energy parameters of the pulse and wave strain, which depends on the geometric characteristics of the site - the distance between the electrodes Roand the effective radius of influence of waves of R. By experiment it was proved that the radii are related by the ratio R/Ro=10,4. As can be seen from the graph shown in figure 1, the maximum pressure on the front of the direct wave (PM1the non-linear increases with increasing specific energy processing, and the maximum value of the pressure of the reflected wave (Rm2) stabilizes at energies of 8.6-11.2 kJ/DM3. The study of the influence of the density of the medium on the resulting pressure showed that increasing the density to ρ=1.26 g/cm3that corresponds to the density of the pulp T:W=1:3, there is an increase in pressure of the shock wave, and when the ratio R/Ro>10.4 pressure begins to fall, the coagulation of the dispersed particles is deteriorating.
Therefore, the practical use of shock waves in a pulsed high-voltage discharge is most effective when R/Ro/sub> =10,4. This allows to determine the optimal R.
Thus, in contrast to the method adopted for the prototype, it is possible to determine the optimal diameter of the pipeline taking into account the calculated effective radius of influence of shock waves, in which the blasting treatment will be carried out in the most effective manner.
When the ratio of T:W 1:3 the optimal distance R is 10-12,5 mm (figure 2). Therefore, the optimum diameter of the pipeline - 25 mm
The influence of pulsed high-voltage discharge significantly reduces the electrokinetic potential of the particles. This is crucial from the viewpoint of the coagulation of dispersed particles. From the diagram shown in figure 3, it is seen that the potential reaches the value (7-9 mV)is significantly less than the limit threshold coagulation (30 mV), which improves the coagulation of particles and their subsequent deposition. It was established experimentally that the most intensive coagulation and precipitation of particles was observed in the case of exposure to the solution before it is lightening pulsed high-voltage discharge with a specific energy of 8.6-11.2 kJ/DM3(table).
Thus, under these conditions, the electrokinetic potential of the particles due to the processing pulpotomies solution pulsed high voltage discharges in the specific energy of 8.6-11.2 kJ/DM3reaches led the ranks 7-9 mV, which leads to the acceleration of the process of sedimentation of dispersed particles.
At such energies processing the completeness of extraction of valuable components maximum, and product loss with the clarified solution is minimal.
An example implementation of the method.
The original sample contained, %: Pb - 4,07; Zn is 0.5; Cu - 0,17; Fe - 27,5; SiO2- 33,32; Al2O3- 2,96; CaO - 1,86; Mn - 1,66.
The required fineness of 75% of class 0,074 was achieved by grinding in a laboratory rod mill at a ratio of T:W:s=1:0,8:4,8.
The weight - 250, the grinding Time is 40 min flotation Time - 10 minutes
Mode flotation: soda (900 g/t, tto=1 min); sodium sulfide (30 g/t, tto=1 min); butyl xanthate (90 g/t, tto=2 min); pine oil (60 g/t, tto=1 min).
Flotation was carried out in a flotation machine 1 liter at a concentration of solids of 25%. The water temperature is 18°C.
Next pulpotomies the solution was subjected to processing by pulsed discharges energy from 3.4 to 16.5 kJ/DM3. The distance between the electrodes was 12.5 mm, While the categories were filed directly in the pipe connecting the flotation machine with a clarifier-thickener. The pipe diameter is 25 mm, Then the solution was sent to a clarifier-thickener, which made its separation into solid and liquid phases under the action of gravity, and determined the effectiveness of OTS is ivania. The results of the experiment are given in the table.
|The dependence of the content of the solid product in the clarified solution from the energy of the pulse high-voltage discharge|
|Specific discharge energy, kJ/DM3||0||3,4||6,0||8,6||9,2||11,2||the 13.4||16,5|
|The solids content of the product in the clarified solution, mg/DM3||35||8||5||0,9||1||4,6||10||15|
Experimental data show that the increase in pulse energy over 8.6-11.2 kJ/DM3leads to pereseleniu particles, deterioration in their aggregation and subsequent sedimentation. The influence of pulse energy, the smaller the 8.6-11.2 kJ/DM3not able to reduce the electrokinetic potential of the particles to below the limit threshold of coagulation. As can be seen from the table, the contents of the solid product in the solution is reduced from 35 g/l to 0.9 g/L. The efficiency of extraction of the solid phase from pulpotomies solution is thus 97,4%.
The advantages of the proposed method in comparison with prototype:
1) the Solution is treated at much lower specific energies (8,6 to 11.2 kJ/DM3), which reduces energy costs;
2) Reduction of specific energy processing reduces electrokinetic potential. As a result, the coagulation of the dispersed particles is improved. The solid content in the solution is reduced from 35 g/l to 0.9 g/L. the Efficiency of extraction of the solid phase from pulpotomies solution is 97,4%.
3) the Processing is carried out in a continuous hydrodynamic mode, unlike the prototype, where necessary the use of additional equipment;
4) the optimal ratio of the distance between the electrodes Roand the effective radius of influence of waves R: R/Ro=10,4, in which the use of shock waves in a pulsed electric discharge is most effective.
5) the Ability to determine the optimal diameter of the pipeline.
1. The way of dressing of non-ferrous metals, including flotation, pre-processing pulpotomies solution of pulsed high voltage discharges and further deposition, wherein pre-processing pulpos the holding solution is performed in a pulsed high-voltage discharge with a specific energy of 8.6-11.2 kJ/DM 3served directly in the pipe connecting the flotation machine with a clarifier-thickener.
2. The way of dressing of non-ferrous metals according to claim 1, characterized in that the pulsed high-voltage discharge is executed under the condition
where R is the radius of the effective impact of the waves;
Ro- the distance between the electrodes and R.
SUBSTANCE: method includes treatment of coal extracted from coal deposits for opening of its splices with rock. At the same time the coal is placed in layers at the intermediate storage, arranged on the southern slope of a knoll (mountain, hill) or a pit heap, the site of which has an angle of inclination 10-25°, exposed in spring-autumn periods to solar radiation with the number of "thawing-freezing" cycles with transition of temperature via 0°C equal to at least 7. Besides, the thickness of the coal layers is taken on the basis of the calculation sufficient for daily heating-cooling, and after thermal processing the coal is shipped from the warehouse for subsequent demineralisation.
EFFECT: increased opening of coal splices with rock.
FIELD: machine building.
SUBSTANCE: proposed machine comprises cylindrical housing, initial material feed pipe, material discharge pipe and rotor drive. Initial material distributor composed of fixed cone is arranged directly above the rotor. Circular flanges are arranged at housing sidewall while fine dusty fraction discharge pipe is arranged at housing top section. Rotor fitted on the shaft in said housing is shaped to cylinder in height equal to rub-off zone and equipped with radial blades. It includes industrial blower is communicated with pipe discharging the fine dusty fraction along with airflow. Initial material feed pipe is arranged directly above initial material distributor. Finished product discharge pipe is arranged at housing bottom section.
EFFECT: higher efficiency of rubbing-off and separation.
FIELD: process engineering.
SUBSTANCE: invention relates to combined methods of separation of solid materials, particularly, to processing of radio electronic scrap. Proposed method comprises primarily two-step separation of solid materials by hammer crushers to required size, magnetic and screen separation of ground scrap with subsequent pneumatic classification by bulk density of oversize and undersize products of screen classification. Note here that ground scrap fraction of boundary size obtained at pneumatic classification is subjected to additional grinding at ball mill to size of nonmetallic component of not over 1 mm. To isolate metallic component of processed scrap aforesaid ground fraction is subjected to pneumatic classification by bulk density.
EFFECT: higher efficiency of processing.
FIELD: process engineering.
SUBSTANCE: invention relates to mining and can be used for extraction of valuable components and products of their processing, particular, for extraction of copper, nickel and iron sulphides and noble metals from aged tailings of suspended tailing pit of in cryolite zone of Norilsk deposits. Dressing module comprises open-pit field, two or three dredges, beach pump station consisting of stationary and vibratory screens, sunk basin with overflow pocket communicated by gravity feed hydraulic transport with open-pit field. Besides, it comprises two pump, pressure five-jet pulp separators communicated with vibratory screens, sunk basins and pump communicated with batteries of desliming 250 mm-dia hydraulic cyclones with their sand outlets connected via sunken basins and controlled-delivery pumps with said pressure five-jet pulp separators and, further, with rotary separators. Tailings from the latter are communicate by gravity feed hydraulic transport via appropriate sunk basin and controlled-delivery pump with mechanical camber flotation machine consisting of 130 m3-chambers. Concentrate outlet is communicated with appropriate sunk basin and controlled-delivery pump and, further, with pneumomechanical camber flotation machine consisting of four first-cleaner 17 m3-chambers. Concentrate outlet is communicated with appropriate sunk basin and controlled-delivery pump and, further, with pneumomechanical camber flotation machine consisting of four second-cleaner 8 m3-chambers. Module includes one or two giant jets installed in open-pit field lane, distribution box to direct portion of warm desliming drains by gravity feed hydraulic transport to open-pit field to accelerate tailing thaw and wash-off at two or more point of the pit and further direction to pit lane, screens mounted at beach pump stations, said screens feature 12-16 mm square meshes. Main flotation chamber has three chambers. Desliming hydraulic cyclones feature two cones with 20-10 deg-taper angle. Beach pump station sunk basin overflow pocket is additionally communicated by gravity feed hydraulic transport with two or three points of open-pit working board to return excess pulp into lane and to accelerate tailing thaw and wash-off.
EFFECT: higher yield and quality of flotation, decreased losses of valuable elements.
FIELD: process engineering.
SUBSTANCE: set of invention relates to concentration of minerals and can be used at coal dressing plants. In compliance with first version, proposed plant comprises pulp feed line connected with inlet of first hydraulic cyclone for slurry classification with its sand outlet connected to first stage helical separator inlet. Said plant is equipped with second hydraulic cyclone for thickening of fine concentrate and helical separator of second stage. First stage helical separator outlet for concentrate is connected with arched screen inlet with its undersize outlet connected with fine concentrate sump. Sump fine concentrate outlet is connected with second hydraulic cyclone with its sand outlet connected with second stage helical separator inlet. Second stage separator fine concentrate outlet is connected with centrifuge inlet. Oversize screen outlet is connected with the same inlet of centrifuge. Centrate outlet of centrifuge filtration section is connected with fine concentrate sump. Centrate outlet of centrifuge precipitation section is connected with high-ash sludge sump. Note here that outlets of both cyclones and outlet of second stage separator are connected wit appropriate lines of feeding drainage into thickener. In compliance with second version, proposed plant incorporates no second stage helical separator while peck outlet of second cyclone is directly connected with centrifuge inlet.
EFFECT: extraction of coal particles sized to 0,04-1 (2) mm in one process step.
4 cl, 2 dwg
SUBSTANCE: processing method of potassium production wastes involves stage hydrocyclonage of wastes in the form of slurry pulp with separation of preliminary concentrate and pulp of tail ends. Then, dehydration, preliminary drying, granulation and drying of preliminary concentrate is performed so that concentrate is obtained. With that, hydrocyclonage is performed in four stages on 10, 7, 5 and 5-degree hydrocyclones with pulp temperature of 40÷50°C, under pressure of 3÷5 atm at the ratio of unloading-to-drain head pieces, which is equal to (1.14÷1.17):1. Granulate is dried at 150÷200°C. After drying is completed, granulate is annealed at the temperature of 650÷950°C so that roasted product is obtained. After preliminary concentrate is separated, pulp of tail ends is clarified, and thickened part is returned to the processing process to the first stage of hydrocyclonage.
EFFECT: maximum waste utilisation; final waste utilisation product can be used as complex fertiliser of prolonged action, which is ensured with peculiar features of its composition and the state gained during waste processing.
FIELD: oil and gas industry.
SUBSTANCE: method for obtaining and using products of hydraulic borehole mining involves drilling of production wells, water jet destruction of mine rock massif in the mineral deposit, hydraulic lifting along the well to the day surface of mine rock material, hydraulic transportation of mine rock material and its output in the form of a vertical fan-like pulp flow to the depositing site, catching from the pulp flow of a heavy ore-containing fraction, drainage of a hydraulic mixture of sand and clay via a drain channel to a sediment pond, clarification of water in the sediment pond, return of clarified water to a return water supply diagram of production wells. After gravitational separation on the depositing site of fractions of mine rocks, a turbulent flow of hydraulic mixture of sand and clay along spiral trajectory from the drain part of the depositing site is supplied by gravity tangentially to a hydraulic cyclone, where sand is deposited in an accumulating sump, where from it is pumped out by a pump. Water-clay mixture is supplied by gravity to a coagulation capacity, where accelerated deposition of clay into the accumulating sump takes place under action of gravitational forces, physical field and chemical reagent, where from it is pumped out by the pump. Clarified water is supplied by gravity to the return water supply diagram of production wells. Separated sand fraction is supplied to working face of production wells as an abrasive component of the jet and used for strengthening and disintegration of hard mine rocks. Separated clay fraction is used during drilling of production wells containing drilling and plugging compounds. The method is implemented by means of a device comprising a production well, a transport pulp line, a depositing site, a catcher of heavy ore-containing fraction, a transport system of water jet mixture of sand and clay. It includes a hydraulic cyclone and a coagulation capacity, which are made in the ground, near the lateral side of the depositing site. Wall of end face side of the drain part of the depositing site is made in the form of an opening branch of a spiral, the centre of which coincides with hydraulic cyclone centre.
EFFECT: improving efficiency of primary benefication of minerals on a production field at hydraulic borehole mining.
8 cl, 4 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to mining, particularly, to dressing of minerals, e.g. ores of ferrous, nonferrous and noble metals, nonmetallic minerals and man-made formations. Proposed method comprises crushing, shredding, sizing and drying of mineral processing products before electric separation. Drying is carried out at natural positive temperature of processing product and decreased pressure of 1-150 mm Hg. Heat power released in phase transfer is returned to drying process.
EFFECT: higher environmental safety, power savings.
1 dwg, 3 tbl, 3 ex
FIELD: process engineering.
SUBSTANCE: invention relates to concentration of siliceous rocks. It may be used in food, pharmaceutical and chemical industries for making of filtration material, or in construction as an additive for production of mortars, concretes and dry construction mixes. Proposed method comprises diatomite preparation, extraction of target fraction, grinding and acid treatment under boiling conditions. Additionally, extracted target fraction is annealed in boiling bed furnace at 550-900°C for 20-360 s. Said target fraction is separated mechanically by centrifugal and vibration forces. Acid treatment is carried out along with mixing for 20-30 min at acid concentration of 0.1-0.5 H. Hydrochloric or sulphuric acid is used to this end.
EFFECT: higher efficiency of separation, required quality of diatomite, decreased content of harmful impurities.
2 cl, 1 dwg, 2 tbl, 18 ex
FIELD: process engineering.
SUBSTANCE: invention relates to dressing of minerals and may be used in mining in concentration of large-lump minerals. Proposed method comprises the steps that follow. Crushing the ore to different sizes. Sizing the ore. Separating to fractions with respect to content of valuable component (except for fine fractions) and determining the optimum crushing size by extremum of portion contract factor-to-crushing degree ratio with due allowance for yield and extraction of fine fractions. Boundary diameter of ore fine fractions makes 5-50 mm and is specified by there requirements of State standard to commercial lump concentrate or machine fraction, that is, processes possibilities of feeding initial size of selected dressing process.
EFFECT: optimum selection of crushing size to up concentrate quality and yield of valuable component in concentrate.
FIELD: process engineering.
SUBSTANCE: invention relates to ore processing and may be used at mining plants for concentration of minerals. Proposed method comprises crushing ore samples, sizing crushed samples, fractionation of grain-size categories to content of valuable component. After fractionation, slime fractions of valuable mineral is integrated with slime fraction of country rock to define optimum parameters of crushing from extremum dependence of contrast ratio on duration of grinding. Marginal diameter of slime fraction grains of both valuable minerals and country rock makes 5 to 20 mcm depending upon used concentration method.
EFFECT: higher quality of concentrates and yield of valuable minerals.
FIELD: process engineering.
SUBSTANCE: invention relates to mining, particularly, to concentration of mineral resources and may be used in deep treatment of ore and nonmetal mineral stock. Proposed method comprises ore crushing, preparing gas-water emulsion, saturation of mineral suspension with gas bubbles by mixing it with prepared gas-water mix, mineralisation of gas bubbles and their separation as flotation concentrate. Oxygen-water emulsion is produced by electrochemical method in forcing water through anode chamber of flow membrane electrolyser. Mineral suspension containing crushed ore is pre-saturated with hydrogen bubbles of 50 mcm-size, and smaller, by forcing it through cathode chamber of flow membrane electrolyser. Suspension discharged from cathode chamber is mixed with oxygen-gas emulsion to irradiate produced mix by light in the range of ultraviolet wavelength to be directed into flotation machine chamber wherein it is additionally saturated with air bubbles of common flotation fineness.
EFFECT: higher efficiency flotation concentration of ores.
SUBSTANCE: method involves material treatment with reagent and gravitational preparation with dynamic action. At that, material treatment is performed with reagent of mixture of surface active substance of anionic type with concentration of 0.5 mg/l and antifoaming agent of 0.6 mg/l to dynamic action on mineral product.
EFFECT: improving the extraction of floating gold from mineral products.
FIELD: technological processes.
SUBSTANCE: invention relates to the field of floatation dressing of sulphide ores with industrial content of precious components, such as copper, zinc and noble metals. The method of floatation of copper-zinc-pyrite ore includes grinding in alkaline medium, conditioning with reagents - collectors and a foaming agent, collective copper-zinc floatation to produce a collective concentrate, containing minerals of copper and naturally activated sphalerite, and tails. The collector is a composition of selective weak collectors fed in the following sequence - isobutyl dithiophosphate and isopropyl-O-methyl-N-thionocarbamate and a strong collector - a butyl xanthate at the ratio of 3:4.5:1; at the same time tails of collective copper-zinc floatation are conditioned with blue vitriol, to activate sphalerite, lime and a collector, such as a composition of selective weak collectors - isobutyl dithiophosphate and isopropyl-O-methyl-N-thionocarbamate and a strong collector - butyl xanthate at the ratio of 3:4.5:1, and selective floatation is carried out to extract sphalerite into zinc concentrate and production of final pyrite-containing tails. According to the other version of the method realisation the tails of collective copper-zinc floatation are conditioned with blue vitriol, to active sphalerite, with lime and a collector, such as a composition of selective weak collectors - isobutyl dithiophosphate and isopropyl-O-methyl-N-thionocarbamate at the ratio of 1:1.5, and selective floatation is carried out to extract sphalerite into zinc concentrate and to produce final pyrite-containing tails.
EFFECT: improved efficiency of floatation.
2 cl, 1 tbl, 2 ex
FIELD: process engineering.
SUBSTANCE: invention relates to mining and may be used in deep processing of ore and barren mineral stock. Method comprises crushing ore, preparing has-water emulsion, saturating mineral suspension with gas bubbles by mixing it with prepared gas-water emulsion, mineralising gas bubbles and separating mineralised bubbles in the form of slime concentrate. Gas-water emulsion "oxygen-water" is prepared by photo electrochemical method in forcing water through anode chamber of direct-flow membrane crystalliser and subjecting it to UV radiation to produce high-activity ozone oxidiser, hydroxide radicals, and hydrogen dioxide. Mineral suspension containing crushed ore is pre-saturated with hydrogen bubbles, bubble size making 50 mcm and smaller, in forcing it through catalyser cathode chamber. With suspension escaping from cathode chamber, collector is added to suspension to be mixed with "oxygen-water" emulsion. Mix produced is fed into flotation machine chamber to be mixed and additionally saturated with air bubbles of standard flotation size.
EFFECT: higher efficiency.
SUBSTANCE: method involves preparation of a suspension and its gravitational concentration. For selective extraction of finely dispersed mono-mineral fractions, polyacrylic acid salts containing 10-120 mono-mineral links or alkylnaphthalene sulfoacid modified with formaldehyde and containing 2-8 monomineral links are added in amount less than 2.5% of the weight of the solid phase of the suspension. The alkyl used is butyl or isobutyl.
EFFECT: more efficient separation of polymineral finely dispersed suspensions with particle size less than 40 micrometres.
2 cl, 2 tbl, 2 ex
FIELD: process engineering.
SUBSTANCE: invention relates to mining, namely to ore concentration by flotation and can be used to deep flotation of ore and non-ore mineral stock. Method of flotation concentration of ore containing sulphide minerals and gold comprises preparing gas-water suspension, saturating mineral suspension with gas bubbles via mixing with prepared gas-water emulsion, mineralising gas bubbles and separating mineralised bubbles in the form of flotation-concentrate. Gas-water emulsion, "oxygen-water", is prepared electrochemically by forcing water through anode chamber of membrane-type flow electrolyser. Note that said mineral suspension is simultaneously saturated by hydrogen bubbles, their diametre making, preferably, 50 mcm and less, forcing it through anode chamber of membrane-type flow electrolyser. After mixing mineral suspension with "oxygen-water" emulsion, formed mix is directed into flotation machine chamber to get mixed and saturated by air bubbles of common flotation sizes.
EFFECT: higher flotation efficiency and specific efficiency.
FIELD: mining engineering.
SUBSTANCE: invention refers to the processes of flotation and magnetic enrichment of minerals, particularly to the extraction of copper, nickel and precious metals from magnetic fraction of stored and current mine refuses of impregnated sulphide copper-nickel ores. The method can be used for increasing extraction of precious ferromagnetic components from other types of ores and conversion products. The method comprises screen separation, deslurrying, centrifugal enrichment, flotation, magnetic separation of flotation residue, arranging pulp for magnetic fraction flotation and flotation of magnetic fraction. The pulp for magnetic fraction flotation is arranged in three stages. The first stage comprises mechanical processing of magnetic fraction including feeding sulphydryl collector in proportion to quantity of regrind grain-size class into the mill prior to processing. The second stage consists in pulp demagnetising. The third stage consists in adding multifunctional modifying agent (e.g. soda).
EFFECT: improved flotation efficiency.
1 tbl, 7 ex
SUBSTANCE: invention is related to methods for cleaning and enrichment of particulate materials and may be used in preparation for further processing of rocks, in which useful component is either located in shell or in mineral grain nucleus. Method for attritioning of ores includes mixing of pulp in machine chamber in presence of reagents and material, hardness of which is more than 6 according to Mohs scale. Reagent used is peptizing agent, for instance, liquid glass with temperature of 40° or salts of carboxymethylcellulose. Material with hardness of more than 6 according to Mohs scale is represented by granules with diametre of 4-10 mm. Lower part of machine chamber is arranged in the form of truncated cone with height that does not exceed distance from chamber bottom to upper disk of impeller, under which under-impeller cone is installed. Turbulent motion of pulp is created for maximum collision of mineral particles with granules with the help of radial ribs arranged on truncated cone.
EFFECT: higher efficiency of films attritioning from surface of grainy materials, reduction of intermediate product amount, and also lower circulation of enrichment products and improved quality of produced concentrate without extraction losses.
1 dwg, 4 ex
SUBSTANCE: invention refers to cleaning of mineral grains contained in pulp products at ore concentrating from undesirable sediments such as flotation reagents and sludge coating and can be implemented for mechanical activation of non-ferrous and ferrous metal ores, for coal and other minerals prior to operation of desorption and also prior to operations of selective separation of concentrates, and to cleaner flotation for production of finished concentrates. The method of cleaning mineral grains in ore suspension such as flotation reagents and sludge coating consists in tangential supply of source suspension under pressure into a working zone of the cylinder part of the case via a flow divider arranged so that counter flows collide in the zone of flow compression and deformation; this zone is limited with the interior wall of the cylinder part of the case and with curvilinear exterior part of the splitter installed on a discharge sleeve. The method is implemented by means of the device including a cylinder case with two tangential feeding sleeves arranged at various height, set off along perimeter of the cylinder approximately at 180° and communicating between them by means of the divider supplying source suspension into them; also the device includes a conic part of the case with a sand nozzle located under the cylinder part of the case. The discharge sleeve with the splitter secured thereon is made in form of exterior and interior cylinder surfaces. The interior surface of the splitter has radius r1 calculated from radius R of the cylinder part of the case. The exterior surface of the splitter limiting the zone of flow compression and deformation is made in form of ellipse with half-axes r1 and r2, where radius r2 is bigger, than r1.
EFFECT: increased efficiency of mineral grains cleaning from flotation reagents and sludge coating, also reduction of power consumption.
6 cl, 4 dwg
FIELD: methods and the equipment for production of briquettes out of different powder materials.
SUBSTANCE: the invention presents a method, which is dealt with the field of flotation of hard-floatable nickel - pyrrhotine materials bearing noble metals, which may be used for extraction of nickel, copper and noble metals from the storage ores and products of flotation. The technical result consists in an increased level of end-to-end extraction of non-ferrous and noble metals in a shared concentrate due to an increased efficiency of the floatation activity of sulfide minerals in the process of preparation of the hard-floatable nickel - pyrrhotine materials to a flotation. The method provides for a preliminary preparation of the material to a flotation, introduction of a sulfhydryl collector in the pulp and a flotation of sulfides. The preliminary preparation of the material to a flotation is realized in two stages. At that at the first stage the material is exposed to mechanical activation in a shredding apparatus at the presence of an abrasive dispersible material particles of 74-500 microns sizes. At the second stage of the pulp agitation a chemical activation of the ground material in the apparatus is conducted with stirring at the presence of an alkaline reagent up to the value of рН 7.0-10.8 for 3-10 minutes. The flotation of sulfides is conducted at a mass ratio of pyrrhotine and the sulfhydryl collector from 1:0.0004 up to 1:0.0028.
EFFECT: the invention ensures an increased level of end-to-end extraction of non-ferrous and noble metals in a shared concentrate.
2 cl, 22 ex, 1 tbl