Process to manufacture purified carbon from brown coal and process line therefore
FIELD: mining industry.
SUBSTANCE: process to manufacture purified carbon from brown coal implies treating loosened batch mixed with water in cavitation apparatus, which provides for disintegration of organic portion of carbon-containing mixture down to particles of less than 20 mcm. Then, resulting water-carbon mixture is directed to separation tank for sedimentation of mineral mass, which is regularly dumped. From the separation tank, mixture is fed to electrophoretic separation device, out of which paste-like carbon-containing mixture is extracted. Cavitation apparatus power is selected in such a way so as to obtain inorganic particles larger than the organic ones in the water-carbon mixture. Impact cavitation action is applied to continuous slurry flow, while water-carbon mixture is held in the separation tank for at least 20 sec.
EFFECT: high efficiency; production of low-ash purified carbon from brown coal.
5 cl, 1 dwg
The invention relates to the field of mining industry, in particular to the field of processing of brown coal, and can be used for obtaining purified carbon from brown coal.
Lignite is common and cheap fuel, but with a relatively low calorific value and high ash content.
Rough cut brown coal is composed of humic acid, bitumen and amorphous carbon, and inorganic mineral compounds that form its high ash content up to 50%.
Currently known various methods of coal - manual disassembly (rarely), the enrichment in heavy suspensions and solutions (including salt) class 200-50 mm, tsadka, class 50-12 μm in heavy suspensions in the hydrocyclone, class 10 μm, flotation, class 10 microns and others (e.g., fundamentals of metallurgy, vol. 1, part 1. - Metallurgizdat. 1961, str, RF patent № 2223828, IPC B03D 1/02).
The disadvantage of these methods is the processing of relatively large particles of raw materials, which leads to poor concentration. Mineral particles, including fine may be recovered in the tails only when fine grinding, which is not usually preceded by the traditional methods of enrichment or complex and expensive, such as flotation or enrichment in heavy suspensions in the hydrocyclone. In addition, all read the certain methods of grinding does not include the separation of the organic part of brown coal into its component parts.
Closest to the claimed is a method of obtaining carbon briquettes, including the processing of carbon in the mixture mixed with 30-50 wt.% water in rotary suction apparatus at a temperature of 15-70°within 5-50 cycles and the number of revolutions of the rotor of the cavitator 3000-12000 per minute (RF patent No. 2249612, IPC C10L 5/04, C10L 5/06, C10F 7/06). Production line used for the implementation of this method, containing the shredder and suction apparatus, can also be selected as the closest analogue to the claimed process line.
However, the known method and device for its implementation does not allow to reduce the ash content of the processed raw materials, since their use does not highlight the mineral component of the processed mixture.
The problem to which the invention is directed, is to create a highly effective method of obtaining purified carbon low ash from brown coal.
The technical result of using the proposed solution consists in obtaining purified carbon with very low ash content.
The above problem is solved and the specified technical result is achieved due to the fact that the method of obtaining purified carbon from brown coal, including the processing of the crushed mixture in a mixture with water in the cavitation apparatus is ATA, as a cavitation device uses suction apparatus, providing the disintegration of the organic part of the carbon-containing mixture to particle sizes less than 20 μm, as obtained after processing in the cavitation apparatus vodopadnoy mixture is sent to a settling tank where settling of mineral mass, which periodically remove the blade, and from the sump vodoohranoy the mixture is fed into the device, electrophoretic separation, from which are obtained in the form of carbon paste mixture is extracted. When this shock cavitation effect is carried out in a continuous flow pulp, vodopadnoy mixture was kept in the tank for at least 20 seconds, and the obtained paste carbonaceous mass is removed with a brush. Power cavitation device is chosen so that after the disintegration of the particle size of the inorganic part vodopadnoy mixture exceeded the size of the particles of the organic portion of the mixture.
Also the above problem is solved and the specified technical result is achieved due to the fact that in a production line, designed to produce purified carbon from brown coal, including the shredder and suction apparatus, added a sump connected by pipeline with the cavitation apparatus, and device El is trafaretnaja division, United pipeline with the sump.
This shredder can be made in the form of mill, and as the device electrophoretic separation can be used electrophoretic drums or disks of at least two.
Processing the crushed mixture in a mixture with water in the cavitation apparatus providing the disintegration of the organic part of the carbon-containing mixture to a particle size less than 20 microns, allows you to split the processed raw materials for organic and inorganic constituents. The use of the cavitation effect enables the creation of internal stresses in the particles of brown coal, sufficient to transfer its organic part in the solution and polyolene state, emitting precipitated inorganic mineral particles (up to 80%). The use of a settling tank allows you to bring in the dump phase precipitate particles of mineral raw materials. This significantly reduces the ash content of lignite. To obtain the maximum possible sediment mixture is maintained in the sump at least 20 seconds, and the power cavitation device is chosen so that after the disintegration of the particle size of the inorganic part vodopadnoy mixture exceeded the size of the particles of the organic mixture. As polyolene particles of amorphous carbon have a negative charge, they is there to be extracted from the pulp electrophoretic method, that also improves the quality extracted from brown coal carbon. Additionally, due to the very small particle size carbon due to forces of adhesion is samoregulirovanie paste of carbon, which allows no special actions (pressing) to form optionally briquettes.
The invention is illustrated by the drawing, which shows a block diagram of the inventive process line.
Production line consists of mill 1, which can be used with standard mill, such as ball, connected through the first pipeline 2 with cavitation apparatus 3, in which, for example, used rotary pulsation apparatus, hydraulic shock and cavitation action described in the application for the patent of the Russian Federation No. 2004105762 connected with the second pipe 4 with the tank 5, which are connected to the third pipe 6 and the fourth line 7, the latest the other end is connected to the device electrophoretic separation 8. As the device electrophoretic separation can be used standard electrophoretic drums or disks of at least two.
The inventive method can be implemented using the claimed process line as follows.
Brown coal in bulk supplied to the primary MEAs is Lonnie in the mill 1. Grinding produce up to 100 μm. In the mill 1 crushed material is mixed with water. Then the material obtained by the first pipeline 2 in the form of a slurry is fed to the disintegration suction apparatus 3. Next, produce the disintegration of the ground particles of the organic component to polugolodnomu state of amorphous carbon, translation of humic acids and bitumen in solution and highlight the inorganic part in the form of particles less than 100 microns. Disintegrated mass in the form of slurry is directed through a second pipeline 4 in the tank 5, where the sedimentation of inorganic mineral mass, which is periodically removed by the third pipe 6 in the blade. For maximum sediment slurry, before sending in the fourth line 7, stand in the tank for at least 20 seconds. From the sump 5 slurry with an organic part on the fourth line 7, made for example in the form of a trough, is directed to an electrophoretic device for the separation. Due to the fact that the particles of the components included in the composition of brown coal, have different charges, they settle on the drums (discs) of different polarity. Particles of amorphous carbon and residual silicon oxide deposited on the drum that is charged positively. The oxides of iron, calcium, etc. are deposited on the drum (disc), negatively charged.
USAID is installed on the reel (s) particles are removed with a brush in the paste form. Pasta with drum, positively charged, and sent to the granulation and drying (amorphous carbon), and with drum, negatively charged, in the dump. The resulting solution of humic acids and bitumen disposed.
The inventive method and production line for its implementation can achieve a technical result, which enables enrichment of brown coal, its division into parts with the selection in a separate fraction of amorphous carbon (actually cleaned coal) - analog coke without the use of pyrolysis and chemical reagents, which makes the proposed technology is environmentally safe.
1. A method of obtaining purified carbon from brown coal, including the processing of the crushed mixture in a mixture with water in the cavitation apparatus, characterized in that as a cavitation device uses suction apparatus, providing the disintegration of the organic part of the carbon-containing mixture to particle sizes less than 20 μm, as obtained after processing in the cavitation apparatus vodopadnoy mixture is sent to a settling tank where settling of mineral mass, which periodically remove the blade, and from the sump vodoohranoy the mixture is fed into the device, electrophoretic separation, from which the extract obtained in paste form carbon-containing mixture.
2. JV the property according to claim 1, characterized in that vodopadnoy mixture is maintained in the sump of at least 20 C.
3. The method according to claim 1, characterized in that the paste carbon-containing mixture is removed with a brush.
4. The method according to claim 1, characterized in that the shock-cavitation impact in a continuous flow pulp.
5. The method according to claim 1, characterized in that the power of the cavitation device is chosen so that after the disintegration of the particle size of the inorganic part vodopadnoy mixture exceeded the size of the particles of the organic mixture.
FIELD: manufacture of building materials.
SUBSTANCE: carbon briquettes based on ground carbon-containing starting material (peat, coals, and the like) are fabricated by mixing starting material with 30-50% of water, treating the mix on rotary cavitation apparatus in 5 to 50 operation cycles at 15 to 70°С and cavitator rotor speed 3000-12000 rpm, pouring out thus treated mix into special molds, wherein mix is dried in air flow at 15 to 100°С to form ready-to-use briquettes (after cooling, if needed).
EFFECT: simplified fabrication process and increased process efficiency.
FIELD: processes for extracting gold from ores.
SUBSTANCE: method comprises steps of breaking ore, double-stage disintegration of it, sorting, gravitation and flotation con centration, sorption leaching, electrolytic extraction of gold and melting it. At cycles of primary and secondary disintegration of initial ore hydraulic sorting is performed for producing sand fraction of ore and drain. Then sand fraction is divided by flow for gravitation concentration and flow for secondary disintegration. Divided flow of sand fraction is fed for gravitation concentration in quantity determined according to given formula: γ gr.f. = (0.3 - 0.4)γ in.ore + (0.2 - 0.6)γ circ.load where γ gr.f - mass of sand fraction of disintegrated ore fed for gravitational concentration; γin.ore - mass of initial ore fed for primary disintegration; γ circ.load - mass of circulation load for secondary disintegration. Gravitational concentration of drain and divided flow of sand fraction are realized for producing separate gravitation concentrates and separate tails. Then gravitation concentrates of drain and divided flow of sand fraction are combined and after their combination they are divided by "gold head" concentrate and depleted gravitation concentrate. The last is subjected to intensified cyaniding for producing solid phase and gold- containing solution. Tails of gravitation concentration of drain of sorting are subjected to flotation and prepared flotation concentrate is combined with solid phase of intensified cyaniding to be subjected to sorption leaching and desorption for producing gold-containing solution. Then separate electrolytic deposition of gold from gold-containing solutions of intensified cyaniding and sorption leaching is performed for producing separate cathode deposits of gold. Produced " gold head" and cathode deposits of gold are subjected to calcining and melting for producing gold in ingots.
EFFECT: lowered losses, increased degree of gold extraction, reduced circulation load and therefore improved efficiency of gold extraction.
FIELD: mining, particularly open cast kimberlite pipe mining.
SUBSTANCE: method involves mining ore body by hydromining device of floating dredger; supplying diamond-containing pulp to floating dressing plant, recovering diamonds and transporting reject material from pit to preliminarily prepared plate for following utilization thereof. Ore body is developed by hydromining device reciprocation across total ore body area. Diamonds are recovered by serial pump decomposition, sizing, dressing and conditioning. Residual material is utilized by dewatering thereof in centrifuge and stacking for following usage for building material production.
EFFECT: simplified method and rig and decreased power inputs for kimberlite pipe development.
2 cl, 2 dwg
FIELD: manufacture of building materials.
SUBSTANCE: waste stream containing bauxite tails is dispersed to form homogenous powder and water is then added to form freely flowing suspension. The latter is treated with acid to neutralize any alkaline compounds present therein to pH about 5.5-6, resulting in formation of aqueous solution of salts of acid utilized. This solution is separated from insoluble suspension material, which is added to building and other materials.
EFFECT: increased strength of materials and reduced water absorption thereof.
28 cl, 2 ex
FIELD: mining industry; methods of the minerals concentration.
SUBSTANCE: the invention is pertaining to the field of the minerals concentration and may be used at reprocessing of the cobalt-bearing iron-manganese oceanic formations (crusts and concretions) extracted from the bottom of the world ocean and containing besides manganese, cobalt and iron also the nickel, copper, noble and rare metals. The method of reprocessing of the cobalt-bearing iron-manganese oceanic formations includes crushing, grinding, grading and the subsequent separation of manganese and the nonferrous metals. The first version of the method provides, that after the grading from the fraction of 0.5÷0.074 mm exercise extraction of the manganese and the nonferrous metals by the gravity concentration on the table concentrator with the subsequent three-stage magnetic separation of the light fraction of the table concentrator. At that the intensity of the magnetic field of the separator on the first stage compounds from 3500 up to 4000 oersted, on the second stage - from 6500 up to 7200 oersted and on the third stage - from 8000 up to 8200 oersted. At that the manganese and the nonferrous metals are extracted into the magnetic fraction of the third stage. The second version of the method provides, that the grading is exercised for the fraction of 12÷0.5 and 0.5÷0.074 mm, and separation of the manganese and the nonferrous metals is exercised from the received fractions by the gravity concentration on the settling machines from the fraction of 12÷0.5 mm and on the table concentrators from the fraction of 0.5÷0.074 mm. At that the manganese and the nonferrous metals are extracted into the light fractions of the gravity concentration, which are routed to the chemical-metallurgical finishing. The cycle of reprocessing for the both versions of the method is exercised in the module on the ocean floor. The technical result of the invention is the increased share of the manganese extracted into the joint concentrate of manganese, cobalt, nickel and copper, the improved world ocean floor environmental ecology, the reduced volume of the material lifted from the ocean floor.
EFFECT: the invention ensures the increased share of the manganese extracted into the joint concentrate of manganese, cobalt, nickel and copper, the improved world ocean floor environmental ecology, the reduced volume of the material lifted from the ocean floor.
2 cl, 2 dwg, 2 tbl
SUBSTANCE: invention relates to a sedimentation/flotation system wherein mineral flow, such as concentrate after pre-flotation or cleaner flotation, is subjected to two-step separation. In the first step, riddle allows creating flow of coarse particles, above 110 μm, and flow of particles lesser than 110 μm. In the second step, small particle flow is subjected to further separation, wherein cyclone produces flow of superfine particles/slimes having p80 value lower than about 25 μm and flow of intermediate-size particles with p80 value higher than about 25 μm. Intermediate-size particle flow is subjected to flotation to recover nickel sulfide, which is sent to final concentration and removal or sedimentation of magnesium oxide, which is subjected to gravitational separation to concentrate MgO. Nickel sulfide and magnesium oxide minerals possess significantly differing densities that can be utilized to employ gravitational separation equipment to achieve separation of magnesium oxide.
EFFECT: enabled efficient separation of magnesium oxide.
16 cl, 2 dwg, 2 tbl
FIELD: mining; methods of extraction of the useful ingredients from the naturally clay bonded sands.
SUBSTANCE: the invention is pertaining to the field of dressing of the natural resources, in particular, to the preparatory processes of the gravity concentration of the gold-bearing sands, desintegration and extraction of the useful ingredients from naturally clay bonded sands. The method of extraction of the useful ingredients from naturally clay bonded sands provides for pressing in the block of the naturally clay bonded sands of the mechanical impurities, their feeding in the scrubber, desintegration, gravity concentration, separation of the mechanical impurities in the pure state and with the nondesintegrated argillous pellets. The further routing of the mechanical impurities to pressing in the block of the naturally clay bonded sands, and the nondesintegrated argillous pellets - repeatedly - to the flushing. Before each cycle of feeding in the process of pressing in of the mechanical impurities they are treated with the surface active substances in the amount of 0.05-0.4 m3 per 1 m3 of the particles. The technical result of the invention is the increased efficiency of the desintegration and the decreased losses of the useful ingredient with the nondesintegrated argillous pellets.
EFFECT: the invention ensures the increased efficiency of the desintegration and the decreased losses of the useful ingredient with the nondesintegrated argillous pellets.
2 cl, 1 tbl, 2 ex
FIELD: concentration of minerals; concentration of ore raw material requiring preliminary grinding.
SUBSTANCE: proposed method includes crushing, grinding, floatation and cyaniding of ore. At grinding stage, bornyl acetate is added in the amount of 30-45 g/t which is obtained by extraction from sage-brush or fir oil. Ground ore is subjected to classification and fraction of ore lesser than 0.1 mm is directed for main floatation, further cyaniding and sorption by coal.
EFFECT: increased extraction of finely-disseminated - finely-dispersed gold from auriferous ores; enhanced operational efficiency of grinding unit; reduced power requirements.
FIELD: mining industry; methods of concentration of the magnetite ores.
SUBSTANCE: the invention is pertaining to the method of concentration of the minerals, in particular, the magnetite ores. The method allows to reduce the share of the ballast (not requiring crushing) material. The method includes the feeding of the pulp-shaped material intended for the wet magnetic separation into the apparatus, where using the gravitational method the pulp-shaped material is separated for two fractions: the light fraction and the heavy fraction. The heavy fraction is sent directly for crushing (uniting it with the magnetic product of separation), or using the magnetic field divide it into the nonmagnetic part and the magnetic part. At that the nonmagnetic part is dumped in the refuse tailings, while the magnetic part is directed to the mill or subjected to the gravitational separation with production of the heavy and light products. The heavy product consisting of the particles of the opened useful mineral is withdrawn avoiding the crushing as the rough iron concentrate. The light product consisting of the accreted particles is routed into the drum-type mill.
EFFECT: the invention allows to reduce the share of the ballast (not requiring crushing) material.
5 cl, 6 dwg
FIELD: processes for separating carbon-containing component of natural coal, coal slime or waste materials of coal concentration, possibly in coal, fuel and metallurgical industry branches for producing high-grade, high-calorie, low ash content coal.
SUBSTANCE: method for concentrating coal comprises steps of mixing initial coal raw material and water for receiving water-coal suspension; adding to said suspension agglomerating agent; separating carbon-containing component of coal raw material and ash in water-coal suspension; extracting carbon-containing component by flotation; in addition introducing frothing agent to water-coal suspension and separating carbon-containing component of coal raw material and ash by means of steam blown-in by separate streams for thinning ash-fraction component. Water-coal suspension includes 7.00 - 50.00 mass parts of water per 1 mass part of coal. Flow rate of steam is no more than 500 kg per ton of initial coal raw material. Flow rate values of agglomerating agent and frothing agent are in range 3 - 7 kg and 0.05 -0.15 kg respectively per 1 t of water-coal suspension.
EFFECT: reduced expenses for realization of method, less loss of yield of carbon-containing component, enhanced efficiency of removing ash from carbon-containing component.
9 cl, 2 tbl, 6 ex
FIELD: automatically controlled operation of concentration mills, in particular, flotation separation of converter matte.
SUBSTANCE: method involves additionally determining content of 20-45 micrometer fractions in wastes of test classifications of first and second grinding stages and maintaining said content within the range of 15-20% and 10-15% by weight of ground mass, respectively, and maintaining content of fraction sized up to 45 μm within the range of 45-50% and 25-35% by weight of ground mass, respectively, with waste density of 2.0-2.2 kg/l and 1.9-2.1 g/l, respectively, by altering water to converter matte ratio during charging of first grinding stage mill and density of wastes of test classifications of first and second grinding stages depending on variations in content of fraction of 20 μm to 45 μm; additionally determining content of 5-45 μm fraction and maintaining said content within the range of 65-75% by weight of ground mass, and maintaining content of fraction sized up to 45 μm within the range of 80-95% by weight of ground mass by varying water to converter matte ratio during charging of first stage grinding mill depending on variations in content of 5-45 μm sized fractions.
EFFECT: reduced slug formation and increased extent of releasing concretions of ground crude material.
3 dwg, 2 tbl, 2 ex
FIELD: concentration of minerals.
SUBSTANCE: proposed method includes disintegration of dust at simultaneous preparation of pulp and removal of foreign admixtures; operations are performed in scrubber-washing drum. Then pulp is admitted to pulp line in counter-flow; aeration of pulp is performed in pulp line by means of air bubbles of one size and duration of life no less than 1-2 minutes; proposed method includes also forming standing acoustic waves perpendicularly to pulp flow at frequency ωac corresponding to resonance frequency ω0 of air bubbles of one size 10. Action of centrifugal and acoustic fields on pulp is performed in acoustic chamber at hydrostatic pressure of 4-5 atm. Acoustic field is formed in acoustic chamber by waves of final amplitude at frequency ωac corresponding to resonance frequency ω0of air bubbles of one size 10 by means of acoustic radiators smoothly distributed over surface of acoustic chamber.
EFFECT: enhanced efficiency of entrapping fine gold.