Complex processing of martite-hydrohematite ore

FIELD: mining.

SUBSTANCE: proposed process comprises ore screening, magnetic separation to obtain magnetic and nonmagnetic fractions, grinding, hydraulic classification, thickening and drying. Martite ore is first subjected to screening with separation to three size classes, i.e. coarse, intermediate and fine. Coarse class is directed to sensory separation to obtain tails and concentrate to be additionally ground and screened to intermediate and fine classes. Intermediate class is conveyed to metallurgical processing while fine class is subjected to pelletising. Hydrohematite ore is first subjected to screening with separation to three size classes, i.e. coarse, intermediate and fine. Coarse class is directed to sensory separation to obtain tails and concentrate to be additionally ground and screened to intermediate and fine classes. Intermediate class is conveyed to metallurgical processing. Portion of fine class is directed for pelletising while another portion is directed to magnetic separation, its magnetic fraction is fed for pelletising. Nonmagnetic fraction is ground with mixing by grinding medium and directed to hydraulic classification of the first stage. Classification sands are returned to the mill. Sink is fed to second stage of classification, its sink being used as 3rd grade pigment after thickening and drying. Sands of second classification are fed to second stage of grinding with mixing by grinding medium. Product ground at second stage is subjected to 3rd stage hydraulic classification, its sands being dried and used as 2nd grade pigment. Thereafter, sink is thickened, dried and used as 1st grade pigment.

EFFECT: simultaneous production of several grades of iron oxide pigment and finished stock for metallurgy.

2 cl, 1 dwg, 1 tbl

 

The invention relates to a method for integrated processing of iron ores and can be used to obtain natural (not synthetic) micaceous iron pigments that can be used in a special anti-corrosion primers used including for the needs of shipbuilding, with the simultaneous receipt of raw materials for the metallurgical industry in the form of briquettes. Also the method can be used to produce rare and very expensive brands of pigments, including transparent, for the needs of the pharmaceutical, cosmetic and food industry.

Known "Method of production of red iron oxide pigment (patent RU No. 2303046, publ. 20.07.2007). A method of obtaining a red iron oxide pigment includes oxidation of aqueous sulphate solutions or suspensions hydroxide iron (II) oxygen at steady-state values of temperature and pH of the reaction medium, hydrothermal heat treatment of the suspension of oxyhydroxide iron (III) in batch or continuous mode in autoclaves, washing of the pigment from the water-soluble salts, drying and grinding of the pigment. In the process of hydrothermal treatment on the FeOOH suspension effect of nanosecond electromagnetic pulses with the following characteristics: pulse duration from 0.5 to 5 NS, pulse amplitude 4-10 kV, frequency is the pulse repetition 200-1000 Hz, the process is carried out at a temperature of 130-200°C.

The main disadvantages of the method are the complexity and high cost of production of synthetic pigment, environmental harm in the process.

Known way to "Getting the iron sludge micron size class" (patent RU №2354672, publ. 10.05.2009). The invention relates to the production of iron oxide (III) lamellar structure, which can be used as a pigment. Natural mechanically crushed iron oxide (III), lamellar structure which is at least 50 wt.%, preferably 75 wt.%, contains particles smaller than 10 μm in the amount of at least 50 wt.%, preferably 70 wt.%, particularly preferably 90 wt.%. The ratio of the thickness to the maximum diameter of the plates of iron oxide (III) is 1:5, preferably 1:10. To obtain such iron oxide (III) mechanically ground in an impact mill or jet mill. The resulting mechanical grinding iron oxide (III) divided by the size of particles, for example, via an air separator.

The main disadvantages of the method in the difficulty of obtaining high-quality pigment on the proposed "dry" technology, low yield pigment

A method of obtaining natural red iron oxide pigment from ore (Kus is s V.B. have been, Kuskov AV "Development of technology for micaceous iron pigments". Metallurgist, No. 3, 2010, p.70-72)adopted for the prototype. Crushed iron ore is subjected to magnetic separation with separation into magnetic and nonmagnetic fractions, non-magnetic fraction was pulverized and classified in 4 stages, including the main classification, the first perekisnoe, the first control and the second control gidrotsiklonirovanija with the Department of Sands primary classification. Then drain subjected to oxidative degradation, concentrated and dried with simultaneous disintegration and air classification of pigment.

The main disadvantages of this method is the inability to obtain several varieties, in particular high-quality, pigment, relatively low yield of the pigment, the relatively high cost of ore processing. In addition, the magnetic fraction and Sands main classifications are not suitable for metallurgical processing.

The technical result of the invention is to improve the quality of the finished pigment, obtaining several varieties of pigment, getting ready raw material for the metallurgical industry, reducing the cost of processing.

The technical result is achieved by a method for integrated processing of extracted-hydrogenative ore includes screening ore,magnetic separation to obtain the magnetic and nonmagnetic fractions, grinding, hydraulic classification, thickening and drying, with martite ore is first subjected to screening divided into three size - large, medium, small, large class is directed to sensor separation with getting tailings and concentrate, which dotablevota and share the screening at the intermediate and small classes, intermediate class is delivered to the metallurgical processing, small class send for briquetting, hydrohematite ore also subjected to screening divided into three size - large, medium, small, large class is directed to sensor separation with getting tailings and concentrate, which dotablevota and split screening on intermediate and small classes, intermediate class is delivered to the metallurgical processing, part of a small class guide for briquetting, the other part is directed to magnetic separation, magnetic fraction which is fed to the briquetting, the non-magnetic fraction is crushed with stirring grinding medium and is directed to hydraulic classification first stage, Sands classification are returned to the mill discharge is fed to the second stage of classification, plums which after evaporation and drying is used as the pigment of the third grade, Sands sec is th classification served on the second stage of grinding with stirring grinding medium, crushed in the second stage, the product is subjected to hydraulic classification of the third stage, the Sands of which is thickened, dried, and used as the pigment of the second grade, drain concentrated, dried, and used as the pigment of the first grade.

Martite ore can be divided into classes of size larger than 80 mm, 80-5 mm and smaller than 5 mm, hydrohematite ore in classes larger than 150 mm, 150-5 mm and smaller than 5 mm

Screening allows to allocate the intermediate size class, suitable for direct metallurgical processing without pre-crushing of ore, which reduces the cost of processing.

Touch separation allows you to select final tailings, which also reduces the cost of processing, since further processing comes already not the whole large class, but only part of it. In addition, the quality of the product supplied for further processing (concentrate), is brought to the standard.

The recrushing of the concentrate of a large class with its subsequent screening, allows you to fabricate the intermediate size class, suitable for metallurgical processing, and small class for briquetting.

Briquetting small class size meticulou ore together with small class hydrohematite ore and magnetic fraction cycle pigment production allows to obtain vysokokachestvennaya, suitable for metallurgical processing.

Grinding in two stages in the mills with peremestivsheesya grinding medium (mills fine and ultrafine grinding and multi-stage classification allows to obtain very fine pigment in several varieties.

Magnetic separation allows for the magnetic fraction greater part depigmented" minerals, which have a higher unit magnetic susceptibility than the "pigment" minerals.

Division meticulou ore into classes of size larger than 80 mm, 80-5 mm and smaller than 5 mm, due to the fact that the maximum particle size meticulou ore arriving at the blast processing, should be no more than 80 mm Class smaller than 5 mm should be in the blast furnace charging as little as possible, because this class significantly impairs the performance of the blast furnace process.

Division hydrohematite ore into classes of size larger than 150 mm, 150 -5 mm and smaller than 5 mm is due to the fact that the maximum particle size hydrohematite ore arriving at the blast processing, should be no more than 150 mm Class smaller than 5 mm should be in the blast furnace charging as little as possible, because this class significantly impairs the performance of the blast furnace process.

The method is as follows - 1. Source martite ore during the screening I tbsp. divided into three size class: large, intermediate, Elke.

A large class is directed to sensor separation, during which emit final tailings and concentrate. Concentrate dotablevota particle size up to intermediate class and subjected to screening II century to highlight the small class, which is directed to briquetting.

Intermediate class obtained during the screening of the I century (together with the intermediate class, obtained during screening Art. II), shall be used for direct metallurgical processing.

Small class obtained during screening Art. I (together with small class obtained during screening Art. II), shall be used for briquetting.

Source hydrogenation ore during screening Art. I also divided into three size class: large, intermediate, small.

A large class is directed to sensor separation, during which emit final tailings and concentrate. Concentrate dotablevota particle size up to intermediate class and subjected to screening II century to highlight the small class, which is directed to briquetting.

Intermediate class obtained during the screening of the I century (together with the intermediate class, obtained during screening Art. II), shall be used for direct metallurgical processing.

Part of a small class, obtained during screening Art. I(together with small class obtained during grohote the s II century), sent for briquetting. The other part comes in the cycle of production of a pigment.

The cycle of production of a pigment include magnetic separation, during which emit magnetic fraction entering the briquetting (together with small fractions obtained by screening).

The nonmagnetic fraction is fed to the grinding stage I, which operates in closed circuit with classification. Sands classification are returned to the grinding stage I, plums I served on the classification stage II. During the classification stage II get plums II, which is thickened, dried, resulting in a pigment 3 varieties.

Sands classification stage II is directed to the grinding stage II. The crushed product is subjected to classification stage III, thus receive Sands III, which is thickened, dried, resulting in a pigment 2 varieties. Also get plums IV, which is thickened, dried, resulting in a pigment 1st grade.

The number of stages of grinding and classification may be different depending on the properties of the original ore and requirements of the consumer of the finished product. Also different can be a number of varieties of pigment. Depending on the properties of the feedstock stage I classification may be open. Then the Sands of the classification guide for briquetting together with classes - 5 mm

Example. Use martitegui hydrogenation iron ore Yakovlevsky mine. The pilot batch of pigment and briquettes of iron ore.

Source martite ore, particle size 200-0 mm delivered to double-deck sambalanco thunder (stage I screening) are divided into three size class: - 200+80 mm - 80+5 mm - 5 mm

Class - 200+80 mm share on the touch separator company TOMRA Sorting Solutions to final tailings and concentrate. Concentrate crushed in a jaw crusher to 80 mm Crushed product on sambalanco thunder (stage II screening) diffuse into classes - 80+5 mm - 5 mm, Class 80+5 mm combined with class - 80+5 mm, obtained in the first stage of screening, and sent to the blast processing.

Class - 5 mm combined with class - 5 mm, obtained in stage I screening, and sent for briquetting.

Source hydrogenation ore, particle size 250 - 0 mm delivered to double-deck sambalanco thunder (stage I screening) are divided into three size class: - 250+150 mm - 150+5 mm - 5 mm

Class - 250+150 mm share on the touch separator company TOMRA Sorting Solutions to final tailings and concentrate. Concentrate crushed in a jaw crusher to 150 mm Crushed product on sambalanco thunder (stage II screening) diffuse into classes - 150+5 mm - 5 mm, Class - 150+5 mm combined with class - 150+5 mm, obtained in the first stage of screening and sent to the blast processing.

Class - 5 mm combined with class - 5 mm, obtained in stage I, g is Chechenia, combined with the class - 5 mm and the part is placed on the production of pigment. Another part combined with the class - 5 mm, obtained from meticulou ore, and send for briquetting.

For the production of pigment grade - 5 mm from hydrohematite ore is subjected to magnetic separation. Magnetic fraction containing mainly "depigmented" minerals, combined with classes - 5 mm allocated for briquetting.

The nonmagnetic fraction is fed to the grinding stage I at the mill Metso VERTIMILL. The crushed product is classified in the hydrocyclone, Sands returned to the mill. Plums I arrives at the second stage classification hydrocyclone. Drain II is condensed, dried and shipped to the consumer as a pigment 3 varieties. Sands II stage classification is crushed in a mill Metso SMD and sent to the classification of stage III in the hydrocyclone.

Sands III of the classification stage III concentrated, dried and shipped as pigment 2 varieties. Plums also condensed, dried and shipped as a pigment 1st grade.

Technological parameters on the obtained pigment shown in table 1

Briquetting classes - 5 mm with the addition of the magnetic fraction is produced in a roll press. Pre-material mixed with the binder. Briquettes were made of size 26×20×12 mm

The resulting briquettes were available for the for metallurgical processing as a component domain of a charge.

Thus, the method expands its capabilities and improves the quality of the finished pigment, to get several varieties of pigment, to get ready the materials for the steel industry to reduce the cost of processing.

№ PR-tName of productOutput %The particle size, micronsRate, g/m2
8Class - 5 mm after screening II2,6
9Class 80+5 mm after screening II5,2
7Class - 80 after crushing7,8
6The touch concentrate separation7,8
5Tails touch separation 6,9
2Class+80 after the screening I14,7
3Class 80+5 after the screening I18,3
10Classes -80+5 after the screening I and II23,5
4Class - 5 after the screening I29,4
11Classes - 5 mm after the screening I and II32,0
1Total: source martite ore62,4
33Sands III (Pigment grade 2)2,5159
34Drain IV (Pigment grade 1)2,276
32Product grinding IIthe 4.7
31Drain II (Pigment grade 3)2,42415
30Sands IIthe 4.7
29Plums I7,1
28Sands I7,2
27The product of grinding I14,3
26Food grinding I14,3
24 The nonmagnetic fraction7,1
25Magnetic fraction2,4
23Power magnetic separation9,5
22Hydrogenative ore for briquettingthe 5.7
19Class - 5 mm after screening II1,4
20Class - 150+5 mm after screening II3,7
21Classes -150+5 after the screening I and II19,3
18Crushed product5,1
17The touch concentrate separation5,1
16Tails touch separation3,1
13Class+150 after the screening I8,2
14Class - 150+5 mm after the screening Ithe 15.6
15Class - 5 mm after the screening I13,8
12Total: source hydrogenative ore37,6
Total: ore100,0

1. Method for integrated processing of extracted-hydrogenative ore, on the expectation screening ore, magnetic separation with obtaining magnetic and nonmagnetic fractions, grinding, hydraulic classification, thickening and drying, characterized in that martite ore is first subjected to screening divided into three size - large, medium, small, large class is directed to sensor separation with getting tailings and concentrate, which dotablevota and share the screening at the intermediate and small classes, intermediate class is delivered to the metallurgical processing, small class send for briquetting, hydrohematite ore also subjected to screening divided into three size - large, medium, small, large class guide on the touch separation of obtaining tailings and concentrate, which dotablevota and share the screening at the intermediate and small classes, intermediate class is delivered to the metallurgical processing, part of a small class guide for briquetting, the other part is directed to magnetic separation, magnetic fraction which is fed to the briquetting, the non-magnetic fraction is crushed with stirring grinding medium and is directed to hydraulic classification first stage, Sands classification are returned to the mill discharge is fed to the second stage of classification, discharge to the Torah after evaporation and drying is used as the pigment of the third grade, Sands the second classification is served on the second stage of grinding with stirring grinding medium, crushed in the second stage, the product is subjected to hydraulic classification of the third stage, the Sands of which is thickened, dried, and used as the pigment of the second grade, drain concentrated, dried, and used as the pigment of the first grade.

2. The method according to claim 1, characterized in that martite ore divided into classes of size larger than 80 mm, 80-5 mm and smaller than 5 mm, hydrohematite ore divided into classes larger than 150 mm, 150-5 mm and smaller than 5 mm



 

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2 tbl, 6 ex

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FIELD: chemistry.

SUBSTANCE: invention can be used to produce magnesium chloride, silica and red pigment. Serpentinite calcined at 680-750°C is treated with 4-8% hydrochloric acid solution with weight ratio of serpentinite to hydrochloric acid equal to 1:(15-40). The hot pulp is then decanted and filtered. The residue is dried to obtain silica, the filtrate is evaporated and silicic acid is separated. After separating silicic acid in form of sol-gel, hydrochloric acid is added to a solution containing magnesium and iron (III) chlorides until 4-8% hydrochloric acid solution is obtained. The obtained hydrochloric acid solution is used to treat a new portion of serpentinite. Further, the decantation, filtration, evaporation of filtrate, separation of silicic acid and treatment of the obtained solution with hydrochloric acid are repeated 3-5 times using new portions of calcined serpentinite. The solution concentrated that way at 90°C is mixed with serpentinite and filtered. Magnesium chloride is separated from the residue which contains iron (III) hydroxide. Said residue is treated at 350-400°C to obtain red pigment.

EFFECT: invention simplifies the processing serpentinite, improves environmental safety and reduces expenses and wastes.

1 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: to prepare iron oxide pigments, wastes formed during hydraulic borehole mining for iron ore in form of mud containing martite, iron mica, goethite, magnetite and chamosite are mixed with a superplasticiser in ratio of 1:0.05 and wet grinding is carried out. Thermal treatment is then carried out for 1-1.5 hours at 100-150°C and next grinding is carried out in a disintegrator to obtain a 0.8-1.0 mcm fraction of the composition. The obtained iron oxide pigment has a brick-red colour, density of 4.42 g/cm3 and low oil consumption.

EFFECT: invention enables recycling of mining wastes and reduces power consumption.

1 ex

FIELD: electricity.

SUBSTANCE: disclosed is a soluble precursor-derived composite oxide of the formula SrFe12O19 for use as an active substance for composite material of the positive electrode of a lithium battery, consisting of binding material, a current-conducting agent and active substance. A desired phase with different controlled particle sizes can be obtained by varying calcination temperature conditions. Selection of the particle size enables to optimise operational parameters of the battery. Maintaining the structure during discharge (lithium embedding) enabled to use up to 80-100% theoretical capacity of said material. Specific theoretical capacity is 303 mAh/g.

EFFECT: full utilisation of the material.

8 cl, 1 tbl, 6 dwg

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