Graphite solid waste recycling method

A technology of resource utilization and graphite, applied in the direction of silicon oxide, silicon dioxide, etc., can solve the problems of graphite tailings occupying large land, air and water and soil pollution, easy to form dust, etc., to achieve easy large-scale or industrial automation production, mitigation Margin, easy-to-operate effect

Active Publication Date: 2022-01-28
凯盛石墨碳材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The accumulation of graphite tailings will occupy a large amount of land, and the silt-like tailings powder exposed on the ground will easily form dust when exposed to the wind, causing unwanted impact on surrounding agriculture and forestry
In addition, the volatilization and infiltration of beneficiation chemicals remaining in the tailings may cause serious pollution to the atmosphere and water and soil, resulting in soil pollution, land degradation, and vegetation destruction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Mechanically scrub the graphite tailings for 1 hour;

[0027] (2) Dry the scrubbed graphite tailings at 110°C for 4 hours, and then send them to a high-temperature kiln for calcination at a temperature of 650°C and a calcination time of 3 hours;

[0028] (3) Pour 400g of the calcined product into a cold water tank, then transfer it to a flotation machine, adjust the pH of the pulp to 2 with HCl, and then add 10mg of dodecylamine and 10mg of sodium petroleum sulfonate for reverse floating operation;

[0029] (4) Dry the flotation tailings (dry at 120°C for 4h) and transfer to the reaction kettle, add mixed acid (HCl:HNO 3 Volume ratio = 1:1), control liquid-solid ratio 3:1, acid leaching at 45°C for 6h;

[0030] (5) Wash the product after acid leaching until neutral with deionized water, and then dry it at 120°C for 2 hours;

[0031] (6) Send the dried product to a high-gradient magnetic separator for strong magnetic work, with a magnetic field strength of 1.1T;

...

Embodiment 2

[0034] (1) Mechanically scrub the graphite tailings for 0.2 hours;

[0035] (2) Dry the graphite tailings scrubbed in (1) at 120°C for 3 hours, and then send them to a high-temperature kiln for calcination at a calcination temperature of 700°C and a calcination time of 2 hours;

[0036] (3) Pour 500g of the product calcined in (2) into a cold water tank, then transfer it to a flotation machine, adjust the pH of the pulp to 3 with HCl, and then add 12mg of N-alkylpropylenediamine and 12mg of dodeca Sodium alkyl sulfonate for reverse floating operation;

[0037] (4) Dry the flotation tailings in (3) (dry at 130°C for 2 hours) and transfer to the reaction kettle, add mixed acid (HCl:HF volume ratio = 2:1), control the liquid-solid ratio 2.5:1, at 40 Pickling at ℃ for 7h;

[0038] (5) The product after acid leaching in (4) was washed with deionized water until neutral, and then dried at 110°C for 4 hours;

[0039] (6) Send the dried product in (5) to a high gradient magnetic se...

Embodiment 3

[0042] (1) Mechanically scrub the graphite tailings for 0.5 hours;

[0043] (2) Dry the graphite tailings scrubbed in (1) at 140°C for 2 hours, and then send them to a high-temperature kiln for calcination at a temperature of 750°C and a calcination time of 1.5 hours;

[0044] (3) Pour 300g of the product calcined in (2) into a cold water pool, then transfer to a flotation machine, pass H 2 SO 4 Adjust the pH of the pulp to 2, and then add 8 mg of octadecylamine and 8 mg of sodium cetyl sulfonate for defloating operation;

[0045] (4) Dry the flotation tailings in (3) (dry at 120°C for 3 hours) and transfer to the reaction kettle, add mixed acid (oxalic acid: HF volume ratio = 2.5:1), control the liquid-solid ratio 3.5:1, at 50 Pickling at ℃ for 8h;

[0046] (5) The product after acid leaching in (4) was washed with deionized water until neutral, and then dried at 130°C for 4 hours;

[0047] (6) Send the dried product in (5) to a high gradient magnetic separator for strong...

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Abstract

The invention relates to a graphite solid waste recycling method, which is characterized by comprising the following steps: (1) mechanically scrubbing graphite tailings for 0.2-1 hour; (2) feeding into a high-temperature kiln, and calcining at 650-900 DEG C for 1-3 hours; (3) after calcining, pouring into a cold water pool, then transferring to a flotation machine, adjusting the pH value of the ore pulp to 2-3 by using HCl or H2SO4, adding a collecting agent with the weight of 20-50g / t of the ore pulp, and carrying out reverse flotation operation; (4) drying the flotation tailings, transferring into a reaction kettle, and carrying out acid leaching for 4-8 h at a temperature of 30-80 DEG C; (5) washing with deionized water to be neutral, and drying at 110-150 DEG C for 2-4 hours; (6) after drying, feeding into a high-gradient magnetic separator, and carrying out strong magnetic operation, wherein the magnetic separation intensity is 1T-1.6 T; and (7) grinding the magnetic separation product into a white powder product with the particle size of 400-2500 meshes. According to the invention, the prepared quartz powder with the purity of 99-99.5% is uniform in particle size and stable in property, and can be used as filler to be applied to the industries of plastics, coatings, adhesives, rubber and the like.

Description

technical field [0001] The invention belongs to the field of resource utilization of solid waste, and relates to a method for resource recovery of graphite solid waste. [0002] technical background [0003] my country's annual output of crystalline graphite is more than 500,000 tons, and the resulting discharge of graphite tailings is more than 5 million. The mineral composition of graphite tailings generally includes: mica, feldspar, quartz, tremolite, diopside, garnet, calcite, rutile, pyrite, graphite, chlorite, epidote, kaolinite, monto Stone, ilmenite, sericite, etc., among which quartz is the most important mineral, with a general content of more than 60%. [0004] The accumulation of graphite tailings will occupy a large amount of land, and the silt-like tailings powder exposed on the ground will easily form dust when exposed to the wind, causing unwanted impact on surrounding agriculture and forestry. In addition, the volatilization and infiltration of beneficiatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
CPCC01B33/12C01P2006/80
Inventor 任东风文贵强陈涛李新雨李玉峰刘海东王文齐
Owner 凯盛石墨碳材料有限公司
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