Precise processing process of fluorite powder

A fluorite powder and process technology, applied in the direction of calcium/strontium/barium halide, calcium/strontium/barium fluoride, etc., can solve the problems of small profit margin, tail throwing loss, waste of resources, etc., and achieve easy operation and simple equipment. , the effect of small particle size change

Active Publication Date: 2014-02-12
FUXIN JINSHENG ENVIRONMENTAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Fluorite powder with a calcium fluoride content of more than 97% is an acidic chemical grade fluorite powder used in the production of hydrofluoric acid. The traditional fluorite powder flotation production process used in patents CN87105202, CN1063058, and CN101712014 uses sodium carbonate and water glass as regulators. Use oxidized paraffin soap or oleic acid as collector, heat to 30~40℃, flotation fluorite fine powder, domestic high-grade fluorite ore is basically mined, now mainly use low-grade fluorite ore to produce fluorite fine powder , but more than 97% of fluorite fine powder is flotation from low-grade fluorite ore, the tailing loss is serious, a large amount of resources are lost, the cost is high, and the profit margin is small. Generally, the fluorite powder content of flotation is about 90% (85 %~95%), containing high silicates and calcium carbonate components, which cannot meet the requirements of acidic chemical grade fluorspar powder. This kind of fluorspar powder is generally used in smelting, manufacturing ceramics, glass manufacturing and other industries. a waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1, put 10Kg of fluorite powder containing 93.58% into the reactor, add 5Kg of 40% hydrofluoric acid aqueous solution, stir for 10 minutes, put it into the sedimentation tank and let it stand for 10 hours, then filter, and recover the filtered liquid Utilize, solid is rinsed with the clear water of 20Kg, and the pH value of the aqueous solution after washing is 6. The solid is transferred to the neutralization tank, and 10Kg of saturated calcium hydroxide solution is added to soak for 10 hours and then filtered. The filtered solid is then rinsed with 6Kg of water until the pH value of the washed aqueous solution is 8. Dry at ℃ for 2 hours to obtain 9.23Kg of fluorite powder. The calcium fluoride content is 99.10% after testing. The particle size of the fluorite powder is different. The specific particle size is shown in Table 1.

[0011] Table I

[0012] sample total +100 mesh 100~150 mesh 150~200 mesh 200~250 mesh 250~300 mesh -300 mesh ...

Embodiment 2

[0014] Take 1Kg of fluorite powder containing 93.58%, put it into the reactor, add 1Kg of 20% hydrofluoric acid aqueous solution, stir for 10 minutes, put it in the sedimentation tank and let it stand for 10 hours, then filter it, recycle the filtered liquid, and use 2Kg of solid Rinse with clear water, the pH value of the washed aqueous solution is 6. The solid is transferred to the neutralization tank, add 1Kg saturated calcium hydroxide solution to soak for 10 hours and then filter, and the filtered solid is then rinsed with 1Kg clear water until the pH of the washed aqueous solution is The value is 8. Put the solid in a drying oven and dry at 110°C for 2 hours to obtain a product of 0.93Kg. After testing, the calcium fluoride content is 97.51%. The particle size of the fluorite powder is different. The specific particle size is shown in Table 2.

[0015] Table II

[0016] sample total +100 mesh 100~150 mesh 150~200 mesh 200~250 mesh 250~300 mesh -300...

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PUM

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Abstract

The invention belongs to the processing process of chemical products, and particularly relates to a precise processing process of fluorite powder. The processing process comprises the following steps: weighing 1000 parts of fluorite powder with the content of calcium fluoride of 85-95wt% at a normal temperature within 0-40 DEG C, wherein the content of barite does not exceed 0.6%; placing in a reaction container; adding 300-3000 parts of acidic liquor containing 10-50% of hydrogen fluoride; uniformly mixing a fluorite powder slurry; guiding the discharge material to a standing pool for standing for 1-24 hours; filtering by a filter; recycling the filtered liquid; spraying the filtered solids by 300-3000 parts of clean water; transferring the cleaned solids to a neutralization pond; adding 300-3000 parts of alkaline liquor, wherein the liquor is alkali and the pH value is 10-14; filtering again; spraying by 300-3000 parts of clean water after filtration, wherein the PH value of cleaned water liquor is 7-9; and transferring the cleaned solids to a drying furnace, wherein the content of calcium fluoride in high purity fluorite powder through detection is not less than 97%. The precise processing process of the fluorite powder is simple in process flow, easy to operate, simple in production equipment and low in investment cost.

Description

technical field [0001] The invention belongs to the processing technology of chemical products, in particular to a finishing technology of fluorite powder. Background technique [0002] Fluorite powder with a calcium fluoride content of more than 97% is an acidic chemical grade fluorite powder used in the production of hydrofluoric acid. The traditional fluorite powder flotation production process used in patents CN87105202, CN1063058, and CN101712014 uses sodium carbonate and water glass as regulators. Oxidized paraffin soap or oleic acid is used as collector, heated to 30~40°C, flotation fluorite fine powder, the domestic high-grade fluorite ore is basically mined, and now the low-grade fluorite ore is mainly used to produce fluorite fine powder , but more than 97% of fluorite fine powder is flotation from low-grade fluorite ore, the tailing loss is serious, a large amount of resources are lost, the cost is high, and the profit margin is small. Generally, the fluorite powd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/22
Inventor 王世勋徐国政许国峰
Owner FUXIN JINSHENG ENVIRONMENTAL SCI & TECH
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