A kind of method for preparing white carbon black

A technology of white carbon black and acid leaching residue, which is applied in the chemical industry, can solve the problems of high process cost and achieve the effects of simple and scientific process, cost reduction and low energy consumption

Active Publication Date: 2016-03-23
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Predecessors have also done a lot of research on the extraction of silicon from iron tailings. For example, the patent (application number 201110071373) studies the method of preparing nano-silica from iron tailings, but it has not been used in actual production. The reason is that it has not been considered from the perspective of comprehensive utilization of resources, and the process cost is too high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Alkali-added roasting: take 100g of Baiyun Obo tailings, add 130g of sodium hydroxide and mix well, and roast at a temperature of 350°C for 2 hours;

[0025] (2) Washing: Use ordinary industrial water to wash and filter the roasted and decomposed minerals, and wash the filter cake several times until the pH of the washing liquid is less than 9;

[0026] (3) Hydrochloric acid leaching: The Baiyan Obo ore decomposed by adding alkali and roasting is leached with hydrochloric acid, the concentration of hydrochloric acid is 3mol / L, the dosage of hydrochloric acid is 800mL, the leaching temperature is 85°C, and the time is 2h. Filter the slurry after hydrochloric acid leaching , and wash the filter cake once with 400mL hydrochloric acid to obtain hydrochloric acid leaching solution and acid leaching residue.

[0027] (4) Roasting with alkali and molten salt: Take 100g of acid leaching residue, add 130g of sodium hydroxide and 100g of molten salt and mix well, then roast a...

Embodiment 2

[0032] (1) Alkali-added roasting: take 100g of Baiyun Obo tailings, add 130g of sodium hydroxide and mix well, and roast at a temperature of 350°C for 2 hours;

[0033] (2) Washing: Use ordinary industrial water to wash and filter the roasted and decomposed minerals, and wash the filter cake several times until the pH of the washing liquid is less than 9;

[0034] (3) Hydrochloric acid leaching: The Baiyan Obo ore decomposed by adding alkali and roasting is leached with hydrochloric acid, the concentration of hydrochloric acid is 3mol / L, the dosage of hydrochloric acid is 800mL, the leaching temperature is 85°C, and the time is 2h. Filter the slurry after hydrochloric acid leaching , and wash the filter cake once with 400mL hydrochloric acid to obtain hydrochloric acid leaching solution and acid leaching residue.

[0035] (4) Roasting with alkali and molten salt: Take 100g of acid leaching residue, add 160g of sodium hydroxide and 100g of molten salt and mix well, then roast a...

Embodiment 3

[0040] (1) Alkali-added roasting: take 100g of Baiyun Obo tailings, add 130g of sodium hydroxide and mix well, and roast at a temperature of 350°C for 2 hours;

[0041] (2) Washing: Use ordinary industrial water to wash and filter the roasted and decomposed minerals, and wash the filter cake several times until the pH of the washing liquid is less than 9;

[0042] (3) Hydrochloric acid leaching: The Baiyan Obo ore decomposed by adding alkali and roasting is leached with hydrochloric acid, the concentration of hydrochloric acid is 3mol / L, the dosage of hydrochloric acid is 800mL, the leaching temperature is 85°C, and the time is 2h. Filter the slurry after hydrochloric acid leaching , and wash the filter cake once with 400mL hydrochloric acid to obtain hydrochloric acid leaching solution and acid leaching residue.

[0043] (4) Roasting with alkali and molten salt: Take 100g of acid leaching residue, add 200g of sodium hydroxide and 100g of molten salt and mix well, then roast a...

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PUM

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Abstract

The invention discloses a method for preparing white carbon black. Baiyun Obo ore or its tailings are roasted with alkali, and the roasted ore is washed with water. The washing liquid is used to recover the hydroxides of silicon, aluminum and alkali metals. Hydrochloric acid leaching, the leaching solution is a scandium-containing crude solution, which is used as a raw material for further extracting scandium, and the slag of acid leaching is the raw material of the present invention. Then dry and grind the acid leaching slag, alkali metal hydroxide and molten salt of the chloride system according to the mass ratio of 1.0:1.0~2.0:1.0, and roast it at 600℃~750℃. The acid leaching residue was soaked in water first and then washed to neutrality, and the washing liquid was used as mother liquor to prepare white carbon black by precipitation method. The process of the present invention is simple and scientific, and can efficiently extract silicon from the acid leaching slag of scandium enrichment prepared from Baiyun Obo Mine or its tailings to prepare white carbon black. The leaching rate is ≥ 90%, and other by-products can be recovered from the process. A method for comprehensively recovering silicon in Baiyun Obo tailings.

Description

technical field [0001] The invention relates to a method for preparing white carbon black, which belongs to the field of chemical industry. Background technique [0002] During the Second World War, silica began to be used in large-scale industrial production, mainly precipitated silica. It was found that the addition of silica can greatly improve and improve the performance of some materials. Precipitated silica is mainly Used as reinforcing agent for natural rubber and synthetic rubber, toothpaste friction agent and whitening of paper, silica can be used as reinforcing filler for natural rubber and synthetic rubber, synthetic resin additive, ink thickener, pigment in paint Anti-sedimentation agent, soft polishing agent for vehicles and metals, and anti-sedimentation agent in emulsifiers. It can also be used as a pesticide carrier and filler for light ink newsprint, as an abrasive in toothpaste, etc. This has greatly increased the demand for performance research and practi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12
Inventor 李梅高凯张栋梁柳召刚周富强郭财胜
Owner INNER MONGOLIA UNIV OF SCI & TECH
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