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Method for obtaining titanium ore concentrate through floatation from titanium pigment acidolysis waste material by sulfate process

A technology of titanium concentrate and sulfuric acid method, applied in flotation, solid separation, etc., can solve the problems of difficulty in obtaining, fine particle size, waste, etc., and achieve the effect of reducing pollution and realizing reuse

Inactive Publication Date: 2010-06-02
周建国
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the method of domestic production of titanium dioxide is mainly the sulfuric acid method: finely ground titanium concentrate (or high titanium slag, a mixture of titanium concentrate and high titanium slag) is acidified by sulfuric acid, hydrolyzed, and calcined to obtain titanium dioxide. Most of the sulfuric acid acid hydrolysis waste is disposed of by landfill, which not only pollutes the environment but also causes a waste of resources
[0003] Sulfuric acid acid hydrolysis waste mainly contains raw materials not acid hydrolyzed, CaSO 4 , MgSO 4 、H 2 SO 4 And some impurities, due to the characteristics of high sulfuric acid content, low pH value (pH ≤ 0.5), many solid impurities (including sand, impurities generated in the production process, etc.), fine particle size (-325 mesh accounts for more than 80%), etc., It is difficult to obtain qualified TiO-containing 2 ≥47%, titanium concentrate containing ≤0.2% sulfur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A titanium dioxide factory uses titanium concentrate as raw material to prepare titanium dioxide. The waste generated during the acidolysis process mainly contains: raw materials without acidolysis, CaSO 4 , MgSO 4 , H 2 SO 4 and some impurities.

[0018] Disperse 1t of waste with high-pressure water, and remove most of the solid impurities such as sand and gypsum residue in the waste through two layers of acid-resistant screens (sieve size 3mm in diameter). Introduce the slag-separated pulp into the sedimentation tank, add 3t of clean water, and at the same time add 0.2kg of NaOH to make the pH value reach 1.5. Filter the pulp again with an acid-resistant screen (sieve size 3mm in diameter), add 1t of clean water, and at the same time add 0.1kg of NaOH to make the pH of the pulp reach 3.6, and remove solid impurities as much as possible.

[0019] 100kg of titanium-containing medium (titanium ore containing TiO) 2 45%, S0.2% ~ 0.8%, medium particle size -200 mesh ≥...

Embodiment 2

[0023] A titanium dioxide factory uses high-titanium slag as raw material to prepare titanium dioxide. The waste generated during the acidolysis process mainly contains: raw materials without acidolysis, CaSO 4 , MgSO 4 , H 2 SO 4 and some impurities.

[0024] Disperse 1t of waste with high-pressure water, and remove most of the solid impurities such as sand and gypsum residue in the waste through two layers of acid-resistant screen (sieve size 5mm in diameter). Introduce the slag-separated pulp into the sedimentation tank, add 1t of clean water, and at the same time add 0.4kg of CaCO 3 , bringing its pH to 1.5. Filter the pulp again through an acid-resistant screen (sieve size 5mm in diameter), add 2kg of clean water, and at the same time add 0.15kg of CaCO 3 , so that the pH value of the pulp reaches 3, and at the same time, the solid impurities are removed as much as possible.

[0025] The slurry enters the inclined narrow flow thickener to stabilize the flotation des...

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PUM

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Abstract

The present invention relates to a mineral separation process that the titanium ore concentrate is obtained from the sulfate process titanium dioxide acidolysis waste material with the titanium-containing medium floatation, specifically the titanium dioxide acidolysis waste material is adopted with the methods of adding water, adding alkali or simultaneously adding water and alkali to reduce the acid-containing amount of the waster material in the processes of deposition and compression, the routine floatation machines of machinery stirring flotation machine, etc. are adopted, the pH value ofthe counterfloatating desulfurizing is controlled from 3.5 to 5, and the pH value in the titanium ore floatation is controlled from 5.0 to 5.8, the added titanium-containing medium can be added beforethe floatation desulfurizing and can be added after the floatation desulfurizing and before the titanium ore floatation. The eligible titanium ore concentrate (TiO2>=47%, sulfur<=0.2%) can be obtained with the method of the invention, and the recovery coefficient of the TiO2 in the acidolysis waste material is more or equal to 60%. The invention can realize the reusing of the resource and the environment pollution is reduced.

Description

technical field [0001] The invention relates to a method for obtaining titanium concentrate by flotation of titanium dioxide acid hydrolysis waste by sulfuric acid method, in particular to a beneficiation method for obtaining titanium concentrate by medium flotation of titanium dioxide acid hydrolysis waste by sulfuric acid method method. Background technique [0002] At present, the main method for producing titanium dioxide in China is the sulfuric acid method: the titanium dioxide is obtained by acid hydrolysis, hydrolysis and calcination of finely ground titanium concentrate (or high titanium slag, a mixture of titanium concentrate and high titanium slag) with sulfuric acid. Most of the sulfuric acid acid hydrolysis waste is disposed of by landfill, which not only pollutes the environment but also causes waste of resources. [0003] Sulfuric acid acid hydrolysis waste mainly contains unacid hydrolyzed raw materials, CaSO 4 , MgSO 4 , H 2 SO 4 and some impurities, du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03B1/00B03B1/04B03D103/02
Inventor 周建国
Owner 周建国