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Comprehensive utilization method of titanium-containing waste residues

A technology of titanium waste slag and titanium dioxide, which is applied in the field of comprehensive utilization of titanium-containing waste slag, can solve environmental pollution and other problems, and achieve the effects of solving environmental pollution, no secondary pollution, and reducing consumption of raw materials and water

Inactive Publication Date: 2011-03-23
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for comprehensive utilization of titanium-containing waste slag to solve the problem of environmental pollution and make full use of titanium and aluminum resources.

Method used

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  • Comprehensive utilization method of titanium-containing waste residues
  • Comprehensive utilization method of titanium-containing waste residues
  • Comprehensive utilization method of titanium-containing waste residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Crushing and grinding: the titanium-containing waste residue containing 4% by weight of titanium dioxide is crushed and ground to obtain a powder with a diameter of 50 μm;

[0027] (2) Mixing: According to the weight ratio of titanium-containing waste residue powder: ammonium sulfate: potassium sulfate=1:4:8, weigh the raw materials, mix the titanium-containing waste residue powder with ammonium sulfate, and then mix it with potassium sulfate evenly;

[0028] (3) Melting: raise the temperature of the above mixed material to 370°C and keep it warm for 50 minutes to obtain massive solid and ammonia gas;

[0029] (4) Dissolving and filtering: Dissolve the above massive solid in water, then filter to obtain the filtrate and residue, the water-soluble titanium in the filtrate accounts for 97.1% of the total weight of titanium in the titanium-containing waste residue, and the water-soluble aluminum accounts for 97.1% of the total weight of titanium in the titanium-containi...

Embodiment 2

[0034] (1) Crushing and grinding: the titanium-containing waste residue containing 33% by weight of titanium dioxide is crushed and ground to obtain a powder with a diameter of 150 μm;

[0035] (2) Material mixing: according to the weight ratio of titanium-containing waste residue powder: ammonium sulfate: potassium sulfate=1:12:5, weigh the raw materials, mix the titanium-containing waste residue powder with ammonium sulfate, and then mix with potassium sulfate evenly;

[0036] (3) Melting: raise the temperature of the above-mentioned mixed material to 480°C and keep it warm for 3 minutes to obtain massive solid and ammonia gas;

[0037] (4) Dissolving and filtering: Dissolve the above massive solid in water, and then filter to obtain the filtrate and residue. The water-soluble titanium in the filtrate accounts for 98.9% of the total weight of titanium in the titanium-containing waste residue, and the water-soluble aluminum accounts for 98.9% of the total weight of titanium in...

Embodiment 3

[0042] (1) Crushing and grinding: the titanium-containing waste residue containing 21% by weight of titanium dioxide is crushed and ground to obtain a powder with a diameter of 95 μm;

[0043](2) Weigh the raw materials according to the weight ratio of titanium-containing waste residue powder: ammonium sulfate: potassium sulfate = 1:9:2, mix the titanium-containing waste residue powder with ammonium sulfate, and then mix with potassium sulfate evenly;

[0044] (3) Melting: raise the temperature of the above mixed material to 240°C and keep it warm for 32 minutes to obtain massive solid and ammonia gas;

[0045] (4) Dissolving and filtering: Dissolve the above massive solid in water, and then filter to obtain the filtrate and residue. The water-soluble titanium in the filtrate accounts for 97.5% of the total weight of titanium in the titanium-containing waste residue, and the water-soluble aluminum accounts for 97.5% of the total weight of titanium in the titanium-containing was...

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Abstract

The invention relates to the technical field of environmental protection and particularly relates to a comprehensive utilization method of titanium-containing waste residues, comprising the following steps for realizing the technical scheme of, firstly, crushing and grinding: crushing and grinding the titanium-containing waste residues to obtain a powder with the diameter of 50-160 microns; secondly, mixing materials: mixing the titanium-containing waste residue powder and ammonium sulfate, and then uniformly mixing the mixture and potassium sulfate; thirdly, melting: raising the temperature of the uniformly mixed mixture to 200-500 DEG C, and keeping the temperature for 1-50 min to obtain a massive solid and ammonia; fourthly, dissolving and filtering: dissolving the massive solid in water and filtering to obtain filtrate and residues, wherein the residues are used as a cement additive; fifthly, precipitating titanium; and sixthly, precipitating aluminum. The invention has wide raw material source, not only solves the problem of environmental pollution caused by large titanium-containing waste residue discharge, but also reasonably utilizes resources of the titanium, the aluminum and the like, thereby achieving considerable environment benefit, social benefit and economic benefit.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a comprehensive utilization method of titanium-containing waste residue. Background technique [0002] The discharge of titanium-containing waste slag (including titanium-containing tailings and titanium-containing blast furnace slag) has caused the loss of a large amount of titanium resources and polluted the environment. Therefore, its utilization has become the focus of attention. Titanium-containing waste slag cannot be directly used in cement production, thus limiting its use. Since the end of the 1960s, Chongqing University and Panzhihua Iron and Steel Research Institute have used ferrosilicon containing 75% silicon as a reducing agent to produce silicon-titanium ferroalloy, which is used to replace ferro-titanium to produce low-titanium alloy steel. At the end of the 1980s, the production of TiCl from titanium-containing waste residue was completed. 4 ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C04B5/00C22B21/00C22B34/12
CPCY02P10/20
Inventor 薛向欣张悦杨合白丽丽
Owner NORTHEASTERN UNIV
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