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Comprehensive treatment method for waste fused salts and dust collection slag produced through titanium tetrachloride fused salt chlorination

A technology of molten salt chlorination and titanium tetrachloride, which can be used in the removal of solid waste and other directions, can solve problems such as environmental pollution, and achieve the effect of reducing huge pressure, improving industrial application prospects, and solving recycling problems.

Inactive Publication Date: 2015-07-15
GUIYANG AL-MG DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to propose a comprehensive treatment method for waste molten salt and dust collection slag produced by the chlorination of titanium tetrachloride molten salt, to achieve the purpose of resource recovery and utilization, and to solve the problem of titanium tetrachloride production. Environmental pollution problems caused by waste molten salt and dust collection slag produced in the

Method used

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  • Comprehensive treatment method for waste fused salts and dust collection slag produced through titanium tetrachloride fused salt chlorination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, a comprehensive treatment method for the chlorination of titanium tetrachloride molten salt to produce waste molten salt and dust collection slag: First, the waste molten salt discharged from the molten salt chlorination furnace is crushed by a jaw crusher, and the The processed broken slag is pulverized to 80 mesh with a grinder; the dust collection slag produced during the production of molten salt chlorination is slurried and dispersed at room temperature 20 ℃, and prepared into a solid-liquid mixture; mixed waste molten salt grinding powder with solid-liquid The mixture is prepared by mixing the ingredients of the dust collecting slag into a mixture. The mass ratio of the waste molten salt slag and the dust collecting slag is 1.5:1; the mixture is oxidized and roasted under the atmosphere of air and water vapor. The oxidation roasting equipment is a tunnel In the kiln, the oxidation roasting temperature is 600℃, the oxidation roasting time ...

Embodiment 2

[0035] Such as figure 1 As shown, a comprehensive treatment method for the chlorination of titanium tetrachloride molten salt to produce waste molten salt and dust collection slag: First, the waste molten salt discharged from the molten salt chlorination furnace is crushed by a jaw crusher, and the The crushed slag after treatment is pulverized to 100 mesh with a mill; the dust collection slag generated during the production of molten salt chlorination is slurried and dispersed at room temperature 20 ℃ to prepare a solid-liquid mixture; the waste molten salt grinding powder is mixed with solid-liquid The mixture is prepared by mixing the ingredients of the dust collection slag into a mixture. The mass ratio of the waste molten salt slag and the dust collection slag is 1:1; the mixture is oxidized and roasted under the atmosphere of air and water vapor, and the oxidation roasting equipment is flamed back In the kiln, the oxidation roasting temperature is 700℃, the oxidation roas...

Embodiment 3

[0037] Such as figure 1 As shown, a comprehensive treatment method for the chlorination of titanium tetrachloride molten salt to produce waste molten salt and dust collection slag: First, the waste molten salt discharged from the molten salt chlorination furnace is crushed by a jaw crusher, and the The crushed slag after treatment is pulverized to 160 mesh with a grinder; the dust collection slag produced during the production of molten salt chlorination is slurried and dispersed at room temperature 20 ℃ to prepare a solid-liquid mixture; the waste molten salt grinding powder is mixed with solid-liquid The mixture is prepared by mixing the ingredients of the dust collection slag into a mixture. The mass ratio of the waste molten salt slag and the dust collection slag is 1:1; the mixture is oxidized and roasted under the atmosphere of air and water vapor, and the oxidation roasting equipment is flamed back In the kiln, the oxidation roasting temperature is 400°C, the oxidation r...

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Abstract

The present invention discloses a comprehensive treatment method for waste fused salts and dust collection slag produced through titanium tetrachloride fused salt chlorination. The method comprises that: waste fused salts discharged from a fused salt chlorination furnace are crushed, and the crushed slag is subjected to powder grinding; dust collection slag is subjected to beating diffusion to achieve a solid-liquid mixing state; the waste fused salt powder and the solid-liquid mixing state dust collection slag are uniformly mixed into a mixed material; the mixed material is subjected to oxidation calcination under the atmosphere condition of introduction of air and water vapor, the generated hydrogen chloride and the generated chlorine gas pass through a leaching system to generate hydrochloric acid, and the generated waste gas achieves the standard emission; and the calcined caking slag is subjected to crushing screening, an alkali liquid neutralization treatment is performed, and part of the chloride which is not completely removed reacts with an alkali liquid so as to generate the corresponding hydroxide and the corresponding salt water. According to the present invention, the environmental hazards caused by the waste fused salts and the dust collection slag are reduced, the chlorine ions and partial valuable elements in the waste fused salts and the dust collection slag are recovered, and the treated slag with the wide use is obtained.

Description

Technical field [0001] The invention relates to a comprehensive treatment method for waste molten salt produced by chlorination of titanium tetrachloride molten salt and dust collection slag. Background technique [0002] Molten salt chlorination is to immerse titanium slag and petroleum coke in molten salt medium (mainly composed of KCl, NaCl, MgCl 2 , And CaCl 2 In the composition), it chemically reacts with the introduced chlorine gas to generate TiCl 4 . Its main advantage is that it can process raw materials with high calcium and magnesium oxide content; its disadvantage is that it produces a large amount of waste molten salt and dust collection slag. Most of these solid wastes are currently stacked in the open and difficult to handle. [0003] In the process of molten salt chlorination, the chlorination temperature, chlorine rate, particle size and porosity of the material, carbon content, chlorine concentration, ratio of material to chlorine and the composition of the molten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
Inventor 路辉
Owner GUIYANG AL-MG DESIGN & RES INST
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