Resourceful treatment method for fused salt chlorination residues

A molten salt chlorination slag and treatment method technology, applied in the direction of titanium tetrachloride, titanium halide, process efficiency improvement, etc., can solve the problems of difficult industrial application, large material consumption, high cost, etc., to solve pollution problems, The process is simple and the effect of eliminating the development bottleneck

Active Publication Date: 2016-08-24
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention overcomes the deficiencies of the prior art and provides a method for recycling molten salt chlorinated slag, hoping to so

Method used

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  • Resourceful treatment method for fused salt chlorination residues
  • Resourceful treatment method for fused salt chlorination residues
  • Resourceful treatment method for fused salt chlorination residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The composition of the molten salt chlorinated slag crushed material to be recycled in this embodiment is shown in Table 1.

[0029] Table 1 Composition analysis results of molten salt chlorination slag

[0030]

[0031] Firstly, the molten salt chlorinated residue is leached to obtain a slurry, and then filtered to obtain the leachate and the leaching residue. The water quality analysis results of the leachate are shown in Table 2.

[0032] Table 2 Water quality analysis results of leachate

[0033]

[0034] The leaching residue is washed with water until the salt content is less than 1.0%, and the liquid-solid ratio is about 3.0:1 during washing. After washing, the final slag is obtained, and the final slag is buried. The final slag composition analysis results are shown in Table 3.

[0035] Table 3 Analysis results of final slag composition

[0036]

[0037] Purify the leaching liquid and molten salt chlorination tail gas containing NaCl, NaClO, Na 2 CO 3 The strong oxidizin...

Embodiment 2

[0049] The specific method for resource treatment of molten salt chlorinated slag in this embodiment is basically the same as that in Example 1, but the leachate is oxidized with the chlor-alkali plant waste liquid shown in Table 10, and the dosage ratio of the waste liquid is 0.87 times the volume of the leachate.

[0050] The composition of the molten salt chlorinated slag crushed material to be recycled in this embodiment is shown in Table 7.

[0051] Table 7 Composition analysis results of molten salt chlorinated slag

[0052]

[0053] The water quality analysis results of the leachate are shown in Table 8.

[0054] Table 8 Water quality analysis results of leachate

[0055]

[0056] The leaching residue was washed with tap water with a liquid-to-solid ratio of 3.0:1, and the final residue composition analysis results are shown in Table 9.

[0057] Table 9 Analysis results of final slag composition

[0058]

[0059] The leachate is oxidized with the waste liquid of the chlor-alkali pl...

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Abstract

The invention discloses a resourceful treatment method for fused salt chlorination residues. According to the method, high-oxidizability alkaline waste salt water generated through fused salt chlorination tail gas purification or chloro-alkali chemical industry tail gas absorption waste liquor is used for treating leachate of the fused salt chlorination residues so as to recover NaCl, magnesium chloride hexahydrate and ferro-manganese residues, and low-cost resourceful treatment for the fused salt chlorination residues is achieved. Waste is treated with waste, the pollution problem of the fused salt chlorination residues is solved, NaCl, MgCl2 and ferro-manganese raw materials in the fused salt residues are recovered and used, and the resourceful treatment method has good economic benefits, has great significance in eliminating development bottleneck of technology application of preparing TiCl4 through titanium residue fused salt chlorination, can be widely applied to domestic and overseas fused salt chlorination-magnesium thermal electrolysis titanium sponge and fused salt chlorination titanium sponge enterprises and has wide popularization prospects.

Description

Technical field [0001] The embodiment of the present invention relates to the technical field of titanium tetrachloride production and the field of environmental protection technology. More specifically, the embodiment of the present invention relates to a method for treating molten salt chlorination slag as a resource, which is the production of tetrachloride by chlorination of titanium slag molten salt. A process for low-cost and resource-based treatment of molten salt chlorinated slag produced in the process of smelting titanium provides a technical solution for the cleaning of the process of producing titanium tetrachloride by molten salt chlorination. Background technique [0002] Molten salt chlorination and boiling chlorination are the two major production methods of titanium tetrachloride. The titanium tetrachloride produced by molten salt chlorination accounts for 40% of the global annual production of titanium tetrachloride. Boiling chlorination has high requirements fo...

Claims

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Application Information

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IPC IPC(8): C01G23/02
CPCC01G23/022C01P2006/80B09B3/00C22B7/00C22B60/00Y02P10/20C22B7/006C22B34/1213
Inventor 刘昌林侯盛东阳露波张景垒夏建辉郑少华成勇査笑乐黄子良
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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