Method for removing aluminum of aluminum powder vanadium-removing crude titanium tetrachloride mud

A technology of crude titanium tetrachloride and titanium tetrachloride, which is applied in the field of metallurgy, can solve the problems of high energy consumption, large environmental pollution, and high content of aluminum impurities, and achieve the effects of low energy consumption, simple operation, stable and efficient treatment

Inactive Publication Date: 2019-09-10
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention aims to solve the technical problems of high aluminum impurity content in the vanadium removal slurry of the existing coarse titanium aluminum tetrachloride powder, low separation efficiency of titanium tetrachloride and aluminum impurities, high energy consumption, and large environmental pollution.

Method used

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  • Method for removing aluminum of aluminum powder vanadium-removing crude titanium tetrachloride mud

Examples

Experimental program
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Effect test

Embodiment 1

[0044] For containing AlCl 3 Titanium tetrachloride mud with an impurity content of 3.58% is hydrolyzed, and the main composition of the material before hydrolysis is TiCl 4 , the impurity compositions are: FeCl 3 0.21%, AlCl 3 3.58%, VOCl 2 1.28%, TiCl 3 1.2%, and its solid content is 134g / L; the total amount of hydrolyzed materials in the hydrolysis tank is 19.5t, the controlled water addition is 40kg, and the hydrolysis time is 60min. During the hydrolysis process, the water is added mainly through the flow of mud in the hydraulic jet pump The generated negative pressure is automatically sucked into the hydrolysis tank, and the material after hydrolysis is directly discharged to the primary settling tank for settlement. The settling tank equipment is a thickener, and the settling time is set to 18 hours. (accounting for about 3 / 4 of the total sedimentation material) was discharged into the secondary settling tank and continued to settle for 8 hours, and the supernatant ...

Embodiment 2

[0049] For containing AlCl 3 Titanium tetrachloride slurry with an impurity content of 5.48% is hydrolyzed, and its main composition is TiCl 4 , the impurity compositions are: FeCl 3 0.36%, AlCl 3 5.48%, VOCl 2 1.76%, TiCl 3 It is 1.54%, and its solid content is 230g / L; the total amount of double hydrolyzed materials in the hydrolysis tank is 20t, the controlled water addition is 45kg, and the hydrolysis time is 60min. After hydrolysis, the settling time of the primary settling tank is 20h. After 20 hours, discharge the upper clear liquid of the primary settling tank into the secondary settling tank for 12 hours of further sedimentation, sample and analyze the upper clear liquid after the primary and secondary settling, and establish the impurity AlCl in the clear liquid titanium tetrachloride. 3 content, and the results are shown in Table 2.

[0050] Impurity composition before and after sedimentation in Table 2 Example 2

[0051] FeCl 3 / %

[0052] After ...

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Abstract

The invention discloses a method for removing aluminum of aluminum powder vanadium-removing crude titanium tetrachloride mud, and belongs to the technical field of metallurgy. In order to solve the the technical problems of a high content of aluminum impurities, a low separation efficiency of the aluminum impurities, high energy consumption, large environmental pollution and the like of existing aluminum powder vanadium-removing crude titanium tetrachloride mud, the invention provides a method for removing aluminum. The method comprises the steps: adding water to the aluminum powder vanadium-removing crude titanium tetrachloride mud for hydrolysis, performing first sedimentation after the hydrolysis, performing stratification so as to obtain a supernatant liquid and bottom concentrated mud, performing second sedimentation on the supernatant liquid obtained from the first sedimentation, performing stratification so as to obtain low-aluminum TiCl4 and bottom concentrated mud, and performing tubular filtration or slurry evaporation treatment on the bottom concentrated mud according to different solid content. A combined process including hydrolysis, first sedimentation, second sedimentation, tubular filtration and slurry evaporation is performed on the aluminum powder vanadium-removing mud, the aluminum impurities in the mud maximally are separated maximally, and titanium tetrachloride in the mud is recovered.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for removing aluminum from vanadium-removing mud by crude titanium-aluminum tetrachloride powder. Background technique [0002] Titanium tetrachloride (TiCl 4 ) is an important intermediate in the production of titanium metal and its compounds, industrial production of TiCl 4 The mainstream method is the boiling chlorination method, but regardless of the boiling chlorination or molten salt chlorination method, the resulting crude TiCl 4 contain AlCl 3 , FeCl 3 、SiCl 4 、VOCl 3 , VCl 4 Other impurities; TiCl 4 Abnormal colors such as red and yellow are caused by their presence. Usually, high boiling point components (as FeCl 3 , AlCl 3 Represented) and low boiling point components (SiCl 4 Representative) is generally removed by distillation and rectification tower. And for the boiling point and TiCl 4 Similar ingredients (as VOCl 3 as a represe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/02C22B34/12
CPCC01G23/024C22B34/129Y02P10/20
Inventor 李亮李开华朱福兴马尚润
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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