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Device and settling method for processing crude titanium tetrachloride containing higher solid impurities

A crude titanium tetrachloride, solid phase technology, applied in titanium tetrachloride, chemical instruments and methods, feeding/discharging devices of sedimentation tanks, etc., can solve the problem of rapid wear and corrosion of equipment, poor sealing effect, pollution environment and other issues, to achieve the effect of improving production efficiency and reducing the frequency of burning loss

Active Publication Date: 2018-09-11
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

Chinese invention patent CN103191835A discloses a titanium tetrachloride slag-liquid separation centrifuge comprising a titanium tetrachloride storage tank, a casing, a frame, a differential, and a motor. During the separation process, there are technical problems such as poor sealing effect, rapid equipment wear and corrosion, high operation and maintenance costs, and serious environmental pollution.
However, the test proves that it is difficult to effectively process the crude titanium tetrachloride with high solid content by adopting the continuous sedimentation mode of the settling tank; although the centrifuge can realize the insoluble solid phase impurities in the crude titanium tetrachloride in a short time, it is difficult to realize the continuous entry and exit. materials and large-scale industrial production

Method used

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  • Device and settling method for processing crude titanium tetrachloride containing higher solid impurities
  • Device and settling method for processing crude titanium tetrachloride containing higher solid impurities
  • Device and settling method for processing crude titanium tetrachloride containing higher solid impurities

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The crude titanium tetrachloride with a solid content lower than 25g / L is continuously overflowed and settled, and its control parameters and results before and after settlement are shown in Table 1:

[0032] Table 1 The change of solid content before and after continuous overflow settlement

[0033]

[0034] The continuous overflow and sedimentation process controls the speed of the thickener agitator to 0.5rmp / min, and the feed rate is 1.7~2t.h -1 , After sedimentation, the solid content of crude titanium tetrachloride decreases by an average of 2g / L, and its value can be ≤4g / L.

Embodiment 2

[0036] First, the crude titanium tetrachloride with a solid impurity content greater than 25g / L is left to settle separately, and the results are shown in Table 2. The solid impurity contents of samples A, B, C, and D before sedimentation are 323g / L and 221g respectively / L, 59.5g / L, 25.5g / L, after standing and settling for 15h, 8h, 5h, 1.5h, the solid content of the upper clear night of crude titanium tetrachloride decreased significantly, all of which were ≤10g / L.

[0037] Table 2 Solid content and composition of crude titanium tetrachloride before and after static settlement

[0038]

[0039] After standing and settling, the crude titanium tetrachloride was cleared at night to carry out continuous overflow settlement to further reduce the solid content of crude titanium. The results are shown in Table 3:

[0040] Table 3 Changes in solid content before and after continuous overflow settlement

[0041]

[0042] After continuous overflow and settlement, the solid content...

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Abstract

The invention discloses a device and precipitation method for treating coarse titanium tetrachloride with high solid phase content impurities in the technical field of titanium metallurgy industry. The device comprises a thickener, a spiral material lifting machine located on a discharging opening in the bottom of the thickener, a clear liquid storing tank for containing a precipitated solution and a mud tank for collecting precipitated mud, and also comprises a standing precipitation pool and a measuring tank. The upper portion of the standing precipitation pool is connected with the measuring tank through a pipe, the measuring tank is connected to the thickener through a pipe, and a flow valve capable of accurately controlling the flow velocity of liquid entering the thickener is arranged on the a measuring tank. A solution with the solid impurity content larger than or equal to 25 g / L is subjected to standing precipitation treatment, then upper clear liquid is taken and subjected to continuous overflow precipitation treatment, coarse titanium tetrachloride with the high solid phase content impurities can be directly treated in the mode, insoluble solid impurities in the coarse titanium tetrachloride are continuously and stably separated, and the production efficiency and the production quality of the titanium tetrachloride are greatly improved.

Description

technical field [0001] The invention relates to the technical field of titanium metallurgy industry, in particular to a device and a settling method for treating crude titanium tetrachloride containing relatively high solid-phase impurities. Background technique [0002] Metal titanium and titanium alloys are widely used in aerospace, energy, chemical, metallurgy, civil and other fields due to their excellent properties such as high specific strength, low density, high temperature and low temperature resistance, and acid and alkali corrosion resistance. Titanium dioxide and sponge titanium are important intermediate raw materials. During the production process, due to the simultaneous chlorination of impurity elements in titanium slag or titanium-containing minerals, the impurity content in crude titanium tetrachloride increases. If the impurities in crude titanium tetrachloride If it is not removed well, it will be enriched in titanium sponge at four times the concentration...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D21/02B01D21/24B01D21/28B01D21/34C01G23/02
CPCB01D21/02B01D21/2405B01D21/245B01D21/286B01D21/34C01G23/024
Inventor 李亮李开华陈爱祥苗庆东漆丽华
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP