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Refining device and refining method for mixed molten salt product in titanium tetrachloride production

A technology of mixing molten salt and titanium tetrachloride, applied in magnesium chloride, magnesium halide and other directions, can solve the problems of unavailability, waste of valuable materials, low quality, etc., to meet the requirements, ensure smooth progress, and achieve the effect of effective utilization

Pending Publication Date: 2020-11-20
QINGHAI NORMOON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Second, the traditional boiling method prepares the magnesium chloride-based mixed molten salt produced in the titanium tetrachloride process, but the traditional boiling method prepares the magnesium chloride-based mixed molten salt produced in the titanium tetrachloride process. In addition to metal oxide impurities such as magnesium, calcium, iron, manganese, aluminum and silicon, it also contains manganese chloride and ferrous chloride impurities, so they cannot be used and can only be disposed of as slag, which not only causes valuable Huge waste of materials and adverse effects on the ecological environment
[0004] After investigation, it is found that there is still no market demand for this mixed molten salt, but for the magnesium electrolysis process, the impurities manganese chloride and ferrous chloride contained in the mixed molten salt are extremely harmful. Research shows that: when When the electrolyte contains 0.115% manganese chloride, the current efficiency is 86%; when the electrolyte contains 0.229% manganese chloride, the current efficiency is 81-84%; when the electrolyte contains 1.60% manganese chloride, the current efficiency is 62% %

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  • Refining device and refining method for mixed molten salt product in titanium tetrachloride production
  • Refining device and refining method for mixed molten salt product in titanium tetrachloride production

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Embodiment 1

[0036] Please refer to the attached figure 1 with 2 , the present invention provides a refining device for mixed molten salt products in the production of titanium tetrachloride, which is composed of a molten salt refining chamber 2, a circulating refining chamber 3 and a finished product molten salt chamber 4, characterized in that: the molten salt refining chamber 2. The circulating refining chamber 3 and the finished molten salt chamber 4 are built in a furnace shell 1 with refractory materials; a common sealed main cover 5 is arranged on the top of the furnace shell 1; the circulating refining chamber 3 is arranged in the middle of the furnace shell 1 , the molten salt refining chamber 2 and the finished product molten salt chamber 4 are on both sides of the circulating refining chamber 3; an arch wall 6 is arranged between the molten salt refining chamber 2 and the circulating refining chamber 3, passing through the bottom of the arch wall 6 The arched channel 7 is conne...

Embodiment 2

[0044] The refining method of the refining device of mixed molten salt product in the production of titanium tetrachloride, specifically comprises the steps:

[0045] Step 1, cleaning up the sundries in the device: clean up the sundries inside the installed device;

[0046] Step 2, oven: use a movable oven for oven;

[0047] Step 3, start: after the oven is finished, add the previously prepared mixture of 80% magnesium chloride and 20% calcium chloride at a temperature of 700°C and 20% by mass into the molten salt refining chamber 2 from the sampling port 91 with a vacuum ladle ; When the liquid level of the mixed liquid is 10cm higher than the position of the heating electrode 124, send alternating current; stop adding until the liquid level of the mixed liquid reaches 0.7-1.1m, and continue to heat up to 700-720°C, then use The refined molten salt transfer pump 23 in the molten salt circulation chamber 3 pumps the mixed solution into the finished molten salt chamber 4; when...

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Abstract

The invention discloses a refining device and a refining method of a mixed molten salt product in titanium tetrachloride production. The device consists of a molten salt refining chamber for removingharmful impurities of manganese chloride and ferrous chloride in a mixed molten salt solution from magnesium liquid, a molten salt circulating chamber for circularly carrying out the refining process,and a molten salt chamber for buffering and storing refining qualified molten salt. Metal magnesium liquid has reduction reaction with manganese chloride and ferrous chloride in the mixed molten salt, generated metal manganese is dissolved in the magnesium liquid to form magnesium-manganese liquid which can be used for producing manganese-containing magnesium alloy products, a part of the generated metal iron is dissolved in the magnesium liquid, and excessive iron separates out and enters the furnace bottom slag, and the generated magnesium chloride enters the molten salt, so that harmful impurities of manganese chloride and ferrous chloride in the mixed molten salt are removed, the requirements of magnesium electrolysis raw materials are met, effective utilization of the mixed molten salt is achieved, and metal magnesium serving as a refining agent is converted into a value-added magnesium-manganese intermediate alloy product to be directly used for producing conventional magnesiumalloy products.

Description

technical field [0001] The invention relates to the technical field of waste utilization in the production of titanium tetrachloride, in particular to a refining device and a refining method for mixed molten salt products in the production of titanium tetrachloride. Background technique [0002] In the production process of titanium sponge, magnesium chloride will be produced in two links. One is in the titanium tetrachloride reduction process, the molten magnesium chloride produced in this process has high purity, so it is directly used as the raw material of electrolytic magnesium and added to the magnesium electrolytic cell, and the magnesium liquid and chlorine gas produced by the magnesium electrolytic cell are directly used in the production of sponge titanium The raw materials not only fully utilize the molten magnesium chloride by-product of the titanium tetrachloride reduction process, but also realize the internal recycling of molten magnesium chloride, magnesium l...

Claims

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Application Information

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IPC IPC(8): C01F5/30C25C3/04
CPCC01F5/30C25C3/04C01P2006/80
Inventor 周茂敬
Owner QINGHAI NORMOON TECH