A vertical metal reduction tank

Abstract

The invention provides a vertical metal reduction tank which comprises a reduction cavity, a crystallizing cavity and a tank cap, wherein the reduction cavity and crystallizing cavity are formed by tank walls and are mutually communicated; the tank cap is covered on the open end of the crystallizing cavity; the periphery of the crystallizing cavity is provided with a water jacket for cooling; the vertical metal reduction tank is also provided with an extractor arranged in the crystallizing cavity; the extractor comprises a cover plate for dividing the crystallizing cavity into an inner cavity and an outer cavity, a retention part which is arranged on the cover plate and positioned in the inner cavity of the crystallizing cavity, and a pulling part which is arranged on the cover plate and positioned in the outer cavity of the crystallizing cavity; the outer cavity of the crystallizing cavity is provided with a vacuumizing port; and the metal can crystallize in the inner cavity of the crystallizing cavity and can be taken out together with the retention part when the pulling part is operated outwards. According to the design, vapor can directly crystallize in the inner cavity of the tank wall of the crystallizing cavity of the vertical metal reduction tank, and the crystal can be taken out by the extractor, thereby enhancing the cooling efficiency and lowering the dead tank risk.

Description

technical field [0001] The invention relates to the field of silicothermal magnesium smelting, in particular to a vertical metal reduction tank used for smelting metal calcium, magnesium and strontium. Background technique [0002] In the current silicon thermal smelting field, the production methods of metal calcium, magnesium, strontium, etc. are mostly carried out with horizontal reduction tanks, and vertical reduction tanks are also being actively developed. The principle and method of magnesium smelting between the two are the same, the main difference is The type reduction tank can use its own weight to realize loading and unloading of slag, and set a central pipe to facilitate the rising and overflowing of magnesium vapor at the bottom. Please refer to a horizontal reduction tank disclosed by Chinese Invention Patent Publication No. CN102676849A and a vertical reduction tank disclosed by Chinese Invention Patent Publication No. CN101520276B. At present, the magnesium ...

AI Technical Summary

Problems solved by technology

However, when the temperature is overheated during the reduction process, the coarse magnesium in the crystallizer is rapidly melted into a liquid state by the heat radiation in the tank, and the liquid magnesium flows outward with the vacuum air flow, surrounding the camel-shaped crystal in the straight water jacket. The device quickly condenses into a magnesium plug, tightly plugging the camel-shaped crystallizer with the small head outward, resulting in a dead tank that cannot be taken out, and the time and manpower and material resources for processing and maintenance are relatively large.

[0003] In addition to the disadvantages of the above-mentioned crystallizer shape that can easily cause dead tanks, there are also restrictions on the temperature rise of the production process

In the production process, in order to completely collect the magnesium vapor in the crystallizer, usually the camel-shaped crystallizer in both horizontal and vertical tanks is always hot at the big mouth end close to the high-temperature tank, but this process will inevitably cause crystallization The phenomenon of empty cans and high material ratio caused by the red burning of the container

Since the crystallizer is indirectly cooled in the water jacket, if the temperature rises too fast in production practice and the strong heat radiation in the tank is greater than the cooling temperature, the crystallizer will burn red and the circulating water in the water jacket will be boiled instantly, resulting in the final The problem of high magnesium content in empty cans

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