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Gas continuous production vertical reducing furnace and magnesium refining method of the same

A reduction furnace and vertical technology, which are applied in the field of gas continuous production vertical reduction furnace and magnesium smelting, can solve the problems of restricting the production scale of Pidgeon method magnesium smelting, unsatisfactory economic benefits, and high labor intensity of workers, so as to reduce labor The effect of production intensity, saving resources and improving the working environment

Inactive Publication Date: 2009-09-16
曲智
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the Pidgeon method of magnesium smelting has been continuing to use the external heating and internal vacuum of the horizontal tank invented by Pidgeon. The calcined balls are heated in the tank to about 1150-1180°C for solid-phase reduction reaction to generate magnesium vapor, which is pumped out by a steam jet vacuum pump unit. Magnesium vapor, crystallized magnesium is obtained in the condenser, and then remelted and refined in the refining furnace. This Pidgeon method of magnesium smelting reduction technology is mature, easy to master, flexible in production scale and fast in plant construction, but it requires manual labor. , so that the labor intensity of workers is high, the production efficiency is low, and the expansion of production can only be done by building furnaces and adding tanks in a dotted pattern, which not only covers a large area, but also consumes high energy, low output, serious pollution, and unsatisfactory economic benefits. There are serious restrictions on the production scale of Pidgeon process magnesium smelting

Method used

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  • Gas continuous production vertical reducing furnace and magnesium refining method of the same
  • Gas continuous production vertical reducing furnace and magnesium refining method of the same
  • Gas continuous production vertical reducing furnace and magnesium refining method of the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A method for smelting magnesium using a gas-fired continuous production vertical reduction furnace. The gas-fired continuous production vertical reduction furnace adopts a continuous production method, and the upper loading, lower slag discharge, and middle magnesium discharge are carried out automatically and continuously without damaging the reduction reaction zone. Vacuum degree, the reduction reaction continues as usual. Follow these steps when loading for the first time:

[0052] (1) Preheating the reduction furnace by using the injector type fully premixed low nitrogen oxide burner 14:

[0053] There is a gap between the burner nozzle 75 and the fire channel 16, and between the fire channel 16 and the inner wall of the combustion chamber 8, and the gap is used to inject the gas and air to discharge the smoke from the annular high-temperature flue 9. The gas overflows at 27 places, sucks part of the high-temperature flue gas, and circulates up and down the fire ch...

Embodiment 2

[0076] Calcined ball is set as 600mm / h in descending speed in reduction reaction tube cavity 6, and the time that stays in reduction reaction tube cavity 6 is 6 hours, and the output of magnesium reaches 39.6 kilograms per hour. More than 2280 tons. Other steps are the same as in Embodiment 1.

Embodiment 3

[0078] Calcined ball is set as 650mm / h in descending speed in reduction reaction tube chamber 6, and the time that stays in reduction reaction tube chamber 6 is 5.5 hours, and the output of magnesium reaches 42.8 kilograms / hour. More than 2465 tons. Other steps are the same as in Embodiment 1.

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Abstract

The invention relates to a kind of gas vertical furnace and its refining method for magnesium, including a monomer of reduction, frame, furnace bottom shelf, insulating smoke-box. In the invention, a number of monomers of reduction are vertically fixed on the furnace bottom shelf, and then they are placed in a large insulating smoke-box. The refining method show as follow: it injects forging balls from the top of the furnace, and then it pre-vacuum pumps and preheats the furnace, and then it carries out dynamic reduction reaction in the lumen, and then it extracts the steam of magnesium and condenses it into liquid which can be released for direct ingot, in the end, it gets rid of the residual after cooling.

Description

technical field [0001] The invention relates to a vertical reduction furnace for continuous gas production and its magnesium smelting method Background technique [0002] With the increasing demand for metal magnesium in the international market and the advantages of its own magnesium resources, magnesium factories have sprung up in China. By 2001, nearly 40% to 50% of the raw magnesium in the international market will be provided by China, and my country has become the world's largest producer and exporter of magnesium, occupying a pivotal position in the international magnesium industry, of which 95% of the magnesium is Produced by the Pidgeon method. At present, the Pidgeon method of magnesium smelting has been continuing to use the external heating and internal vacuum of the horizontal tank invented by Pidgeon. The calcined balls are heated in the tank to about 1150-1180°C for solid-phase reduction reaction to generate magnesium vapor, which is pumped out by a steam jet ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B5/16C22B26/22
CPCY02P10/20
Inventor 曲智
Owner 曲智
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