Magnesium smelting reducing slag waste heat boiler

Abstract

The invention relates to a waste heat boiler, in particular to a magnesium smelting reducing slag waste heat boiler utilizing high-temperature waste slag energy produced during production of metal magnesium by a thermal method. The waste heat boiler comprises an outer barrel, an inner barrel, sealing heads, a flanged pipe plate and a sealing plate, wherein the sealing heads are arranged at the two ends of the outer barrel; the flanged pipe plate is arranged at one end of the inner barrel; and the sealing plate is arranged at the other end of the inner barrel. The waste heat boiler is characterized in that a cooling water inlet is formed in the sealing head on one side; a heat exchange pipe bundle is horizontally fixed inside the inner barrel through the sealing plate and a support plate; high-temperature waste slag inlets and low-temperature waste slag outlets are respectively equidistantly distributed on the top and the bottom of the outer barrel; an exhaust hole, a pressure gauge interface, a safety valve interface, a lug and a high-temperature water outlet are formed in sequence at the upper part of the outer barrel from left to right; and a drain outlet and a saddle are arranged in sequence at the lower part of the outer barrel from right to left. The waste heat boiler has a unique structure; and high-temperature waste slag generated by smelting magnesium through a thermal method is taken as an energy resource for heating cooling water into high-temperature water, so that energy is recovered, a large amount of fossil energy is saved, and the production cost of metal magnesium is lowered.

Description

technical field [0001] The invention relates to a waste heat boiler, in particular to a magnesium smelting reduction slag waste heat boiler which recovers the high-temperature waste slag energy generated when the metal magnesium is produced by a heat method. Background technique [0002] At present, my country ranks first in the world's largest producer and exporter of magnesium. The production of metal magnesium mainly includes thermal reduction and electrolysis, but most enterprises in my country use thermal reduction to produce magnesium. Since 1 ton of magnesium produced by thermal magnesium smelting produces an average of 6 tons of magnesium reduction slag, and the temperature of the slag leaving the reduction tank is 1200°C, which contains a lot of heat energy. However, limited by the existing technology, the high-temperature slag is directly transported to the waste disposal plant to accumulate and it is difficult to effectively use it, and there is even less research...

AI Technical Summary

Problems solved by technology

However, limited by the existing technology, the high-temperature slag is directly transported to the waste disposal plant to accumulate and it is difficult to effectively use it, and there is even less research and application on the utilization of the waste heat contained in the high-temperature slag.

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