Top-side blowing furnace kiln for treating high magnesium nickel sulfide ore

Abstract

The invention discloses a top-side blowing furnace kiln for treating high magnesium nickel sulfide ore. The top-side blowing furnace kiln comprises a furnace body (1) and a furnace body support seat (2); the furnace body (1) comprises a refractory brick layer (3), a cold water jacket (5) and a furnace shell (4) from inside to outside; the top of the furnace body (1) is a film type fireplace top; atop blowing muzzle is formed in the top; a top blowing gun (6) stretches into the furnace body (1) from the top blowing muzzle to provide process wind; a slag line is arranged in the middle of the furnace body; and 6 to 8 fuel side blowing spraying guns (7) are arranged at 300-500 mm below the slag line. The top-side blowing furnace kiln realizes multi-point uniform coal powder injection, releases heat of the powdered coal in a molten pool, reduces secondary combustion of powdered coal in a hearth and avoids upward moving of the entire furnace kiln hot area, so that the coal utilization ratiois increased during the smelting process, and the system overall thermal load is reduced.

Description

technical field [0001] The invention belongs to the field of smelting furnaces, in particular to a furnace for pyrometallurgical smelting of high-magnesium nickel sulfide concentrate. Background technique [0002] Oxygen-enriched top-blown nickel smelting generally adopts the Osmet furnace. The heat required for the smelting process of nickel sulfide concentrate in the Osmet furnace is partly released by the reaction of the smelting process, and the other part is produced by the concentrate coal blending and the granulation of the mixed material. There are three methods of secondary lump coal and top-blowing lance coal. [0003] Coal blending in the top-blowing lance is easy to cause heat concentration, which will affect the life of the top-blowing lance, so it is not suitable to blend too much coal in the top-blowing lance. [0004] After the concentrate is blended with coal, the mixed material is granulated, and the granulated material is mixed with flux and secondary lum...

AI Technical Summary

Problems solved by technology

According to the comparison between the theoretical coal consumption calculated by the METSIM metallurgical calculation software and the actual coal consumption on site, 40-50% of the coal is burned in the furnace, resulting in the lack of effective heat in the melting pool smelting process

In this case, it is often necessary to increase the proportion of coal in the ingredients and the proportion of secondary coal, resulting in a vicious circle, and the combustion of a large amount of coal in the furnace causes an increase in the evaporation of the waste heat boiler

[0005] The inclined section of the furnace facing the boiler surface is generally built with a flat water jacket and refractory materials. When the boiler loses coke, it will have a large impact on this part, causing damage to the furnace bricks, and then the furnace shell turns red, and the rigidity of the furnace shell is affected.

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