Continuous side blowing tin smelting process

Abstract

Disclosed is a continuous side-blast tin smelting technique implemented using a continuous side-blast tin smelting apparatus (10). The continuous side-blast tin smelting technique comprises the following steps: adding feed material containing tin to a smelting area (10111); using a smelting area side-blast spray gun (103) to spray from a side of the smelting area (10111) a first oxygen-containing gas and a first fuel toward the part of a melting pool that is in the smelting area (10111) so as to smelt the feed material containing tin and produce first crude tin and rich tin slag; adding a reducing agent to a reduction area (10112); using a reduction area side-blast spray gun (104) to spray from a side of the reduction area (10112) a second oxygen-containing gas and a second fuel toward the part of the melting pool that is in the reduction area (10112) so as to reduce the rich tin slag that has flown from the smelting area (10111) to the reduction area (10112) and produce second crude tin and slag, the second crude tin flowing from the reduction area (10112) to the smelting area (10111); discharging the first crude tin and the second crude tin from a tin discharge outlet (10114); intermittently discharging slag from a slag discharge outlet (10119).

Description

technical field [0001] The invention relates to a continuous side-blowing tin process. Background technique [0002] Tin smelting technologies include tin concentrate reverberatory furnace smelting process, electric furnace smelting process, Ausmelt smelting process, blast furnace smelting process, short kiln smelting process, and Kaldor furnace tin smelting process. The short kiln smelting process has long been eliminated due to high investment, management and maintenance costs, large flue gas volume, and low direct recovery rate. The equipment structure of the Kaldor furnace is complex, the maintenance cost is high, the furnace life is short, and the consumption of refractory materials is large. Reverberatory furnaces are rapidly being replaced by enhanced smelting methods due to their shortcomings such as low production efficiency, low thermal efficiency, high fuel consumption, and high labor intensity. Disadvantages of electric furnace tin smelting are too high power c...

AI Technical Summary

Problems solved by technology

The short kiln smelting process has long been eliminated due to high investment, management and maintenance costs, large flue gas volume, and low direct recovery rate

The equipment structure of Kaldor furnace is complicated, the maintenance cost is high, the furnace life is short, and the refractory material consumption is large

Reverberatory furnaces are rapidly being replaced by enhanced smelting methods due to their shortcomings such as low production efficiency, low thermal efficiency, high fuel consumption, and high labor intensity.

Disadvantages of electric furnace tin smelting are too high power consumption, which is only suitable for processing low-iron materials; blast furnace smelting process requires materials to be granulated or pelletized, expensive metallurgical coke is consumed, the atmosphere in the furnace is difficult to control, and the disadvantages of high volatilization rate of tin are no longer available. reuse

Ausmelt smelting is an enhanced melting pool smelting technology. It is operated in stages, and the tin content in slag can be reduced to a lower level, but the investment is large, the maintenance cost is high, and the operation is complicated.

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