Smelting furnace with tin concentrate continuous crude tin smelting and continuous slag fuming functions and smelting method

Abstract

The invention provides a smelting furnace with tin concentrate continuous crude tin smelting and continuous slag fuming functions and a smelting method. The smelting furnace comprises a front end topblowing melter and a rear end side blowing fuming dilution furnace, wherein the bottom of the front end top blowing melter communicates with the bottom of the rear end side blowing fuming dilution furnace. The front end top blowing melter comprises a cylindrical melter body (4), a material inlet (1) in the top of the melter, a smelting spray gun (3) inserted from the melter top, a melting fume outlet (5) formed in the melter top, and a crude tin discharging port (10) formed in the bottom of the melter body. The side blowing fuming dilution furnace comprises a cuboid box type furnace body (18),a vulcanizing agent adding port (20) formed in the furnace top, jetting systems (14) which are symmetrically arranged on the two sides of the lower portion of the furnace body and used for blowing air and fuel into the furnace, a dilution slag discharging port (15) formed in the lower portion of the furnace body, and a fumed gas outlet (19) formed in the top of the furnace. The furnace bottom ofthe cuboid box type furnace body is an oblique furnace bottom (12). Two metallurgy processes including tin concentrate continuous crude tin smelting and tin-rich slag smelting continuous sulfidizationfuming dilution can be completed at a time, the process is short, the operation cost is low, the tin recovery rate is high, and the energy-saving effect is good.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metallurgical equipment and methods, in particular to the pyrometallurgy of tin concentrate and the fuming and depleting equipment and method of tin-rich slag. Background technique [0002] The method of tin concentrate smelting to produce crude tin is generally divided into two main smelting production process steps. The first step is to smelt tin concentrate into crude tin and tin-rich slag, and the second step is to fume and deplete the tin-rich slag Tin is recovered and lean slag is produced. [0003] The traditional tin smelting process is to use blast furnaces, reverberatory furnaces, electric furnaces, etc. to smelt tin concentrates to produce crude tin, and at the same time produce tin-rich slag. The tin-rich slag of the smelting furnace is further fumed and depleted by a side-blown fuming furnace to recover tin fumes. Blast furnace smelting belongs to backward production capacity an...

AI Technical Summary

Problems solved by technology

But the main disadvantage is intermittent operation. The slag produced by the smelting furnace needs to be added intermittently. There are processes such as cooling, transportation, and heating. The process is long, the operation is complicated, the safety and environmental protection risks are large, and the energy consumption is high.

[0006] The above-mentioned equipment and methods are not only complicated in equipment, small in scale, large in total investment, and complicated in process, but also have a common problem, that is, the process of smelting tin concentrate into crude tin, tin-rich slag and fuming tin-rich slag is discontinuous, It takes multiple steps to complete the smelting of tin concentrate and the fuming and depletion of slag. Between the smelting and fuming processes, there are processes such as cooling down, transporting, adding to the fuming furnace, and heating up the tin-rich slag. There are many production links, and the processes and facilities Complex, intermittent operation, time-consuming, low production efficiency, high energy consumption, low recovery rate of tin metal, high labor intensity, high risk of safety and environmental pollution

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