A wind-coal blowing furnace and a wind-coal blowing furnace smelting method for tin concentrate

Abstract

The invention relates to an air-coal blowing furnace and a tin concentrate air-coal blowing furnace smelting method, belonging to the technical field of nonferrous metal pyrometallurgy. The air-coal blowing furnace includes a furnace body, a flue, a slag outlet, a tin outlet and a raw material inlet, and also includes an air-coal blowpipe and a pyrite inlet. The furnace body is in the form of a column, and the bottom of the furnace body is conical. The furnace body is divided into a concentrate smelting area and a slag fuming area, and the top of the furnace body is equipped with a raw material inlet and a pyrite inlet corresponding to the concentrate smelting area and the slag fuming area; the method is to first add tin concentrate, reducing agent And selectively add flux to smelt in the reaction zone of the concentrate smelting zone to obtain crude tin and tin-containing slag. After the crude tin is discharged, put pyrite in the slag fuming zone for fuming operation, including SnS smoke and dust volatilization collection, low-tin slag discharge. The method has the advantages of simple process, short process, safe and controllable process, convenient operation and good environmental benefit.

Description

technical field [0001] The invention relates to an air-coal blowing furnace and a tin concentrate air-coal blowing furnace smelting method, belonging to the technical field of nonferrous metal pyrometallurgy. Background technique [0002] Traditional tin smelting technologies include blast furnace tin smelting, electric furnace tin smelting and reverberatory furnace tin smelting, all of which were developed from the original shaft furnace tin smelting. Blast furnace tin smelting is an earlier tin smelting method, but the material preparation has not been properly solved, so far only a few manufacturers use it. Electric furnace tin smelting began in 1934. At present, the output of electric furnace tin smelting in the world accounts for about 10% of the world's total output. The electric tin smelting furnace is basically sealed, the concentration of carbon monoxide in the furnace is high, and the reducing atmosphere is strong, so it is only suitable for processing Low iron ti...

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Problems solved by technology

[0003] The above methods are only partial improvements on different smelting, reduction, and fuming metallurgical equipment, and the crude tin smelting method designed is only a combination of different equipment, and the materials need to enter the corresponding metallurgical equipment between each process. Furnace processing, which will inevitably increase the cost of energy, environment, site, etc.

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