Oxygen-enriched side-blown smelting furnace for complicated and unworkable gold concentrate

Abstract

The invention discloses an oxygen-enriched side-blown smelting furnace for complicated and unworkable gold concentrate. The smelting furnace is divided into a heating zone and a reaction zone; a cooling water jacket is arranged all around the side wall of the reaction zone, and the cooling water jacket is divided into three or more layers and can be detached independently; the three-layer water jacket on the side wall of the reaction zone is provided with two rows of air ports, high concentration oxygen-enriched air is fed into the lower air ports to react with materials during working, and the upper air ports adjust the produced smoke gas to be at oxygen excess state; compact high-temperature resistant heat insulation coating is embedded in the cooling water jacket and the contact zone of the smelting furnace, and a layer of 5-10mm high-temperature resistant heat insulation material is coated for heat insulation on the outer layers of the flame retardant coatings inside and at the top of the smelting furnace respectively; and a furnace slag and gold concentrate separation zone is arranged at one end of a smelting furnace body, gold concentrate and furnace slag are respectively discharged out from a gold concentrate discharge port and a furnace slag discharge port at both ends, three heating electrodes are arranged at the top of the separation zone for adjusting and controlling the temperature of the furnace slag so as to ensure the thorough separation of gold concentrate and furnace slag. The smelting furnace has low energy consumption, high synthetic recovery rate of gold, silver, bronze, sulfur and the like, high material adaptability and good operating environment simultaneously.

Description

technical field [0001] The invention relates to the technical field of metallurgical refining, in particular to an oxygen-enriched side-blowing smelting furnace for complex and refractory gold concentrates. Background technique [0002] At present, when refining complex and difficult gold concentrates containing arsenic, carbon, copper, and fine-grained gold and silver, the refining methods used at home and abroad mainly include: boiling oxidation roasting method; bacterial pre-oxidation method; Pressure leaching pre-oxidation cyanide gold extraction method; roasting acid leaching extraction electrodeposition copper cyanide gold extraction method; oxygen-enriched bottom blowing matte gold paving method; silver furnace matte gold paving method. [0003] Among the above-mentioned refining methods, the roasting acid leaching extraction electrowinning copper cyanide gold extraction method has a large amount of waste acid, the silver recovery rate is low, and the energy consumpti...

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Problems solved by technology

[0003] Among the above-mentioned refining methods, the roasting acid leaching extraction electrowinning copper cyanide gold extraction method has a large amount of waste acid, the silver recovery rate is low, and the energy consumption is high; less than 80%), it is difficult to process high-silicon complex gold concentrate, the furnace body and the flue cannot be completely closed, and there is a problem of easy leakage of harmful flue gas; Poor conditions and other issues

It can be seen that the three processes of roasting, bacteria and pressurization in the prior art all have problems such as low comprehensive utilization of resources, low recovery rate of gold, silver and copper, and accumulation of process waste residues.

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