Metal sulfide ore all-oxygen negative-energy pyrogenic smelting method

A technology of pyrometallurgy and sulfide ore, applied in crucible furnaces, electric furnaces, rotary drum furnaces, etc., can solve problems such as high production costs, environmental pollution, and large fuel consumption, and achieve the goal of reducing pollution, reducing costs, and increasing SO2 concentration Effect

CN104593616AActive Publication Date: 2015-05-06KUNMING UNIV OF SCI & TECH

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: KUNMING UNIV OF SCI & TECH
Publication Date: 2015-05-06

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Abstract

The invention relates to a metal sulfide ore all-oxygen negative-energy pyrogenic smelting method, belonging to the technical field of nonferrous metals. The method comprises the following steps: carrying out oxidizing smelting on the metal sulfide concentrate in a bath smelting furnace, wherein in the redox smelting process, 90-100 vol% all-oxygen is sprayed by a spray gun in a top blowing or side blowing mode to convert metal sulfides into metal oxides; and after the oxidizing smelting is finished, obtaining furnace slag and sulfonium, wherein high-temperature flue gas generated in the process is recovered by a waste heat boiler for power generation, low-temperature flue gas from the waste heat boiler is dedusted by an electrostatic dust collector after being used for drying the concentrate, the dedusted flue gas is used for preparing 98 wt.% sulfuric acid, heat released by acid preparation is subjected to waste heat recovery, and the waste heat is used for ORC power generation or directly used for producing steam. The method lowers the smelting cost, reduces the pollution discharge, implements high-efficiency energy utilization by the high-energy-consumption metallurgical enterprises, and has certain economic benefits and environmental benefits.

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Description

technical field

[0001] The invention relates to a metal sulfide ore full-oxygen negative-energy pyrometallurgical smelting method, which belongs to the technical field of non-ferrous metals. Background technique

[0002] In the smelting process of non-ferrous metal sulfide ores, the molten pool smelting technology is more and more widely used. The molten pool smelting requires a large amount of fuel to provide the heat required for the reaction. The smelting reaction is completed under oxygen-rich conditions (oxygen concentration 40-80%). The process consumes a lot of fuel and emits a lot of greenhouse gas CO 2 , causing environmental pollution and increasing production costs.

[0003] Yunnan Copper Smelting and Processing Plant adopts Isa furnace to smelt copper sulfide concentrate in molten pool, sprays diesel oil or coal powder into the furnace by top blowing method, mixes in 40% oxygen-enriched air, and obtains copper matte and slag The mixture is being separated, and ...

Claims

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