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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

Active Publication Date: 2015-05-06
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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

Method used

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

Examples

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Effect test

Embodiment 1

[0021] like figure 1 As shown, the general smelting and processing factory of Yunnan Copper Industry Group uses the Isa furnace to smelt copper sulfide ore. Copper sulfide concentrate is made into ore powder, which is mixed with metallurgical flux quicklime, and the addition amount is 5% of the mass of copper sulfide concentrate, and the mixed material of copper sulfide concentrate with a copper grade of 48% is added to the Aisa furnace through the feeding port for smelting. The smelting time is 1.5h. When feeding materials, ensure that the temperature in the furnace is 1200°C, and the controllable temperature should be kept at 1250-1350°C. During the oxidation blowing process, the spray gun is inserted into the furnace from the top or side of the furnace, and the total oxygen with a concentration of 96% enters quickly through the spray gun. Into the liquid layer below the slag surface, the melt in the molten pool is strongly stirred, so that the material reacts with oxygen t...

Embodiment 2

[0023] like figure 1 As shown, the Yunnan Copper Industry Group Chuxiong Dianzhong Nonferrous Metals Company uses the Isa furnace to smelt copper sulfide ore. Copper sulfide concentrate is made into ore powder, which is mixed with quicklime, a metallurgical flux, in an amount of 8% of the mass of copper sulfide concentrate, and the mixture of copper sulfide concentrate with a copper grade of 41% is added to the Aisa furnace through the feeding port for smelting. The smelting time is 2h. When feeding materials, ensure that the temperature in the furnace is 1200 ° C, and the controllable temperature should be kept at 1250 ~ 1350 ° C. During the oxidation blowing process, the spray gun is inserted into the furnace from the top or side of the furnace, and the total oxygen with a concentration of 92% enters quickly through the spray gun. Into the liquid layer below the slag surface, the melt in the molten pool is strongly stirred, so that the material reacts with oxygen to melt an...

Embodiment 3

[0025] like figure 1 As shown, the first smelter of Yunnan Tin Industry Group uses Osmelt furnace to smelt tin sulfide ore. The tin sulfide ore is beneficiated to obtain tin sulfide concentrate, and the tin sulfide concentrate is mixed with quicklime with a mass of 6% tin sulfide concentrate, and the tin sulfide-tin concentrate mixture material with a tin grade of 45% is added to Austria from the feeding port. The smelting is carried out in the Smart Furnace, and the smelting time is 3 hours. When feeding materials, it is necessary to ensure that there is a sufficiently high temperature in the furnace of 1150°C, and the controllable initial temperature should be kept at 1200-1300°C. During the oxidation blowing process, the spray gun is inserted into the furnace from the top or side of the furnace, and the total oxygen with a concentration of 94% passes through The spray gun quickly enters into the liquid layer below the slag surface, and has a strong stirring effect on the m...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/00
Inventor 王华李博魏永刚孙财李建武
Owner KUNMING UNIV OF SCI & TECH
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