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Application of additive to regulation and control of slag viscosity in pyrometallurgy process of non-ferrous metal

A non-ferrous metal, pyrometallurgical smelting technology, applied in furnaces, electric furnaces, furnace types, etc., can solve the problems of increased production costs and energy consumption, low reduction rate, insufficient contact, etc., to promote efficient utilization, reduce production costs, The effect of reducing viscosity

Inactive Publication Date: 2016-10-26
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: the use of solid additives such as coke and insufficient contact with slag leads to low reduction rate and large consumption, and produces a large amount of greenhouse gases, which seriously pollutes the environment; the reduction efficiency of gas additives such as natural gas is high, but its storage conditions require more High, safety accidents are prone to occur at high temperatures; using diesel oil and other liquids to control the magnetic iron oxide minerals in the slag reduction slag, although its reduction efficiency is high and it is easy to store without safety hazards at high temperatures, but it takes about 2L of diesel oil on average to Dilute one ton of slag, increase production cost and energy consumption
No matter it is tin smelting or zinc smelting, the biggest thing they have in common is that the reduction smelting uses coal powder as the reducing agent, the reduction rate is not high, and the consumption is large, which directly leads to the increase of production costs, and the use of coal powder reduction produces a lot of environmental pollution. severe smoke

Method used

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  • Application of additive to regulation and control of slag viscosity in pyrometallurgy process of non-ferrous metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Such as figure 1 As shown, the application method for regulating the viscosity of slag in the non-ferrous metal pyrometallurgy process is as follows: with biodiesel as an additive, the smelting copper slag is injected at a flow rate of 95L / min (through pressurized argon carrier gas) for 40 minutes, The magnetic iron content in the slag is reduced to 6.8wt%, the viscosity of the slag is reduced by 55% after injection reduction, the copper content in the slag is reduced to 0.32wt%, the consumption of additives is 5L / t, and the cost is reduced by 20 ~30 yuan / t.

[0015] Comparative test: In the process of copper pyro-smelting, it is generally used to smelt and deplete the smelting copper slag in an electric furnace, inject diesel oil into the electric furnace, and reduce the content of magnetic iron in the slag to regulate the viscosity of the slag. After spraying for 80 minutes at the flow rate of / min, the content of magnetic iron in the slag was 9.7wt.%, the viscosity ...

Embodiment 2

[0017] Such as figure 1 As shown, the application method of controlling the viscosity of slag in the non-ferrous metal pyrometallurgy process is as follows: 60wt% of biodiesel and 40wt% of waste oil are used as composite additives, and the flow rate of smelting copper slag at 75L / min (through pressurized argon carrier gas ) for 50 minutes under injection, the magnetic iron content in the slag was reduced to 7.2wt%, the viscosity of the slag was reduced by 50% after injection reduction, the copper content in the slag was reduced to 0.36%, and the consumption of additives was 6L / t, the cost has dropped by 15~40 yuan / t.

[0018] Comparative test: In the process of copper pyro-smelting, the smelting copper slag is generally smelted and depleted in an electric furnace, and diesel oil is injected into the electric furnace to reduce the content of magnetic iron in the slag so as to control the viscosity of the slag. After injection for 60 minutes at the injection rate of / h, the co...

Embodiment 3

[0020] Such as figure 1 As shown, the application method of controlling the viscosity of slag in the pyrometallurgy process of nonferrous metals is: 50wt% of biodiesel, 20wt% of gutter oil and 30% of vegetable oil (including 15% of jatropha oil and 15% of rubber seed oil) Additive, after smelting copper slag was sprayed at a flow rate of 75L / min (via pressurized argon carrier gas) for 60 minutes, the magnetic iron content in the slag was reduced to 7.5wt%, and the viscosity of the slag was reduced by 47% after the injection reduction %, the copper content in the slag dropped to 0.42wt%, the consumption of additives was 7L / t, and the cost dropped by 25~50 yuan / t.

[0021] Comparative test: In the process of copper pyro-smelting, it is generally used to smelt and deplete the smelting copper slag in an electric furnace, and inject diesel oil into the electric furnace to reduce the content of magnetic iron in the slag so as to control the viscosity of the slag. After injection fo...

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Abstract

The invention relates to application of an additive to regulation and control of slag viscosity in the pyrometallurgy process of non-ferrous metal and belongs to the technical field of non-ferrous metal. The additive is an additive formed by mixing one or more of the biological diesel oil, the illegal cooking oil and the vegetable fat in any proportion. The additive is sprayed and blown into high-temperature slag by pressurizing carrier gas to regulate and control the slag viscosity. The additive can reduce the viscosity of the slag in the pyrometallurgy process of the non-ferrous metal and makes the slag separated from valuable metal better, and therefore the recycling rate of the valuable metal is increased, and efficient utilization of biomass and waste resources can also be achieved.

Description

technical field [0001] The invention relates to the application of an additive to control the viscosity of slag in the pyrometallurgy process of nonferrous metals, and belongs to the technical field of nonferrous metals. Background technique [0002] At present, my country's non-renewable mineral resources are depleting day by day, and the existing minerals are less rich ore, more lean ore, low-grade raw ore, and difficult to mine and select. However, a large amount of smelting slag accumulates, which not only occupies land but also pollutes the environment. The slag also contains a large amount of valuable metals, which has high utilization value. Therefore, recycling this part of valuable metals in waste slag has high economic value. The traditional non-ferrous metal pyrometallurgy process is to use carbonaceous reducing agent or change the slag type to control the viscosity of the slag so that the slag and metal can be separated better. However, carbonaceous reductants ...

Claims

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Application Information

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IPC IPC(8): C22B9/10C22B15/00
CPCC22B9/10C22B15/0039
Inventor 王华李博周浩魏永刚胡建杭
Owner KUNMING UNIV OF SCI & TECH