Zinc smelting equipment and zinc smelting process

A zinc smelting and process technology, applied in lighting and heating equipment, waste heat treatment, furnace components, etc., can solve the problems of low zinc yield, waste, and low total zinc recovery rate

Active Publication Date: 2021-07-06
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Blast furnaces and vertical tanks have high requirements on raw material composition and complex material preparation process; electric furnaces need to control the atmosphere and temperature in the furnace to prevent a large amount of reduction of iron; the yield of zinc in the three pyrometallurgical zinc smelting processes is low, and the The slag contains high zinc content and the total recovery rate of zinc is low, resulting in waste of energy and mineral materials

Method used

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  • Zinc smelting equipment and zinc smelting process
  • Zinc smelting equipment and zinc smelting process

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Embodiment Construction

[0048] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0049] A zinc smelting process according to an embodiment of the present invention will be described below with reference to the accompanying drawings. Such as figure 1 Shown, the zinc refining process according to the embodiment of the present invention comprises the following steps:

[0050] A) adding zinc raw material, fuel, reducing agent and flux into the side blowing melting furnace 100 for oxidation melting, so as to obtain molten high zinc slag and melting furnace flue gas;

[0051] B) adding molten high-zinc slag and reducing agent into fuming furnace 200 for fuming and volatilization, so as to obtain liquid iron slag and fuming furnace flue gas;

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Abstract

The invention provides zinc smelting equipment and a zinc smelting process. The zinc smelting process comprises the following steps that (A) a zinc raw material, a fuel, a reducing agent and a flux are added into a side-blown melting furnace for oxidizing smelting so as to obtain molten high-zinc slag and melting furnace flue gas; (B) the molten high-zinc slag and the reducing agent are added into a fuming furnace for fuming volatilization so as to obtain liquid iron slag and fuming furnace flue gas; (C) the reducing agent, the flux and the liquid iron slag are added into an electric furnace for deep dilution so as to obtain pig iron, depleted slag and electric furnace flue gas; and (D) smoke dust in the fuming furnace flue gas is collected so as to obtain fuming furnace smoke dust, the fuming furnace smoke dust is leached so as to obtain zinc leaching liquid and leaching residues, wherein the step (C) and the step (D) do not have a sequence. Therefore, the zinc smelting process disclosed by the embodiment of the invention has the advantages of high metal element recovery rate, multiple metal element recovery types, capability of recovering a large amount of zinc elements and the like.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metals, and in particular relates to a zinc smelting equipment and a zinc smelting process. Background technique [0002] Zinc is one of the top ten common non-ferrous metals and has a wide range of applications. At present, zinc smelting is mainly based on wet process. Zinc concentrate is roasted and then leached. This process has a long technical process, complicated process, large investment and high energy consumption. A large amount of leaching slag will be produced in the zinc hydrometallurgy project. The leaching slag is hazardous waste and needs to be treated in a harmless manner. The leaching slag still needs to be treated in a side blowing melting furnace. [0003] In related technologies, blast furnaces, vertical tanks and electric furnaces are used for zinc smelting by pyrolysis, and the energy consumption is generally high. Blast furnaces and vertical tanks have high requirements...

Claims

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Application Information

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IPC IPC(8): C22B19/20C22B5/10C22B4/08C22B4/04F27D17/00
CPCC22B19/20C22B5/10C22B4/08C22B4/04F27D17/004F27D17/008F27D2017/006Y02P10/20
Inventor 陈学刚李东波苟海鹏裴忠冶马登余跃
Owner CHINA ENFI ENGINEERING CORPORATION
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