Short-process zinc pyrometallurgical device and method

A short-process, zinc-smelting technology, applied in the field of pyro-zinc smelting, can solve the problems of complex process and high energy consumption, and achieve the effects of high recovery rate, improving recovery rate and reducing configuration height difference.

Active Publication Date: 2019-08-16
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide a short-process pyro-method zinc smelting device and method to solve the problems of complex process and high energy consumption in the prior art when pyro-method zinc smelting is carried out

Method used

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  • Short-process zinc pyrometallurgical device and method
  • Short-process zinc pyrometallurgical device and method
  • Short-process zinc pyrometallurgical device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0063] Zinc concentrate (containing Zn: 50%) and slagging agents (FeO, SiO 2 and CaO) are directly added from the feeding port set in the smelting area of ​​the Bref furnace, and the oxygen-enriched air is sprayed into the Bref furnace from the side of the smelting area of ​​the Bref furnace, and then the zinc concentrate and the oxygen-enriched air are oxidized and smelted to obtain flue gas, high zinc scum. Flue gas SO in smelting zone of Bref furnace 2 The content is more than 20%. After the waste heat boiler cools down and the dust is collected by the electrostatic precipitator, the flue gas is sent to make acid. The slag type of high zinc slag is ZnO-FeO-SiO 2 Type, ZnO-FeO-SiO 2 -CaO type, ZnO-FeO-SiO 2 -CaO-ZnO type. The oxygen concentration in the oxygen-enriched air is 60%, and the melting temperature in the melting zone of the Bref furnace is 1300°C.

[0064] The above-mentioned high-grade zinc slag enters the electrothermal reduction zone of the Bref furnace t...

Embodiment 2

[0066] The difference from Example 1 is that the melting temperature in the electrothermal reduction zone of the Bref furnace is 1300°C.

Embodiment 3

[0068] The difference from Example 1 is that the smelting temperature in the electrothermal reduction zone of the Bref furnace is first 1300°C and then 1400°C. Flue gas, slag and pig iron are obtained from the electrothermal reduction zone of the Bref furnace.

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Abstract

The invention provides a short-process zinc pyrometallurgical device and method. The short-process zinc pyrometallurgical device comprises a furnace body, a partition wall and at least one heating electrode; the furnace body is provided with an inner cavity; the partition wall is arranged in the inner cavity of the furnace body, the inner cavity is divided into a smelting area and an electric heating reduction area by the partition wall in the horizontal direction, and a communication channel is arranged on the lower portion of the partition wall and used for communicating with the smelting area and the electric heating reduction area; the smelting area is provided with a first feeding inlet and a smelting area flue, and the first feeding inlet is used for allowing zinc concentrate and a fusing agent to be added; the electric heating reduction area is provided with a second feeding inlet, at least one electrode through hole and an electric heating reduction area flue, and the second feeding inlet is used for allowing a reducing agent to be added; and the heating electrodes correspond to the electrode through holes one by one and extend into the electric heating reduction area through the electrode through holes. According to the short-process zinc pyrometallurgical device provided by the invention, through the furnace body, the problems that in the prior art, a zinc pyrometallurgical mode is complex in process, high in energy consumption and the like are effectively solved, and the short-process zinc pyrometallurgical device has the advantages of being high in production efficiency, low in equipment cost, high in zinc recovery rate and the like.

Description

technical field [0001] The invention relates to the technical field of pyrometallurgy, in particular to a short-process pyrometallurgy device and method. Background technique [0002] Zinc is one of the top ten non-ferrous metals and is widely used in all aspects of the national economy. At present, zinc smelting is mainly based on wet process. Zinc concentrate is leached after roasting or other means to obtain zinc sulfate solution, which is purified and electrolytically deposited to obtain cathode zinc flakes, and zinc casting to obtain Zn99.995 zinc ingots. This process has many steps, complex process, huge investment, and high energy consumption. The DC power consumption per ton of zinc in a single electrowinning process reaches 3000kWh. The most important thing is that the wet process produces a large amount of leaching slag, iron slag, etc., and its output rate exceeds 50%. These slags are hazardous wastes that need to be treated harmlessly, causing a large amount of ...

Claims

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Application Information

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IPC IPC(8): C22B19/04
CPCC22B19/04
Inventor 李东波黎敏邓兆磊尉克俭茹洪顺曹珂菲苟海鹏裴忠冶吴卫国许良冯双杰李兵
Owner CHINA ENFI ENGINEERING CORPORATION
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