Unlock instant, AI-driven research and patent intelligence for your innovation.

Short-process pyrometallurgy device and method

A short-process zinc smelting technology, applied in the field of pyro-method zinc smelting, can solve the problems of high energy consumption and complicated process, and achieve the effect of improving recovery rate, high recovery rate and high production efficiency

Active Publication Date: 2021-06-22
CHINA ENFI ENGINEERING CORPORATION
View PDF11 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Short-process pyrometallurgy device and method
  • Short-process pyrometallurgy device and method
  • Short-process pyrometallurgy device and method

Examples

Experimental program
Comparison scheme
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.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a short-flow pyrometallurgy device and method. The device includes a furnace body, a partition wall and at least one heating electrode, the furnace body has an inner cavity; the partition wall is arranged in the inner cavity of the furnace body, and the partition wall divides the inner cavity into a melting zone and an electrothermal reduction zone in a horizontal direction, and There is a communication channel under the partition wall to connect the smelting area and the electrothermal reduction area; the smelting area is equipped with a first feed port and a flue in the smelting area, and the first feed port is used to add zinc concentrate and flux; the electrothermal reduction area is set There is a second feed port, at least one electrode through hole and a flue in the electrothermal reduction zone, the second feed port is used to add reducing agent; the heating electrode corresponds to the electrode through hole one by one and extends to the inside of the electrothermal reduction zone through the electrode through hole . Utilizing the pyro-method zinc smelting device provided by the present invention through the furnace body effectively solves the problems of complex process and high energy consumption in the prior art pyro-method zinc smelting, and has the advantages of high production efficiency, low equipment cost, and high zinc efficiency. High recovery rate and other advantages.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
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