Suspension smelting electric heating reduction furnace and method for smelting zinc concentrate

A suspension smelting and reduction furnace technology, applied in the field of metallurgy, can solve the problems of inability to meet the requirements of modern large-scale industrial production, blast furnace, electric furnace slag with high zinc content, and high raw material composition requirements, so as to reduce the operation and occupation of melt discharge and addition. The effect of small land area and reduced tool consumption

Pending Publication Date: 2020-07-14
CHINA ENFI ENGINEERING CORPORATION
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  • 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; High zinc, low total zinc recovery
At present, except th

Method used

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  • Suspension smelting electric heating reduction furnace and method for smelting zinc concentrate
  • Suspension smelting electric heating reduction furnace and method for smelting zinc concentrate
  • Suspension smelting electric heating reduction furnace and method for smelting zinc concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] refer to Figure 7 , zinc concentrate (containing Zn: 50.1wt%), solvent (FeO, SiO 2 and CaO) and zinc slag (containing Zn: 19.7wt%) according to the mass ratio of 7:1:2 and then dried and sieved. The material nozzle is sprayed into the suspension smelting area, and then the zinc concentrate is contacted with oxygen-enriched air for oxidation smelting (smelting temperature is 1200°C), and sulfur-containing smelting flue gas and high-zinc slag are obtained. The gas is cooled by the waste heat boiler, dust is collected by the electrostatic precipitator, and the flue gas is sent to make acid. The slag type of the obtained high-zinc slag is ZnO-FeO-SiO 2 Type, ZnO-FeO-SiO 2 -CaO type, ZnO-FeO-SiO 2 -CaO-ZnO type, the above-mentioned high-zinc slag is put into the electrothermal reduction zone of the suspension smelting electrothermal reduction furnace through the communication channel between the partition wall and the bottom wall of the furnace body, and at the same time...

Embodiment 2

[0077] The difference from Example 1 is that the smelting temperature in the electrothermal reduction zone of the suspension smelting electrothermal reduction furnace is 1300°C.

Embodiment 3

[0079] The difference from Example 1 is that the smelting temperature in the electrothermal reduction zone of the suspension smelting electrothermal reduction furnace is 1450°C, and the electrothermal reduction zone of the suspension smelting electrothermal reduction furnace obtains zinc-containing steam, slag, and lead-containing iron melt.

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Abstract

The invention discloses a suspension smelting electric heating reduction furnace and a method for smelting zinc concentrate. The suspension smelting electric heating reduction furnace comprises a suspension smelting electric heating reduction furnace body, wherein a suspension smelting area and an electric heating reduction area are defined in the suspension smelting electric heating reduction furnace body, a separation wall is arranged between the suspension smelting area and the electric heating reduction area, and the bottom of the suspension smelting area is in communication with the bottom of the electric heating reduction area; an auxiliary burner, a material nozzle, an oxygen-containing gas spray gun and a smelting flue gas outlet are arranged on the smelting area; and an electrode,a reducing agent spray gun, a zinc-containing steam outlet, a slag discharge port and a metal melt outlet are arranged on the electric heating reduction area. Therefore, the suspension smelting electric heating reduction furnace can realize short flow and low energy consumption treatment of the zinc concentrate, and valuable metals such as lead, iron, silver, indium, and germanium are comprehensively recovered; moreover, the zinc element has the high direct yield rate; and meanwhile, obtained furnace slag has the low yield, and can be directly sold as general solid waste.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a suspension smelting electrothermal reduction furnace and a method for smelting zinc concentrate. Background technique [0002] Zinc metal is an important raw material for industry and agriculture. With the progress of society and the development of human beings, the world's demand for zinc resources is increasing rapidly, and the consumption of zinc raw materials is huge. 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 proc...

Claims

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Application Information

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IPC IPC(8): C22B4/08C22B4/04C22B5/16C22B5/10C22B19/04C22B13/02C21B13/12
CPCC22B4/08C22B4/04C22B5/16C22B5/10C22B19/04C22B13/02C21B13/12C21B13/0066
Inventor 李东波黎敏邓兆磊尉克俭茹洪顺曹珂菲吴卫国许良宋言苟海鹏冯双杰李兵
Owner CHINA ENFI ENGINEERING CORPORATION
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