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System and method for smelting zinc concentrate and zinc-containing secondary material

A zinc concentrate and material technology, applied in the field of metallurgy, can solve problems such as secondary pollution, large equipment investment, and low productivity, and achieve the effects of small footprint, large melt volume, and high recovery rate

Pending Publication Date: 2020-07-17
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the alkaline leaching process has problems such as low productivity, refractory leach solution and leaching residue, resulting in secondary pollution, etc.
The acid leaching process has problems such as large equipment investment, secondary pollution caused by difficult treatment of leaching liquid and leaching residue

Method used

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  • System and method for smelting zinc concentrate and zinc-containing secondary material
  • System and method for smelting zinc concentrate and zinc-containing secondary material
  • System and method for smelting zinc concentrate and zinc-containing secondary material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] refer to Figure 9, zinc concentrate (containing Zn: 50.1wt%), zinc-containing secondary material (steel soot, containing Zn: 20wt%) and flux (FeO, SiO 2 and CaO) are mixed according to the mass ratio of 7:2:1, and the obtained mixture is directly added into the material inlet provided by the jet smelting zone of the jet smelting electric reduction furnace, and the oxygen-enriched air (the oxygen volume concentration in the oxygen-enriched air is 80%) It is injected by the oxygen-containing gas lance in the jet smelting zone, and then the mixture is contacted with oxygen-enriched air for oxidative smelting (melting temperature is 1200°C), to obtain sulfur-containing smelting flue gas and high-zinc slag, and the sulfur-containing slag obtained in the jet smelting zone The smelting flue 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-...

Embodiment 2

[0081] The difference from Example 1 is that the smelting temperature in the electrothermal reduction zone of the jet smelting electrothermal reduction furnace is 1350°C.

Embodiment 3

[0083] The difference from Example 1 is that the smelting temperature in the electrothermal reduction zone of the jet smelting electrothermal reduction furnace is 1450°C, and the electrothermal reduction zone of the jet smelting electrothermal reduction furnace can obtain zinc-containing steam, slag and iron-containing melt.

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Abstract

The invention discloses a system and method for smelting zinc concentrate and a zinc-containing secondary material. The system comprises a mixing unit and a jet smelting and electric heating reductionfurnace. The mixing unit is provided with a zinc concentrate inlet, a zinc-containing secondary material inlet, a flux inlet and a mixed material outlet. A jet smelting area and an electric heating reduction area are defined in the jet smelting and electric heating reduction furnace, a partition wall is arranged between the jet smelting area and the electric heating reduction area, the bottom ofthe jet smelting area communicates with the bottom of the electric heating reduction area, the jet smelting area is provided with a material inlet, an oxygen-containing spray gun and a smelting smokeoutlet, the material inlet is connected with the mixed material outlet, and the electric heating reduction area is provided with an electrode, a reducing agent spray gun, a zinc-containing steam outlet, a slagging port and a metal melt outlet. By adopting the system, the zinc concentrate and the zinc-containing secondary material can be treated in a short process at low energy consumption, valuable metal such as lead, iron, silver, indium and germanium can be comprehensively recycled, and the zinc element has high direct recycle rate.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a system and method for smelting zinc concentrate and zinc-containing secondary materials. 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 demand for zinc resources in the world is increasing rapidly, and the consumption of zinc raw materials is huge. The zinc metal industry is facing the crisis of no ore mining and a shortage of raw material supply. my country is the world's largest producer of zinc. my country produces almost 50% of zinc products with less than 20% of the world's zinc resource reserves. Due to over-exploitation, my country's high-grade sphalerite reserves are almost exhausted. Since 2000, my country's net export of zinc, including zinc in alloys, has been gradually decreasing, and China's zinc supply has turned from surplus to shortage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B4/04C22B4/08C22B5/16C22B13/02C21B13/00C22B19/04
CPCC22B4/04C22B4/08C22B5/16C22B13/02C21B13/00C22B19/04
Inventor 李东波黎敏邓兆磊宋言茹洪顺曹珂菲吴卫国许良苟海鹏冯双杰李兵
Owner CHINA ENFI ENGINEERING CORPORATION
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