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Method and system for treating ore containing tin, zinc and iron

An iron ore, tin-zinc technology, applied in the field of metallurgy, can solve problems such as difficult separation, lack of large-scale mining and utilization, and complex symbiosis

Pending Publication Date: 2018-03-20
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the extremely complicated symbiotic relationship of the associated metal elements in this mine, and the fine particle size of the embedded distribution, it is difficult to separate tin, zinc and iron, so the selected iron concentrate cannot meet the requirements of blast furnace ironmaking due to the excessive Sn and Zn content. , so it has not been exploited on a large scale in industry

Method used

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  • Method and system for treating ore containing tin, zinc and iron
  • Method and system for treating ore containing tin, zinc and iron
  • Method and system for treating ore containing tin, zinc and iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] The TFe content in the tin-zinc-iron concentrate is 63.51%, the FeO content is 26.54%, the Sn content is 0.25%, the Zn content is 0.21%, and the S content is 0.18%.

[0096] (1) Under the atmosphere of 20% volume concentration of CO, carry out the first reduction roasting treatment to the zinc zinc iron ore containing tin, the roasting temperature is 950 ℃, the roasting time is 30min, the tin and a small amount of zinc in the iron ore are reduced and volatilized, and the obtained Tin roasting products and tin-containing fumes;

[0097] (2) The detinned roasted product is oxidized and roasted in an air atmosphere to obtain a desulfurized roasted product. The roasting temperature is 600°C, and the roasting time is 30 minutes. During this process, the sulfur element is volatilized in gaseous form and recovered through flue gas. , for acid production;

[0098] (3) The desulfurization roasting product and the anthracite with a fixed carbon content of 82.66% are carried out ...

Embodiment 2

[0104] The TFe content in the tin-containing zinc-iron concentrate is 65.23%, the FeO content is 26.54%, the Sn content is 0.36%, the Zn content is 0.27%, and the S content is 0.23%.

[0105] (1) Under the atmosphere of 30% CO volume concentration, the first reduction roasting treatment is carried out to the tin zinc iron ore, the roasting temperature is 1050 ℃, and the roasting time is 23min. The tin and a small amount of zinc in the iron ore are reduced and volatilized, and the obtained Tin roasting products and tin-containing fumes;

[0106] (2) The detinned roasted product is oxidized and roasted in an atmosphere with an oxygen concentration of 25% by volume to obtain a desulfurized roasted product, wherein the roasting temperature is 700 ° C, the roasting time is 22 minutes, and the sulfur element is in gaseous form during this process Volatile, recovered by flue gas, used for acid production;

[0107] (3) The desulfurization roasting product and the anthracite with a fi...

Embodiment 3

[0113] The TFe content in the tin-zinc iron concentrate is 65.70%, the Sn content is 0.28%, the Zn content is 0.17%, and the S content is 0.09%.

[0114] (1) Under the atmosphere of 40% CO volume concentration, carry out the first reduction roasting treatment to the tin zinc iron ore, the roasting temperature is 1100 ℃, the roasting time is 15min, the tin and a small amount of zinc in the iron ore are reduced and volatilized, and the desorbed iron ore is obtained. Tin roasting products and tin-containing fumes;

[0115] (2) The detinned roasted product is oxidized and roasted in an atmosphere with an oxygen concentration of 30% by volume to obtain a desulfurized roasted product, wherein the roasting temperature is 800 ° C, the roasting time is 15 minutes, and the sulfur element is in gaseous form during this process Volatile, recovered by flue gas, used for acid production;

[0116] (3) The desulfurization roasting product and the anthracite with a fixed carbon content of 79....

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Abstract

The invention discloses a method and system for treating ore containing tin, zinc and iron. The method comprises the steps that the ore containing tin, zinc and iron is subjected to first reduction roasting treatment to obtain a tin-free roasted product and tin-containing smoke; the tin-free roasted product is subjected to oxidation roasting treatment to obtain a sulfur-free roasted product and recover sulfur-containing smoke; the sulfur-free roasted product is mixed with a carbon-containing substance to be subjected to second reduction roasting treatment to obtain a reduction roasted productand recover zinc oxide dust; the reduction roasted product is subjected to slag-iron separation treatment to obtain metal iron and tailings; the tin-containing smoke is leached to obtain a zinc-containing leaching solution and a tin oxide; the tin oxide is evenly mixed with the carbon-containing substance and an additive to be smelted to obtain a crude tin product; and the crude tin product is subjected to electrolytic refining treatment to obtain metal tin. Through the method, tin, zinc and iron in the ore containing tin, zinc and iron can be recovered correspondingly.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular, the invention relates to a method and a system for processing zinc-containing zinc iron ore. Background technique [0002] Complex iron ore containing tin and zinc is associated with a large amount of valuable metal elements, which has high development and utilization value and is one of the important iron ore resources today. However, due to the extremely complicated symbiotic relationship of the associated metal elements in this mine, and the fine particle size of the embedded distribution, it is difficult to separate tin, zinc and iron, so the selected iron concentrate cannot meet the requirements of blast furnace ironmaking due to the excessive Sn and Zn content. Therefore, it has not been exploited on a large scale in industry so far. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B7/02C22B25/02C22B5/10C22B19/20C22B19/02C25C1/14
CPCC22B1/02C22B5/10C22B7/006C22B7/02C22B19/02C22B19/20C22B25/02C25C1/14Y02P10/20
Inventor 王欣刘占华丁银贵王岩陈文亮曹志成汪勤亚吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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