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A combined process treatment method for high-iron and low-tin oxide ore

A high-iron, low-tin, and treatment method technology, which is applied in the field of non-ferrous metallurgy and mineral processing, can solve the problems of tin and iron resources that have not been effectively utilized, difficult separation of tin and iron in mineral processing technology, poor selectivity, etc., to achieve good application and promotion prospects, simplified beneficiation process and low production cost

Active Publication Date: 2011-12-07
YUNNAN TIN GROUP HLDG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] To sum up, due to the complex properties of high-iron and low-tin ores and poor selectivity, it is difficult to effectively separate tin and iron by a single beneficiation technology, and tin and iron resources have not been effectively utilized

Method used

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Experimental program
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Effect test

Embodiment 1

[0020] Raw ore properties of high iron and low tin oxide ore: chemical composition, Sn0.58%, Fe47.00%, S0.026%, As0.040%, SiO 2 10.41%, Al 2 o 3 9.51%, CaO0.241%, MgO0.154%. The raw ore is crushed to 2mm particle size analysis, the yield of 0.074mm grade is 44.58%, the tin metal rate is 40.51%; the 0.010mm particle size yield is 29.09%, the tin metal rate is 20.51%. Useful minerals are mainly cassiterite, with a mineral content of 0.31%. Metal minerals are mainly hematite, clay, and iron-stained clay, with a mineral content of 54.23%. Non-metallic minerals are mainly quartz and feldspar, accounting for Amount 5.25%. The distribution rate of cassiterite tin accounts for 84.62%, and the distribution rate of acid-soluble tin accounts for 15.38%. Part of tin is in the form of fine grains, fine grained cassiterite embedded in hematite, iron stained clay, clay, and gangue minerals. The grain size of cassiterite crystals varies greatly, and the symbiosis relationship between cas...

Embodiment 2

[0023] Raw ore properties of high iron and low tin oxide ore: chemical composition, Sn0.66%, Fe41.92%, S0.54%, As0.352%, SiO 2 15.69%, Al 2 o 3 3.23%, CaO0.211%, MgO3.06%. The primary particle size analysis of the raw ore shows that the yield of 0.074mm grade is 35.68%, and the tin metal rate is 53.55%; the yield of 0.010mm particle size is 15.12%, and the tin metal rate is 6.77%. Tin element mainly occurs in the form of cassiterite, accounting for more than 95% of the total. The distribution rate of tin in visible cassiterite accounts for 73.02%, the distribution rate in limonite accounts for 11%, and the distribution rate in iron stained clay and clay ore accounts for 12%. When the ore is broken to 1mm, 22.70% tin is still wrapped in limonite and other minerals in the form of fine particles. Iron element mainly occurs in limonite, accounting for more than 95% of the total iron. Tin and iron are slightly symbiotic, and it is difficult to separate tin and iron, which is a...

Embodiment 3

[0026] Properties of tin stockpiling tailings: chemical multi-element analysis, Sn0.35%, Fe25%, Pb0.22%, Cu0.43%, SiO 2 27.10%, CaO7.64%, Al 2 o 3 8.01%, MgO1.935%. The particle size analysis of the sample shows that the yield of 0.074mm grade is 57.5%, and the tin metal rate is 59.92%; the yield of 0.010mm particle size is 15.97%, and the tin metal rate is 11.55%. Tin is dominated by cassiterite, whose tin content accounts for more than 90% of the total tin; iron is mainly limonite, followed by hematite and earthy iron minerals; It is about 45%, and the rest are densely symbiotic with iron minerals such as limonite and hematite, and mainly exist in the form of inclusions, and the particle size diameter is between 0.005 and 0.030mm. The monomer dissociation degree of the 0.074mm particle size of the sample is 25.31%, and when the particle size reaches 0.037mm, the monomer dissociation degree reaches 83.71%. The symbiosis relationship of cassiterite in this sample is comple...

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Abstract

The invention relates to a treatment method for refractory high-iron and low-tin oxide ore, which belongs to the technical field of nonferrous metal metallurgy and ore dressing. The technological process of the present invention is: crushing and grinding the ore, adding reducing agent and binder to make pellets, drying, roasting, crushing, and then wet grinding, and using a magnetic separator to select magnetic minerals Iron concentrate, to obtain iron concentrate products containing more than 60% iron, non-magnetic minerals are sorted by gravity separation equipment such as a shaker, to obtain qualified tin concentrates containing more than 40% tin and tin-rich minerals containing more than 4% tin For medium ore products, the total recovery rate of tin reaches 65-75%. The method adopts the combined process of metallurgy and ore dressing, which greatly improves the recovery rate of tin metal, and at the same time obtains an iron ore concentrate product, simplifies the ore dressing process, has short process, low production cost, and is environmentally friendly, and can greatly increase the yield of tin and iron metals. Recovery rate, effective use of limited resources, has good application and promotion prospects.

Description

technical field [0001] The invention relates to a treatment method for refractory high-iron and low-tin oxide ore, which belongs to the technical field of nonferrous metal metallurgy and ore dressing. Background technique: [0002] High-iron and low-tin oxide ore is a common oxide vein tin ore in tin ore, containing 0.3-1% tin and 35-55% iron; its mineral composition is complex, and useful minerals are mainly cassiterite, and metal minerals are mainly Hematite, limonite, clay, and iron-stained clay are mainly; non-metallic minerals are mainly quartz, feldspar, kaolinite, mica, and calcite. In the ore, tin mainly exists as cassiterite, cassiterite tin accounts for 80-95% of the total tin content, acid-soluble tin (or isomorphic in the dispersed state) accounts for 15-5%, tin metal is fine-grained, fine-grained Clothed and wrapped in other minerals; iron mainly exists in hematite, limonite, clay, iron-stained clay, trace pyrite and magnetite, iron minerals and tin in the ore ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/00C22B1/02C22B25/02
Inventor 仇云华潘基泽王炜
Owner YUNNAN TIN GROUP HLDG
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