A method for preparing iron concentrate for ironmaking from tin-containing iron ore

A technology of iron concentrate and iron ore, which is applied in the field of comprehensive utilization of tin-containing iron ore, can solve the problems of equipment requirements for polluting the environment, long roasting time, and high vulcanization temperature, and achieve the effects of safe operation, low cost, and low roasting temperature
CN104152671BActive Publication Date: 2016-05-25CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2016-05-25

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Abstract

The invention discloses a method for preparing iron ore concentrate for ironmaking from tin-containing iron ore. The method comprises the following steps: mixing the tin-containing iron ore and a sodium carbonate additive according to a certain ratio, agglomerating, drying, and performing reducing roasting under proper temperature and reducing roasting atmosphere; and separating magnetite concentrate by combining an ore grinding-magnetic separating method, and filtering and separating sodium stannate solution and filter residues from remaining nonmagnetic matters. The method is simple in process flow, mild in process conditions, low in cost and environmental friendly, particularly effective separation between tin and iron in the tin-containing iron ore is realized, the iron recovery rate is high, the content of tin in the obtained iron ore concentrate is low, and the iron ore concentrate can serve as a raw material during blast furnace ironmaking.
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Description

technical field

[0001] The invention relates to a method for comprehensive utilization of tin-containing iron ore, in particular to a method for preparing iron concentrate for ironmaking from tin-containing iron ore, belonging to the fields of mineral processing and iron and steel metallurgy. Background technique

[0002] my country is rich in iron ore resources. With the depletion of high-grade iron ore resources and the rising price of imported iron ore, it is necessary to increase the development and utilization of complex and refractory iron ore resources. Tin-bearing iron ore is a typical complex iron ore with abundant reserves. It is mainly distributed in Inner Mongolia, Guangxi, Hunan, Yunnan and other provinces. It generally contains 30% to 55% iron and 0.13% to 0.5% tin. Excessive tin content will seriously affect the smooth operation and operation system of the blast furnace. Therefore, for the large-scale application of this resource, tin (Sn content below 0.08%)...

Claims

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