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Beneficiation process for pulverized mine of specularite in alpine region

A technology for mirror iron ore in alpine regions, which is applied in the field of beneficiation technology of mirror iron ore powder in alpine regions, can solve the problems of uneven ore reduction, high roasting cost, and difficulty in industrial production, and achieves uniform and thorough particle roasting. The effect of eliminating the blockage of the mine silo and effectively and rationally using it

Active Publication Date: 2017-01-18
MCC NORTH (DALIAN) ENG TECH CO LTD
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AI Technical Summary

Problems solved by technology

Due to the small gaps in the powdery ore, the air cannot circulate, so the shaft furnace roasting can only be used for the roasting of lumpy ore
Although the rotary kiln can achieve full-grain roasting, the production practice of roasting powdered ore in the rotary kiln shows that the roasting of the rotary kiln takes more than 60 minutes, the ore is not uniformly reduced, the roasting cost is high, the equipment investment is large, and the heat utilization rate is low. Material, fuel, water content, roasting atmosphere, temperature, etc. are strictly required, and precise control is required, otherwise it is easy to form kiln rings, which makes it difficult for industrial production to go smoothly. Therefore, rotary kiln roasting specular iron ore has not been used in industrial construction in my country.

Method used

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  • Beneficiation process for pulverized mine of specularite in alpine region

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Embodiment Construction

[0024] The specific embodiments of the present invention will be further described below in conjunction with the drawings.

[0025] Such as figure 1 As shown, the beneficiation process of specularite fines in the high-cold area of ​​this embodiment consists of beneficiation steps before roasting, magnetic levitation roasting, and beneficiation after roasting, which are specifically carried out according to the following steps:

[0026] (1) Beneficiation before roasting: the crushed specularite ore with a particle size of ≤12mm is sent to the pre-roasting beneficiation system for a ball milling-classification operation and a dewatering operation before roasting, and the discharge of a ball mill is fed to a cyclone group for classification. , The overflow of the first-stage cyclone group is fed into the high-frequency fine sieve for classification. The sieving particle size of the high-frequency fine sieve is 0.3mm. The top of the high-frequency fine sieve and the sedimentation of th...

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Abstract

The invention belongs to the technical field of iron ore beneficiation, and in particular relates to a beneficiation process for pulverized mine of specularite in an alpine region. The method provided by the invention comprises the steps of beneficiation before roasting, suspended magnetization roasting and beneficiation after roasting. According to the method, the recorded granularity of materials, in the step of beneficiation before roasting, which are fed into suspended Bayer is less than or equal to 0.3 mm, and adapts to the suspended magnetization roasting process, the beneficiation index of the pulverized mine of the specularite is further increased through the step of beneficiation after roasting, the pulverized mine antifreezing problem is solved, filtering operation in the alpine region is effectively realized, and the beneficiation process has the advantages of energy conservation and environmental friendliness.

Description

Technical field [0001] The invention belongs to the technical field of iron ore beneficiation, and particularly relates to a beneficiation process for specularite fines in high-cold areas. Background technique [0002] There are abundant specular iron ore in the Jiayuguan area of ​​Gansu, my country. The main types of ore industries in this area are specular iron ore, specular iron siderite mixed ore and specular iron limonite mixed ore. Among them, the optional minerals specularite and limonite are weakly magnetic minerals. The current beneficiation method is two-stage grinding-strong magnetic roughing-roughing tailings coarse subdivision-strong magnetic re-separation. The JISCO concentrator adopts this method The final iron concentrate grade is 45.46%, Si0 2 The grade is 11.66%, and the iron recovery rate is 65.3%. Practice shows that the process has low metal recovery rate and poor quality concentrate. In order to improve the iron recovery rate and grade of specularite, reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00C22B1/02
CPCB03B9/00C22B1/02
Inventor 李国洲
Owner MCC NORTH (DALIAN) ENG TECH CO LTD
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