Separation process of ferrous high silicate type iron ore

Abstract

The invention discloses a separation process of ferrous high silicate type iron ore. The process includes classifying, degrading tailings and upgrading. Tailing degrading includes S1 tailing degrading and S2 tailing degrading. The separation process has the advantages that the process is free of calcination and reverse floatation, short is process flow, low in process management requirement, low in operation cost, low in environmental pollution and suitable for industrial production; the iron grade of fine ferrous silicate type iron concentrate is increased, silicon content is lowered, the grade of fine high silicate type iron tailings is lowered, the grade of the iron concentrate is increased by about 10%, and the silicon content is lowered by about 10%; the iron ore in the tailings can be recycled effectively, the comprehensive grade of total tailings is lowered from 16.2% to about 10.53%; the separation process is environmental friendly, low in energy consumption, low in cost, high in fining and concentration degree, and capable of effectively increasing comprehensive resource utilization rate, increasing benefits, saving energy and reducing emission.

Description

technical field [0001] The invention belongs to the technical field of mineral engineering, and in particular relates to a beneficiation process of iron-containing high silicate type iron ore. Background technique [0002] The phased characteristics of my country's economic and social development and the national conditions of resources determine the large consumption of iron ore resources in my country, the serious shortage of domestic iron ore supply, and the increase in iron ore imports year after year. In 2012, my country's iron ore raw ore output was 1.1 billion tons Above, the total amount of imported iron ore reached 743 million tons, and the foreign dependence rate was as high as 67%, which brought a serious crisis to the healthy and stable development of my country's steel industry and became a major security risk for the country's economic development. [0003] The Dahongshan mining area is a large-scale iron ore deposit discovered in 1959 by volcanic eruption magma...

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Problems solved by technology

[0008] In terms of iron tailing reduction research at home and abroad, it is mainly aimed at ores with coarse particle size, gangue and iron minerals with large differences in specific gravity and specific magnetic susceptibility coefficient, and mainly use high-intensity magnetic field equipment, magnetic gravity composite force field equipment, etc. ; The research on improving the quality of iron ore concentrates mainly on the reverse flotation desiliconization collector; although, a lot of research work has been done on the efficient and comprehensive utilization of iron ore resources at home and abroad, and some good research results have been obtained , but due to the regionality and complexity of iron ore resources, there is still a lot of work to be done, especially for fine-grained hematite and limonite, gangues are iron-containing silicate minerals, silicic acid There are few studies on the efficient and comprehensive utilization of Dahongshan iron ore resources with very similar specific magnetic susceptibility and specific gravity between gangueite and red limonite

[0009] At the same time, the most important thing is that the current research on tailing tailing reduction and concentrate upgrading and impurity removal for refractory iron ore resources are regarded as two independent processes, and the research is carried out separately; the main problem caused by it is that both It is difficult to grasp the balance point between the two, and it is easy to cause complex processes, low equipment utilization efficiency, and poor separation indicators; domestic and foreign targets for magnetite and hematite in concentrate upgrading and silicon reduction or tail reduction Breakthrough progress made in one aspect, usually the research only focuses on one aspect, and has certain limitations

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