Technique for processing high-iron-carbonate mixed ore

Abstract

The invention relates to a technique for processing high-iron-carbonate mixed ore. The technique for processing the high-iron-carbonate mixed ore is characterized in that the stage grinding technique and the weak magnetic-strong magnetic-centrifugal machine technique are adopted, and separate grinding and separate screening are carried out on the high-iron-carbonate mixed ore. The technique for processing the high-iron-carbonate mixed ore has the advantages that the weak magnetic technique, the strong magnetic technique and the centrifugal machine technique are allocated flexibly and reasonably according to specific screening indexes of work to recover iron carbonate and hematite in raw ore, environmental pollution is light, the technological process is simple, and qualified iron ore concentrate which has the iron grade of more than 65% after sintering and is capable of meeting smelting requirements can be obtained.

Description

technical field [0001] The invention belongs to the technical field of beneficiation technology, in particular to a technology for processing mixed high carbonate iron ore. Background technique [0002] At present, the main iron minerals of the lean iron ore processed by each dressing plant are hematite, magnetite, false ore, iron carbonate and iron silicate, among which hematite is the main iron mineral. Iron ore is mostly sorted by "stage grinding, coarse and fine separation-gravity, magnetic and floating combined process", and lean iron ore mainly with lean magnetite is mostly separated by "single magnetic separation process" or "magnetic, magnetic Flotation combined process" for selection, and for iron carbonate minerals and iron silicate minerals due to their low grade, and when the content of iron carbonate minerals is high, there is an adverse effect on the flotation process. Therefore, for iron carbonate content Higher iron ore could not be effectively utilized in t...

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Problems solved by technology

For high iron carbonate mixed ores with an iron carbonate distribution rate of more than 30%, it is difficult to reduce the iron carbonate content in the reverse flotation feed to below 2% due to the use of step-by-step flotation, and it is impossible to eliminate the impact of iron carbonate on hematite. Therefore, for iron carbonate mixed ores with magnetic iron minerals and iron carbonate minerals with different particle sizes embedded in the iron carbonate distribution rate of more than 30%, it is impossible to adopt the existing step-by-step flotation and other processes. Obtain qualified iron ore concentrate that meets smelting requirements

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