Dry separation method of manganese carbonate ore

Abstract

The invention discloses a dry separation method of manganese carbonate ore. The dry separation method comprises the following steps: feeding raw manganese carbonate ore into a crushing system for crushing; screening the crushed ore through a double-layer dry-type screening system; according to the screen hole size of the screening system, performing coarse-fraction magnetic separation on the screened ore through a coarse-fraction dry-type magnetic separation system to obtain coarse-fraction concentrate and middling, and performing fine-fraction magnetic separation on the screened ore through a fine-fraction dry-type magnetic separation system to obtain fine-fraction concentrate and tailings, wherein the obtained middling is returned to the crushing system. The dry separation method has the beneficial effects that (1) the process flow is simplified, the ore separation efficiency is improved, and the recovery rate of manganese ore is improved; (2) on the basis of cost reduction, the grading index of concentrate grade is not reduced; (3) energy is saved, consumption is reduced, clean production is realized, and economic benefits are improved; (4) overflowing is avoided, the storage capacity pressure of a tailings pond can be released fundamentally, and meanwhile, final manganese carbonate tailings (waste sands) can be applied to paving or brick-making after being treated.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a method for dry separation of manganese carbonate ore. Background technique [0002] At present, the separation of manganese carbonate ore is usually carried out by wet separation or dry-wet combined magnetic separation. Among them, dry-wet combined magnetic separation is the most used method. It has been proved by practice that this method has the highest metal recovery rate. High recovery rate can reach more than 90% of Mn average, smooth production and operation, low cost per unit consumption, large amount of ore to be processed, etc.; but at the same time, this method needs to use a large amount of clean water, and it needs to be equipped with water pumps, spiral classifiers, Equipment such as thickeners, slurry pumps, and tailings storage facilities have the following problems in large-scale production: 1) high water and electricity consumption, high production c...

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Problems solved by technology

[0002] At present, the separation of manganese carbonate ore is usually carried out by wet separation or dry-wet combined magnetic separation. Among them, dry-wet combined magnetic separation is the most used method. It has been proved by practice that this method has the highest metal recovery rate. High recovery rate can reach more than 90% of Mn average, smooth production and operation, low cost per unit consumption, large amount of ore to be processed, etc.; but at the same time, this method needs to use a large amount of clean water, and it needs to be equipped with water pumps, spiral classifiers, Equipment such as thickeners, slurry pumps, and tailings storage facilities have the following problems in large-scale production: 1) high water and electricity consumption, high production costs; 2) large number of equipment, complex types, and maintenance costs High, long maintenance time, which has a great impact on the continuity of production; 3) The fine-grained tailings (about TMn12%) in the overflow part all run to the tailings pond, resulting in tailings resources of oxide ore and manganese carbonate At the same time, it will be discharged into the tailings pond, which will make it more difficult to separately recycle and utilize manganese resources in the future; 4) There are relatively large hidden dangers in the safety and environmental protection of the tailings pond, and the limited storage capacity of the tailings pond will affect further development; 5) After mineral processing High drying cost in ore grinding process

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