Method for improving quality of mineral processing and production capacity of magnetite concentrating mill

Abstract

The invention belongs to the technical field of iron ore beneficiation, specifically relates to a method for improving quality of mineral processing and production capacity of magnetite concentrating mill. The method firstly introduces the magnetite ore into 1-3 grinding stages in original grinding and sorting system. The overflow size P80 value for each section of cyclone is set as high as 1.2-1.5 times value required by existing grinding and sorting system. The concentrate products of weak magnetic separator in end section are delivered into elutriation separator with two stages. The elutriation magnetic concentrate on first stage and second stage are merged as the final iron concentrate products that the grade is 67.8%-68% and rate of recovery is 74%-80%. The method for improving quality of mineral processing and production capacity of magnetite concentrating mill achieves the purpose of improving quality and enlarging capacity through the adding grinding and sorting system after the original grinding and sorting system, can make the best of original plant space and have the advantages of simple process, saving energy and less investment with the expansion as the same as original production line for improving quality and enlarging capacity.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation, and in particular relates to a method for improving the beneficiation quality and production capacity of a magnetite beneficiation plant. Background technique [0002] At present, the grinding process of most magnetite concentrators is to reduce the amount of ore grinding in the next stage of grinding through weak magnetic separation tailing before the next stage of grinding, so as to achieve the purpose of energy saving, that is, the beneficiation process of stage grinding stage selection, This process has a wide range of applications. Because magnetite itself is magnetic, the grade and recovery rate of the separation are relatively high. The iron concentrate products obtained from the ore dressing are generally used as pellet raw materials, and the grade of the iron concentrate is generally above 67%. The factory was built earlier, and the technological level is backward. The gr...

AI Technical Summary

Problems solved by technology

There are also some concentrators not only with low concentrate grade, but also due to the fluctuation of ore properties, the processing capacity of the grinding system, especially the mill, cannot meet the design requirements, resulting in the processing capacity of the entire concentrator not meeting the requirements. In this case, the general approach of the concentrator is to build a new production line of the concentrator, reduce the processing capacity of the original production line, and further sacrifice the processing capacity of the original production line to ensure the production index of the final iron concentrate. This method has high investment and high energy consumption. Big

Images