A kind of high-quality and impurity-reducing mineral processing method for strong magnetic minerals

Abstract

The invention provides a method for improving the quality and reducing impurities of strong magnetic minerals. The method includes beneficiation of strong magnetic minerals. The beneficiation includes the following steps: 1) adding flotation agents to the rough concentrate to adjust the slurry, coarse The weight of the ore with a particle size of -0.074mm in the concentrate accounts for 80-90% of the total weight; the flotation agent includes a collector and an inhibitor; 2) the result of step 1) is added to the floating agglomeration electromagnetic concentration equipment, and the control The magnetic field strength of the floating reunion electromagnetic concentrating equipment is 11.94kA / m-63.69 kA / m, the magnetic field change period is 2-6 seconds, and the rising water velocity is 2-6cm / s. The invention can obtain high-quality strong magnetic mineral products, and can significantly reduce the impurity content; the invention significantly shortens the beneficiation process of strong magnetic minerals, and has huge market economic benefits.

Description

technical field [0001] The invention belongs to the field of beneficiation of magnetic minerals, in particular to a method for improving the quality and reducing impurities of strong magnetic minerals. [0002] technical background [0003] Iron is the most commonly used metal in the world, accounting for more than 95% of total metal consumption. Due to the large-scale development of iron ore resources in my country, there is an increasing shortage of easy-to-select magnetite resources, so deep mining is required, and mining costs are gradually increasing. At present, magnetite beneficiation usually adopts continuous multi-stage magnetic separation device for separation, and finally becomes iron concentrate powder after being separated by magnetic separation column. There are also a few concentrators that use reverse flotation to separate iron concentrate powder. The flotation process has a large number of sorting stages and is complex in process. Generally, a process of rou...

AI Technical Summary

Problems solved by technology

For example, the ore dressing plant in Panzhihua mining area of ​​Panzhihua Iron and Steel Co., Ltd. was built in the 1970s. At the beginning of the plant, three stages of open circuit crushing, one stage of closed circuit grinding and classification, and three stages of weak magnetic separation and iron separation were used to produce iron concentrate with an iron grade of TFe51.5%. , after the efforts of several generations of Panzhihua Iron and Steel Group, in 2005, the concentrator completed the transformation of stage grinding and stage separation. After the transformation, a three-stage closed-circuit crushing process, two-stage closed-circuit grinding, and three-stage weak magnetic separation iron separation process were formed. Production The iron grade of the iron concentrate is about 54%. Although the iron concentrate currently produced has been greatly improved compared with the initial stage of plant construction, the iron grade of the iron concentrate is not high and the impurity content is high. The high level will affect the economic value of vanadium-titanium iron concentrate utilization and seriously restrict the development and utilization of vanadium-titanium iron resources in Panxi

[0004] For the process of improving the quality and reducing impurities of such strong magnetic minerals, the traditional method is to use a drum-type weak magnetic separator for multiple selections and then reverse flotation through a flotation machine to reduce Si, S, and P in the rough concentrate. Equal impurity content, complex process and high cost

Images