Quality improvement and impurity reduction ore dressing method of ferromagnetic minerals

Abstract

The invention provides a quality improvement and impurity reduction ore dressing method of ferromagnetic minerals. The method is characterized in that the ferromagnetic minerals are cleaned, and the cleaning process comprises the following steps: 1, adding a flotation agent to crude concentrates, and carrying out size mixing, wherein the weight of ores with the granularity of 0.07-4mm in the crude concentrates is 80-90% of the total weight of the crude concentrates, and the flotation agent comprises a collector and an inhibitor; and 2, adding a material obtained in step 1 into a floating agglomeration electromagnetic cleaning device, and controlling the magnetic field intensity of the floating agglomeration electromagnetic cleaning device to be 11.94-63.69kA / m, the magnetic field transformation period to be 2-6s and the rising water flow speed to be 2-6cm / s. The method allows high-quality ferromagnetic mineral products to be obtained, greatly reduces the content of impurities, greatly shortens the ore dressing process of the ferromagnetic minerals, and has huge market economic benefit.

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. technical background [0002] 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 roughing, f...

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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

[0003] 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

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