Beneficiation method for preparing kyanite ores

Abstract

The invention specifically relates to a beneficiation method for preparing kyanite ores. The technical scheme includes that step one, the kyanite ores with certain particle sizes are subjected to ore grinding; step two, ore slime which is less than 0.020 mm in ground ore pulp is removed through a desliming bucket; step three, the desliming ore pulp is subjected to continuous wet type strong magnetic sorting; step four, the kyanite ore pulp which is subjected to the strong magnetic sorting is subjected to reselection through a table concentrator to obtain coarse particle kyanite ore concentrates; and step five, a flotation selection process is used for tailings of the table concentrator to obtain fine particle kyanite ore concentrates, and the coarse particle kyanite ore concentrates and the fine particle kyanite ore concentrates are combined and subjected to treatment of acid leaching and iron impurity removing to finally obtain the kyanite ore concentrates. The beneficiation method for preparing the kyanite ores has the advantages of being simple in technological process, easy to operate in scene and low in cost; the grade of aluminum oxide of the obtained kyanite ore concentrates is over 58 wt. %, the recovery rate of kyanite is over 70%, requirement of the country-levelkyanite ore concentrate standard can be satisfied, and the kyanite ore concentrates can be used as high-level refractory materials or raw materials of other industrial products.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a mineral processing method for preparing kyanite ore. Background technique [0002] Kyanite is a high-alumina mineral, which can be used as high-grade refractory materials, refractory mortar, cement and casting resistant products. The content of kyanite in kyanite ore is generally below 30%, which cannot be directly used in industrial production. In order to increase the content of aluminum oxide and reduce the impurities in it to the standard of industrial production, the ore of kyanite should be beneficiated. [0003] With the expansion of industrial utilization, the demand for kyanite concentrate continues to grow, and its growth rate is generally 5-7% per year, and the growth rate in the iron and steel industry is 10% per year. In the development and utilization of kyanite, there is a situation that the product is not in line with the market demand. T...

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Problems solved by technology

The flotation process of kyanite mainly includes two-stage crushing-one-stage grinding-one-stage strong magnetic-shaking table gravity separation-flotation; crushing-grinding-second-stage magnetic separation-flotation; the disadvantage of these processes is the low recovery rate , The yield is low, and it is difficult to obtain high-purity kyanite concentrate that reaches the national first-class product

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