Comprehensive recovery method for uranium-containing low-grade polymetallic ores

Abstract

The invention discloses a comprehensive recovery method for uranium-containing low-grade polymetallic ores. The method comprises the following steps that the uranium-containing low-grade polymetallic ores are finely crushed and then is subjected to pre-tailing discarding by using a spiral chute, the spiral chute gravity concentrate is subjected to regrinding and then is subjected to graded shaking table gravity concentration, the betafite lost in a small particle grade is subjected to direct flotation recovery during gravity concentration, the shaking table gravity concentrate is subjected to processes of inhibiting uranium ore flotation, strong magnetic uranium removal and the like to obtain lead concentrate and iron concentrate with qualified radioactivity, and finally the betafite is enriched by a combined method of magnetic separation and flotation. According to the method, comprehensive recovery of various low-grade useful minerals in the uranium-containing low-grade polymetallic ores can be realized, the use amount of flotation reagents can be reduced, the grade of uranium and niobium in the betafite concentrate is greatly improved, and the technological process has the advantages of being environmentally friendly, high in resource recovery rate, low in production cost and the like.

Description

Technical field [0001] The present invention relates to a comprehensive recovery method containing uranium low-grade multi-metal mine, and specifically, a comprehensive recovery method containing uranium low-grade multi-metal mine green high-efficiency mineralization, which belongs to the selection technology. Background technique [0002] There is a large amount of uranium resources in Shaanxi, a large amount of uranium resources, reaching the standard of large uranium deposits, but the uranium position is only 0.016%. NB 2 O 5 The amount of resources is 38,000 tons and 0.021% grades. Lead resources are 889,000 tons, with a grade of 0.49%. The multi-metal deposit is huge, but each having a low grade is lower, all under boundary, and there is no economic benefit. Only high-grade concentrate products that can be economically utilized by mineral pretreatment, while recovering the useful elements and components of accompanying, it may have the value of industrial development. [000...

AI Technical Summary

Problems solved by technology

[0003] The ore of this deposit has the characteristics of complex composition, many types of useful minerals, and radioactivity. According to previous research results, it can be seen that although some progress has been made in the comprehensive recovery of uranium polymetallic ore dressing, there are still a series of problems: The ore is easy to muddy during the grinding process, which affects the recovery rate of useful minerals; the tabelite in the fine mud cannot be recovered; the radioactivity of the lead concentrate and iron concentrate in the mineral processing products exceeds the standard and cannot be sold directly; the uranium in the tabekite concentrate , The enrichment ratio of niobium grade is not high, the processing volume of subsequent hydrometallurgy ore is large, and the production cost is high.

Chinese patent (CN109482336B) discloses a new process for re-separation and recovery of low-grade niobium-titanium-uranium ore, but this invention only pre-enriches useful minerals through re-election, and the grade of useful minerals is low without further separation.

Chinese patent (CN106925433B) discloses a polymetallic ore beneficiation process containing niobium-titanium-uranium ore. This process does not adopt the method of segmental crushing and segmental separation during re-election, and the re-election cost is high and the recovery rate of useful elements is low. , and fine-grained tailings did not use the flotation method to recover uranium, resulting in a low recovery rate of uranium. When recovering uranium, a single flotation method is used, which consumes a lot of flotation reagents and has a great impact on the environment.

Chinese patent (CN108787159B) discloses a comprehensive recovery and beneficiation method of low-grade uranium-containing polymetallic ore. This method is difficult to recover the uranium muddyed in the grinding process during re-election, and does not consider radioactive removal when recovering associated valuable metals , the radioactivity of beneficiation products does not meet the relevant standards, only flotation is used to recover minerals, and the pH of the pulp needs to be adjusted to be acidic, so not only the amount of flotation chemicals is large, but also the flotation equipment and pipelines will be corroded

Images