Method for recovering fine-grained cassiterite

Abstract

The invention discloses a method for recovering fine-grained cassiterite. According to the method, a sulfur mixed collecting agent and a tin mixed collecting agent are used for desulfurization and tinselection respectively, the collecting effect of the two mixed collecting agents is good, and compared with a traditional collecting agent, the cost is low. The method includes the steps that sulfurroughing is carried out, then sulfur roughing tailings are subjected to one time of roughing, two times of concentration and two times of scavenging of cassiterite, and tin concentrate is obtained; the sulfur roughing concentrate is subjected to two times of sulfur concentration after graded desliming to obtain sulfur concentrate. According to the method, desulfurization and flotation of the cassiterite are separately carried out, so that fine sand in the sulfur roughing concentrate cannot be circulated in flotation of the cassiterite. On the one hand, the technical process prevents the fine sand in the sulfur roughing concentrate from entering flotation of the cassiterite, so that the chemical consumption of the fine sand is avoided, and the production cost is reduced; on the other hand,the grade and operation recovery rate of the cassiterite are improved, and by means of the technical process, the sulfur concentrate with relatively high grade and the tin concentrate with relativelyhigh grade and recovery rate are obtained.

Description

technical field [0001] The invention relates to a method for recovering fine-grained cassiterite, which belongs to the technical field of mineral processing. Background technique [0002] Tin is a rare and precious non-ferrous metal with a long history of application and a wide range of application fields. The content of tin in the earth's crust is very low, only 0.004%. Among the more than 50 kinds of tin-containing minerals that have been discovered so far, only cassiterite can be used to produce metallic tin. Tin mines are mainly distributed in China, Indonesia, Brazil and other countries. my country is rich in tin resource reserves, the total amount of which ranks first in the world, mainly concentrated in Yunnan, Guangxi, Hunan, Inner Mongolia, Guangdong and Jiangxi provinces. The resource reserves of these six provinces account for 97.89% of my country's total resources, among which Gejiu in Yunnan is known as The "tin capital" of our country. [0003] Among the tin-...

AI Technical Summary

Problems solved by technology

The existence of fine mud in the flotation process directly affects the effect of flotation. The existence of fine mud not only increases the cost of reagents, hinders the interaction between reagents and minerals, but also increases the pressure of the flotation machine, directly affecting the concentration of concentrates. grade and recovery

[0004] At present, cassiterite collectors are mainly divided into fatty acids and hydroxamic acids. Fatty acid collectors are mainly used for the flotation of tin ores with relatively simple mineral composition and quartz as the main gangue, and need to be adjusted appropriately Hydroxamic acid collectors have good selectivity and strong collection ability, but the cost is high

Images