A kind of flotation method of rhodochrosite

Abstract

The invention relates to a flotation method of rhodochrosite. Ore is ground first to obtain fine ore; manganese sulfate is added into the fine ore for size mixing, then a first inhibitor and a first oxidation ore collector are added for uniform mixing, and flotation is conducted to obtain rougher tailings; a second oxidization ore collector is added into rougher tailings, and scavenging is conducted 2-5 times to obtain scavenged tailings and scavenged concentrates; the scavenged concentrates are returned to last-level operation in sequence; manganese sulfate and a second inhibitor are added into the scavenged tailings, concentration is conducted 2-5 times, obtained foam products are calcium carbonate concentrates, and the finally obtained product tailings are rhodochrosite concentrates. The method solves the problems that flotation separation of high-calcium manganese ore is difficult, the separation effect is poor, and the recovery rate of manganese concentrates is low. The recovery rate of manganese in the flotation method can reach 92% or above. According to the method, most of calcium carbonate is removed in advance, the grade of the manganese concentrates is increased, the content of calcium carbonate in the manganese concentrates is reduced, and convenience is provided for reducing the production cost of subsequent electrolytic manganese operation.

Description

technical field [0001] The invention belongs to the field of high-efficiency comprehensive utilization of resources, and relates to a flotation method of rhodochrosite, in particular to a flotation method of low-grade rhodochrosite. Background technique [0002] Foreign manganese ore resources are excellent, and high-quality manganese ore products can be obtained only by simple beneficiation. The natural endowment of manganese ore resources in my country is poor. In order to obtain qualified manganese ore concentrate, the common method is to crush and finely grind the manganese ore to obtain suitable particle size products, and then use single or combined processes such as gravity separation, magnetic separation, and flotation to process the manganese ore. Manganese ore is sorted; if the obtained manganese concentrate is manganese carbonate, it needs to be reduced or neutrally roasted to improve the manganese grade of the ore. [0003] The combined process of rhodochrosite o...

AI Technical Summary

Problems solved by technology

Among them, flotation is an effective method to improve the recovery rate of fine-grained minerals. Because the surface of manganese carbonate is easily wetted by water, the floatability is poor, and the cost of flotation is high, and the operation is difficult to control. Therefore, flotation is rarely used in carbonic acid. In the industrial production of manganese ore, domestic and foreign scholars' research on manganese ore flotation mainly focuses on theoretical research

Due to the weak basic research on manganese mineral flotation, the technical research lacks the support of basic theory, making it difficult to realize technological innovation, and some key problems in the process of manganese mineral flotation separation have not been well resolved.

There are main technical bottlenecks in the manganese ore flotation technology: ①The embedded particle size is fine, most of which are below 20 μm, and the rhodochrosite has poor floatability; ②Inevitable ions such as calcium, magnesium, iron, and aluminum in the pulp seriously affect the flotation process, and the surface transformation is serious. The surface of rhodochrosite has the properties of calcium carbonate, magnesium carbonate, and manganese carbonate; ③The selectivity of flotation agents is not high, and it is difficult to separate manganese carbonate from calcium carbonate and apatite; ④Because the mineral particle size is very fine and the surface electrical properties are opposite , leading to serious heterogeneous agglomeration, especially the agglomeration with silicon-containing minerals, poor selective separation of manganese minerals and gangue minerals;

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