A kind of beneficiation method of gravity separation and reverse flotation decalcification of high-calcium fine-grained mica-type vanadium ore

Abstract

The invention discloses a beneficiation method for gravity-selection reverse-flotation decalcification of high-calcium fine-grained mica-type vanadium ore. The beneficiation method includes the following steps: crushing the raw ore to a particle size of ‑2 mm, mixing the crushed ore with water to form a pulp, introducing the pulp into a shearing and stirring device for a certain period of shearing and stirring, and then entering the hydraulic The cyclone is used to re-select the ore pulp, and the cyclone overflow product and the cyclone sedimentation product are obtained by re-election; the cyclone overflow product is decalcified by reverse flotation in an alkaline environment using the sulfide amine method. This method effectively avoids the entrainment problem of the traditional fatty acid decalcification method, greatly reduces the cost of mineral processing agents, and the mineral processing wastewater can be recycled; the grade of the treated vanadium concentrate is effectively improved, and the content of acid-consuming substances CaO is greatly reduced, which can greatly reduce The cost of smelting has good economic and social benefits.

Description

technical field [0001] The invention relates to the field of beneficiation technology, in particular to a beneficiation method for gravity separation and reverse flotation decalcification of high-calcium fine-grained mica-type vanadium ore. Background technique [0002] Vanadium is an important iron and steel smelting additive. The vanadium smelting process mainly includes: sodium roasting, alkali leaching, calcification roasting, and acidification treatment; the serious environmental pollution of the sodium roasting process has been strictly prohibited. The alkali leaching process has a great impact on the silicate content. The high ore effect is not ideal. The calcification roasting process requires that the CaO content in the raw material should not be higher than 10%, and the acidification treatment process requires that the CaO+MgO content in the raw material should not be higher than 10%. Because of the economic cost of smelting, the current CaO Content 10-25%, V 2 o ...

AI Technical Summary

Problems solved by technology

Due to the high content of primary ore slime, directly grinding it will lead to high slurry viscosity and a sharp increase in the thickness of the cover layer on the surface of the steel ball, resulting in a decrease in grinding efficiency and serious unevenness in the thickness of the grinding product. In this case, it is difficult to use Flotation achieves mineral separation, resulting in a great waste of resources

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