Collophanite direct flotation and reverse flotation technique

Abstract

The invention relates to a positive-negative floatation technology for cellophane, which comprises the following steps: subjecting siliceous-calcareous collophane ore to breaking and grinding process to dissociate ore monomer; adding water to it get ore pulp with concentration of 20 -50%; Leading the mixture to agitated tank; adding modifying agent sodium silicate and positive collector agent to ore pulp; processing the mixture in positive floating system to get foamed product; adding negative floatation agent inorganic acid and collector agent to the foamed product in negative flotation agitated tank; processing the mixture in negative floating system with carbonate vein mineral negative flotation to get foamed product as negative flotation debris and product in tank as clean ore. The invention can simplify process, deduce cost and recycle the water.

Description

technical field

[0001] The invention relates to a phosphate ore beneficiation process, in particular to a forward and reverse flotation process suitable for middle and low-grade sedimentary siliceous-calcium colloidal phosphate rock. Background technique

[0002] Phosphate minerals are important chemical raw materials. With the development of social technology and economy, the demand for phosphate rocks continues to increase, while the reserves of easy-to-mine rich ore and easy-to-select phosphate rocks are decreasing day by day. Therefore, how to effectively and economically enrich the poor and refractory phosphate rock has attracted widespread attention in the world's phosphate rock industry. Especially the beneficiation technology of sedimentary siliceous-calcium collophosite with large reserves and difficult beneficiation is more eye-catching. Sedimentary phosphorite ore (the phosphorus-containing mineral is collophoste) is the most important phosphate rock in the world...

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