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 pho...

AI Technical Summary

Problems solved by technology

However, there are obvious deficiencies in the positive and negative flotation process in the prior art: ① There are many types of flotation reagents, and sodium carbonate, water glass, calcium lignosulfonate or S711 should be added as regulators for positive flotation, and oxidized paraffin wax soap, etc. Reverse flotation also needs to add acid as adjusting agent and collector; ② The amount of flotation agent is large, first of all, the alkali consumption is large, the sodium carbonate consumption is generally above 4kg / t, and the corresponding acid consumption is also large. Since the reverse flotation needs to be carried out in a weakly acidic medium, while the positive flotation is carried out in an alkaline medium, it takes more energy to adjust the pulp from alkaline (pH 9-10) to weakly acidic (pH 5-6) ③The temperature of the flotation pulp is high, and the positive flotation pulp generally needs to be heated to above 42°C, resulting in high energy consumption; It is difficult to recycle waste water; ⑤The cost of mineral processing is high, due to factors such as large amount of chemicals and heating flotation, the cost of mineral processing is high, which makes the industrialization of this process difficult

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