Method for regrinding copper slag flotation middling
A copper slag and flotation technology, applied in the direction of solid separation, recycling technology, mechanical material recovery, etc., can solve the problems of low fineness of selection, buried flotation machine, and difficulty in flotation of minerals, so as to improve the fineness of selection , solve the effect of easy sinking and flotation foam stability
Inactive Publication Date: 2016-10-12
CHUXIONG DIANZHONG NON FERROUS METALS LLC
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Problems solved by technology
Due to the large specific gravity of slag (4.1 tons / cubic) and relatively hard hardness (Mohs hardness 7-9 degrees), the fineness of the pulp entering flotation is low (-325 mesh is about 60%). , leading to: 1. It is easy to sink in the flotation process, and the flotation machine will be buried; 2. The flotation foam is unstable, and it is difficult for the flotation staff to operate; 3. The useful minerals do not reach monomer dissociation. Useful minerals are difficult to float out, and the technical indicators of mineral processing (recovery rate, concentrate grade, copper content in tailings, etc.) are not ideal
Method used
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Embodiment 1
[0013] The medium ore in the selected section is transported to the slurry pool by the submerged slurry pump, and then transported from the slurry pool to the cyclone through the slurry pump, and then classified by the cyclone to obtain coarse-grained slurry (with a particle size greater than 325 mesh) ) and qualified pulp (grain size ≤ 325 mesh content greater than 70%); coarse-grained pulp enters the second-stage mill for re-grinding, and then flows into the pulp pool after grinding to form a closed-circuit grinding; qualified pulp enters the first stage of roughing through the mixing tank Continue flotation, that is to realize the regrinding of ore in flotation.
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Abstract
The invention discloses a method for regrinding copper slag flotation middling. The first stage of fine-selected middling is conveyed to a slime dam through a submersible slurry pump and then conveyed to a swirler from the slime dam through a slurry pump to be classified, and large-grained slurry and qualified slurry are obtained through classification; the large-grained slurry enters a second stage of grinding to be reground, ground slurry then flows into a slime dam again, and therefore a closed-loop middling grinding is formed; the qualified slurry enters a first stage of rough selecting through a stirring barrel to continue to be subjected to flotation, and then regrinding of flotation middling is achieved. According to the method, valuable minerals are sufficiently subjected to monomer separation, and the feed size of slurry is increased; the valuable minerals are sufficiently subjected to monomer separation, floatability of the valuable minerals is enhanced, flotation foam is stable, and flotation workers can easily conduct operation. The copper concentration recovery rate is increased to 93.00%, the copper concentrate grade is improved to 25.00%, the copper content of tailings is reduced to 0.28%, and the phenomenon that sedimentation in a tank easily happens in the flotation process and a flotation machine is buried completely is eliminated.
Description
technical field [0001] The invention relates to a copper slag flotation ore separation and regrinding method. Background technique [0002] Copper slag separation is to process mixed copper slag composed of converter slag and electric furnace slag. Copper slag separation process includes crushing, grinding, flotation and dehydration steps. The whole system meets environmental protection requirements, no waste discharge, water recycling, no external The processing capacity reaches 700t / d, and the annual processing capacity is about 230,000 tons; the selection of copper slag can comprehensively improve the recycling value of solid waste, increase the economic and social benefits of the enterprise, and realize the recycling and reuse of green economy . [0003] The flotation section also includes the following processes: roughing first stage, roughing second stage, sweeping first stage, sweeping second stage, fine selection first stage and fine selection second stage. At pres...
Claims
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IPC IPC(8): B03B9/06
CPCB03B9/061Y02W30/52
Inventor 惠兴欢王礼珊杨春银张鑫朱江孙双荣张正洪任军祥
Owner CHUXIONG DIANZHONG NON FERROUS METALS LLC