Main Phases of Flotation Separation
Flotation separation is generally defined as generic term of ore pulp flowing through every operation in flotation separation process of ores with the use of jaw crusher. Various processes are applied to the treatment of ores of different types. Therefore, process can reflect the technological features of the treated ores. So, the process is called as flotation technological process。
Definition of this method is: separate various helpful minerals in proper order. With its feature of high flexibility, it can adapt the change of ore grade, especially for sulphide ore of high grade. Xilin, Fankou, Lechang lead-zinc dressing plant of our country, and Laisvall lead-zinc dressing plant of Sweden all adopt this method.
Firstly, get mixed concentrate through the emersion of all useful minerals in ores; secondly, separate various helpful minerals in sequence from mixed concentrate cone crusher. These two steps together are called part of amalgamate flotation Flowsheet. This process is suitable for treat raw ores of complex structure, fine embedded grains, and low content of sulfide mineral, which are in close symbiosis relationship. Because this process can simplify process, reduce ores’ over grinding, so as to benefit separation. Almarc Lead-zinc plant of former Soviet Union adopts preferential flotation this process. By using this process, we can get higher index than preferential flotation improve 10% of lead concentrate ore grade and 4.5% of zinc concentrate ore grade, raise the rate of multipurpose utilization from 75.4% to 83.7%, and double labor productivity. Qingchengzi zinc-lead ore dressing plant and Xiaotieshan copper ore dressing plant of our country adopt this process.Jaw crusher:http://www.crusher-machine.com/1.html
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We can get mixed concentrate by the emersion of two useful minerals in ores together, then separate single concentrate from the mixed concentrate. The two stages together are called part of amalgamate flotation Flowsheet, which is the most widely used process in production. It is quite economical to adopt this process when raw ores contain low-grade nitrogen, copper-lead, copper-zinc, and lead-zinc.
The aim of choosing principle process of flotation is to make sure the stages of flotation process and flotation sequence of helpful minerals. In practice, stage of flotation is decided by stages of ore grinding and its relation with flotation process. Generally, one-stage flotation process and multi-stage flotation process are divided. One-stage flotation: Grind ores into required size once, and then select final concentrate through flotation. Thereinto, grinding process can be one stage or several continuously stages. Ore grinding process and flotation process are in sequence of ‘rough to fine’. Through grinding process, useful minerals of different embedded sizes are dissociated, and then be selected through flotation process. There are three situations of these two processes: (1) grinding and separation again of tailing; (2) grinding and separation again of rough concentrate; (3) grinding and separation again of middlings.
According to minerals’ flotability in ores, mineral assemblages of good, medium and worse flotability are separated through flotation separation. Secondly, different helpful minerals are selected out from all mixed concentrates, which is called iso-flotability flotation process. For example, Huangshapinng lead-zinc ore dressing plant of our country, and Zheskaz of former Soviet Union both adopt this process.
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