Flotation machine is applicable to grading of non-ferrous and ferrous metal, also applicable to grading of nonmetals, such as coal, fluorite and talc. The impeller of flotation machine is driven by motor v-belt, centrifugal effect is thus produced and negative pressure is formed, which, on the one hand, absorbs adequate air to mix with ore pulp, and on the other hand, stirs the ore pulp and mixes the ore pulp with medicines and refine bubbles; thus, the minerals will be adhered to the bubbles and float to the pulp surface and form foam layer. Adjust the opening of flash board and cone valve and control the liquid level to make the useful bubbles scraped out by scraper blade. For selection of flotation machines, the following information shall be indicated: Models, specifications and number of flotation cells. Number of scraper blade devices (left or right). Single-side scraping or double-side scraping. Numbers of feed boxes, middling boxes, tailing boxes, feed pipes and middling pipes. Liquid level can be controlled manually, electrically or automatically. Deployment diagram of flotation technological process should be provided.

BF flotation machine is an improved model of SF flotation machine with the following features:
The impeller is composed of closed double truncated cones and can produce strong lower cycle of ore pulp;
Large air inflow and low power consumption;
Each cell is equipped with triple functions: air suction, pulp suction and flotation; it forms a flotation circuit by itself with no need for any auxiliary equipment; it is deployed horizontally in favor of change of flow path;
Reasonable ore pulp circulation, which reduces settlement of coarse sand to the greatest extent;
It is equipped with automatic and electric control devices for control of ore pulp liquid level, making adjustment very convenient;

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