Method for using refined coal magnetic separator tailings for flotation water-spraying foam removal

Abstract

The invention discloses a method for using refined-coal magnetic separator tailings for flotation water-spraying foam removal. The method provides an improvement method aiming at characteristic of first-section overflowing refined coal products of a three-product heavy-medium cyclone, which comprises the following steps of: separating, removing the medium, recycling the medium, and using the refined-coal magnetic separator tailings for the flotation water-spraying foam removal. Therefore, the method is suitable for the characteristic of the refined-coal magnetic separator tailings of the first-section overflowing refined coal products of the three-product heavy-medium cyclone, and is particularly suitable for the technical reform of the refined-coal magnetic separator tailings in a coal preparation plant in which the content of fine granular materials (-0.5mm) is high.

Description

technical field [0001] The invention relates to a coal preparation process, in particular to a clean coal magnetotail used for flotation water spray defoaming method. Background technique [0002] China is the world's largest coal producer and consumer, with coal reserves of 991.56 billion tons, accounting for about 70% of primary energy production and consumption, of which 84% are directly burned as thermal coal. The main energy structure will not change for quite a long time in the future. As the largest developing country in the world, China has sustained rapid economic development in the past 20 years, and the demand and consumption of energy have increased rapidly, and the environmental problems caused by the use of coal have become more and more prominent. With the gradual improvement of my country's environmental protection regulations and standards, the future energy composition will slowly tilt towards clean energy such as natural gas, hydropower, and nuclear energ...

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Problems solved by technology

[0009] At present, the clean coal magnetic tail treatment process that is widely used has the following characteristics: ① The clean coal magnetic tail is first sent into a clean coal magnetic tail bucket, and a large clean coal magnetic tail bucket is located on the first floor, occupying a relatively large area. Large space, the capital investment cost is also very large; ②After the clean coal magnetotail passes through the classification device, the fine-grained coal is sent to the flotation system for separation, which increases the load of the flotation machine; ③The flotation machine uses The defoaming spray requires the use of circulating water, which further increases the load of the subsequent coal slime dehydration process

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