System and method for uniformly mixing fine crushed coal slime with coarse grain lump coal

Abstract

The invention relates to the technical field of uniform mixing of coal slime and lump coal of a coal preparation plant and specifically relates to a system and method for uniformly mixing fine crushed coal slime with coarse grain lump coal. The system comprises the following working systems: the fine crushed coal slime uniformly falls onto a continuously running total clean coal belt; three layers of squirrel cage type mixers are arranged along the motion track of the materials on the inclined lower side of a discharging end of the total clean coal belt; under the combined action of an outer layer of stirrer, a middle layer of stirrer, an inner radial rib and a central sleeve of the three layers of squirrel cage type mixers, the uniform mixing of the materials is realized; the uniformly mixed materials are transferred and conveyed to a product cabin through an upper cabin belt; and a left material guiding plate, a middle material guiding plate and a right material guiding plate are respectively arranged on the left, middle and right positions along the motion direction of the belt at the discharging end of the upper cabin belt and have the function of dispersing the falling points. The system provided by the invention is reasonable in process layout, equipment selection and structure design, is capable of uniformly mixing the materials and is reliable and stable in effect.

Description

technical field [0001] The invention relates to the technical field of uniform mixing of coal slime and lump coal in a coal preparation plant, in particular to a system and method for uniformly mixing finely crushed coal slime and coarse lump coal. Background technique [0002] The filter press is the gatekeeping equipment for the dehydration and recovery of fine-grained coal in the coal preparation plant. The filter cake of filter press slime has the characteristics of high viscosity, high moisture, and sticks into a cake. In order to make the press filter slime have better sales prices and channels, it is generally necessary to crush it and then evenly mix it with other coal preparation products. In the flotation process, if the flotation effect is affected by various factors, the quality of the flotation clean coal filter press slime will fluctuate in a certain range. In order to make the flotation clean coal slime have a better and more stable sales channels, which even...

AI Technical Summary

Problems solved by technology

The filter cake of filter press slime has the characteristics of high viscosity, high moisture, and sticks into a cake. In order to make the press filter slime have better sales prices and channels, it is generally necessary to crush it and then evenly mix it with other coal preparation products. In the flotation process, if the flotation effect is affected by various factors, the quality of the flotation clean coal filter press slime will fluctuate in a certain range. In order to make the flotation clean coal slime have a better and more stable sales channels, which evenly mix flotation clean coal slime and heavy separation clean coal into a homogeneous product for sale; another example is the filter cake of tailing coal slime filter press, which is usually crushed and evenly mixed with medium coal to form a homogeneous product for sale Coal preparation plants generally adopt a single mixer to uniformly mix coal slime and lump coal now, such as the "mixer" disclosed in Chinese patent document CN104437188A; the following problems generally exist in the current technology, 1. rely too much on the work of the equipment itself Performance, neglecting to provide good working conditions for the equipment from the process system, ②The method is not perfect, and the material has the phenomenon of rebonding into blocks during the subsequent transportation and blanking process

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