Desliming jigger and coal preparation

Abstract

A method for concentrating coal with jig washer to remove mud features that a coal-water separator is installed to ordinary jig washer, and includes such steps as setting up jig washer, starting system, adding crude coal, regulating the water quantity to be added to coal-water separator, and dressing according to density. Its content of ash for coal concentrate can be controlled as required.

Description

Technical field [0001] The present invention relates to a mineral processing equipment and a mineral processing method thereof, in particular to a coal preparation jig and a coal preparation method thereof. Background technique [0002] At present, the jigs used for coal preparation at home and abroad are as contained in pages 204 to 226 of the book "Mineral Processing" published by China University of Mining and Technology Press in October 2002, and as contained in China Coal Industry Press in 1993. The German Bardock series jigs, the former Soviet Union's OM-type jigs, the Japanese NU-type jigs and the Chinese X-series jigs contained in the "Coal Preparation Handbook" published in April The jig machine, the SKT series jig machine in China, etc., and a kind of compound air chamber jig machine disclosed in Chinese patent ZL022820205, and a kind of multi-frequency jig machine disclosed in Chinese patent ZL021568855, all because the jig machine is working The water layer in t...

AI Technical Summary

Problems solved by technology

[0002] At present, the jigs used for coal preparation at home and abroad are as contained in pages 204 to 226 of the book "Mineral Processing" published by China University of Mining and Technology Press in October 2002, and as contained in China Coal Industry Press in 1993. The German Bardock series jigs, the former Soviet Union's OM-type jigs, the Japanese NU-type jigs and the Chinese X-series jigs contained in the "Coal Preparation Handbook" published in April The jig machine, the SKT series jig machine in China, etc., and a kind of compound air chamber jig machine disclosed in Chinese patent ZL022820205, and a kind of multi-frequency jig machine disclosed in Chinese patent ZL021568855, all because the jig machine is working The water layer in the upper layer of the middle bed is thin. On the one hand, the looseness of the bed may not be enough. The heavy fine particles are not easy to separate in the process of layering according to the density. The phenomenon that large particles entrain small heavy particles flow out; on the other hand, because the flow velocity is too fast, fine-grained minerals or fine mud flow rapidly in the water, and the maximum particle size washed away by the upper water flow increases greatly, and the coarse particles that enter the concentrate after sorting The impurity content is high, and the cleanliness of clean coal is low; moreover, due to the mixture of coarse and fine concentrate on the sieve and the mixed discharge of coal preparation water, it increases the difficulty of separating low-ash coarse-grained minerals and high-ash fine-grained minerals

Therefore, these jigs have been used for a long time due to the poor separation of fine-grained minerals. The raw ore containing a large amount of fine-grained minerals cannot be separated, or the ash content of the concentrate after separation is too high to meet the needs, or after separation The pollution of the concentrate by the fine mud reduces the proper quality of the concentrate, which in practice increases the difficulty of the operation of the jig, reduces the washing effect of the jig, and limits the scope of use of the jig

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