SU1060793A1 - Method of averaging loose materials - Google Patents

Abstract

METHOD FOR HANDLING MATERIALS LIBRARY, which includes dividing the raw material feed stream before feeding into the averaging bunker at least into two streams of granulometric composition, into smaller and larger KpyrtHocTH streams, averaging each stream and combining them prior to the subsequent processing from them. , in order to reduce the cost of averaging and subsequent processing by ensuring uniform flow of bulk materials from the bins, after separating the flows from the stream having a smaller size, uina-Q particles and sand fraction, with the sand fraction being returned (O to the averaging bin, and sludge particles are removed.

Description

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The invention relates to ore preparation and can be used for averaging the qualitative composition of bulk materials, in particular, ores mined by underground or open pit mining.

The known method of averaging bulk materials consists in dividing the initial stream into two streams, temporarily shifting one of them relative to the other and then combining them jjlj.

The disadvantage of this method is that it does not imply removal of fractions that interfere with averaging from the streams.

The closest to the proposed technical essence and the achieved result is a method of averaging bulk materials, including the separation of the initial flow of raw materials before feeding into the averaging bunker at least two streams of granulometric composition, smaller and larger flows, averaging each stream and combining them Yerd subsequent processing M.

This method provides a fairly effective averaging of the material on the particle size distribution. However, with the release of the smallest-sized material containing sludge, clay particles, there is a sharp decrease in the effectiveness of averaging, due to the fact that fines lead to material sticking to the bunker walls and other containers and cause arching. Vaults above the outlets prevent the outflow of material, which causes difficulties in obtaining a combined flow of a given capacity. Small fractions, as a rule, contain the richest in quality material. Consequently, fluctuations in flow performance with the smallest fineness usually lead to a significant deterioration in averaging over the total flow. In addition, sludge particles present in the richest fines fraction themselves appear to be a harmful component. Further in the flotation. These machines, they reduce their productivity, cause an increase in the consumption of reagents and, ultimately, increase the cost of the average and concentration processes.

The purpose of the invention is to reduce the cost of averaging and subsequent (the processing of mineral raw materials by ensuring equal flow of loose materials from the bunker.

The goal is achieved by the fact that, according to the averaging method

bulk materials, including the separation of the initial stream of raw materials before feeding into the averaging bunker at least two streams of granulometric composition, into streams of smaller and larger size, averaging each stream and combining them before subsequent processing, after separating the streams from the stream having a smaller particle size, the sludge particles and the sand fraction are separated, the sand fraction is returned to the averaging bin / and the sludge particles are removed.

The method is carried out as follows.

The initial stream of raw material to be averaged is fed to the workshop of the preliminary large-scale crushing, where the material becomes convenient for further processing. At this stage, the selection of the main volume of sludge. Then, the crushed material, according to the proposed method, is divided by size in devices known in enrichment. ; For this purpose, screening and washing barabbat can be used. The purpose of this processing is to process cocTOHt raw materials in the separation from the material of the fraction with the smallest size. The maximum size of a piece in this fraction may vary in the range of 20-40 mm and depends on the equipment used. This fraction is a mixture of crushed ore (useful component), waste rock (harmful component) and chunks formed as a result of the aggregation of unground ore with slimes.

The lumpy material remaining after the washing stage goes further to the workshop of medium and fine crushing, and then to the averaging bunker. Since it is now mostly free of dust and clay particles, this material stably flows out of the outlet orifices, when storing it is less prone to segregation and sticking to the walls of the bunker, which makes it possible to effectively balance the averaging process.

The fraction separated in the wash drum contains a sufficiently large number of useful components and these components are separated by the removal of the sludge - which is carried out as follows. From the washing drum, the material flow with mit and immersion size is directed to classifiers, for example, spiral type. In classifiers, further material separation by size and partial destruction of lumps-aggregates occurs. In this case, the slurry particles go into suspension and with the discharge of the classifier enter into hydrocyclones. The sand part is directed to the same averaging bunker, where the mass of the material is stored. The size of the sand fraction after the spiral classifiers makes up the ice and impairs the operation of the bunker. The drain of the classifier is a suspension of suspended in water slurry particles and a certain amount of ore particles with a particle size of 1 mm. The final removal of sludge and the extraction of the useful component from the suspension is carried out in hydrocyclones. The sand part after this separation stage enters the averaging bun. core, and discharge - either to the pulping plant or to the waste (depending on the content of the useful component),, -,,,. ,; -

I Thus, a gradual accumulation of clay-free mate ria occurred in the bunker; After averaging, this material will unite, is fed with the material averaged by the pulp mixers, and directed to. further processing.

The averaging of mineral raw materials in accordance with the proposed method can be carried out not only in two tanks: in a bunker and a pulper mixer, but also in a larger number of averaging devices. A variant is available in which in one bunker, lumpy material enters (immediately after one-: walkie-talkie) f a.in the other - the whole fine-grained material - And the Peskov part of the material, separated in classifiers, hydrocyclones, etc. It is only important that no Isham particles are contained in the bunker.

According to the proposed method, a high efficiency of averaging a reduction in the cost of enriching the drive is achieved due to the exclusion of shlish particles from the technological process. As a result, a well-flowing material is stored in the average bunker, the averaging of which is easily realized by known methods, and the flotation does not require an increased consumption of reagents for the separation of useful and harmful components.

Claims (1)

METHOD FOR AVERAGING BULK χ MATERIALS, which includes dividing the initial feed stream before feeding into the averaging hopper into at least two flows according to particle size distribution, into flows of smaller and larger sizes, averaging each stream and combining them before further processing, differentiation and with the fact that, in order to reduce the cost of averaging and subsequent processing by ensuring the uniformity of the flow of bulk materials from the bunkers, after the separation of streams from the stream having a smaller size, allocate shla- movye _of particle sand fraction and $ a sand fraction is recycled in the homogenization tank, and the slurry particles are removed.