SU833318A1 - Method of controlling classification process in helical classifier - Google Patents

Description

The invention relates to methods for intensifying the process of classifying particles of crushed material by size produced in mechanical spiral classifiers, and can be used mainly in the mining industry. The quality of the enrichment processes is directly dependent on the density of the discharge and the particle size distribution of the solid particles included in it.

There is a known method of classifications carried out by means of a spiral classifier, including the formation of a pulp volume in the lower part of the bath with a constant mirror area and the direction of its movement to the end threshold, the deposition and transportation of large particles, and the evacuation of enrichable size classes into a drain ’

However, the method does not provide efficient depositing of sand pulp particles, therefore, a discharge containing difficult to reach particles not only reduces the efficiency of flotation or magnetic separation, but also causes the mills to be overloaded before grinding.

• There is also a known method of regulating the classification process in a spiral classifier, which consists in forming a pulp stream and зации stabilizing the drain density of the classifier 12].

The disadvantage of this method is the low-quality classification process in the processing of complex ores.

The purpose of the invention is to improve the quality of the classification process.

The goal is achieved in that the density of the classifier is stabilized by regulating the area of the pulp mirror in proportion to the density · power of the classifier. In addition, the pulp goth is sent diagonally to the pulp mirror along a path passing under the shafts of the classifier spirals.

The method is as follows.

The initial pulp of a given density is formed into a stream in the lower part of the classifier bath! The flow of pulp is directed diagonally on the pulp mirror along a path passing under the shafts of the classifier spirals. With an increase in the density of the starting material, the area of the pulp mirror increases by 3 JT in proportion to the change in the supply density.

The proposed method for regulating the classification process allows to increase the extraction of metal from complex sulfide ores by 0.25%, which at an annual productivity of 10 million tons gives an economic effect of 180 thousand · r.

I

Claims (2)

     . . The invention relates to methods for intensifying the process of classifying particles of crushed material by size, produced in mechanical spiral classifiers, and can be used mainly in the mining industry. The quality / enrichment process is directly dependent on the density of the particle size distribution of the solid particles contained in it. There is a known method of classification carried out through the spiral classifier, including the formation of a pulp volume in the lower part of the bath with a constant Mirror area and its direction to the end threshold, sedimentation and transportation of large particles and evacuation suitable for enrichment of the coolness classes into the drain fll . However, the method does not provide effective deposition of sand particles of the pulp, therefore a drain containing hard particles does not only reduce the efficiency of flotation or magnetic separation, but also causes overloading of the mills before grinding. There is also a known method for regulating the classification process in the spiral classifier, which consists in simulating pulp flow and stabilizing the drain density of the classifier t2. The disadvantage of this method is the poor quality classification process for the enrichment of complex ores. The purpose of the invention is to improve the quality of the classification process. The goal is achieved by the fact that the density of the discharge of the classification of a catcher, stabilized by regulation of the areas of the pulp mirrors, is proportional to the class flesh-feed. Kpof of this, the ROTOCK of the pulgai directs the pulp mirrors diagonally along a trajectory passing under the shafts of the classifier spirals. The method is carried out as follows. The initial pulp of a given density is formed into a stream at the bottom of the bath class | Catcher1 The pulp flow is directed diagonally through the pulp mirror along a trajectory that passes under the shafts of the classifier spirals. With an increase in the density of the starting material, the area of the pulp mirror increases in proportion to the change in the density of the feed. The proposed method of regulating the classification process makes it possible to increase the extraction of metal from complex sulfide ores by 0.25%, which, with an annual productivity of 10 MLN.t. gives an economic effect of 180 thousand rubles. Claims The method of regulating the classification process in the spiral classifier consists in forming a pulp flow and stabilizing the classifier drainage density, which, in order to improve the quality of the classification process, the classifier discharge density is stabilized by adjusting the pulp mirror area in proportion to the classifier's density, Thereby, the pulp flow is directed diagonally through the pulp mirror along a trajectory passing under the shafts of the classifier spirals. Sources of information taken into account during the examination 1. Taggart LF Handbook of mineral processing. M., Metallurgizdat, 1950, Vol. 2, p. 783. 2. Processes and machinery for mineral processing. M ,, Nedra, 1974, .-. With. 529.