SU1676655A1 - Method of jigging of manganese-bearing ores - Google Patents

Abstract

The invention relates to the enrichment of minerals and m. used at concentrating plants of mining and coal industry. The goal is to intensify the separation process and reduce energy consumption by measuring the apparent density of the bed and reducing energy consumption. The method includes supplying the source material, dividing it in a pulsating flow of energy carrier on an artificial bed, withdrawing the heavy fraction down through the graduation and light through the threshold. In this case, the energy carrier is affected by a force field of pulses in the direction opposite to the direction of unloading of the heavy fraction. The ratio of the speed of the pulses to the speed of the discharge portion of the heavy fraction is from 0.5 to 0.95. This increases the looseness of the bed and reduces the consumption of energy. This increases the apparent density of the bed and increases the efficiency of jigging. Yo

Description

The invention relates to the enrichment of minerals, in particular to gravity enrichment by the method of jigging, and can be used in the beneficiation plants of the mining and coal industries.

The purpose of the invention is to intensify the separation process and reduce energy consumption by changing the apparent density of the bed and reducing the consumption of energy.

The method includes supplying the source material, dividing it in a pulsating flow of energy carrier on an artificial bed, withdrawing the heavy fraction down through the bed and the light fraction through the threshold, with

In this case, the energy carrier is affected by the force field of the pulses and the direction of the impact is opposite to the direction of the unloading of the heavy fraction when the ratio of the speed of the pulses and the speed of the heavy particles being discharged is from 0.5 to 0.9.

The apparent density of the bed in the jigging machines is (average) 2600 kg / m3 and is formed from the actual density of the bed material and the degree of its watering due to pulsations of energy carriers.

During the generation of shock pulses into the pyramidal part of the jigging machine, the shock

Os X | About Os

eaten

impact on the sieve on which the bed is placed. In this case, each sieve hole becomes an independent source of radiation of acoustic pulses directly into the bypass bed.

Due to the force impulse effect on the bed, the mobility of its individual elements is increased, which eliminates jamming of the grains of the enriched material in the bed while reducing its water content. Reducing the water cut makes it possible to obtain an apparent density of 2800 kg / m3, which is optimal for the separation of manganese ores and improves the efficiency of the separation of ores,

Power pulses most effectively influence the process of depositing manganese ores if the ratio of the average speed of the generated pulses to the average speed of the heavy fractions discharged is in the range of 0.5-0.95.

A decrease in the ratio of the speeds below the selected value of 0.5 will lead to an insufficient effect of the energy engines on the bed and, as a consequence, to its reduced looseness. This causes low concentrate output and high water consumption.

An increase in the intensity of pulses, determined by the ratio of the speeds of the pulses and the unloaded heavy fractions, more than 1.0, leads to a sharp decrease in the yield of the concentrate (heavy fractions), moreover, this results in a substandard concentration of manganese. This is due to the fact that the intense impact of acoustic pulses on the bed and unloaded heavy fractions, on the one hand, leads to increased bed loosening and mixing of the material on the sieve, and on the other hand, reduces the number of unloaded heavy fractions due to the fact that

, 0,

where UIMP - impulse speed :.

ikontz - the speed of the discharged concentrate, the resultant forces applied to the piece of ore will be directed

up, opposite with respect to the direction of unloading, But it is necessary to answer that at the same time significantly, the specific consumption of energy carrier drops.

The method is carried out as follows.

The initial manganese oxide ore with a particle size of 8 mm was applied to the sieve of the JMPM-8 jigging machine, on which the artificial

bed height of 90 mm and size 30-45 mm. The parameters of the jigging mode were supported as follows: the oscillation frequency of the energy carrier is 2.5 Hz; speed 28 cm / s, consumption per 1 ton of enriched material

1.5 m; frequency of silos acoustic pulses generated is 33 Hz, single impulse energy 1.2 kJ, pressure at the front of pulse propagation 15 OMP, average value of pulse velocity vector

is 0.2 m / s, the average value of the velocity vector of the unloaded heavy fraction was 0.25 m / s, and their ratio was 0.8.

As a result, a concentrate was obtained with a manganese content of 43.9% at a yield of 44.8%.

Claims (1)

Claims A method for depositing manganese-containing ores, including feeding the raw material, dividing it in a pulsating flow of energy on an artificial bed, withdrawing a heavy fraction down through the bed and a light fraction through the threshold, which is known to intensify the separation process reducing energy consumption by changing the apparent density of the bed and reducing energy consumption, the latter is influenced by a force field of pulses, In this case, the direction of action is opposite to the direction of unloading of the heavy fraction 0.5-0.95.