Multi-metal ore-separating and ore-grinding grading optimization test method

Abstract

The invention discloses a multi-metal ore-separating and ore-grinding grading optimization test method. The method includes the steps of determining a sample source and carrying out sampling, carrying out multi-metal ore-separating and ore-grinding grading circuit current situation analysis, analyzing influence factors of a primary ore-grinding process, carrying out a secondary steel forging and steel ball comparison ore-grinding experiment, adopting a primary grinding industrial test scheme ball loading system, adopting a secondary grinding industrial test scheme, debugging an industrial actual test and analyzing an industrial test result. The multi-metal ore-separating and ore-grinding grading optimization test method includes the steps of multi-metal ore embedment characteristic analysis, ore mechanical performance testing and researching, steel ball diameter calculation carried out when ore is broken and accurate ball loading experiment verification. According to the method, steel ball unit consumption is reduced, work noise of a grinding machine is lowered, work efficiency is improved, the utilization coefficient, the primary grading sand return ratio, grading quality efficiency and grading quantity efficiency of the grinding machine are improved, the qualified granulometric class is increased by 2-6 percentage points, the ratio of excessively crushed ore is reduced by 2 percentage points, and the quality characteristic of secondary overflowing products is improved.

Description

technical field [0001] The invention belongs to the technical field of polymetallic grinding and classification, and in particular relates to an optimization test method for polymetallic grinding and classification. Background technique [0002] In mechanical equipment, ore grinding is the operation of reducing the particle size of the ore by means of the impact and grinding of the medium (steel ball, steel rod, gravel) and the ore itself until it is ground into powder. The purpose is to make the ore The useful minerals and gangue minerals can be dissociated to the maximum to provide materials that meet the requirements of the next beneficiation process in terms of particle size. Grinding can be divided into media grinding and medialess grinding (self-grinding) as well as dry grinding and wet grinding. After the grinding products are classified, if the unqualified part returns to the original mill, it is called closed-circuit grinding; if it does not return to the original ...

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Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide a polymetallic ore dressing and grinding classification optimization test method, aiming to solve the problem of single consumption of steel balls, high working noise and power of the mill, and the utilization of the mill in the traditional multi-metal grinding and classification test method. coefficient, the first-stage grading sand return ratio, low grading quality efficiency and grading volume efficiency, high over-grinding rate, poor product characteristics of the second-stage overflow, etc.

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