A self-adaptive matching method for control parameters of cross-arranged rod medium high-gradient magnetic separator

Abstract

The invention discloses a self-adaptive matching method for control parameters of a crosswise-arranged rod medium high-gradient magnetic separator. The self-adaptive matching method comprises the following steps that S1, a two-dimensional simplifying model of a rod medium set magnetic field is built, and the magnetic field is divided into a plurality of identical hexagon units to be analyzed; S2,distribution of magnetic field force in an effective capturing area of magnetic particles in the model is calculated; S3, the critical value of a capturing oval is calculated, and the capturing area of the magnetic single particles is determined; S4, according to the critical value of the capturing oval, concentrate separation indexes including the concentrate recycling rate, yield and grade are predicted; and S5, the control parameters of the high-gradient magnetic separator are adjusted, the concentrate recycling rate, yield and grade are calculated and compared under different magnetic media, different pulp concentrations, different flow rates and different background field intensity, and the control parameters suitable for the high-gradient magnetic separator for concentrate separationare determined. The high-gradient magnetic separation efficiency can be pre-estimated effectively, accordingly, a suitable separation scheme is established, and the number of simulating test times isdecreased greatly.

Description

technical field [0001] The invention relates to the technical field of mineral processing equipment, in particular to an adaptive matching method for control parameters of a medium high-gradient magnetic separator with cross-arranged rods. Background technique [0002] Gradient magnetic separator is currently the key equipment for sorting (micro) fine-grained weak magnetic metal ores (iron oxide ore, wolframite, wolframite, etc.) Applications. The efficiency of high gradient magnetic separation is related to the type of collection medium and filament size. Rod media are adopted by many high-gradient magnetic separators because of their advantages of high reliability, easy realization of optimized combination and arrangement, and no clogging. Numerous magnetic separation experiments also show that the separation efficiency of cross-arranged rod media combination is higher than that of other combinations. . At present, the magnetic field analysis, design and development of ...

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Problems solved by technology

[0003] In the actual high-gradient magnetic separation process, since the movement of weakly magnetic ore particles involves many influencing factors, the relationship between the main influencing parameters (pulp concentration, flow velocity, background field strength) and the ore supply mostly depends on the method of small-scale experiments. It is determined that these guidance capabilities for high-gradient magnetic separation practice need to be improved, and it is difficult to achieve modular control

According to the expected value of the strong magnetic separation grade index and the actual value of the basic control loop, Chai Tianyou and others optimized the set value of the basic control loop of the strong magnetic separation process, and adopted a dynamic compensation method to effectively suppress various unknown disturbances on the separation process. The adverse effect is aimed at improving the concentrate grade and reducing the tailings grade, but this method cannot initially set the control parameters of the high gradient magnetic separation equipment

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