A Consumption Reduction Technology of Iron Tailings Slurry Intermittent Grinding

Abstract

The present invention relates to a process for intermittent grinding of iron dressing tailings slurry to reduce consumption. The process includes the following steps: (1) Storage: the iron dressing tailings slurry with a slurry volume greater than 600t / h enters the pump box, and then feeds it into a hydrocyclone Classification by the filter to obtain graded grit and graded overflow pulp; graded grit is fed into the high-frequency linear vibrating screen to obtain under-screen materials and over-screen coarse-grained materials; under-screen materials enter the pump box, and over-screen coarse-grained materials are stored in Coarse material cache stacking plant; ⑵Material holding: When the slurry volume of iron ore tailings is 500~600t / h, start the wet overflow ball mill, stop the high frequency linear vibrating screen, and feed the graded grit into the wet overflow type ball mill for grinding operation, and the ore slurry A after grinding enters the pump box; (3) loss of material: when the slurry amount of the iron ore tailings slurry is less than 500t / h, the coarse material on the grading sand settling and sieve is fed into the wet overflow at the same time The flow-type ball mill performs the grinding operation, and the ore slurry B enters the pump box after grinding. The invention has remarkable effect of reducing consumption and can ensure stable production process and indicators.

Description

technical field [0001] The invention relates to the technical field of grinding and classification technology, in particular to an intermittent grinding and consumption-reducing process for iron beneficiation tailings pulp. Background technique [0002] The common iron ore beneficiation process is as follows: the raw iron ore is discarded by wet coarse magnetic separation, the coarse magnetic tailings directly enter the iron beneficiation tailings slurry, and the coarse magnetic concentrate is obtained through two stages of grinding and magnetic separation. The iron ore concentrate sintered powder with a particle size of -0.043mm and a mass fraction of 80% is obtained by the reverse flotation desulfurization process for the ore and tailings, and the magnetic concentrate. The iron dressing process results in the following characteristics of the iron dressing tailings slurry: 1. The two-level differentiation of particle size composition is serious: +0.5mm size accounts for abo...

AI Technical Summary

Problems solved by technology

But this conventional grinding and classifying process has the following problems: 1. When the amount of slurry in the iron dressing tailings is lower than 400t / h, the grinding and classifying cycle load is relatively low, resulting in heavier grinding of steel balls, grinding, classifying and flotation process Waste of energy consumption, and lead to over-grinding and muddying of the pulp, worsening the mineralization environment of the subsequent flotation process, seriously affecting the improvement of production indicators and the density of tailings; When the amount of ore pulp is greater than 600t / h, the amount of ore pulp to be selected is relatively large, exceeding the load limit of the flotation single series, resulting in serious leakage in the flotation process, seriously affecting the flotation index and the stability of the production process

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