Combined magnetic separation process for selecting weathering sand ilmenite

Abstract

The invention discloses a combined magnetic separation process for selecting weathering sand ilmenite. A titanium ore concentrate with the grade content of 46-52% and an iron ore concentrate with the grade content of 40-65% are obtained by the steps of pulping, screening and waste discarding, strong magnetic tailing discarding, screening, fine ore collecting, coarse grain regrinding, one-selection and two-scavenging and drying and selection. The process can realize relatively independent production of crude ores, middling and concentrates, can adjust the yields and the grades of a titanium middling and a titanium concentrate, and can separate out refined titanium and refined iron.

Description

technical field [0001] The invention relates to a beneficiation process, in particular to a beneficiation combined magnetic separation process of weathered type sandy ilmenite. The present invention is a professionally designed titanium ore beneficiation process for common soil, sand, and sandy soil weathering characteristics of titanium ore or ilmenite. Background technique [0002] The existing weathering-type placer-titanite beneficiation process is pulping, ball milling, pumping, and spiral chute multi-stage separation. The common problem of this method is that this method belongs to gravity separation, and the raw ore of weathering-type placer-titanite ore The ore sand particles are less than 0.5mm, and its specific gravity is only 4.51, which is about 1 / 4 of gold or 1 / 2 of iron. In addition, the traditional spiral chute cannot control the concentration and flow rate of the slurry, which leads to the heavy sand recovery rate of ilmenite Very low, only 35-55% heavy sand...

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Problems solved by technology

[0002] The existing weathering-type placer-titanite beneficiation process is pulping, ball milling, pumping, and spiral chute multi-stage separation. The common problem of this method is that this method belongs to gravity separation, and the raw ore of weathering-type placer-titanite ore The ore sand particles are less than 0.5mm, and its specific gravity is only 4.51, which is about 1 / 4 of gold or 1 / 2 of iron. In addition, the traditional spiral chute cannot control the concentration and flow rate of the slurry, which leads to the heavy sand recovery rate of ilmenite Very low, only 35-55% heavy sand recovery rate; moreover, the processing capacity of raw ore is small, the daily output is only 15-50 tons, poor adaptability, poor controllability of ore concentration, low concentrate grade; Running tail, the proportion of raw ore and ore sand particles is close, which leads to poor separation of the spiral chute. After ball milling, more fine ore will run to the tail with the water after the snail separation.

The content of heavy sand in weathered sand ilmenite is low, only 3-15%, the recovery rate of heavy sand in snail dressing is only about 35-55%, the grade of titanium concentrate is 38-44%, and the economic value of the product is low.

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