Method for recovering titanium concentrate by strong magnet roughing and multistage spiral chute reselection and concentration

Abstract

The invention discloses a method for recovering a titanium concentrate by strong magnet roughing and multistage spiral chute reselection and concentration. The method comprises the following steps that: 1) a high-efficiency concentrator is adopted to concentrate the tailings pulp of low intensity magnetic separation iron in iron tailings in advance to obtain underflow ore pulp; 2) fine silt in theunderflow ore pulp is removed through a sloping plate concentrator to obtain an underflow; 3) coarse slags in the underflow are separated and removed through a high-efficiency linear screen, and thetailings subjected to slag separation can be collected; 4) according to a difference of the specific susceptibilities of the titanium concentrate and a magnetite, a 3000Gs semi-counter-current magnetic separator is selected to carry out iron removal on the tailings subjected to the slag separation in advance, a ferrotitanium intercalated intergrowth body is removed through weak magnetic iron removal, and strong magnetic separation is carried out through a vertical ring pulsating high gradient magnetic separator; and 5) a product obtained in 4) is subjected to multi-time roughing, scavenging and concentration sorting, a material splitting way of spiral chute sorting adopts three-stage annular ore separation device for material splitting, and a final spiral titanium concentrate is obtained through multi-stage spiral chute sorting.

Description

technical field [0001] The invention relates to recovering ilmenite, in particular to a method for recovering ilmenite concentrate by using strong magnetic roughing and multi-stage spiral chute gravity separation. Background technique [0002] The methods for recovering the ilmenite in the iron dressing tailings of vanadium-titanium-magnetite mainly include: for the coarse-grained ilmenite whose 200 mesh content is less than 30% as the selected raw material, the recovery process is usually spiral chute re-election-dry strong Magnetic separation process and spiral chute gravity separation-dry electric separation process, the recovery process of fine-grained ilmenite with a -200 mesh content greater than 50% is often a strong magnetic-strong magnetic-flotation process. [0003] Defects and deficiencies of the prior art: (1) Spiral chute re-election-dry strong magnetic separation process: the coarse-grained ilmenite recovery process of selected raw materials-200 mesh content le...

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Problems solved by technology

[0003] Defects and deficiencies of the prior art: (1) Spiral chute re-election-dry strong magnetic separation process: the coarse-grained ilmenite recovery process of selected raw materials-200 mesh content less than 30% is often spiral chute re-election-dry Type strong magnetic separation process, this process is to enrich the ilmenite in the tailings of vanadium-titanium-magnetite iron dressing by adopting two-stage to three-stage spiral chute to enrich TiO-containing 2 Titanium medium ore with a grade of 38% to 40%, and then, dry the titanium medium ore, and then dry the dried titanium medium ore, and the dry strong magnetic separator is a drum strong magnetic separator , its surface magnetic field strength is 7000~12000Oe, dry strong magnetic separation will contain TiO 2 Grade 38% titanium medium ore is upgraded to contain TiO 2 Titanium concentrate with a grade above 46%

This process has the following main deficiencies: ① The particle size requirements for the selected raw materials are relatively strict. If there is more -200 mesh content in the selected raw materials, the titanium concentrate TiO 2 The recovery rate is low, and the recovery effect is poor; ②The titanium medium ore needs to be dried by heat before the dry strong magnetic separation, and the drying process and the dry strong magnetic separation process will produce a large amount of dust, and the working environment is poor , need to use more dry dust removal equipment for system process dust removal; ③ Dry strong magnetic separator has small processing capacity, more auxiliary equipment, and large equipment footprint; ④ Due to the need to dry titanium medium ore, its The amount of drying is large, and at the same time, there are many auxiliary equipment such as dry separation and dust removal, and the operating cost is relatively high

This process has the following main deficiencies: ① The particle size requirements for the selected raw materials are relatively strict. If there are more -200 mesh content in the selected raw materials, the titanium concentrate TiO 2 The recovery rate is low and the recovery effect is poor; ②The titanium medium ore needs to be dried by heat before the dry electric separation, and the drying process and the dry strong magnetic separation process will produce a large amount of dust, and the working environment is poor. More dry dust removal equipment is needed for system process dust removal; ③ The dry electric separator equipment has small processing capacity, more auxiliary equipment, and the equipment occupies a large area; ④ Due to the need to dry titanium middlings and its The temperature of the ore needs to be higher than 80°C, and the drying capacity is large. At the same time, there are many auxiliary equipment such as dry separation and dust removal, and the operating cost is relatively high.

This process has the following main deficiencies: ①The particle size of the selected raw materials requires that the content of +150 mesh should not be too much, otherwise, the titanium concentrate TiO 2 The recovery rate is low; ②Ilmenite flotation requires a variety of flotation reagents, and the cost of flotation reagents is high; ③The number of equipment sets required for flotation is large, and the power consumption is relatively high