High-pressure roller milling-preselection processing method for vanadic titanomagnetite

A technology of vanadium-titanium magnetite and high-pressure roller milling, which is applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve the problems of low concentrate grade and recovery rate, and reduce grinding energy consumption and beneficiation efficiency Improve, improve the effect of a large range

Inactive Publication Date: 2013-02-13
NORTHEASTERN UNIV LIAONING +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the grade of the iron concentrate in the iron concentrator is 54%, and the recovery rate is 68%. The ore feeding particle size of the first stage of the process flow is 15mm; the grade of the titanium concentrate in the titanium concentrator is 47%, and the recovery rate is 24%. , the concentrate grade and recovery rate are not high

Method used

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  • High-pressure roller milling-preselection processing method for vanadic titanomagnetite
  • High-pressure roller milling-preselection processing method for vanadic titanomagnetite
  • High-pressure roller milling-preselection processing method for vanadic titanomagnetite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The original ore is vanadium-titanium magnetite in Panxi area, with a water content of 1% by mass, and an iron grade of 31.34% in the sample. TiO 2 The mass percentage is 12.46%, which is low-grade iron oxide ore, and its particle size composition is shown in Table 1.

[0020] The vanadium-titanium magnetite ore is superfinely crushed by a high-pressure roller mill and pre-selected and polished. The product after pre-selected and polished enters the ball mill classification closed circuit system. The process steps are as follows.

[0021] (1) After coarse crushing, medium crushing and fine crushing of raw ore, the particle size is below 12mm, and the high-pressure roller mill is used for ultra-fine crushing. The pressure between the rolls is 5MPa, the roll speed is 1.6m / min, and the roll gap is 5mm. The high-pressure roller mill ultra-fine crushing adopts an open-circuit crushing method: that is, the product after ultra-fine grinding of vanadium-titanium magnetite is directly...

Embodiment 2

[0033] The vanadium-titanium magnetite ore is superfinely crushed by a high-pressure roller mill and pre-selected and polished. The product after pre-selected and polished enters the ball mill classification closed circuit system. The process steps are as follows.

[0034] (1) After coarse crushing, medium crushing and fine crushing of raw ore, the particle size is below 12mm, and the high-pressure roller mill is used for ultra-fine crushing. The pressure between the rolls is 5MPa, the roll speed is 1.6m / min, and the roll gap is 5mm. The high-pressure roller mill ultra-fine crushing adopts the edge material circulation crushing method, and the proportion of the edge material circulation is 20%, 30% and 40% respectively according to the mass percentage; the particle size distribution of the high-pressure roller mill ultra-fine crushed product is shown in Table 4.

[0035] (2) Pre-selection

[0036] The ultra-fine crushed products of the high-pressure roller mill with a 30% side materi...

Embodiment 3

[0043] The vanadium-titanium magnetite ore is superfinely crushed by a high-pressure roller mill and pre-selected and polished. The product after pre-selected and polished enters the ball mill classification closed circuit system. The process steps are as follows.

[0044] (1) After coarse crushing, medium crushing and fine crushing of raw ore, the particle size is below 12mm, and the high-pressure roller mill is used for ultra-fine crushing. The pressure between the rolls is 5MPa, the roll speed is 1.6m / min, and the roll gap is 5mm. The ultra-fine crushing of the high-pressure roller mill adopts a fully closed-circuit crushing method: the product after the ultra-fine crushing of vanadium-titanium magnetite is sieved by a sieve with a mesh size of 3.5mm, and the product on the screen is returned to the high-pressure roller mill to be combined with the new feed ore and then crushed. The product under the sieve is fed into the next operation process.

[0045] (2) Pre-selection

[0046...

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Abstract

The invention discloses a high-pressure roller milling-preselection processing method for vanadic titanomagnetite. The raw ore is subjected to coarse crushing, secondary crushing, fine crushing and high-pressure roller milling superfine crushing, an open circuit crushing, scrap circulation crushing or fully-closed circuit crushing method is adopted, and low-intensity magnetism and high-intensity magnetism preselection is performed. The method disclosed by the invention reduces the energy consumption of crushing and ore milling and improves the ore selection efficiency in comparison with the conventional process; and the low-intensity magnetism and high-intensity magnetism preselection can separately select the main target ores-titanomagnetite and ilmenite in the vanadic titanomagnetite with higher pertinence, and the ore selection flow is simpler. By adopting a high-pressure roller mill as the superfine crushing apparatus after fine crushing, the particle size of the final crushed product can be reduced, and meanwhile, the preselection tailing discarding before milling is realized, the milling grade is improved and the energy consumption of ore milling is reduced. Compared with the traditional process, the particle size of the product is small, the equipment operation rate is high, and the unit crushing energy consumption is low. Meanwhile, the superfine crushed product can be subjected to preselection tailing discarding so as to improve the milling grade, reduce the energy consumption of ore milling, lighten the burden on subsequent selection process and improve the production efficiency.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and relates to a vanadium-titanium magnetite processing technology, in particular to a vanadium-titanium magnetite high-pressure roller mill-preselection processing method. Background technique [0002] Panxi area is extremely rich in iron ore resources and is one of the important iron ore bases in my country. Its ore reserves rank second in my country's iron ore reserves, accounting for about 15% of the country's total reserves. A large number of studies over the years have shown that it is mainly composed of iron and rich in various useful associated components such as vanadium, titanium, gallium, cobalt, nickel, scandium, and sulfur. It is a large-scale metal deposit dominated by iron. At present, the Panzhihua mining area has been mined and built an iron concentrator with an annual output of 4.8 million tons of vanadium-titanium iron concentrate and a titanium concentrator with an ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C23/12B03C1/02
Inventor 袁致涛魏勇韩跃新何亚民郭小飞徐智平严洋刘磊
Owner NORTHEASTERN UNIV LIAONING
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