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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 Improvement, crushing and grinding energy consumption reduction effect

Inactive Publication Date: 2011-09-07
NORTHEASTERN UNIV +1
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  • Summary
  • 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
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  • High-pressure roller milling-preselection processing method for vanadic titanomagnetite

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Effect test

Embodiment 1

[0019] The raw ore is vanadium-titanium magnetite in Panxi area, with a water content of 1% by mass, and the iron grade in the sample is 31.34%, 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 then pre-selected and polished. The pre-selected and polished product enters the ball mill classification closed circuit system. The process steps are as follows.

[0021] (1) After coarse crushing, medium crushing and fine crushing, the size of the raw ore is below 12mm, and then 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: the product after ultra-fine pulverization of vanadium-titanium magnetite is directly fed into...

Embodiment 2

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

[0034] (1) After coarse crushing, medium crushing and fine crushing, the size of the raw ore is below 12mm, and then 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 superfine 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 ultrafine 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 material ...

Embodiment 3

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

[0044] (1) After coarse crushing, medium crushing and fine crushing, the size of the raw ore is below 12mm, and then 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 the fully closed-circuit crushing method: the product after the ultra-fine crushing of the 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

...

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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 besubjected 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, relates to vanadium-titanium magnetite processing technology, and particularly relates to a vanadium-titanium magnetite high-pressure roller mill-preselection processing method. Background technique [0002] Panxi Region is extremely rich in iron ore resources and is one of my country’s important iron ore bases. 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 iron-based, and it is rich in vanadium, titanium, gallium, cobalt, nickel, scandium, sulfur and other useful accompanying components. It is a large-scale metal deposit dominated by iron. At present, Panzhihua mining area has built an iron ore dressing plant with an annual output of 4.8 million tons of vanadium ilmenite concentrate and a titanium dressing plant with an annual output of 250,000 t...

Claims

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Application Information

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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
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