Flotation method for improving grade of flocculent iron ore concentrate

A flocculent iron and concentrate technology, applied in flotation, solid separation, etc., to achieve the effects of low production cost, wide applicability and high recovery rate

Active Publication Date: 2016-03-23
陈均宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How to float the iron concentrate after strong magnetic separation from 42% to 54% grade to 55% to 64% grade, so that it can meet the quality requirements of blast furnace ironmaking products and reduce the production cost of ironmaking has always been a difficult problem. reports of such technologies

Method used

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  • Flotation method for improving grade of flocculent iron ore concentrate

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Effect test

Embodiment 2

[0026] Another application example of the flotation method for improving the flocculent iron concentrate grade of the present invention comprises the following steps:

[0027] The red mud is separated by high-gradient magnetic separator to obtain 48-54% iron concentrate with a pH of 8-13. Slurry tank, the slurry is adjusted to a concentration of 30% to 45%, pumped into The vertical stirring mill grinds the ore until the particle size is 44-57μm, and then flows to the The flotation column reverse flotation roughing system, add MH-80 flotation agent at 5~10kg / t dry ore, and the roughing concentrate flows into the Thickener, the underflow is sold after being filtered by a filter press to 15% moisture. Tailings flow into Slurry tank with thick tails, adjust the slurry to 30%~45% concentration, add GH-HL flotation agent at 5~10kg / t dry ore, and after The flotation column selects and sweeps the concentrate to return to the roughing system. After natural dehydration, the t...

Embodiment 3

[0029] Another application example of the flotation method for improving the flocculent iron concentrate grade of the present invention comprises the following steps:

[0030] The red mud is separated by high-gradient magnetic separator to obtain 48-54% iron concentrate with a pH of 8-13. Slurry tank, the slurry is adjusted to a concentration of 30% to 45%, pumped into The vertical stirring mill grinds the ore until the particle size is 57-74μm, and then flows to the The flotation column reverse flotation roughing system, add MH-80 flotation agent at 5~10kg / t dry ore, and the roughing concentrate flows into the Thickener, the underflow is sold after being filtered by a filter press to 15% moisture. Tailings flow into Slurry tank with thick tails, adjust the slurry to 30%~45% concentration, add GH-HL flotation agent at 5~10kg / t dry ore, and after The flotation column selects and sweeps the concentrate to return to the roughing system. After natural dehydration, the t...

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Abstract

The invention discloses a flotation method for improving the grade of a flocculent iron ore concentrate. The flotation method comprises the following steps of carrying out magnetic separation to obtain 42-54% of flocculent iron ore concentrate powder; then, carrying out slurry mixing and wet grinding, and then, carrying out roughing-refining-sweeping reverse flotation process flow under an alkaline system to obtain 55-64% of high-grade iron ore concentrate; and concentrating the iron ore concentrate by using a thickener, carrying out filter pressing, then, selling, carrying out internal recycling and slurry mixing on filter pressing water and a supernatant, and delivering tailings to a cement plant. The flotation method is suitable for 42-54% of flocculent iron ore concentrate powder with the ore slurry concentration of 30-50% and has the characteristics of simple process, environment friendliness in operation, water recycle and no wastewater and waste gas discharge; and the tailings are suitable for being used as ingredients in the cement plant.

Description

technical field [0001] The invention relates to the field of ore dressing, in particular to a flotation method for improving the grade of flocculent iron concentrate. technical background [0002] With the limitation of the production capacity of my country's iron industry and the sluggish development of the iron and steel industry as a whole, the demand for ore has declined, and the international ore price has also dropped rapidly. There is basically no market demand for 48-54% of iron ore. For blast furnace ironmaking, the general iron and steel industry requires the cut-off grade of iron ore to be 56%, and the iron content of the ore decreases. Correspondingly, the fuel ratio of ironmaking needs to be increased, the fuel cost will increase, and the ironmaking cost will increase. Decreasing the iron content of iron ore from 58% to 50% will increase pollutant emissions by 10% and reduce molten iron production by 20%. Therefore, iron ore grade has a great influence on blast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03D103/04
CPCB03D1/00B03D2203/04
Inventor 陈均宁黎方正黄荣满周干联钟文潘建军付力豪张美义蒋鲲鹏刘泽梁媛黄柳萍
Owner 陈均宁
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