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Method for selecting iron ore from red mud

A technology for iron ore and red mud, applied in the field of silicate, can solve the problems of poor industrial application feasibility, and achieve the effects of improving market competitiveness, high yield, good economic and social benefits

Active Publication Date: 2005-01-26
SHANDONG QIANSHUN MINING & METALLURGY SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The article "Using Pulsating High Gradient Magnetic Separator to Recover Iron from Red Mud" published in the 4th issue of "Jiangxi Nonferrous Metals" in 2000 introduced the use of pulsating high gradient magnetic separator to recycle Guangxi Pingguo Aluminum Co. Raw material, iron in the red mud produced by the production of alumina, the result is that when the TFe in the raw material is 19%, the concentrate grade is 54.7%, the recovery rate is 35.36%, and the feasibility of industrial application is not strong

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  • Method for selecting iron ore from red mud

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Effect test

Embodiment 1

[0015] The weight percent of red mud composition used in the present invention is composed of:

[0016] SiO 2 20.55, Fe 2 o 3 36.97, Al 2 o 3 20.46, Na 2 O 11.36. The balance is other. Among them, A / S (Al / Si ratio) was 1.00, and N / S (Na / Si ratio) was 0.55.

[0017] After primary selection, the weight percent of the selected red mud sand is composed of:

[0018] SiO 2 14.83, T Fe (total amount of Fe) 46.87, Al 2 o 3 6.54, CaO 0.43, MgO 0.16, and the balance is other. Among them, the S element is 0.028, and the P element is 0.255.

[0019] The weight percentage of ore sand phase is composed of: N 2 O·Al 2 o 3 1.68 SiO2 2 1.73H 2 O (hydrous sodium aluminosilicate) accounted for 22.4%; 3NaAlSiO 4 NaOH accounted for 3.4%; Fe 2 o 3 Accounted for 68.6%; AlO (OH) (a diaspore) accounted for 2.5%; CaCO 3 Accounting for 1.42%.

[0020] The main minerals in ore are hematite, goethite, siderite, hydrous sodium aluminosilicate, diaspore, followed by aragonite and c...

Embodiment 2

[0028] The method for selecting iron ore from red mud according to the present invention is as follows:

[0029] The fine red mud is removed from the red mud to obtain red mud sand, and the red mud sand is separated and washed twice to obtain red mud sand; the red mud sand is ground and graded, and the fineness is controlled to pass through a 200 mesh sieve to account for 60%. Separation, the operating pressure is controlled at 0.20Mpa, roughing and beneficiation are carried out, the tailings are removed by roughing to obtain middle ore, and the concentrate is obtained by beneficiation. The process conditions of pulsating high-gradient magnetic separation control are as follows:

[0030] Rough selection part: background field strength and magnetic flux density 0.92T, pulse frequency 140 times / min, flow rate 100L / H, feeding time 3 minutes;

[0031] Selected part: background field strength and magnetic flux density 0.75T, pulse frequency 220 times / min, flow rate 100L / H, mine fee...

Embodiment 3

[0035] The method for selecting iron ore from red mud according to the present invention is as follows:

[0036] The fine red mud is removed from the red mud to obtain red mud sand, and the red mud sand is separated and washed twice to obtain red mud sand; the red mud sand is ground and graded, and the fineness is controlled to pass through a 200 mesh sieve to account for 65%, and the graded cyclone is used to obtain the red mud sand. Separation, the operating pressure is controlled at 0.24Mpa, roughing and beneficiation are carried out, the tailings are removed by roughing to obtain middle ore, and the concentrate is obtained by beneficiation. The process conditions of pulsating high-gradient magnetic separation control are as follows:

[0037] Rough selection part: background field strength and magnetic flux density 0.90T, pulse frequency 120 times / min, flow rate 110L / H, feeding time 3 minutes;

[0038] Selected part: background field strength and magnetic flux density 0.80T...

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Abstract

The invention is a method for selecting iron ore from red mud. It preprocesses the red mud to eliminate the tiny red mud and acquires the red mud sand, carries on grinding and classification to the red mud sand then eliminates the tail ore through raw selection and acquires the concentrate after choiceness. The picking process uses high background field density and small pulse frequency, the choiceness uses lower background field density and larger pulse frequency. The flow is simple, and the reclaim rate of iron is high, the reclaim rate of iron can reach to 90%. The invention has excellent economical efficiency and social efficiency.

Description

technical field [0001] The invention relates to a method for selecting iron ore from red mud, which belongs to the technical field of silicate and is used for the treatment of red mud waste residue in alumina production. Background technique [0002] At present, the production methods of alumina in the world include sintering method, Bayer method and Bayer sintering combined method. No matter which method of alumina production is used, a by-product-red mud will be produced. Red mud is a by-product of alumina production. , For every ton of alumina produced, 1-1.5 tons of red mud will be produced as a by-product. The common practice in the world is to pile it up into red mud piles. Only a small amount of red mud is used in the production of cement and red mud plastic products in China. Red mud is an alkaline substance, and the sewage generated by rainwater washing red mud will pollute both water quality and soil. Red mud contains a variety of valuable components, which are p...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03C1/00
Inventor 温金德冯婕张玉明李卫东张坤聂雨滨王利娟姜波李福强刘志云蒋涛孟旭潘明友王明银田朝波徐春华
Owner SHANDONG QIANSHUN MINING & METALLURGY SCI
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