Method for separating oolitic hematite

A technology of oolitic hematite and ore dressing method, which is applied in the direction of chemical instruments and methods, flotation, wet separation, etc., can solve the problems of high cost, unsatisfactory indicators, and environmental pollution, so as to reduce the loss of metal iron and economical Mineral processing cost, economically reasonable effect

Inactive Publication Date: 2010-04-14
GUIZHOU UNIV
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Problems solved by technology

Chen Wen et al. (Study on Direct Reduction Magnetic Separation Test of Hezhang Oolitic Hematite in Guizhou, "Metal Mine", 1997, No. 11) conducted a study on the direct reduction magnetic separation process of oolitic hematite in Hezhang, Guizhou , the results of the study show that: the use of fixed bed or external heating fluidized bed method can obtain better separation index, but the cost is too high, and it pollutes the environment; Wang Jing et al. Research "Mining and Metallurgy Engineering", 2004, Volume 24, Issue 3) conducted a preliminary study on the flotation test of Hezhang oolitic hematite in Guizhou, using flotation technology, focusing on the investigation of g...

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Embodiment 1

[0023] Embodiment 1 of the present invention: get part of Guizhou Hezhang oolitic hematite, its main chemical composition is: TFe is 45.56%, FeO is 1.52%, P is 0.63%, S is 0.26%, SiO 2 15.28%, Al 2 o 3 is 9.34%, CaO is 0.93%, and MgO is 1.24%. The mineral composition is as follows: the main iron-containing mineral is hematite, the gangue mineral is mainly quartz, followed by chlorite, kaolinite, dolomite, calcite and collophosite.

[0024] Weigh 300g of raw ore crushed to -2mm and pour it on a 0.038mm standard sieve for pre-screening, grind the +0.038mm ore sample to -0.075mm to account for 77.50%, and then mix the -0.038 mm ore sample with the The ore samples after grinding are mixed, and after mixing, a strong magnetic roughing is carried out under the condition that the magnetic field strength is 1671.98KA / m and the magnetic medium is a rod medium to obtain strong magnetic coarse concentrate and strong magnetic tailings; Grind the coarse concentrate until the particle si...

Embodiment 2

[0025] Embodiment 2 of the present invention: get part of Guizhou Hezhang oolitic hematite, its main chemical composition is: TFe is 45.79%, FeO is 1.47%, P is 0.65%, S is 0.25%, SiO 2 14.98%, Al 2 o 3 is 9.64%, CaO is 0.86%, and MgO is 1.35%. The mineral composition is as follows: the main iron-containing mineral is hematite, the gangue mineral is mainly quartz, followed by chlorite, kaolinite, dolomite, calcite and collophanite.

[0026]Weigh 300g of raw ore crushed to -2mm and pour it on a 0.038mm standard sieve for pre-screening, grind the +0.038mm ore sample to -0.075mm to account for 77.50%, and then mix the -0.038mm ore sample with the The ore samples after grinding are mixed, and after mixing, a strong magnetic roughing is carried out under the condition that the magnetic field strength is 1512.74KA / m and the magnetic medium is a rod medium to obtain strong magnetic coarse concentrate and strong magnetic tailings; Grind the coarse concentrate until the particle size...

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Abstract

The invention discloses a method for separating oolitic hematite, and the process of the method comprises discarding tailings of ores by intense magnetic separation through stage grinding and stage separation, and de-phosphorizing and increasing iron to the intense magnetic concentrated by reverse flotation. The intense magnetic separation is functioned of concentrating iron minerals and desliming, thereby preventing smile from influencing flotation. The highly-effective regulator is made from sodium carbonate, sodium silicate and sodium hydroxide, the collecting agent is a composite medicine made from hydroximic acid and alkyl sulfate, and the method for separating oolitic hematite is a key technology for the reverse flotation to further upgrade the concentrate of iron ore. The invention has the advantages of simple technological process, low energy consumption, low cost and good product index, and solves the defects in prior art.

Description

technical field [0001] The invention relates to a beneficiation method, in particular to a hematite ore beneficiation method. Background technique [0002] Iron ore is a non-renewable natural resource. After several years of continuous mining, rich iron ore and easy-to-select poor iron ore will be exhausted, replaced by a large number of "poor, fine, miscellaneous, difficult to grind and difficult to select" " of iron ore. Oolitic hematite is one of them. Oolitic hematite is an important sedimentary iron ore in my country. It has a large proven reserve and is mainly distributed in Hunan, Hubei, Guangxi, Guizhou and other places in China. Due to the fine particle size of the iron minerals, fine grinding is required to dissociate the oolitic nuclei. A large amount of clay minerals associated with the ore are likely to form fine particles and secondary slime during the crushing and grinding process, resulting in the iron Ore belongs to extremely difficult ore. [0003] With ...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03D1/00B03B1/00B03C1/025
Inventor 唐云刘安荣张覃杨强张群
Owner GUIZHOU UNIV
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