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Selective flocculation flotation method of micro-size fraction siderite

A technology of siderite and microfine particles, applied in the field of mineral processing, to achieve the effect of improving concentrate grade and recovery rate and reducing impact

Active Publication Date: 2018-04-24
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the problem that the existing "step-by-step flotation" process is difficult to deal with the adsorption of fine-grained siderite on the surface of hematite and quartz minerals, the present invention provides a selective flocculation method for fine-grained siderite, which aims to control Dispersion and selective flocculation, reduce the heterogeneous coagulation of siderite, hematite and quartz, thereby reducing the adverse effect of fine-grained siderite on hematite reverse flotation, and improving the grade of hematite reverse flotation concentrate and recovery

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Embodiment 1

[0024] In the embodiment of the present invention, the pure minerals are selected from carbonate-containing hematite ore in Anshan, Liaoning. After hand-selecting, the lump ore has a purity of 85% siderite, a purity of 98% hematite and a purity of 99% quartz. Crushing, grinding, hematite is sorted and sieved by shaking table to get -0.074mm particle size pure minerals, siderite is stirred and ground to -0.010mm, quartz is ground to -0.074mm by ceramics. The proportion of artificial mixed ore is 50% of quartz, 40% of hematite, and 10% of fine-grained siderite. The obtained raw ore has a TFe content of 30.05% and a FeO content of 5.15%. The siderite content is expressed relative to the FeO content.

[0025] The present embodiment carries out flotation to mixed ore, carries out according to the following steps:

[0026] Add mixed ore and water to the flotation tank to make a slurry with a concentration of 20%, stir for 2 minutes at a stirring speed of 1400 rpm, adjust the pH of t...

Embodiment 2

[0029] In the embodiment of the present invention, the pure minerals are selected from carbonate-containing hematite ore in Anshan, Liaoning. After hand-selecting, the lump ore has a purity of 85% siderite, a purity of 98% hematite and a purity of 99% quartz. Crushing, grinding, hematite is sorted and sieved by shaking table to get -0.074mm particle size pure minerals, siderite is stirred and ground to -0.010mm, quartz is ground to -0.074mm by ceramics. The proportion of artificial mixed ore is 50% of quartz, 40% of hematite, and 10% of fine-grained siderite. The obtained raw ore has a TFe content of 30.05% and a FeO content of 5.15%. The siderite content is expressed relative to the FeO content.

[0030] The present embodiment carries out flotation to mixed ore, carries out according to the following steps:

[0031] Add mixed ore and water to the flotation tank to make a slurry with a concentration of 20%, stir for 2 minutes at a stirring speed of 1400 rpm, adjust the pH of t...

Embodiment 3

[0034] In the embodiment of the present invention, the pure minerals are selected from carbonate-containing hematite ore in Anshan, Liaoning. After hand-selecting, the lump ore has a purity of 85% siderite, a purity of 98% hematite and a purity of 99% quartz. Crushing, grinding, hematite is sorted and sieved by shaking table to get -0.074mm particle size pure minerals, siderite is stirred and ground to -0.010mm, quartz is ground to -0.074mm by ceramics. The proportion of artificial mixed ore is 50% of quartz, 40% of hematite, and 10% of fine-grained siderite. The obtained raw ore has a TFe content of 30.05% and a FeO content of 5.15%. The siderite content is expressed relative to the FeO content.

[0035] The present embodiment carries out flotation to mixed ore, carries out according to the following steps:

[0036]Add mixed ore and water to the flotation tank to make a slurry with a concentration of 20%, stir for 2 minutes at a stirring speed of 1400 rpm, adjust the pH of th...

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Abstract

The invention relates to a selective flocculation flotation method of micro-size fraction siderite and belongs to the technical field of mineral processing. According to the method, the micro-size fraction siderite is subjected to selective flocculation, specifically, a dispersant, namely citric acid, is added firstly to reduce heterogeneous condensation between the siderite and hematite as well as between the siderite and quartz, then a selective flocculant, namely alpha-starch, is added, flocculation of the micro-size fraction siderite and inhibition of the hematite are achieved, and flotation is conducted through an anionic collector, namely sodium oleate. According to the selective flocculation flotation method of the micro-size fraction siderite, the influence of the micro-size fraction siderite on reverse flotation of the hematite can be significantly reduced, the recovery rate of iron in iron concentrates is increased, the grade of the iron in the iron concentrates is improved,and important significance is achieved on effective utilization of iron ores containing carbonate.

Description

technical field [0001] The invention relates to a selective flocculation and flotation method for fine-grained siderite, which belongs to the technical field of mineral processing. Background technique [0002] As the world economy enters a period of in-depth adjustment, the development of China's mining industry is facing new challenges and opportunities, and the iron ore industry is also facing challenges under the new economic normal. Restricted by the characteristics of "poor, thin, miscellaneous, and scattered" and the low utilization level, the supply of iron ore resources in my country is far from meeting the requirements of the development of the iron and steel industry and resource reserves. In order to ensure the survival and development of my country's iron and steel enterprises and reduce their dependence on imported iron ore, combined with the national policy of "efficient mining of mineral resources, green processing and efficient utilization", carry out resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D3/06B03D1/002B03D1/008B03B1/00B03D103/04B03D101/02B03D101/06
Inventor 李丽匣郝海青袁致涛卢冀伟
Owner NORTHEASTERN UNIV