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Benefication method for sulphur-containing composite iron tailing

A beneficiation method and compound iron ore technology, which is applied in chemical instruments and methods, flotation, wet separation, etc., can solve the problems that sulfur-containing compound iron ore tailings beneficiation technology has not been reported, and achieve the reduction of tailings discharge , ease tailings treatment and stacking, and improve the effect of mineral utilization

Inactive Publication Date: 2012-12-12
宝钢集团上海梅山有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, there is no report on the beneficiation technology of sulfur-containing composite iron ore tailings that can fully select useful minerals

Method used

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  • Benefication method for sulphur-containing composite iron tailing

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Comparison scheme
Effect test

Embodiment 1

[0023] Please see figure 1 , figure 1 It is a process flow chart of the beneficiation method of sulfur-containing compound iron ore tailings. After the water-containing tailings are concentrated at the first stage, concentrated underflow and overflow are obtained. The concentration of the concentrated underflow is 25% to 35%, and the overflow suspended matter is lower than 200 mg / L, used as circulating water; the concentrated underflow passes through the slag separation of the cylindrical slag separation screen (the sieve diameter of the cylindrical slag separation sieve is 2×2mm), and the under-sieve product and slag of ≤2mm are obtained; the under-sieve product passes through a Graded spiral chute separation to obtain ore slime, middling ore, concentrate, middling ore and concentrate are combined for cyclone classification and concentration, and qualified particle size sand settling-200 mesh is separated, accounting for 70% to 80%, and the concentration is 15%. ~20%, the gr...

Embodiment 2

[0025] Embodiment 2: certain iron ore tailings iron grade 19% (wherein: hematite iron grade 7.8%, siderite iron grade 10%), sulfur grade 0.5%, Si0 2 Content 24%. In order to fully recover the useful components in the tailings, the present invention is achieved by designing a process flow of concentration-slag separation-gravity separation-classification-grinding-flotation-gravity separation to recover sulfur-containing iron tailings Iron concentrate, sulfur concentrate and other useful mineral components. First, the minerals are concentrated (concentrated underflow concentration 25% to 30%), slag separation treatment, and impurities in the sulfur-containing iron tailings are removed to create favorable conditions for sorting operations. Second, use spiral chute for desliming to obtain mixed concentrate and mud ore; use fine screen or hydrocyclone to classify (grading overflow-200 mesh accounts for 70% to 75%, concentration 18% to 20%), and obtain Coarse and fine grades of ma...

Embodiment 3

[0026] Embodiment 3: certain iron ore tailings iron grade 21% (wherein: hematite iron grade 9%, siderite iron grade 11%), sulfur grade 1%, SiO 2Content 20%. In order to fully recover the useful components in the tailings, the present invention is achieved by designing a process flow of concentration-slag separation-gravity separation-classification-grinding-flotation-gravity separation to recover sulfur-containing iron tailings Iron concentrate, sulfur concentrate and other useful mineral components. Firstly, the minerals are concentrated (concentrated underflow concentration 30% to 35%), slag separation treatment, and impurities in the sulfur-containing iron tailings are removed to create favorable conditions for the sorting operation. Second, use spiral chute for desliming to obtain mixed concentrate and mud ore; use fine screen or hydrocyclone to classify (grading overflow-200 mesh accounts for 75% to 80%, concentration 15% to 18%), and obtain Coarse and fine grades of ma...

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Abstract

The invention relates to a benefication method for sulphur-containing composite iron tailing, which comprises the following steps: (a) performing concentration and dreg separation treatment on a mineral, and removing impurities from the mineral; (b) desliming with a spiral shoot to obtain a bulk concentrate and a slimy mine, grading the bulk concentrate and the slimy mine with a swirler to obtaintwo granulometric classes of materials, namely a coarse granulometric class and a fine granulometric class, and performing floatation sulfur selection on the fine granulometric class of material to obtain a sulphur concentrate; (c) performing closed circuit grinding on the coarse granulometric class of material; and (d) sorting the tailing scavenged by floatation sulfur selection with the shoot to obtain an iron ore concentrate and a middling product. The method sufficiently selects out useful minerals from the tailing, increases the utilization rate of the minerals, reduces emission load of the tailing, achieves the effect of saving energy and reducing emission and solves the problems of treatment and stacking of the tailing.

Description

【Technical field】 [0001] The invention relates to the field of iron ore beneficiation, in particular to a beneficiation method for sulfur-containing composite iron ore tailings. 【Background technique】 [0002] my country is a big country in steel production and consumption. As the main raw material of the steel industry, iron ore has maintained a strong market demand for a long time in the past. However, judging from the proven reserves of iron ore resources, my country's iron ore resources are relatively scarce, and the per capita possession is far lower than the world average. Therefore, saving mineral resources and improving resource utilization efficiency are of great significance for maintaining the sustainable development of the national economy. Since my country's iron ore resources are generally poor, fine, and miscellaneous (ie: iron ore with low iron grade, fine embedded particle size, and complex occurrence state), the process of producing high-quality iron conce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03D1/008B03D1/004B03D101/02B03D101/04
Inventor 衣德强范庆霞
Owner 宝钢集团上海梅山有限公司
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