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Complex symbiotic refractory iron ore combined pre-selecting and waste discarding process

A technology for iron ore and refractory separation, which is applied in the field of complex symbiotic refractory iron ore combined pre-separation and waste disposal technology, which can solve the problem that the surrounding rock and weak magnetic ores cannot be effectively pre-separated and separated, the utilization rate of iron ore is low, and the waste of resources, etc. problems, to achieve the effect of reducing the amount of ore entering into grinding, improving resource utilization, and increasing production capacity

Inactive Publication Date: 2020-02-11
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the symbiotic refractory iron ore is processed by a single magnetic separation process, the metal recovery rate will only reach 50-60%, resulting in waste of resources, and the grade of iron concentrate obtained by strong magnetic separation is only about 50%, and the metal recovery rate About 70%, the tailings grade is as high as 18-20%, there is a problem that the utilization rate of iron ore is low or unusable
Moreover, it contains 15-20% of the surrounding rock, and there is a problem that the surrounding rock and the weak magnetic ore cannot be effectively pre-selected and separated.

Method used

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  • Complex symbiotic refractory iron ore combined pre-selecting and waste discarding process

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Embodiment 1

[0026] In this embodiment, the symbiotic refractory iron ore comes from Sidaogou Iron Mine in Gansu, with an iron grade of 32%, of which magnetite accounts for 15%, weakly magnetic iron ore accounts for 70%, and surrounding rocks are mixed in 15%. Follow the steps below To process:

[0027] A. The above-mentioned symbiotic refractory iron ore is crushed to 0-50mm, sieved into two particle sizes of 0-10mm and 10-50mm, and the 0-10mm particle size symbiotic refractory ore yield is 45%. , containing 6.75% magnetite, 31.5% weakly magnetic iron ore, and 6.75% surrounding rock; 10-50mm particle size symbiotic refractory ore yield 55%, containing 8.25% magnetite, 38.5% weakly magnetic iron ore, surrounding rock Rock 8.25%.

[0028] B. Using a magnetic pulley with a field strength of 1800 Oe to pre-select and separate symbiotic refractory iron ore with a particle size of 10-50mm, the magnetite operation yield is 15.78%, the raw ore yield is 8.68%, and the weak magnetic iron ore and s...

Embodiment 2

[0033] In this embodiment, the symbiotic refractory iron ore comes from Sidaogou Iron Mine in Gansu, with an iron grade of 30%, of which magnetite accounts for 15%, weakly magnetic iron ore accounts for 70%, and surrounding rocks are mixed in 15%. Follow the steps below To process:

[0034] A. The above-mentioned symbiotic refractory iron ore is crushed to 0-50mm, sieved into two particle sizes of 0-10mm and 10-50mm, and the 0-10mm particle size symbiotic refractory ore yield is 45%. , containing 6.75% magnetite, 31.5% weakly magnetic iron ore, and 6.75% surrounding rock; 10-50mm particle size symbiotic refractory ore yield 55%, containing 8.25% magnetite, 38.5% weakly magnetic iron ore, surrounding rock Rock 8.25%.

[0035] B. Using a magnetic pulley with a field strength of 2000 Oe to pre-select and separate symbiotic refractory iron ore with a particle size of 10-50mm, the magnetite operation yield is 15.3%, the raw ore yield is 8.41%, and the weak magnetic iron ore and su...

Embodiment 3

[0040] In this embodiment, the symbiotic refractory iron ore comes from Sidaogou Iron Mine in Gansu, with an iron grade of 31%, of which magnetite accounts for 15%, weakly magnetic iron ore accounts for 65%, and surrounding rocks are mixed in 20%. Follow the steps below To process:

[0041] A. The above symbiotic refractory iron ore is crushed to 0-50mm, sieved into two particle sizes of 0-10mm and 10-50mm, and the 0-10mm particle size symbiotic refractory ore yield is 40 %, containing 6% of magnetite, 26% of weakly magnetic iron ore, and 8% of surrounding rock; 60% of the symbiotic refractory ore yield of 10-50mm particle size, containing 9% of magnetite, 39% of weakly magnetic iron ore, Surrounding rock 12%.

[0042] B. Using a magnetic pulley with a field strength of 2200 Oe to pre-select and separate symbiotic refractory iron ore with a particle size of 10-50mm, the magnetite operation yield is 14.8%, the raw ore yield is 8.8%, and the weak magnetic iron ore and surroundi...

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Abstract

The invention belongs to the technical field of mineral processing, and discloses a complex symbiotic refractory iron ore combined pre-selecting and waste discarding process, which comprises the following steps: symbiotic refractory iron ore is firstly crushed to 0-50mm, and two size fractions of 0-10mm and 10-50mm are screened; a magnetic pulley is adopted for pre-selecting separation of the symbiotic refractory iron ore with the size fraction being 10-50 mm, wherein pre-selecting concentrate is magnetite, and pre-selecting tailings are weakly magnetic iron ore and surrounding rock; X rays are then adopted to transmit an intelligent pre-selector for separating the weakly magnetic iron ore with the size fraction of 10-50 mm from the surrounding rock, wherein the pre-selecting concentrate is weakly magnetic iron ore and the pre-selecting tailing is the surrounding rock; a spiral dry magnetic selector is adopted for separating and pre-selecting magnetite, weakly magnetic iron ore and surrounding rock for the symbiotic refractory iron ore with the size fraction of 0-10 mm, wherein the pre-selecting concentrate is magnetite, and pre-selecting tailings are mixed tailings of weakly magnetic iron ore and surrounding rock; and the spiral dry magnetic selector is adopted for separating and pre-selecting weakly magnetic iron ore and surrounding rock for the preselected tailings with thesize fraction being 0-10 mm, wherein the pre-selecting concentrate is weakly magnetic iron ore and the pre-selecting tailing is the surrounding rock.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a combined pre-selection and discarding process of complex symbiotic refractory iron ores. Background technique [0002] my country's iron ore resources are rich in lean ore and less in magnetic ore. Magnetite, hematite, siderite, and limonite coexist in refractory iron ore, which accounts for more than 50% of the total iron ore reserves. For example, Qinghai Small Shalong Iron Mine, Gansu Sidaogou Iron Mine, etc. If the symbiotic refractory iron ore is processed by a single magnetic separation process, the metal recovery rate will only reach 50-60%, resulting in waste of resources, and the grade of iron concentrate obtained by strong magnetic separation is only about 50%, and the metal recovery rate About 70%, the tailings grade is as high as 18-20%, and there is a problem that the utilization rate of iron ore is low or unusable. Moreover, containing 15-20% of the su...

Claims

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Application Information

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IPC IPC(8): B03C1/12B03C1/30
CPCB03C1/12B03C1/30B03C2201/20
Inventor 雷永顺展仁礼郭忆边立国王欣池永沁
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD