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Flotation-free dressing recovery process for mixed iron ore

An iron ore and flotation technology, which is applied in mechanical material recovery, recycling technology, solid separation, etc., can solve the problems of flotation agents such as environmental impact, high cost, and low recovery rate

Active Publication Date: 2021-09-03
ANHUI JINRISHENG MINING
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AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a kind of mixed type iron ore non-flotation beneficiation and recovery process, which is used to solve the problems in the prior art described in the background technology. The beneficiation method has problems such as high cost, low recovery rate and environmental impact caused by flotation reagents

Method used

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  • Flotation-free dressing recovery process for mixed iron ore
  • Flotation-free dressing recovery process for mixed iron ore

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specific Embodiment approach

[0032] Such as figure 2

[0033] The mixed iron ore is passed through the high-pressure roller mill-wet pre-selection and the magnetic separation concentrate is transported by the pump 1 to the first-stage cyclone 2 for classification, and the sand-set and overflow are obtained; the sand-set is sent to the first-stage ball mill 3 for grinding The mine obtains a section of ball mill discharge, and the first section of ball mill discharge flows to the first pump pool 4, and then is transported by the pump two 5 to the first section of the cyclone 2 for classification, forming a closed circuit;

[0034] The overflow is fed into the follow-up sorting system, the overflow is passed through a section of spiral chute 6 to obtain the concentrate and tailings, and the concentrate is iron concentrate; the tailings are sent to a section of weak magnetic separator 7 for weak magnetic Concentrate 2 and tailings 2 are selected, and tailings 2 is subjected to a section of strong magnetic s...

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Abstract

The invention discloses a flotation-free dressing recovery process for mixed iron ore, and relates to the technical field of ore dressing. Mixed iron ore high-pressure roller milling-wet pre-selected concentrate enters a follow-up grinding and selecting first-section hydrocyclone to be classified, sand settled by the hydrocyclone enters a first-section ball mill to be ground, and ball-milling discharged ore returns to the first-section hydrocyclone to be classified; overflow of the first-section hydrocyclone enters a spiral chute for grading to obtain iron ore concentrate; tailings in the spiral chute are subjected to weak magnetic separation and strong magnetic separation tailings discarding, strong magnetic concentrate passes through the spiral chute to obtain iron ore concentrate, the tailings in the spiral chute and the weak magnetic concentrate are combined and enter a second-stage hydrocyclone to be classified, classified settled sand enters a second-stage ball mill to be ground, second-stage ball mill discharged ore passes through the spiral chute to obtain an iron ore concentrate product III, and second-stage ground ore overflow is subjected to weak magnetic separation and strong magnetic separation tailings discarding; and the weak magnetic concentrate and the strong magnetic concentrate are combined and classified through screening, the undersize product is an iron ore concentrate product IV, and the screened product returns to the second-stage cyclone to be classified, so that a closed cycle is formed. The method has the advantages of low production cost, high recovery rate, high concentrate dewatering and filtering performance, economical, environmental protection and the like.

Description

technical field [0001] The invention relates to the technical field of ore beneficiation, in particular to a non-flotation beneficiation and recovery process of mixed iron ore. Background technique [0002] The beneficiation method for the recovery of mixed iron ore resources of magnetite and specularite generally adopts the stage grinding-weak magnetic field-strong magnetic field-reverse flotation process. However, the reverse flotation process needs to add chemicals, which increases the cost and brings environmental protection At the same time, the successful application of high-pressure roller mill-pre-selection and tailing technology has greatly improved the grade of ore fed into the grinding and separation system, and the subsequent separation and recovery process must be improved accordingly. Therefore, a green, environmentally friendly and efficient recovery of mixed iron ore beneficiation is sought Technology is of great significance and is the key to the establishme...

Claims

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Application Information

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IPC IPC(8): B03B9/06B03B7/00B03B1/00
CPCB03B9/06B03B7/00B03B1/00Y02W30/52
Inventor 吴江海王小良岳文龙赵睿谢广东唐言生肖金雄郭锐
Owner ANHUI JINRISHENG MINING
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