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Method for efficiently recycling rare earth, fluorite and barite from rare earth tailings

A technology for rare earth tailings and barite, which is applied in the field of high-value mineral processing, energy saving and environmental protection, can solve the problems of low concentrate grade, high efficiency enrichment and recovery of rare earth, fluorite and barite, and high recovery costs, and achieves The effect of reducing processing scale and production cost, accurate and efficient selection, and strong suppression ability

Active Publication Date: 2020-09-29
四川省地质矿产勘查开发局成都综合岩矿测试中心
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  • Description
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AI Technical Summary

Problems solved by technology

The disadvantages of the above patents are: (1) The barite in the ore is not recovered; (2) The magnetic separation tailings are directly subjected to flotation operations. In this process, the ore pulp needs to be concentrated to increase the flotation concentration and increase the process. Complexity; (3) Magnetic separation concentrates still need multi-stage separation to obtain rare earth concentrates. There are many equipments and high beneficiation costs. In the end, it is difficult to balance the grade and recovery rate of rare earth concentrates at the same time.
Although this patented method can recover many useful elements from tailings, its process flow is complex, especially high-temperature fluidized roasting and pickling operations are required, and its roasting temperature is as high as 500-900 °C, which is extremely difficult to apply in actual production , the use cost is high, and the operation is difficult
Moreover, even if the beneficiation method adopts a high-temperature fluidized roasting operation that is extremely difficult to implement and has a huge process cost, the grade of the rare earth concentrate obtained by flotation can only reach more than 65%, and the recovery rate is only more than 75%. The ore grade and recovery rate are above 90% and 80% respectively, but they still need to be improved. On the other hand, this method still cannot recover barite from rare earth tailings
[0008] Although Chinese patent CN108176517A mentions a barite ore beneficiation process, this method cannot solve the problem of efficiently recovering barite from rare earth ores, and it is recorded that the selection of barite beneficiation method is affected by ore type, The nature of the original ore, the scale of the mine, and the use have a great influence, and it is difficult to select barite from different ores in a unified way.
[0012] To sum up, for the current mineral processing technology, it is difficult to efficiently enrich and recover rare earth, fluorite and barite from rare earth tailings at the same time. The problem that grade is not high becomes the technical problem to be solved urgently of the present invention

Method used

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  • Method for efficiently recycling rare earth, fluorite and barite from rare earth tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] With TREO (total rare earth oxide) content as 0.7%, CaF 2 Content 25%, BaSO 4 The rare earth tailings with a content of 20% are used as raw materials, and the rare earth, fluorite and barite in the rare earth tailings are recovered. The process flow chart of the beneficiation process is as follows figure 1 As shown, the specific steps are as follows:

[0068] (1) Screening: use screening equipment to screen the rare earth tailings to remove foreign objects such as branches;

[0069] (2) scrubbing: the rare earth tailings under the sieve are added in the scrubbing equipment, the scrubbing concentration is controlled to 70%, the scrubbing time is 10min, and the scrubbing speed is 1000r / min;

[0070] (3) Desliming: use desliming equipment for desliming, and remove -0.038mm slime;

[0071] (4) Grinding: For rare earth tailings, use rod mill or ball mill for closed-circuit grinding operation, and add rare earth and fluorite collector 600g / t into the mill at the same time,...

Embodiment 2

[0094] With TREO (total rare earth oxide) content as 1.0%, CaF 2 Content 30%, BaSO 4 The rare earth tailings with a content of 35% are used as raw materials, and the rare earth, fluorite and barite in the rare earth tailings are recovered. The process flow chart of the beneficiation process is as follows figure 1 As shown, the specific steps are as follows:

[0095] (1) Screening: use screening equipment to screen the rare earth tailings to remove foreign objects such as branches;

[0096] (2) scrubbing: the rare earth tailings under the sieve are added in the scrubbing equipment, the scrubbing concentration is controlled to 70%, the scrubbing time is 10min, and the scrubbing speed is 1000r / min;

[0097] (3) Desliming: use desliming equipment for desliming, and remove -0.038mm slime;

[0098] (4) Grinding: For rare earth tailings, use rod mill or ball mill for closed-circuit grinding operation, and add rare earth and fluorite collector 600g / t into the mill at the same time,...

Embodiment 3

[0121] With TREO (total rare earth oxide) content as 0.5%, CaF 2 Content 18%, BaSO 4 The rare earth tailings with a content of 40% are used as raw materials, and the rare earth, fluorite and barite in the rare earth tailings are recovered. The process flow chart of the beneficiation process is as follows figure 1 As shown, the specific steps are as follows:

[0122] (1) Screening: use screening equipment to screen the rare earth tailings to remove foreign objects such as branches;

[0123] (2) scrubbing: the rare earth tailings under the sieve are added in the scrubbing equipment, the scrubbing concentration is controlled to 70%, the scrubbing time is 10min, and the scrubbing speed is 1000r / min;

[0124] (3) Desliming: use desliming equipment for desliming, and remove -0.038mm slime;

[0125] (4) Grinding: For rare earth tailings, use rod mill or ball mill for closed-circuit grinding operation, and add rare earth and fluorite collector 600g / t into the mill at the same time,...

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Abstract

The invention belongs to the technical field of energy saving and environmental protection, and provides a method for efficiently recycling rare earth, fluorite and barite from rare earth tailings. The method specifically comprises the following steps of: step (1). adding 100-600g / t of water glass, 50-400g / t of barite inhibitor, and 100-400g / t of rare earth and fluorite collecting agent to tailings pulp, stirring and mixing the pulp; step (2). performing mixed flotation initial separation, scavenging and concentration operation to obtain flotation concentrates and flotation cleaner tailings; step (3). performing strong magnetic initial separation and scavenging operation on the flotation concentrates to obtain strong magnetic tailings which are the final fluorite concentrates; step (4). performing rare earth reselection rough concentration and scavenging operation on the strong magnetic concentrates to obtain rare earth reselection concentrates which are the final rare earth concentrates; and step (5). performing barite reselection roughing separation, scavenging, concentration and concentrate sweeping operation on the floatation cleaner tailings to obtain the barite gravity concentrates which are the final barite concentrates. The method solves the problem of difficult recovery of rare earth, fluorite and barite in the ore, and the obtained target mineral has high grade and high recovery rate.

Description

technical field [0001] The invention belongs to the technical field of energy conservation and environmental protection, relates to the field of clean development and utilization of metal / nonmetal resources and the technical field of tailings pollution control, and especially relates to the technical fields of reducing energy consumption of tailings pollutant treatment, protecting the environment, and high-value mineral processing. It relates to a method for efficiently recovering rare earth, fluorite and barite from rare earth tailings, so as to solve the problems in existing tailings. Background technique [0002] A large number of tailings are produced in the mineral processing industry, and the tailings contain some metals or non-metals that can be recycled. The existence of these substances in the tailings will not only cause ecological environmental pollution, but also cause a waste of resources. Rare earths are widely used in electronics, military, petrochemical, new ...

Claims

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Application Information

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IPC IPC(8): B03B9/00B03D1/00
CPCB03B9/00B03D1/00
Inventor 喻福涛余新文杨晓军马翔何婷
Owner 四川省地质矿产勘查开发局成都综合岩矿测试中心
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