Method for preparing cement clinker from rare earth tailings

A technology for cement clinker and rare earth tailings, applied in cement production and other directions, can solve the problem of difficulty in resource utilization of rare earth tailings, and achieve the effect of improving the inability to use large quantities, good scale effect, and reducing consumption.

Active Publication Date: 2021-07-30
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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Problems solved by technology

[0005] To sum up, it is difficult to utilize rare earth tailings resources

Method used

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  • Method for preparing cement clinker from rare earth tailings

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Embodiment Construction

[0029] The technical solutions in the embodiments of the present invention will be fully described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative work belong to the protection scope of the present invention.

[0030] The present example is a method for preparing cement clinker from rare earth tailings, and the sample is the rare earth tailings from Dalugou in Dechang, Sichuan. Firstly, the rare earth minerals, fluorite, and strontium barium minerals are enriched and recovered through gravity separation-flotation-magnetic separation and other processes to obtain rare earth tailings re-election waste. Secondly, using the re-election waste to prepare cement raw meal includes: 70-85 parts...

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Abstract

The invention discloses a method for preparing cement clinker from rare earth tailings, and belongs to the technical field of preparation of cement clinker from rare earth tailings. The method comprises the following steps of: 1) separating and enriching rare earth minerals, fluorite and strontium-barium minerals in the rare earth tailings to obtain a re-separated waste material; 2) mixing and grinding the re-separated waste material prepared in the step 1) and a cement raw material raw material, and uniformly mixing the materials to obtain a cement raw material; and 3) calcining and cooling the cement raw material to obtain the cement clinker. According to the method disclosed by the invention, calcium, iron, silicon and aluminum components in the rare earth tailings can be used as cement raw materials, and a small amount of residual rare earth minerals, fluorite and strontium-barium minerals can be used as a composite mineralizer to reduce the firing temperature of the clinker; and therefore, when the cement clinker is prepared from the rare earth tailings, the exploitation of natural cement raw materials is reduced, the energy consumption for preparing the cement clinker can also be reduced, and a good comprehensive effect is achieved.

Description

technical field [0001] The invention relates to the technical field of preparing cement clinker from rare earth tailings, in particular to a method for preparing cement clinker from rare earth tailings. Background technique [0002] The reserves and output of rare earths in my country rank first in the world, but the grade of rare earth ores is generally relatively low, and a large amount of rare earth tailings are produced in the process of resource development and utilization. Due to the lack of mature and effective tailings resource utilization technology at this stage, the actual production The tailings produced in the mine can only be disposed of in stockpiles. This tailings disposal method is currently the most common and common way to deal with tailings, but now there are also many disadvantages. A large number of useful minerals in tailings have not been effectively recycled, causing a lot of waste of resources at the same time , The stockpiling of a large number of ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/14C04B7/36C04B7/38C04B7/42
CPCC04B7/14C04B7/38C04B7/36C04B7/421Y02P40/10
Inventor 熊文良张丽军黄阳陈达
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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