Rare earth concentrate treatment method

Abstract

The invention belongs to the technical field of rare earth concentrates, and particularly relates to a rare earth concentrate treatment method. The method comprises the following steps: roasting: sodium carbonate and the rare earth concentrates are mixed, the mixture is put into a rotary kiln for roasting to form a roasted product, and the ratio of the rare earth concentrates to sodium carbonate is 1:(0.2-1):0.3. With adoption of a screening and grinding mode, materials with the particle size meeting the requirement are not ground any more, the grinding time is saved, meanwhile, the materialsare intermittently unloaded from the bottom of a material box, the materials which are unloaded once can be ground under swinging of grinding rollers once or multiple times, and blockage of the innerwall of a grinding groove body and the material leakage slits in a grinding plate is prevented; and besides, a small quantity of the materials are unloaded and slowly moved downwards through a distributing plate, a decelerating function for the materials can be achieved, compared with a traditional mode that the materials are added at a time to cause dust flying, the design enables the material flying amount to be smaller, dust pollution can be reduced, and material waste can be avoided.

Description

technical field [0001] The invention belongs to the technical field of rare earth concentrates, in particular to a processing method for rare earth concentrates. Background technique [0002] Rare earth minerals mainly exist in the form of minerals in the earth's crust, and there are three main types: as the basic constituent elements of minerals, rare earths exist in the mineral lattice in the form of ionic compounds, and constitute an essential component of minerals. Such minerals are usually called rare earth minerals, such as monazite, bastnaesite and so on. As mineral impurity elements, they are dispersed in rock-forming minerals and rare metal minerals in the form of isomorphic replacement. Such minerals can be called minerals containing rare earth elements, such as apatite, fluorite, etc., in an ion state Adsorbed on the surface or between particles of certain minerals. These minerals are mainly various clay minerals and mica minerals, and the rare earth elements in...

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Problems solved by technology

[0005] In order to make up for the deficiencies of the existing technology and solve the problem of simplifying the process in the prior art, the impurities in the rare earth concentrate cannot be effectively removed, and the unreasonable sintering temperature and sintering time will cause the loss of the rare earth concentrate and the use of a ball mill. Grinding roasted products will reduce the processing efficiency of rare earth concentrates, a processing method for rare earth concentrates proposed by the present invention

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