Phosphosilicate type rare earth ore flotation collector and preparation method and application thereof

Abstract

The invention discloses a phosphosilicate type rare earth ore flotation collector and a preparation method and an application thereof. The phosphosilicate type rare earth ore flotation collector is prepared from the following materials according to the mass ratio: 5 to 15 parts of octyl ether propyl-a-amino-1,1-diphosphonic acid, 60 to 80 parts of dist coconut fatty acid, 5 to 10 parts of hexadecyl sulfonate and 1 to 3 parts of Tween-60. The phosphosilicate type rare earth ore flotation collector has the advantages of high collecting capability, high concentrate recovery rate, low production cost, less consumption and good separation effect when the phosphosilicate type rare earth ore flotation collector is applied to the floatation of phosphosilicate type rare earth ore or xenotime.

Description

technical field [0001] The invention belongs to the technical field of rare earths, in particular to a flotation collector of phospho-silicate type rare earth ores, a preparation method and application thereof. Background technique [0002] my country's proven industrial reserves of rare earth oxides are 18.59 million tons, accounting for about 23.6% of the world's proven rare earth reserves, and the light, medium and heavy rare earth elements are complete. There are many types of rare earth industrial minerals, mainly including oxides, fluorocarbonates, phosphates, silicates, and compound salts. At present, the three most important minerals for industrial extraction of rare earth metals are monazite[( RE,Th,Y)PO 4 ], bastnaesite [RECO 3 F] and xenotime [(Y,RE)PO 4 ]. Rare earth metals are widely used in clean energy, national defense technology, industrial technology, electronic products and other fields. [0003] At present, most rare earth mines with bastnaesite as t...

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Problems solved by technology

[0003] At present, most rare earth mines with bastnaesite as the main rare earth mineral use one or more of alkyl hydroxamic acid, hydroxamic acid with benzene ring, cycloalkyl hydroxamic acid, and naphthyl hydroxamic acid. Several kinds of collectors are mixed as collectors. Although this type of collectors has achieved good indicators in rare earth flotation, the price is high and the amount used is large, and the overall effect is not ideal when used alone; agents with benzene rings and naphthalene rings are difficult to degrade. Mineral dressing tailings wastewater is difficult to meet the requirements of environmental protection

[0004] At present, there is no report on the industrial utilization of phosphosilicate-type rare earth ores, and there are only laboratory separation indicators: for a very low-grade phosphosilicate-type rare earth ore with a REO content of 1.6%, the test uses A6494 hydroxamic acid The amount of collector is 1kg / ton raw ore, the inhibitor is water glass, and the foaming agent is terpineol. Under the condition of heating to 45°C, after grinding-high-concentration pulping-flotation process, it can Obtained rare earth concentrate with 14.5% REO grade and 75% recovery

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