Method for leaching rubidium potassium aluminum from rubidium-containing mica ore

Abstract

The invention relates to a method for leaching rubidium, potassium and aluminum from a rubidium-containing mica ore. The method comprises the following steps that the rubidium-containing mica ore is mixed with concentrated sulfuric acid and subjected to a curing reaction, and thus a cured material is obtained; the cured material is reduced and roasted, and thus roasted sand and flue gas are obtained; the roasted sand is leached through water, and thus a leaching solution and leaching slag which contain rubidium and potassium are obtained; and the leaching slag is leached through an alkaline aqueous solution, and thus a leaching solution containing rubidium, potassium and aluminum is obtained. Synergistic extraction of potassium, aluminum and rubidium can be achieved, and the method has the beneficial effects that consumption of an acid / alkali reagent is less, energy consumption is low, the output quantity of waste slag is small, and the impact on the environment is small.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for leaching rubidium potassium aluminum from rubidium-containing mica ore. Background technique [0002] Rubidium is an extremely important rare metal resource. It not only has important uses in the fields of electronic devices, photovoltaic cells, catalysts, special glass, biochemistry, and medical treatment, but also shows great promise in magnetic fluid power generation, laser conversion electrical energy devices, etc. very important role. However, since rubidium is a typical dispersed element, independent minerals of rubidium have not been found in the earth's crust, so it is very difficult to extract rubidium. Extracting rubidium from the by-products of extracting cesium, lithium and other metals and salt lake brine is the best way to extract rubidium main source of . More than 90% of the world's total reserves of rubidium are stored in salt lakes. However, du...

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Problems solved by technology

[0004] But there are many problems in adopting the above-mentioned chlorination roasting method: (1) because the potassium in the mica ore, aluminum can not be reclaimed, thus cause waste of resources, resource utilization rate is low; Reagents such as calcium, sulfuric acid, sodium carbonate and sodium hydroxide, therefore consume a lot of reagents, resulting in higher costs; (3) a large amount of three wastes will be produced in the chlorination roasting method, which seriously pollutes the environment, as the total slag amount is about 3 to 5 times the amount of rubidium concentrate, the roasting and acid leaching process will produce high-salt wastewater and hydrogen chloride waste gas

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