Desulfurizing method for high-sulfur rhodochrosite

Abstract

The invention relates to a desulfurizing method for high-sulfur rhodochrosite, which comprises the following steps: (1) pulverizing and screening high-sulfur rhodochrosite, (2) feeding water to make a mixed sizing agent under a condition of room temperature, (3) adding vanadic oxide and 2.6-anthraquinone double ammonium sulphonate or adding vanadic oxide and tannin extract into the mixed sizing agent, (4) adjusting the pH value of the mixed sizing agent to be 8 to 10 by dilute aqua ammonia, and then stirring under the condition of keeping the temperature of 55 to 65 DEG C, (5) filtering and separating the mixed sizing agent gained after the step (4), and gaining a precipitate and a filter liquor, and (6) washing the precipitate and then drying to gain manganese mineral powder with low sulphur content. The method has the advantages of low energy consumption, simple technology, easiness in operation, low environmental pollution and high desulfurizing efficiency, and can improve the manganese content of the pre-processed alabandite.

Description

technical field [0001] The invention relates to a method for desulfurizing high-sulfur rhodochrosite. Background technique [0002] Some manganese-containing ores, including rhodochrosite, are important raw materials for smelting manganese metal. In order to avoid the adverse effects of impurities (also known as harmful elements) in manganese ore on smelting, people often need to perform pre-treatment on manganese ore to remove impurities. For example, for the manganese ore whose mass percentage of sulfur exceeds 1.5%, it must be desulfurized first. For low-grade manganese ores, sulfur is usually removed when manganese is leached under acidic conditions (to increase manganese content); for high-grade manganese ores, in order to avoid excessive hydrogen sulfide, it is often used A method of roasting in the presence of a desulfurizer. For example, in the document "Semi-industrial desulfurization test of Manaoshan primary manganese ore", it is recorded that the roasting meth...

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Problems solved by technology

However, the document also emphasizes that the roasting temperature should not exceed 1050°C, "exceeding this temperature will lead to difficulty in furnace formation and ore discharge"

That is to say, even if the desulfurizer is improved, desulfurization by roasting not only consumes too much energy, but also must strictly control the related processes, otherwise it is difficult to reduce the mass percentage of sulfur to less than 1.5%

In addition, for high-sulfur rhodochrosite with a mass percentage of sulfur exceeding 1.5%, the roasting method for desulfurization not only has the same problem, but is completely unnecessary—because the sulfur contained in high-sulfur rhodochrosite is mainly based on Existing in low-valent sulfur form

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