Method for preparing high-purity sulfur-containing products in a short process of molybdenum concentrate

Abstract

The method for preparing high-purity sulfur-containing products in a short process of molybdenum concentrate specifically includes: mixing molybdenum concentrate raw materials and molybdenum trioxide raw materials in proportion, and reacting at a first temperature to generate high-concentration sulfur dioxide and molybdenum dioxide; The sulfur dioxide is further produced into a sulfur-containing product; wherein, the first temperature is set at 550-850°C. The method of preparing high-purity sulfur-containing products from molybdenum concentrate in a short process can directly generate high-concentration sulfur dioxide, and the theoretical concentration value can reach 100%. Further, the high-concentration sulfur dioxide is reduced to sulfur by a carbonaceous reducing agent, which is convenient to use and improves the sulfur dioxide. Application value, high-concentration sulfur dioxide can be further prepared into sulfuric acid, which effectively reduces the production cost of sulfuric acid; high-concentration sulfur dioxide can also be further prepared into liquid sulfur dioxide; molybdenum dioxide can also be further oxidized into molybdenum trioxide, and the generated molybdenum trioxide can be used as The short process of molybdenum concentrate prepares the raw material of high-purity sulfur-containing products and realizes its recycling.

Description

technical field [0001] The application belongs to the technical field of sulfide treatment, and in particular relates to a method for preparing high-purity sulfur-containing products in a short process of molybdenum concentrate. Background technique [0002] Conventional molybdenum concentrate processing requires roasting to produce commercial molybdenum oxide and low concentrations of sulfur dioxide. The low-concentration sulfur dioxide flue gas is prepared into sulfuric acid through an acid-making process, and industrial MoO 3 It can be directly produced into ferromolybdenum by aluminothermic reaction, or it can be further processed by hydrometallurgy to generate ammonium molybdate solution in the process of pickling and ammonia leaching. The process produces ammonium molybdate, after which high-purity MoO is collected after roasting and decomposing 3 , and finally obtain the final product molybdenum powder through two-stage reduction. There are also manufacturers who a...

AI Technical Summary

Problems solved by technology

Some manufacturers also add lime to absorb SO in the roasting process. 2 , forming CaMoO in the presence of slaked lime 4 , CaSO 4 and H 2 O, this process can avoid the formation of SO 2 pollutes the environment, but also generates CaSO 4 waste, waste of resources

[0003] Although the technology of preparing sulfuric acid from sulfur dioxide produced by roasting is mature in the traditional process, the equipment investment is large, and the storage and transportation costs of sulfuric acid are also high.

In particular, the contradiction between the seasonal consumption of sulfuric acid and the stable and balanced production is prominent, and the production stability is often affected by poor sales, resulting in a heavy environmental protection burden for molybdenum metallurgical enterprises

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