Method for pollution-free production of molybdenum oxide

Abstract

The invention provides a method for pollution-free production of molybdenum oxide, which comprises the following steps of: adding molybdenum sulfide into a sealing reactor and introducing oxygen into the reactor, and heating, so that the molybdenum sulfide reacts with the oxygen to generate molybdenum oxide and sulfur dioxide; and filtering generated high-temperature gas by a dust collector, and cooling, compressing and separating to obtain high-concentration liquid sulfur dioxide. In the method, the molybdenum oxide is produced by adopting the closed oxygen-enriched combustion technology, so the production efficiency of the product is improved, and mineral resources are saved; energy consumption is saved by utilizing heat in a chemical reaction; and the SO2 generated in the production process can be recycled to realize the resource utilization of exhaust gas and reduce atmosphere pollution, so the method has a bright application prospect.

Description

technical field [0001] The invention relates to a clean production method of molybdenum oxide, which belongs to the technical field of environmental pollution control. Background technique [0002] my country is the largest producer of molybdenum oxide in the world, and its output accounts for more than 40% of the world's total output. At present, more than 90% of molybdenum concentrates at home and abroad are smelted by roasting-ammonia leaching process. According to the different roasting equipment or added components, the roasting process of molybdenite can be divided into rotary kiln roasting process, reverberatory furnace roasting process, multi-hearth furnace roasting process, fluidized bed roasting process, flash furnace roasting process, adding auxiliary Agent roasting process, direct pyrolysis process, etc. [0003] (1) Reverberatory furnace roasting process [0004] The reverberatory furnace roasting process is used to produce molybdenum calcine. When roasting m...

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Problems solved by technology

[0020] The process produces an intermediate product, MoO 3 The output rate is not high, resulting in a waste of resources; calcination water immersion consumes water resources, and is easy to cause water pollution; adding lime or Na 2 CO 3 , low desulfurization efficiency, large environmental pollution

[0021] SO in the tail gas emitted by the above process 2 The concentration is too high compared to the conventional flue gas desulfurization method, but too low compared to the recycling acid production process, which is difficult to handle, resulting in waste of sulfur resources and serious pollution to the environment; low energy consumption, poor production conditions, high labor intensity, etc.

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