Method and device for purifying molybdenum concentrate

Abstract

The invention belongs to the technical field of purification and edulcoration of nonferrous metals, and particularly relates to a method and a device for purifying molybdenum concentrate. In the proposed method for purifying molybdenum concentrate, micro-wave heating, drying and deoiling, and micro-wave heating impurity denaturation are adopted to purify the molybdenum concentrate under a vacuum condition. The method comprises the steps of 1, heating at 200-400 DEG C by the microwave and carrying out drying and deoiling on the molybdenum concentrate material, feeding the removed oil to a heat exchange system to cool and liquefy, collecting the flowing oil from a liquid oil outlet; and 2, continuing to heat to 535-700 DEG C by the microwave after no oil flows out from the liquid oil outlet, and keeping warm for 1-6 hours, so that iron tramp in the molybdenum concentrate material is degenerated. The proposed molybdenum concentrate purification device comprises a heating furnace body, a loading system, a heat exchange system, a vacuum system and an electric system. The method is advanced in technology flow, and has flexibility; the manufacturing process is simplified; the production efficiency is improved; the device is reasonable in structure, and suitable for operation in large quantities; power consumption is reduced; recycling of flotation oil is achieved; vacuum sealed operation is carried out; and no material loss exists.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal purification and impurity removal, in particular to a method and device for purifying molybdenum concentrate. Background technique [0002] Molybdenum disulfide is a good solid lubricant with excellent vacuum resistance, high temperature resistance, pressure resistance and stable chemical properties. It is widely used in aerospace, aviation, chemical industry, metallurgy and other industries. [0003] At present, the natural method is often used to prepare molybdenum disulfide. First, the natural molybdenite is roughed to produce molybdenum rough concentrate, and the molybdenum rough concentrate is segmented and then multi-stage selected to obtain molybdenum concentrate, and then high-quality molybdenum concentrate As raw material, molybdenum disulfide with different purities can be obtained through deoiling, chemical leaching and other impurity removal and purification processes. [00...

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Problems solved by technology

The problems of this conventional treatment method are: 1. During the drying and deoiling process, material loss will inevitably occur due to non-airtight operation; 2. The molybdenum concentrate after drying and deoiling needs to be cooled to room temperature before being placed under vacuum conditions. Heating and denaturation, the process of discharging and loading materials in the middle is cumbersome, resulting in manpower and material resources consumption; 3. Due to the huge processing volume and huge equipment in practical operations, and the content of iron impurities is low (generally below 1%), the cost of impurity denaturation is relatively high High, sometimes enterprises simply do not carry out impurity denaturation and directly carry out chemical leaching, only to get doped with FeS 2 Molybdenum disulfide with slightly lower purity affects the sales price and market competitiveness

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