Special rotary high-temperature vulcanizing device for synthesizing rare earth sulfide

Abstract

The invention belongs to the technical field of rare earth sulfide functional material synthesis equipment, and particularly relates to a special rotary high-temperature vulcanizing device for rare earth sulfide synthesis. The device comprises a multi-station rotary table, wherein different stations of the rotary table are sequentially provided with a high-temperature vulcanization furnace body, a medium-temperature desulfurization furnace body and a low-temperature rapid cooling area, a vertical lifting slide way driven by a stepping motor is arranged in the center of the rotary table, a quartz tube fixing seat is connected to the lifting slide way and can fix a quartz tube containing an inlet pipeline and an outlet pipeline, a cylindrical charging container is arranged in the quartz tube, a quartz tube air inlet pipe is connected with a pressure display meter and a protective atmosphere, a quartz tube air outlet pipe is connected with a three-way valve, and the three-way valve is connected with a tail gas treatment device and a vacuum pump. When the vulcanizing device works, the vulcanizing efficiency can be improved to the maximum extent through the vertical lifting slide way and the horizontal rotary table, and the content of residual sulfur is reduced.

Description

technical field [0001] The invention belongs to the technical field of rare earth sulfide functional material manufacturing equipment, and in particular relates to a special rotary high-temperature vulcanization device for rare earth sulfide synthesis. Background technique [0002] Rare earth sulfides have rich and bright colors and good coloring properties, good semiconductor properties, excellent optical and magnetic properties, and good heat resistance. These characteristics make rare earth sulfides have good application prospects in many fields. [0003] At present, there is little information about the preparation equipment of rare earth sulfides. In order to realize the application of cerium sulfide in the field of red paint, tunnel kiln type preparation equipment is adopted for mass industrialized continuous production. But there is following deficiency in the powder that this method makes: [0004] 1) Insufficient purity of the powder: In the preparation process, a...

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Problems solved by technology

[0004] 1) Insufficient purity of the powder: In the preparation process, active metal elements are doped to reduce the carbonization temperature of oxides and the vulcanization temperature of rare earth elements

[0005] 2) The shape of the powder cannot be controlled. After the kiln is sintered, the powder is lightly ball milled (excessive ball milling can easily lead to sulfide oxidation and spontaneous combustion). The particle size is large and the shape is irregular, which affects the sintering performance of the powder. Pores are prone to occur during the sintering process ;

[0006] 3) The residual sulfur in the powder affects the calculation of the stoichiometric ratio during the use of rare earth sulfides

[0007] Based on the above powder defects, rare earth compounds obtained by kiln sintering are difficult to apply in high-tech fields. Currently, horizontal tube furnaces are commonly used to synthesize rare earth compounds. Quartz tubes with an inner diameter of 50mm are commonly used to prepare 1-10g of high-purity rare earth compounds each time. Tube furnace has long cooling time and low efficiency

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