Large high-temperature-resistant double-ejection type ceramic airflow pulverizer

Abstract

The invention relates to a large high-temperature-resistant double-ejection type ceramic airflow pulverizer. The pulverizer comprises a primary ejector, a secondary ejector and a flat grinding body which are sequentially connected in series. The structural style of connecting the two ejectors with only two supersonic speed cavity nozzles and one wear-resistant impact plate with a certain inclination installing angle with the lining ceramic flat grinding body with only one feed port in series is adopted, erosive wear to the two nozzles of the two ejectors from material flow is small, and therefore the service life is five times that of pulverizing nozzles of a flat airflow pulverizer; as pulverizing is carried out two times at the same time, the yield is 1.5-2 times that of other airflow pulverizers of the similar specification, and the production requirements for the large size, automation, high temperature resistance, wear resistance, the high yield and high quality are met.

Description

Technical field [0001] The invention relates to the technical field of chemical material mechanical equipment, in particular to a large-scale high-temperature-resistant double-jet ceramic jet mill with reaction sintered silicon carbide lining. Background technique [0002] Jet mills are used more and more widely in industry due to their excellent crushing performance; with the development of science and technology, the demand for ultra-fine powders continues to increase, objectively requiring large-scale jet mills Thereby increasing the output per unit time. Using superheated steam as the pulverizing working medium, the pulverizing effect is excellent, and the energy consumption is only one-fourth of the cost of the compressed air working medium, so a high-temperature resistant jet mill is required. Moreover, the requirements for the grade of ultra-fine powder products are getting higher and higher, and the lining of the crusher is required to pollute the product as little as po...

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Problems solved by technology

[0003] The large-scale high-temperature-resistant flat ceramic jet mill used in the prior art adopts a large-scale reaction sintered silicon carbide ceramic lining, and the effect is very good. However, there are also some shortcomings in the use process, for example, in Dozens of alloy crushing nozzles distributed around the grinding body have a service life of only 3 to 4 months due to the erosion of the high-speed mixture flow in the grinding chamber. This is a defect in all multi-nozzle flat jet mills; in addition, although the flat The crushing and self-grading effects of the type air jet mill are very good, but the production capacity of the existing flat ceramic jet mill cannot meet the needs of the growing industrial production. If the large-scale flat ceramic jet mill is manufactured machine, its large reaction sintered silicon carbide ceramic lining is more difficult to manufacture; therefore, what type of large ceramic jet mill to design and manufacture to meet the needs of growing industrial production has become an important issue

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