适用于矿山、冶金、地质、建材、科研单位实验室粉碎矿物化验使用。本产品由原地矿部唯一指定企业生产，执行行业标准。

Laboratory sealed double-roll crusher is applicable to assay of comminuted minerals in labs. Of research institutes for mine, metallurgy ,geology and building material industries. The product is produced by the only enterprise designated by the former Ministry of Geology and Mineral Resources, in compliance with the Industrial standards.

密封式对辊机是针对稀土材料、金属氧化物、炉料合金和金属硅等特殊行业，根据“层压粉碎”理论而专门设计的一种密封高压辊式粉碎设备。该机与普通对辊机的区别在于两相向旋转的轧辊间压力可以达到较大值，物料在啮合区处于“层压粉碎”现象，颗粒沿其晶体方向解离，使其能量利用率极高，粉碎粒度细而均匀，并在一定范围可调。由于整机具有良好的密封性能，可使被粉碎物料隔绝空气，实施充惰性气体保护，避免氧化，防止燃烧和爆炸。该机主要可适用于抗压强度不大于250Mpa，给料粒度不大于5㎜的各种固体脆性物料的粉碎，并已经历多年实践，在上述等多种特殊行业得到广泛应用。

Sealed double-roll crusher is a kind of  sealed high-pressure roll crushing equipment specially designed according to  the theory of “layer press crushing” for special industries such as rare earth  materials, metallic oxide, charging alloy and metallic silicon. What set this  machine apart from common roll grinder are: the pressure between two rollers  rotating in opposite directions can be very high to enable high energy utilized  ratio; the granule sizes after crushing are fine and uniform and can be  adjusted within a certain range. Since the complete machine enjoys satisfactory  sealing property, the crushed materials can be isolated from the air, to fill  inert gas for protection, avoid oxidation, as well as prevent combustion and  explosion. This machine is mainly used to crush all kinds of brittle solid  materials with compressive strength of not larger than 250Mpa and granule size  of not larger than 5mm. After  many years of practice, this type of machine is widely applied in a number of  special industries including those listed above.