滤布放松、压滤板框闭合当压滤板框闭合后，矿浆供给气动夹紧阀打开，矿浆通过软管分别进入各雅旅伴框矿浆---滤饼腔而进行过滤，滤液通过滤布进入滤液腔而排出，此时滤饼初步形成。(filter cloth relaxation and press filter plate fr a me closure when the press plate is closed, the pulp supply pneumatic clamping valv