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1. 发明专利

JPS62186956A METHOD FOR REDUCING SALT CONTENT IN FINE AGGREGATE 失效
公开(公告)号：JPS62186956A
公开(公告)日：1987-08-15
申请号：JP2690686
申请日：1986-02-12
申请人： ITO YASURO
发明人： AIDA SEIICHI , ARAI ATSUTOSHI , ABE ZENETSU , YAMAMOTO YASUHIRO
IPC分类号： B03B5/00
摘要： PURPOSE:To obtain the aggregate for concrete with a reduced amt. of deposited salt by preliminarily washing sea sand, etc., which are used as fine aggregate, primarily dehydrating the sand in an unbrella-shaped rotary dehydrator, and then secondarily dehydrating the sand by colliding the sand with a rotor. CONSTITUTION:With respect to the method for reducing the salt content of fine aggregate such as sea sand, a water chamber 22 is formed at the lower part of a cylindrical body 21 constituting a classifier 2 in the preliminary washing mechanism, and raw sand 1 is agitated by fresh water continuously supplied into the water chamber 22. The raw sand 1 is received by a hopper 34 in the primary dehydration mechanism, and discharged into a rotary dehydrator by the air from a blower 31 of a dehydration cylinder 32. The sand is collided with the vertical plane of the rotary dehydrator, rebounded, and splashed in the umbrella, the raw sand 1 and foreign matter such as sludge are separated, and muddy water 4 contg. salt is discharged from fine holes. Finally, the raw sand 1 is collided with a rotating roller 51 in the secondary dehydration mechanism, and dehydrated. The salt content is effectively reduced in this way.

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