威尔逊公司和洛氏公司,由于采用了里查德公司最近发明的气体燃烧式的铸造用砂热法再生装置,从而降低了新砂和砂处理所需费用。 英国采用热法再生砂已有20年历史。初期的装置只用来处理昂贵的壳型铸型用锆砂。 最近,在主要使用苯酚氨基甲酸乙酯的自动化工厂中,由于机械法 Wilson and Rockwell, Inc., have reduced the costs of new sand and sand treatment due to the gas combustion foundry sand heat recovery unit recently invented by Richard. Britain has adopted thermal regeneration sand 20 years of history. The initial installation was only used to deal with expensive zirconium sand for shell molds. Recently, in an automated factory that mainly uses phenol urethane, due to the mechanical method