据报导,天津纺织机械厂为解决小铸件凹角部位粘砂问题,在铁水中适当地提高了含磷量,基本上消除了粘砂。原来铁水含磷量为0.05％左右,经过实验提高到0.1～0.15％之间,清砂很容易。对一般粘砂的铸件,含磷量可控制在0.1％左右,粘砂较严重的可提高到0.15％,甚至到0.2％。该厂目前采用的铁水成分为:C3.4～3.5％,Si2～2.2％、Mn0.6～0.8％、S<0.15％、P0.1～0.15％ It is reported that Tianjin Textile Machinery Factory to solve the problem of sticking sand concave parts of small castings, in the molten iron to properly increase the phosphorus content, basically eliminating the sticky sand. The original phosphorus content of molten iron is about 0.05%, after experiments increased to between 0.1 ~ 0.15%, sand cleaning is easy. The general sticky sand castings, phosphorus content can be controlled at about 0.1%, more serious sticky sand can be increased to 0.15%, or even to 0.2%. The hot metal used in the plant is C3.4 ~ 3.5%, Si2 ~ 2.2%, Mn0.6 ~ 0.8%, S <0.15%, P0.1 ~ 0.15%