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我国机器制造工业所用铸钢,采用平炉、电炉和酸性转炉三种冶炼方法。这些方法的主要原料是废钢和低磷生铁。根据我国铁矿含量来看,绝大部分是磷的含量高。虽然我国也能生产一小部分低磷生铁(含磷0．06%以下),但只能供应冶金工业的使用。近年来我国钢铁利用率不断提高,废钢的回收率不断降低,废钢和低磷生铁供应不足与机械生产发展形成了尖锐矛盾。废钢不足不仅是我国数年来实际存在的情况,而且也是世界性长期不能解决的问题。为了解决此种供应不足,使机器制造工业鼓足干劲、力争上游,多、快、好、省地进行生产大跃进,就必须在铸钢方面打破常规,从我国资源实际
China’s steel used in machinery manufacturing industry, using open hearth, electric furnace and sour three smelting methods. The main raw materials for these processes are scrap and low-phosphorus pig iron. According to China’s iron ore content point of view, the vast majority of high phosphorus content. Although our country can also produce a small part of low-phosphorus pig iron (containing less than 0.06% phosphorus), it can only be used in the metallurgical industry. In recent years, China’s steel utilization continues to increase, the recovery rate of scrap steel continues to decline, lack of supply of scrap and low-phosphorus pig iron and mechanical production and development has formed a sharp contradiction. Insufficient scrap is not only the reality that has existed in our country for several years, but also a problem that can not be solved in the world for a long time. In order to solve such a shortage of supply, make the machinery manufacturing industry drum up enough strength and strive to make a great leap forward in production upstream, more, faster, better and more economically, we must break the routine in the field of steel casting,