涟钢投产以来对砂口曾进行多次改进,先后使用过:全部用耐火砖砌筑,大梁改用电炉石墨碳棒,活动砂口(即在铁箱内用铺沟泥捣制成的)和用焙烧炭砖砌筑成的砂口。这些砂口都没有得到满意的效果。因此又借鉴高炉炭捣的成功经验,于1980年9月设计制造了一种水冷炭捣砂口,经过几年的实践,证明其效果良好,寿命较长(见表1)。 Lianyuan Iron and Steel has put into operation since the sand mouth has been repeatedly improved, has used: all with refractory brick masonry, the switch to the electric furnace graphite carbon rod, active sand mouth (that is, in the iron box with mud dredging mud ditch) And with roasted charcoal brick masonry mouth. These sand mouth are not satisfactory results. Therefore, drawing on the successful experience of blast furnace carbon pounding, a kind of water-cooled carbon sand blasting port was designed and manufactured in September 1980. After several years of practice, it has been proved to be effective and has a long service life (Table 1).