Pouring materials for mixed iron - smelting furnace and foundry ladle feature a longer service life convenient construction and easy maintenance and are best choice of refractory for mixed iron - smelting furnace to the requirement of metallurgical facilities including medium and small mixed iron furnaces 混铁炉、铁水包浇注料使用寿命长,施工方便,易于维修,是混铁炉用耐火材料的最佳材料,以适用中小型混铁炉等冶炼设施的需要。
Chemical industry information not merely embodyed the ordinary chemistry information substance , chemistry manufacture technological process and representative installation introduction are still have , in case contacing legal institutions sulphuric acid ? nitric acid industry system law ( ammonia oxidate law ) , synthetic ammonia industry , chlorine and caustic soda are manufacture to electrolysis salt water , along with electrogilding , refine aluminium , iron - smelting and steel - smelting , cement and glass manufacture summarized account , the mineral oil is refined , hence , the chemical industry information education is contrastd against the ordinary chemistry information education , proper such representative means , be living , the means interpreted is in speech oridinarily wholly adoptd in the chemical industry information education , now most of tutors also is adopt the means interpreted in speech , cause that the chemical industry information education is insipid like this , student lack interest to chemical industry information study , but as a result of value the pair foundation , light practice , student may say the become a mere formality to chemical industry information study o since multi - med 化工知识不仅包含了一般化学知识的内容，还带有化学生产工艺流程及典型设备的介绍，如接触法制硫酸，硝酸的工业制法(氨氧化法) ，合成氨工业，电解食盐水制造氯气和烧碱，以及电镀、炼铝、炼铁和炼钢，水泥和玻璃的生产简介，石油的炼制等，因此，化工知识教学与一般化学知识教学相比，应有其典型的方法。在过去，化工知识的教学一般都采用口头讲解的方法，现在大多数教师也是采用口头讲解的方法，这样使得化工知识的教学乏味，学生对化工知识的学习缺乏兴趣，又因重视双基，轻实践，学生对化工知识的学习可以说流于形式。由于多媒体的辅助教学的高效性、形象直观性、新颖性和多样性、人工模拟等特点，很适合化工知识的教学，应用多媒体教学化工知识可以解决目前存在的诸多问题，如：模型短缺、组织参观活动困难、教育经费不足、学生不易观察等。
