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首先分析了热烧结矿筛分机 (简称热矿筛 )筛板使用寿命短的主要原因是由于筛板材质高温硬度低、高温耐磨性差。为了提高热矿筛的工作效率 ,提出了改进热矿筛筛板材质的必要性 ,并对新筛板材质的化学成分进行了科学设计 ,同时对新筛板的铸造及热处理工艺进行了探讨。研究结果表明 ,新研制的筛板使用安全、可靠 ,使用寿命达到CrMnN筛板的两倍 ,价格与CrMnN筛板相当 ,若在全国推广这种筛板 ,将会产生显著的经济效益。
First of all, the main reason of the short service life of the sieve of the thermal sinter screening machine (referred to as the hot mineral sieve) is that the material of the sieve plate has low hardness at high temperature and poor wear resistance at high temperature. In order to improve the working efficiency of hot mineral sieve, the necessity of improving the material of hot sieve is proposed. The chemical composition of the new sieve material is scientifically designed, and the casting of the new sieve plate and the heat treatment process are also discussed. The results show that the newly developed sieve plate is safe and reliable, and its service life reaches twice that of CrMnN sieve plate. The price is equivalent to that of CrMnN sieve plate. If this sieve plate is popularized throughout the country, it will bring significant economic benefits.