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由宁国铸钢厂研制及郑州铝厂应用的高韧性低铬合金铸球于1991年6月27—29日在北京通过中国有色金属工业总公司组织的技术鉴定。该球的工业应用结果表明磨矿作业单耗由原采用的45号锻钢球的1620克/吨降至52I克/吨,耐磨性能提高了3.1倍,磨矿成本由2.51元/吨下降到1.41元/吨(降低43.8％),郑州铝厂每年粉磨铝土矿石80万吨,可节省资金88万元。工业试验用球破碎率为0.36％,磨球质量属国内先进水平。该球(φ120毫
The high-toughness, low-chromium alloy cast ball developed by Ningguo Steel Plant and applied to Zhengzhou Aluminum Plant passed the technical appraisal organized by China Nonferrous Metal Industry Corporation in Beijing on June 27-29, 1991. The ball’s industrial application results show that grinding unit consumption dropped from 1620g / tonne of the original 45 forged steel ball to 52Ig / tonne, abrasion resistance increased 3.1 times and grinding cost decreased from 2.51 yuan / ton To 1.41 yuan / ton (down 43.8%), Zhengzhou Aluminum Mill 800000 tons of bauxite each year, saving 880,000 yuan. Industrial test ball crushing rate of 0.36%, ball quality is a domestic advanced level. The ball (φ120 毫