Improving the production of chrome sinter

The chemical and mineralogical composition of sintering batch is determined by chemical and differential thermal analysis. Local clay is found to melt at the lowest temperatures and may be used to obtain chrome sinter. Mathematical modeling of the sintering of chrome fines permits the determination of the optimal sintering parameters. On the basis of this research, high-quality chrome sinter is obtained for the electrosmelting of ferrochrome.     

烧结原料理论液相量对烧结矿质量的影响

在高澳矿配比下,研究了烧结原料理论液相量对烧结行为及烧结矿质量指标的影响.对烧结原料中的5种铁矿粉进行微型烧结实验.结果表明：铁矿粉液相生成能力与原料中 FeO、SiO2、CaO、MgO、Al2 O3含量密切相关.随烧结理论液相量增多,成品烧结矿成本增加,烧结杯利用系数和烧结矿转鼓指数均相应提高.在烧结生产中,理论液相的质量分数不宜控制在10.40％~12.22％范围内.低于此范围,在原料成本较低情况下可以得到强度适宜的烧结矿;高于此范围,虽然原料成本增多,但烧结矿强度指标会明显改善,对后续的高炉生产有益.     

A neural network based model of sinter quality and sinter plant performance indices

Abstract

A prerequisite of a smooth operation of the ironmaking blast furnace is that the quality of the burden is stable. In blast furnaces where sinter is used as the (main) iron bearing material, its quality plays a crucial role in productivity and fuel economy. Simultaneously the corresponding factors must be considered for the sinter plant. The present paper studies the influence of three variables characterising the bedding piles and five sinter plant operation variables on sinter quality, sinter plant productivity, specific fuel consumption and share of cold return fines. Daily mean values for a period of five years of operation were used in the data driven modelling based on feedforward neural networks. The resulting models were found to describe the major changes in the outputs well. The input–output relations captured by the models were analysed by perturbing one input variable of the networks at a time and analysing the predicted behaviour of the outputs.     

安钢高炉提高烧结矿入炉质量的措施及效果

近几年来安钢炼铁厂严把烧结矿质量关,通过优化炉料结构调整,使烧结矿入炉粉末从1997年的10.46%降到2000年的3.15%.在2000年高炉原料入炉品位达到58.86%,高炉利用系数超过3.0,焦比降到了440kg/t,全年生铁产量突破210万t.     

唐钢一炼铁厂提高烧结矿质量的实践

介绍了唐钢第一炼铁厂近几年来围绕提高烧结矿质量 ,满足高炉冶炼需求所做的大量工作及成效 ,并提出了今后的打算     

Correlating mechanical properties of sinter phases with their chemistry and its effect on sinter quality

In this study, pot sinter tests were carried out to study the sintering properties of iron ores of different alumina (2–4–6%) level. It was observed that the 6% alumina level ores have a higher RDI values and decreased tumbler index (TI) compared to its other two counterparts. It was observed that an increase in composite fracture toughness (CFT) of sinter improves the Tumbler as well as RDI of the sinter. Beyond 4 CFT there is remarkable improvement in TI, RDI and RI values. The mechanical strength parameters of sinter phases were further correlated and analysed with respect to the chemistry of sinter and mineralogy of sinter phases. There is strong evidence which suggests that the Al₂O₃ deteriorates the strength of the phases by making them hard and thus generating cracks in them. Unlike alumina, CaO and SiO₂ tend to stabilise and improve the strength of the phase.