利用吨焦煤耗的4种估算方法，分别对7m焦炉和7．63m焦炉的吨焦煤耗进行计算。分析表明，干熄焦烧损率对吨焦煤耗影响较大。利用焦炉装煤量和电子秤配煤2种估算方法能较准确地反映实际吨焦煤耗。

The coal consumption per ton coke of 7m battery and 7.63m battery is calculated by four methods .It shows that CDQ burning loss rate has more influence to coal consumption per ton coke .By coal charging quantity and coal blending with electronic scale can reflect the actual coal consumption per ton coke more accurately .

针对云南褐煤半焦的独特性能，试验用褐煤半焦替代冶金焦生产电石。研究了褐煤半焦粒度、活性、灰分等指标对生产电石的影响。研究表明：褐煤半焦入炉粒度<4mm 的组分不应超过10%，半焦化学活性高对生产电石有利，但同时提高了还原剂灰分中有害物质的还原率，对生产电石不利，所以褐煤半焦用作生产电石的灰分不应大于7%。试验说明用褐煤半焦部分替代冶金焦生产电石是可行的，并有一定的节电降耗作用。

In view of the unique properties of Yunnan lignite semi-coke, an experiment on the production of calcium carbide has been carried out with lignite semi-coke to replace metallurgical coke partly. Study focus on the impact of lignite semi-coke particle size, reactivity, ash and other indicators on the production of calcium carbide. The study shows that the particle size less than 4mm component of semi-coke should not exceed 10%. The high reactivity property of semi-coke is favorable to the calcium carbide production, but also improves the reduction rate of harmful substances in ash, and adverse to the production of calcium carbide, so the ash content in the semi-coke should not be over 7%. The eexperiment indicates partial substitution of lignite semi-coke for metallurgical coke in the calcium carbide production is feasible, and has a certain role in saving energy.

采用以低杂质沥青焦模拟石油焦和外掺杂的方式，研究硫杂质元素对焦反应性的影响，并通过XRD、SEM和EDS等检测手段探讨其作用机理。结果表明：在无其他杂质元素干扰的情况下，硫实际上是一种对焦的空气和CO2反应性都具有明显催化性的杂质元素。其催化作用可能是通过在焦的空气和CO2反应过程中分别引发有机硫→H2S→SO2→COS和单质硫(Sx)→SO2和有机硫→H2S→COS→Sx→C2S→COS两组可部分循环并具有增加碳耗和增大焦比表面积作用的反应体系来实现的。

Effect of sulfur impurity on coke reactivity was investigated by simulating petroleum coke with low-impurity pitch coke and impurities doping. And its mechanism was discussed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS). The results show that sulfur has strong catalysis on both air and CO2 reactivity of coke in the case of no other impurity interference. Its catalysis is probably realized by triggering organic sulfur→H2S→SO2→COS and elemental sulfur (Sx)→SO2 and organic sulfur→H2S→COS→Sx→C2S→COS reaction systems during coke?O2 and coke?CO2 reactions, respectively, which are partly circular with functions of increasing carbon consumption and enlarging coke specific surface area.

为降低炼铁成本,济钢集团公司炼铁厂采取了配加经济料褐铁矿印尼粉的措施。由于印尼粉含铁品位低、含有结晶水、铝含量较高,用于烧结生产易造成烧结固体燃耗升高、烧结矿强度及烧结成品率低等问题,为稳定烧结矿质量,济钢400 m2烧结机生产采取了提高料层厚度、调整一二混圆筒加水量、稳定焦粉粒度、适当压料、控制终点温度等系列措施,改善了烧成率,稳定了烧结生产。

In order to cut down the cost of ironmaking, the measure with addition of economic limonite Indonesian iron fine ore in General Ironmaking Plant of Jinan Iron & Steel Group Co. has been taken, but such problems as high consumption of solid fuel in sintering production, low sinter strength and low yield of finished sintered products caused by addition of the limonite Indonesian iron fine ore in sinter production still remain due to the Indonesian iron fine ore with low iron grade and containing crystallization water as well as high content of aluminum. And for this a series of measures are taken such as increasing the thickness of iron materials -charging layer, adjusting the water amount added into No.1 and No.2 cylinder mixing machine, keeping the size of fine coke constant, compacting the materials in appropriate way and controlling the end point temperature in 400 m2 sintering machine in Jigang in order to stabilize the quality of the sinter. After the measures are taken,

新冶钢"实施低成本"战略以来,铁前系统紧紧围绕公司生产要求,在外部条件劣化的背景下,始终围绕高炉的稳定顺行为基本方针,不断优化原、烧系统配矿方案;高炉通过加强原燃料管理,不断优化炉料和燃料结构,提高烧结矿、块矿和焦丁比例,不断优化高炉操作制度、提高煤比和富氧率,实现了高炉合理的煤气流分布和较高的煤气利用率,保持了高炉的长期稳定顺行;烧结固体燃耗、高炉燃料比等技术经济指标及工序制造成本不断降低,基本达到了经济炼铁的目标。

The practice of the process control of low-cost ironmaking in Xinye Iron and Steel Group Co.was summa-rized.To achieve the goal of low cost of ironmaking,each department of the ironmaking plant made great efforts. On the basis of stable and smooth operation of BF,several key measures have been taken including optimization of ore blending of sintering,strengthening management of ore before charging,increase in the ratio of sinter,lumpy ore and nut coke in every charging batch,and enhancement of the ratio of pulverized coal injection and enriched oxy-gen.Via those measures,reasonable gas distribution and efficient gas utilization in the BF are realized,which leads to the smooth and stable operation of BF,low fuel consumption of sintering and BF,and decrease of other manufac-turing cost,thereby achieving the target of economic ironmaking.