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一种熔渣干式粒化法现已开发出来,可用以生产出许多工业产品,如水泥、筑路骨料、农用促进剂、滤床滤料,并且在环保方面比传统的熔渣处理方法具有更多的优点。 相似文献
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《Baosteel Technical Research》2010,(Z1):138
In present,the wet-based pattern is mainly adopted to deal with the steel slag by steel plant at home and abroad,the wet-based technology has some defects;Wasting of water,pollution of the environment,and the slag has not been fully recycled.This paper presents a new method,which is aimed to realize dry granulation,waste heat recovery and comprehensive utilizing the steel slag.According to the ideas of wind quenching granulation,the heating slag from the converter furnace,was bring to the granulation heat exchange system,through the process of breaking in a container,the granulation heat exchange system has the functions of feeding continuously and heat exchange.The heat air,through the diversion tubes,could be recycled in removing the dust.The granulation slag could be bring to a confined roller,granulating and cooling secondarily.The roller export was connected to a magnetic separator.The separated iron could be recycled,and the remaining slag could also be reused as building materials,in process of stabilization and secondary magnetic separation.The heated air could be guided into the boiler to generate the steam,which can be used to generate electricity,or use as cleaned energy,realizing the target to recycle the waste heat in steel slag.The highlights of the new method are dry granulation and waste heat recovery.This paper states the process of heat exchange between the air and the steel slag in the system of granulation heat exchange in the new technical process.In theory,it has been proved reasonable with the the system of granulation heat exchange,and also the work conditions has been optimized. 相似文献
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全球钢铁行业每年有数以亿吨计的熔渣产生,并且越来越多的高炉渣通过水淬粒化处理而生产一种玻璃质产品。这种物质作为硅酸盐水泥的替代物,可以带来可观的价值增值,同时减少了由于石灰石煅烧而产生的CO2排放。然而,水淬粒化渣处理却需要消耗大量的水资源,并且可能带来有害气体排放。更为重要的是,现有的渣处理工艺没有回收其中所含有的热量(大约1.8GJ/t渣)。熔渣干式粒化(DSG)是渣处理领域发生的根本性变革。在这种新的处理方法中,熔渣在旋转盘中由于离心力的作用而自动分离,产生的熔滴在空气的作用下快速急冷固化,同时可回收热能。由DSG工艺处理得到的固态粒渣适用于生产水泥,同时产生的热空气(约500~600℃)可作为现场就地利用的热源。DSG工艺同水淬法相比,在节水、减少排放、余热回收、减少能源消耗和温室气体排放等方面,提供了一种更加可持续的处理方法。澳大利亚联邦科学与工业研究组织对DSG工艺的研究始于2002年,并且在工艺设计创新方面已经取得重大的突破。近期与博思格和一钢公司(澳大利亚钢铁行业CO2减排关键问题解决计划成员之一)合作,研究工作已经拓展到了渣中的热能回收方面。试验设备的应用已经成功验证了这种处理理念,渣处理能力达到了10kg/min,渣处理产品的评估以及初步的技术经济分析取得了令人满意的结果。新工艺的处理规模扩大了一个数量级,并且建造了一个半工业化规模的装置(渣处理能力提高到了100kg/min),业已投入运行,用于对工艺设计进行深度优化和论证。如果一切顺利的话,计划在两年内建立一个更具规模的工业化工厂(熔渣放流速度达到1~2t/min)。介绍了这项新工艺的进展情况,并对近期的一些进展进行了总结。 相似文献