轧钢废水深度处理及生态化再生利用技术

人工湿地技术以其较低的运行成本及简便的管理模式近年来被广泛地应用在工业废水深度处理和污水的再生回用中.采用锰砂和砾石填料的人工湿地试验装置应用在轧钢废水深度处理中,并对污染物的去除效果进行了分析,利用人工湿地中的填料、微生物、植物协同作用研究轧钢废水中COD和总磷等污染物的去除效果,研究发现,经过湿地处理后,COD等出水水质指标能够满足《城市污水再生利用工业用水水质》(GB/T19923-2005)标准.     

护厂河水资源在宝钢生产中的循环经济利用

钢铁工业可持续发展,必须走低能耗、低物耗、少排放的清洁生产发展道路.宝钢对废水资源合理规划,水质的分类、调控,管网的布置增配,以及护厂河废水作为第二资源的开发,使得宝钢水资源利用走向循环经济利用轨道.     

二道河硫化铅锌矿废水分步处理与回用工艺方法探讨

研究提供了一种铅锌矿废水处理及利用技术,通过分析各处废水水质,结合选矿对水质要求,有针对性处理、回用,解决了废水回用影响选矿指标及外排污染环境的问题,既保证废水零外排,又不影响选矿指标且投资少、费用低。为硫化铅锌矿矿山废水分步处理及分质利用工艺提供了整套矿山废水处理和循环使用方法。     

冶金工业综合废水集中处理实践

涟源钢铁集团有限公司投资近3800万元,于1999年10月建成冶金工业综合废水集中处理厂。主要处理轧钢厂外排废水、转炉炼钢厂外排废水、焦化外排废水等综合工业废水,设计处理能力为8万t／d。采用格栅、沉砂、调节隔油、絮凝反应、平流沉淀、过滤池、自然冷却塔及并网回用等先进处理工艺。经过近二年的运行实践,探索出了有效的经济运行方式,取得了冶金工业综合废水集中处理运行经验,其废水处理水量达100％,并实现回用水量95％,创造了显的经济效益和社会环保效益。     

包钢给水厂25~#泵站受到腐蚀的原因及治理方向

几年来的运行实践证明:包钢带钢厂外排的酸洗废水虽然加纯碱处理至中性,但是仍然具有很强的腐蚀性.其根源在于废水中所含的H~(+)、CI~(-)、Fe(?)Fe(?)等大量化学物质以及因此而产生的电锈蚀.若对这股废水进行深度处理并使之达到工业用水标准在生产中回用,将是解决这一问题的治理方向和根本出路.     

马钢彩涂板厂废水处理系统改造

马钢彩涂板厂原废水处理系统外排水水质难以达到国家有关污水综合排放标准。后将废水处理系统由物化———生化处理方法改造为纯物化处理方法,改造后,系统操作简单,运行费用低,处理效果稳定,可靠性强。CODcr、油、悬浮物和PH值四项考核指标均达标。     

人工湿地在酸性矿山废水处理中的应用

随着经济建设的快速发展,我国矿山废水产生的环境问题日益严重,矿山废水的污染已成为制约矿业经济可持续发展的主要因素之一。文章介绍了酸性主要污染物及其危害,人工湿地处理系统的特点及利用人工湿地系统处理酸性矿山废水的机理与效能。     

宝钢厂区1995～1999年外排废水水质状况分析与评价

通过对宝钢厂区1^#、2^#、3^#泵站及弃渣场排口1995－1999年外排放心水监测数据的整理，利用图表和数学公式分析并评价了宝钢厂区近5年的水质状况。     

曝气条件下氧化锰砂处理含锰废水研究及工程应用

低浓度含锰废水由于资源化回收价值不大,需要一种低成本的水处理工艺。针对低浓度含锰废水特征,开展了在曝气条件下利用氧化锰砂处理含锰废水的试验研究,结果显示废水的初始pH值对除锰效果影响显著,不同种类的氧化锰砂对除锰效果影响不大。含锰废水经处理后,锰浓度可从23 mg/L下降到0.46 mg/L,达到Mn~(2+)浓度低于2 mg/L的排放指标要求。工程应用表明,曝气条件下锰砂滤池可以有效去除溶液中的Mn~(2+),含锰和氨氮在15 mg/L以内的废水,通过处理均能达到(GB 8978-1996)排放指标要求,每立方米废水的运行费用0.675元,运行成本低,对于低浓度含锰废水曝气条件下锰砂接触氧化是一种简单有效、经济可行的水处理工艺。     

莱钢焦化废水循环利用实践

针对莱钢炼铁吸收焦化废水过程中出现的水质差、污染严重、泡沫淤积影响设备稳定运行等焦点问题,通过废水回收设备扩容改造、合理分流、应用消泡技术、强制降温等改进措施,年可接受焦化废水98万t,保证了焦化废水正常循环使用,杜绝了焦化废水外排的问题。     

钢铁工业废水深度处理回用技术研究

对经常规工艺处理后,浊度、部分有机物和铁、锰等指标不能达到回用水水质标准的钢铁工业废水,进行生物活性炭深度处理回用技术研究,分析了生物活性炭对各污染物的去除效率。     

炼钢废水处理及中水回用技术的研究进展

本文主要针对我国钢铁行业产生的废水实际情况,对废水来源以及炼钢废水当中的主要污染物质与污水处理工艺进行了分析,期望提升中水回用率,尽可能的减少在进行炼钢时所补充的新鲜水量,以供参考。     

Treatment of Reused Comprehensive Wastewater in Iron and Steel Industry With Electrosorption Technology

 Electrosorption technology was used to treat the reused comprehensive wastewater from iron and steel industry. A problem of relatively high conductivity of wastewater which greatly affects the reuse was examined, and industrial test was conducted for the reused water advanced deionization and purification in a comprehensive wastewater treatment plant of WISCO [Wuhan Iron and Steel (Group) Corporation]. The results of the on site industrial test showed a satisfactory treatment performance for the reused water even at a flow rate of 1000 L/h in a standard 500 L/h unit. The average conductivity decreased by about 70%, from 580-780 μS/cm to 100-350 μS/cm. The average removal efficiency of Cl- and Ca2+ was about 75% and 68%, respectively, and CODCr of the treated water was also reduced in some degree while the pH value was almost unchanged. The energy consumption was as low as 06 kWh/t, which was remarkably superior to the conventional technologies. Therefore, it is entirely feasible that the novel electrosorption technology can be used in enhanced desalination and purification treatment of reused comprehensive wastewater in iron and steel industry.     

转炉终点钢水残锰质量分数及其影响因素分析

通过对转炉终点生产数据和铁水成分的统计分析,研究了影响转炉终点钢水残锰含量的因素及其变化规律。研究表明,转炉终点碳含量和铁水硅含量对转炉终点钢水残锰含量及其收得率影响最大;提高转炉终渣碱度和终渣FeO含量对转炉终点钢水残锰含量及锰收得率产生不利影响。铁水初始锰含量升高有利于提高转炉终点钢水残锰含量,但锰的收得率反而下降;在高拉碳条件下转炉终点钢水温度对锰收得率的影响不明显。     

湖南省工业废水中铁锰排放标准研究

通过对湖南省典型铁锰污染区域的钢铁、有色金属、电解锰及化工企业生产工艺、废水处理技术与污染物排放现状及受污染河流环境质量现状进行调查的基础上,参照国外废水中铁锰污染物排放限值,规定湖南省工业废水中现有企业总铁的排放标准限值为10 mg/L,新建企业废水中总铁排放标准限值为5 mg/L;湖南省工业废水中总锰的排放标准限值为1 mg/L.     

不锈钢分公司中水回用的研究

吨钢耗新水指标是衡量钢铁联合企业水耗水平的一个重要指标,宝钢股份不锈钢分公司能源部为了降低公司吨钢耗新水指标,着手研究公司生活污水、生产废水的回用工作.分析了全厂污水站外排水深度处理的难点技术,对比了几种除盐方法,提出了反渗透技术的优势及关键点.拟通过新建公司中水站,将部分过滤水与部分脱盐水相互掺合,既达到了目的,又节约了成本,最终将公司部分生活污水、生产废水通过深度处理,达到或高于工业水水质标准,直接用于生产.     

Integrated treatment of GCP and slag quenching water of LD steel making unit

The scarcity of water has driven every steel plant in India to pursue major water conservation initiatives. R&;D Tata Steel Jamshedpur has invented an integrated and cost effective process for treatment and reuse of steel making gas cleaning plant (GCP) wastewater and Linz-Donawitz (LD) slag quenching (SQ) wastewater. The new treatment process consists of mixing of GCP water with SQ wastewater in a specific ratio followed by coagulant addition and controlled carbon dioxide (CO₂) sparging. The average total suspended solid (TSS) and total dissolve solids (TDS) concentration of treated water were observed to be 22 and 190?mg?L^?1 during 180 days of continuous monitoring. Thus the water quality falls well within the limits for reuse and recycle standards within the plants. The maximum allowable limit of TDS and TSS for industrial water supplies is 500 and 100?ppm, respectively. The process significantly reduces the water requirement for steel making and paves the path for conversion of LD steel making process into a sustainable ‘Zero Liquid Discharge’ unit.     

The Behaviour of Selenium Impurities During the Addition of Se‐Containing Manganese to Steel Melt

Manganese is an important alloy addition for alloy steels. It is normally added to steel melts as ferromanganese. However, for the adjustment of melt composition, manganese metal is used as a trimming addition since it has lower levels of impurities than ferromanganese. The manganese used for this purpose is obtained from the electrolytic processing route wherein selenium‐containing additives are added to the electrolyte bath to improve the current efficiency. This practice introduces selenium to the manganese metal. Given that selenium and its compounds are potentially toxic and damaging to the work place and environment, effluents have to be treated in a controlled manner. In order to determine how selenium typically distributes between molten steel, slag and gas phases, a laboratory‐scale experimental study was carried out to evaluate the deportment of selenium following the addition of selenium containing manganese to the steel melt. Contaminated commercial manganese metal, as well as Mn‐Al‐Se spiked briquettes with different selenium contents were added to steel melts at 1600 °C. Selenium recovery to the solidified steel samples varied from 16% to 75%, depending on selenium levels of additions. Owing to the high vapour pressure of selenium, significant amounts of the selenium added to the melt evaporated, reacting with air to form selenium dioxide. SEM analysis of the solidified steel samples revealed that the selenium was largely present as manganese selenide (MnSe) in the form of spherical inclusions within the iron matrix. A thermodynamic assessment on the potential formation of possible selenium compounds within the steel melt suggests that the most stable selenium compound under the test conditions is MnSe, in accord with experiments.     

膜法深度处理在企业废水回用中的应用

钢铁企业废水回用已经成为一种必然的趋势。随着膜法深度处理技术的发展和膜市场的成熟,膜法深度处理已经越来越多的应用于钢铁企业废水回用中。根据钢铁企业废水水质特征,探讨了相应的回用水工艺,并提出了废水回用存在的问题。     

中高锰铁水对萍钢转炉冶炼影响的探讨

分析中高锰铁水在转炉冶炼过程中的终点锰与渣系碱度、氧化铁间的关系以及中高锰铁水对转炉现有操作水平的影响,针对萍钢二钢厂铁水锰波动大的特点,提出了对中高锰铁水进行冶炼的操作技术指导。