共查询到19条相似文献,搜索用时 163 毫秒
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在介绍高炉渣组分和处理方法的基础上,着重介绍了高炉渣的各种综合利用技术的现状,以及我国高炉渣综合利用中还存在的问题,并对高炉渣利甩的未来发展趋势提出了几点建议。 相似文献
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含钛高炉渣光催化降解邻硝基酚的实验研究 总被引:5,自引:0,他引:5
研究了用处理过的含钛高炉渣作为光催化材料光催化降解邻硝基酚溶液,并探讨了影响其光催化性的多种影响因素,以寻求含钛高炉渣综合利用的新途径.实验结果表明:含钛高炉渣作为光催化材料对邻硝基酚溶液有降解作用;邻硝基酚溶液的浓度越低,降解率越高.本实验中,用负载于玻璃片的含钛高炉渣降解邻硝基酚溶液时,最佳溶液浓度为15mg/L;邻硝基酚溶液的pH值为3.0时降解率最大;对邻硝基酚溶液施加电压可提高光催化效率,降解率随电压的增大而增大. 相似文献
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任至舒 《技术监督实用技术》1995,(3)
钢水温度的快速测量河北唐山钢铁集团任至舒在钢的冶炼过程中,钠水的温度直接影响生产的进行.钢水温度过高,将造成脱氧剂的浇损大,脱氧能力减小,对炉衬浸蚀严重,而氧化镁大量进入炉渣还使炉渣变稠.温度过高炉渣变化快,炭粉硅铁粉加入量增多,钢水容易增碳、增硅,... 相似文献
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循环流化床锅炉高温炉渣的冷却和连续排放是制约其发展的一个重要阅题,尤其在燃用高灰份的低热质燃料时,大量的高温炉渣的排放不仅影响了锅炉运行的安全性,同时,大量的物理热损失也直接影响到锅炉运行的经济性。因此,解决炉渣的冷却和连续排放对于循环流化床锅炉来说具有重要意义。 相似文献
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基于低钛高炉渣资源化综合利用和提高转炉半钢炼钢脱磷效果的考虑,对低钛高炉渣进行喷吹CO_2法脱硫处理后,配入25%~30%的氧化铁皮制备成半钢化渣球用于半钢炼钢。采用建立半钢渣系的脱磷热力学模型和工业试验的方法,对此半钢化渣球冶炼半钢的脱磷能力和冶金效果进行研究。研究结果表明:随着炉渣中TiO_2和Al_2O_3含量的升高,炉渣的脱磷能力降低,特别是当炉渣碱度和温度较低时,脱磷能力降低更快;在两种氧化物含量相同的情况下,TiO_2比Al_2O_3的负面影响更大;随炉渣碱度的增加,炉渣的磷分配比和磷容量均呈先升高后持平的趋势;随渣中w(FeO)的增加,炉渣的磷分配比和磷容量均先升高后降低;随w(MgO)的降低,炉渣的磷分配比和磷容量逐渐降低。采用半钢化渣球冶炼半钢,渣中w(TiO_2+Al_2O_3)和w(FeO)升高,炉渣碱度和w(MgO)降低,控制炉渣碱度在4.0左右,炉渣不仅具有较高的磷分配比和磷容量,并且可以弱化(TiO_2+Al_2O_3)对脱磷能力的影响,确定其加入比例为总渣量的15.0%~20.0%。留渣+化渣球法冶炼半钢的前期平均脱磷率增至58.59%,为原冶炼工艺的1.57倍,吨钢石灰消耗和终点钢水[O]含量分别下降3.48kg/t和112×10-6。 相似文献
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This survey consists in finding a possible and useful application, to the main by-product of the steel-making industry in Tunisia: the blast furnace slag. The weak hydraulic index of the present Tunisian blast furnace slag cannot permit an efficient utilization as addition to the cement. But its use directly in concretes, as aggregates by partial or total substitution to the flinty sands and the chalky gravels, would be interesting to several points of view: workability, resistance, durability, economy and ecology. The objective of this work is to develop in Tunisia a new concrete using blast furnace slag aggregates. 相似文献
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为研究高炉钛渣的高附加值利用,采用静态吸附法研究了高炉钛渣对废润滑油的吸附性能,考察了高炉钛渣投加量、搅拌转速、吸附温度以及吸附时间对吸附效果的影响,并通过正交实验探讨了高炉钛渣吸附废润滑油的工艺优化条件,在此基础上进行了高炉钛渣与活性白土吸附废润滑油的对比实验。实验结果表明:高炉钛渣对废润滑油有着较好的吸附效果,且吸附效果与活性白土相当,可作为吸附剂用于废润滑油的吸附再生。 相似文献
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以中钛型含钛高炉渣为主原料制备微晶玻璃,利用渣中的TiO2作晶核剂.采用差示扫描量热法(DSC)、X射线衍射(XRD)和扫描电子显微镜(SEM)等分析技术研究了含钛高炉渣用量的变化对基础玻璃晶化、微晶玻璃性能的影响.结果表明,渣中适量的TiO2对玻璃晶化有较好的促进作用.渣用量较低时制得的微晶玻璃的主晶相为硅灰石,但当渣用量超过70%时,主晶相发生变化,变为钙铝黄长石等长石类矿相.中钛型含钛高炉渣用量为63%左右时,制得的微晶玻璃晶相含量合适,性能最好.此时采用的热处理制度为:核化温度720℃,保温1h,晶化温度945℃,保温2h,制得的微晶玻璃抗弯强度为121.68MPa,显微硬度为7.81 GPa. 相似文献
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由于攀钢高炉渣中含有20%以上的TiO2,使其利用受到很大限制,为使高钛矿渣作为掺合材料应用于混凝土,需首先了解高钛矿渣的粉磨特性。本文中研究了粉磨时间与高钛矿渣细度之间的关系,对比了高钛矿渣与普通矿渣易磨性并分析了助磨剂对高钛矿渣粉磨的影响。结果表明,高钛矿渣的易磨性较普通矿渣差,可使用助磨剂提高高钛矿渣的粉磨效率。 相似文献
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M. Sugiura A. Shinotake M. Nakashima N. Omoto 《International Journal of Thermophysics》2014,35(6-7):1320-1329
As the initial process in an integrated steel-making plant, molten iron is produced in a blast furnace. The molten iron has a temperature between 1700 K and 1900 K. The outflow stream discharged from a taphole comprises the molten iron and slag (which is a mixture of molten oxides). Monitoring of the stream temperature is important because it has information on the thermal condition inside the blast furnace. A newly developed simultaneous measurement technique for temperature and iron–slag ratio is reported. A monochromatic CCD camera with a short exposure time is used to obtain a thermal image of the rapidly moving stream. The thermal image has a marble-like pattern caused by the physical separation of the iron and slag and their different optical properties. Iron thermometry is realized by automatically detecting the peak of the iron gray-level distribution on a histogram. Meanwhile, the thermal radiance of the semitransparent slag varies as a function of the thickness. The slag temperature is calculated from the maximum gray level, presuming that the emissivity of the slag is constant at a thick slag part. The slag ratio is measured by counting the number of pixels on the histogram. A field test was carried out at an operating blast furnace. The iron temperature, slag temperature, and slag ratio were successfully measured. This multiple image measurement is expected to be the new information source for stable blast furnace operation. 相似文献
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《Cement and Concrete Composites》2005,27(6):688-703
A long-term corrosion study was conducted to determine the effectiveness of calcium nitrite, silica fume, fly ash, ground granulated blast furnace slag, and DSS in reducing corrosion of reinforcing steel in concrete. Mixture proportions included single, double, and triple combinations of these admixtures. Non-cracked and pre-cracked slab specimens were evaluated by visual inspections, macrocell readings, half-cell potentials, and autopsies. Triple combinations of calcium nitrite, silica fume, and either fly ash or ground granulated blast furnace slag, as well as a double combination of calcium nitrite and ground granulated blast furnace slag, performed very well and are recommended in concrete mixtures exposed to severe corrosive environments. DSS outperformed the other admixtures for corrosion prevention in this study; however, it resulted in somewhat lower compressive strengths and had not been fully tested for effects on other concrete properties. 相似文献
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Oguz E 《Journal of hazardous materials》2004,114(1-3):131-137
Blast furnace slag was used to remove phosphate from aqueous solutions. The influence of pH, temperature, agitation rate, and blast furnace slag dosage on phosphate removal was investigated by conducting a series of batch adsorption experiments. In addition, the yield and mechanisms of phosphate removal were explained on the basis of the results of X-ray spectroscopy, measurements of zeta potential of particles, specific surface area, and images of scanning electron microscopy (SEM) of the particles before and after adsorption. The specific surface area of the blast furnace slag was 0.4m(2)g(-1). The removal of phosphate predominantly has taken place by a precipitation mechanism and weak physical interactions between the surface of adsorbent and the metallic salts of phosphate. In this study, phosphate removal in excess of 99% was obtained, and it was concluded that blast furnace slag is an efficient adsorbent for the removal of phosphate from solution. 相似文献
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铜尾矿制备无石灰加气混凝土的试验研究 总被引:5,自引:2,他引:3
为了在综合利用固体废弃物的同时减少煅烧石灰所带来的CO2排放,采用铜尾矿-矿渣-水泥熟料-风积砂原料体系制备压加气混凝土,以富钙、镁的铜尾矿和矿渣代替传统加气混凝土所需的石灰.具体研究了各原料组份对加气混凝土物理力学性能的影响,得到B06级铜尾矿加气混凝土的优化配合比为:铜尾矿、矿渣、风积砂、水泥熟料、石膏的质量分数分别为30%、35%、20%、10%、5%.所制备的B06级蒸压加气混凝土的绝干密度为610.2 kg.m-3,抗压强度为4.0 MPa,达到了《蒸压加气混凝土砌块》(GB 11968—2006)规定的A3.5、B06级加气混凝土合格品的要求.物相分析显示,所制备的加气混凝土中主要结晶相是板状的托贝莫来石、硬石膏、残留的石英以及来自原始铜尾矿中的残留矿物. 相似文献
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This paper presents the results of an experimental investigation carried out to study the effect of granulated blast furnace slag and two types of superplasticizers on the properties of self-compacting concrete (SCC). In control SCC, cement was replaced with 10%, 15%, 20%, and 25% of blast furnace slag. Two types of superplasticizers: polycarboxylate based superplasticizer and naphthalene sulphonate based superplasticizers were used. Tests were conducted for slump flow, the modified slump test, V-Funnel, J-Ring, U-Box, and compressive strength. The results showed that polycarboxylate based superplasticizer concrete mixes give more workability and higher compressive strength, at all ages, than those with naphthalene sulphonate based superplasticizer. Inclusion of blast furnace slag by substitution to cement was found to be very beneficial to fresh self-compacting concrete. An improvement of workability was observed up to 20% of slag content with an optimum content of 15%. Workability retention of about 45 min with 15% and 20% of slag content was obtained using a polycarboxylate based superplasticizer; compressive strength decreased with the increase in slag content, as occurs for vibrated concrete, although at later ages the differences were small. 相似文献