阿利特高炉矿渣水泥的研究

经过对多种激发剂品种、掺加量、粉磨细度等试验研究，用本试验选定的原料，制备了3d胶砂抗压强度这31．4MPa，28d胶砂抗压强度达47．5MPa的水泥，其矿渣掺加量达到水泥质量的75％，超过了国家标准对矿湘硅酸盐水泥的规定比例，是一种新品种水泥。     

The action of some aggressve solutions on Portland, pozzolanic and blastfurnace slag cement mortars

An account of the results of a systematic investigation on the effects of percolation by solutions of magnesium sulphate and magnesium chloride of the same normality, respectively, through mortar samples manufactured with different types of cement is given by the Authors. The aim of the investigation is the comparative evaluation of the behaviour of the single cements under the attack from the two aggressive solutions, as well as the search for possible relationships between the manifold factors responsible, to a different extent, for the lowering of the mechanical strength of the resultant mortars.     

电解锰渣用于水泥缓凝剂的生产研究

对废锰渣用于水泥缓凝剂进行了理论分析,试验研究了废锰渣替代石膏作水泥缓凝剂的可行性。结果表明:锰渣部分替代石膏作水泥缓凝剂其凝结时间、安定性、放射性检验均符合国家标准要求;锰渣与石膏掺量总和在6%~7%(质量分数,锰渣掺量不超过5%)比较适宜,实际生产中当锰渣以3%(质量分数)掺入时,可达到较好的使用效果。     

脱硫石膏的热处理及其对矿渣水泥若干性能的影响

研究了在不同温度下处理的脱硫石膏对矿渣水泥若干性能的影响，确定其在水泥基材料中循环利用的可行性。研究结果表明，经低温烘干焙烧处理的脱硫石膏，掺入到矿渣水泥中并控制适当的SO3掺量，水泥凝结时间正常，强度略有提高，并且明显降低了硬化水泥浆体的失水率和干缩率，可以有效防止收缩裂缝的产生：并进一步探讨了脱硫石膏对矿渣水泥性能的影响机理。     

Compressive strength and hydration of wastepaper sludge ash-ground granulated blastfurnace slag blended pastes

Compressive strength and hydration characteristics of wastepaper sludge ash-ground granulated blastfurnace slag (WSA-GGBS) blended pastes were investigated at a water to binder (w/b) ratio of 0.5. The strength results are compared to those of normal Portland cement (PC) paste and relative strengths are reported. Early relative strengths (1 day) of WSA-GGBS pastes were very low but a marked gain in relative strength occurred between 1 and 7 days and this increased further after 28 and 90 days. For the 50% WSA-50% GGBS blended paste, the strength achieved at 90 days was nearly 50% of that of the PC control paste. Transmission electron microscopy (TEM), X-ray diffraction (XRD) and thermogravimetric (TG) analysis were carried out to identify the mineral components in the WSA and the hydration products of WSA and WSA-GGBS pastes. The principal crystalline components in the WSA are gehlenite, calcium oxide, bredigite and α′-C₂S (stabilised with Al and Mg) together with small amounts of anorthite and calcium carbonate and traces of calcium hydroxide and quartz. The α′-C₂S and bredigite, which phase separate from liquid phase that forms a glass on cooling, are difficult to distinguish by XRD. The hydration products identified in WSA paste are CH, C₄AH₁₃, C₃A.0.5CC?.0.5CH.H_11.5 and C-S-H gel plus possible evidence of small amounts of C₂ASH₈ and C₃A.3CS?.H₃₂. Based upon the findings, a hydration mechanism is presented, and a model is proposed to explain the observed strength development.     

提高矿渣水泥中矿渣掺量的试验研究

大幅度提高水泥中矿渣掺量、相应降低水泥熟料含量，必然引起水泥性能的变化。本研究采用适当的技术措施提高矿渣水泥中矿渣掺量，改善水泥的早期性能，提出了#425矿渣水泥的合理配比，采用了XRD、SEM、DTA等测试技术分析了该种水泥的水化产物及其水化机理。采用的技术措施简单，利于生产控制，生产的水泥性能稳定、成本低、能耗少。     

“电石渣-石膏”法烟气脱硫工艺及脱硫石膏的综合利用

结合新疆天业（集团）有限公司4×135MW机组烟气脱硫工程的实施情况,介绍了“电石渣-石膏”法烟气脱硫工艺的特点,并指出了脱硫石膏的综合利用途径。     

电石渣在石膏法烟气脱硫中的应用

介绍了利用电石渣作为脱硫剂在烟气脱硫中的应用情况,节能降耗效果显著。     

脱硫石膏代替天然石膏作水泥缓凝剂

脱硫石膏是火力发电厂烟气脱硫时由SO2和CaCO3反应生成的一种工业副产石膏,主要成分为CaSO4·2H2O,还含有一些杂质.脱硫石膏如不加以利用,不但需要资金和土地建造堆场,而且还污染环境.使用脱硫石膏作水泥缓凝剂是非常有效的将废物资源化的途径,可以创造良好的经济、社会和环境效益.本文对此进行了研究.     

电石渣制水泥的可行性研究

从市场、工艺、原料、投资回收等方面对电石渣制水泥项目的可行性进行了探讨,认为用电石渣制水泥具有技术成熟、经济可行等优点。建议电石法PVC生产厂在条件成熟时尽快实施这一项目。     

脱硫石膏代替天然石膏在水泥生产中的应用

<正>天然石膏是目前水泥行业使用最广泛的缓凝剂原材料,但由于天然石膏为不可再生资源,随着我国水泥工业的不断发展、水泥产量的不断增加,优质的天然石膏资源日益匮乏,价格也是逐年升高。我公司也同样遇到了天然石膏的资源问题以及价格成本     

超细矿渣在水泥和混凝土中的应用

1 概述 粒化高炉矿渣是冶炼行业的副产品,因其独特的冷却方式而使其玻璃体结构内含有较高的能量,有潜在的水硬性,是水泥和混凝土的优质混合材。随着我国粉磨技术向超细领域的发展,超细矿渣在水泥和混凝土中的作用愈来愈受到用户的青睐。自80年代以来,英、美、加、日、法、奥等国相继制定了国家标准,使超细矿渣的应用得到了令人瞩目的发展。但要使其潜在的活性发挥出来,必须将其粉磨到勃氏比表面积在5000～6000cm~2/g左右。当粒化高炉矿渣得到超细粉磨后,由于其玻璃体结构的     

High-alumina cement production from FeNi-ERF slag, limestone and diasporic bauxite

In this paper the utilization of ferronickel electroreduction furnace (FeNi-ERF) slag for the production of high-alumina cement (HAC) is investigated through laboratory and pilot-scale tests. The process followed consisted of smelting reduction of slag mixtures with low-grade diasporic bauxite and limestone. In the laboratory-scale trials the main process parameters were defined, concerning raw material proportions, kinetics of the reductions and cooling rate of the product. The presence of a carbon-containing iron bath enhances FeO_x reduction from the slag. Products from laboratory tests developed satisfactory compressive strengths relative to those of commercial HAC. According to the results of the laboratory tests, pilot-scale heat treatments were carried out in a 5-t electric arc furnace (EAF) and about 4 t of final mixture were produced.     

利用硅锰渣和锡渣烧制硅酸盐水泥熟料

0 引言 在立窑水泥生产中,金属尾矿和工业废渣单掺或复掺配料生产硅酸盐水泥熟料已经得到广泛应用,例如铅锌尾矿、锡渣、铜渣等, 但是用硅锰渣配料生产水泥熟料还未见报道.广西某厂附近有冶炼硅锰合金和金属锡的厂家,每年排放数万吨废渣.笔者在该厂进行技术服务期间,利用硅锰渣和锡渣双掺配料,在该厂Φ3m×11m盘塔式机立窑上生产出了早期强度高的熟料,取得了显著的效果.     

高标号钢渣矿渣水泥试验研究

实验结果表明,使用外加剂N(或M)可以大幅度提高钢渣矿渣水泥的强度,3d抗压强度可增加5.0MPa, 28 d抗压强度可提高7.0 MPa,同时,硬石膏或烧石膏在促进水泥水化硬化方面要优于二水石膏。并且在钢渣 矿渣总量达70%的情况下,成功制备出42.5等级的优质水泥。     

磷石膏制水泥缓凝剂及建筑石膏粉的工艺特点

为解决硫酸法萃取磷酸生产的副产品磷石膏大量堆存所带来的一系列问题 ,探讨磷石膏综合利用途径 ,重点介绍铜陵化工研究院磷石膏制水泥缓凝剂 (10 0 kt/ a)及建筑石膏粉的工艺原理、流程、工艺特点、主要消耗指标及投资 ,在水泥生产企业比较集中而天然石膏馈乏的地区 ,建成水泥缓凝剂生产线是磷石膏的最佳出路     

利用电炉钢渣作为砌筑水泥原料的试验研究

文章对利用电炉钢渣生产砌筑水泥进行了初步的研究。采用抗压、抗折强度试验、标准稠度用水量、凝结时间试验、水化放热测定、XRD和SEM分析等试验方法，研究了几种缓凝剂对还原渣的缓凝效果，分析了各组分掺入量对砌筑水泥的凝结时间和强度的影响，确定了砌筑水泥的组成。试验结果表明，氧化钢渣本身活性较低，可作为非活性混合材使用；还原渣的水化活性较高，可作为活性混合材使用。经合理设计砌筑水泥各组分的比例，所获得的砌筑水泥可达到GB／T3183-1997所规定的各项技术指标要求。     

Portland cement clinker, granulated slag and by-pass cement dust composites

Three blends of slag cement were prepared, namely 70/30, 50/50 and 30/70 mass% of Portland cement clinker and granulated slag, respectively. Each blend was mixed with 2.5, 5.0, 7.5 and 10.0 mass% by-pass cement dust. The physical properties of cement pastes were studied, including setting times, electrical conductivity and fluidity. The results indicated that the rheological properties of Portland cement clinker were enhanced by partial replacement by granulated slag. By-pass cement dust affects the rheological properties of Portland cement clinker/granulated slag composites and depends on its amount as well as mix composition. The increase in the amount of by-pass cement dust increases the required water of normal consistency. The setting time of Portland slag cement paste was extended with the increase in slag content. The addition of 2.5 mass% by-pass cement dust to M.1 (70 mass% Portland cement clinker/30 mass% granulated slag) and M.2 (50 mass% Portland cement clinker/50 mass% granulated slag) retards the initial and final setting time, whereas it accelerates the final setting time of M.3 (30 mass% Portland cement clinker/70 mass% granulated slag). The presence of by-pass cement dust affects the location and height of the conductivity peaks. By increasing the by-pass cement dust from 2.5 to 7.5 mass%, the conductivity maximum increases. With further addition (10.0 mass%), the height of the conductivity maximum decreases.     

矿渣-钢渣复合水泥的性能研究

试验利用矿渣和钢渣作为配制复合水泥的辅助性胶凝材料,研究了矿渣、钢渣细度和复合比例对复合水泥强度的影响,并从颗粒堆积和复合胶凝效应的角度探讨了矿渣-钢渣在复合水泥中的作用机理。试验结果表明：在矿渣与钢渣组成的复合体系中,矿渣细度决定了复合水泥的强度,矿渣越细,复合水泥强度越高;在辅助性胶凝材料掺量一定的情况下,矿渣占的比例越高,复合水泥的强度越高;在适宜的复合比例下,用矿渣和钢渣混合配制的复合水泥28d抗压强度高于纯水泥的28d抗压强度。