采用黄磷渣与高炉矿渣作原材料对熟料强度的影响

为降低生料成本。提高生料易烧性，2006年5～8月份，我厂用黄磷渣作为硅、铝质原材料进行试生产。经过5、6两个月的立窑煅烧试验发现：黄磷渣作为硅质、钙质原料使用时，效果良好。当黄磷渣的掺量为5．5％时，效果最佳。从7月份起，我们便将生料中黄磷渣的掺量固定为5．5％。9月份开始，由于我厂附近生产黄磷的企业停产，黄磷渣短缺，我们不得不停用。     

缓冷酸性高炉矿渣在水泥生产中的应用

0 引言 目前,我国高炉矿渣年产量在8000万吨左右,其中95％以上经过水淬等成粒方法制成粒化高炉矿渣,广泛用于水泥生产,主要用来作水泥混合材。 众所周知:任何处在熔融状态的物质通过急冷,都可以成为玻璃体,尤其象矿渣这种硅铝酸盐人造矿物,其中硅—氧、铝—氧化学键键力大且粘     

应用XRD分析水泥窑灰矿渣型生态水泥水化过程的研究

选用4种不同类型的水泥窑灰（CKD），利用XRF分析其化学成分，并将其分别与粒化高炉矿渣粉（GBFS）制成4种生态水泥。然后根据CKD-GBFS生态水泥净浆的水化产物的XRD图谱与各龄期的胶砂抗压强度研究其水化过程。结果表明：高碱度的CKD能促进水化，适量的fCaO能加快后期水化，而未反应的Ca（OH）2会降低后期抗压强度，K2Ca（SO4）2的产生会延缓水化进程。     

水泥窑灰矿渣型生态水泥水化过程的研究

选用四种不同类型的水泥窑灰（CKD）利用XRF分析了它们的化学成分，并将它们分别与粒化高炉矿渣粉（GBFs）制成四种生态水泥。然后根据CKD-GBFS生态水泥净浆的水化产物的XRD图谱与各龄期的胶砂抗压强度研究CKD-GBFS生态水泥的水化过程。结果表明：高碱度的CKD能促进水化，适量的fCaO能加快后期水化，而未反应的Ca（OH）2会降低后期抗压强度，K2Ca（SO4）2的产生会延缓水化进程。     

用粒化高炉矿渣代替晶种熟料的尝试

用粒化高炉矿渣代替晶种熟料的尝试黄朝聪广西罗城矿务局水泥厂（５４６４０２）我厂为年产设计能力２４万ｔ的立窑水泥厂，有３条Φ３ｍ×１０ｍ立窑生产线。自从１９９５年７月份开始使用粒化高炉矿渣代替熟料晶种配料以来，产、质量有所提高，月产熟料达２万ｔ。水泥强...     

粒化高炉矿渣的微观结构和物相分析

以梅山矿渣为研究载体,运用现代分析手段,研究了粒化高炉矿渣玻璃体的矿物组成和微观结构。研究结果表明:梅山矿渣玻璃体中潜在矿相为钙铝黄长石、少量的镁蔷薇辉石,不存在通常认为的β-C2S;玻璃体中的硅铝骨架并不是处于网状结构中,而是处于双四面体岛状结构中;核磁分析证实梅山矿渣中29Si处于Q1的环境中;该矿渣玻璃体中铝的配位数是4。     

对"现代立窑"和"新型干法窑"称谓的再商榷

2002年7月25日,《中国建材报》曾刊登拙文《对“新型干法窑”和“现代立窑”称谓的商榷》。之后笔者收到许多信息反馈,表示赞同和支持。但受各种复杂因素的影响,还有一些同仁至今仍持某些不同想法和做法,笔者基本赞同“现代立窑”的实际内容,仅对其称谓有所异议,愿坦诚地和诸位再商榷。     

粒化高炉矿渣微粉的生产和应用

1 粒化高炉矿渣的利用众所周知粒化高炉矿渣（以下简称矿渣）是高炉炼铁的副产品,经水淬急冷处理,其颜色呈白色、浅灰色或黑色等。我国水泥行业近50年来一直用其作混合材,生产多品种硅酸盐水泥。尤其是矿渣硅酸盐水泥（以下简称矿渣水泥）,其矿渣掺量可达20％～70％。但至今,全国每年仍有几千万吨矿渣处于低效利用状况,其原因主要有以下几方面。1.1关于矿渣质量的评价水泥厂通常根据矿渣的颜色,凭经验判别其易磨程度,且仅对矿渣进行化学全分析,根据GB/T203-94计算其质量系数M作等级判别依据（M=     

污泥灰替代粘土制备水泥熟料的试验研究

在率值不变(IM ＝1.31,SM＝2.62,KH＝0.89)的前提下,用污泥灰替代(替代量0wt%、25wt%、50wt%、75wt%和100wt%)粘土煅烧水泥熟料.研究了水泥生料易烧性的变化;通过分析水泥熟料XRD图谱和NMR图谱;研究了水泥熟料矿相组成和含量变化;借助SEM,研究了污泥灰对水泥熟料微观结构的影响.研究表明,污泥灰的掺加不仅不会改变生料的率值,而且会降低水泥生料的易烧性,增大水泥熟料中C2S的含量,降低了C3S含量,说明污泥灰可以替代粘土用作水泥原料.     

Hydration and properties of novel blended cements based on cement kiln dust and blast furnace slag

The aim of the present paper is to address the key technical issues pertaining to the utilization of cement kiln dust (CKD) as an activator for ground granulated blast furnace slag (GGBFS) to create nonconventional cementitious binders for concrete. The relatively high alkaline content of CKD is the predominant factor preventing its recycling in cement manufacture. However, it was observed that depending on the water-soluble alkali and sulfate compounds, CKD could provide the environment necessary to activate latent hydraulic materials such as GGBFS. Binary blends containing slag and CKDs from different sources were characterized and compared in terms of the rates of heat evolution and strength development, hydration products, and time of initial setting. A study of the effects of the influencing factors in terms of soluble alkali content, particle size, and free lime content was undertaken. The results confirm the dependence of the dissolution rate of slag on the alkalinity of the reacting system, and the importance of the optimum lime content on the rate of strength gain.     

立窑水泥与回转窑水泥配制混凝土耐久性能的研究

用立窑和回转窑生产的５２５号Ⅱ型硅酸盐水泥配制Ｃ３０混凝土来对比它们的耐久性能。实验结果表明：优质立窑水泥配制混凝土的抗渗性、抗碳化和抗海水腐蚀性能不如回转窑水泥,而抗冻性、收缩性、钢筋锈蚀性能与回转窑水泥相近。此外,４２５号普通硅酸盐水泥中混合材的品种、质量对混凝土耐久性能影响很大,石灰石作混合材可显著改善立窑水泥配制的混凝土的耐久性能,而烧粘土作混合材则严重损害混凝土的耐久性。     

钢渣对水泥生料易烧性的影响

针对高Alite熟料矿物体系,采用不同矿物组成的3种钢渣作为铁质原料进行实验室研究,通过化学分析、X射线衍射和岩相分析等手段对原料和熟料进行测试,分析了不同钢渣的矿物组成及对易烧性的影响规律.分析结果表明：钢渣的主要矿物组成因碱度不同而变化,不同种类的钢渣因其矿物组成不同对生料的易烧性影响也不同.从实验室初步研究结果来看,碱度较高并且微量组分较多的钢渣对生料易烧性影响效果较好.在实验室研究成果的基础上,采用钢渣作为铁质原料进行了工业化试验,生产出了fCaO平均含量＜1%、C3S含量＞60%的优质熟料.     

立窑利用磷渣配料生产道路水泥

利用磷渣配料煅烧道路水泥熟料,采取严格控制石膏和混合材的掺量,并控制水泥的粉磨细度等技术措施,立窑生产的道路水泥,具有抗折抗压强度高、耐磨、收缩小等特点,其各项性能指标完全能达到GB13693－92国家标准要求。     

用电石渣生产水泥的立窑窑灰回收利用技术

将用电石渣生产水泥的立窑窑灰,采用预加水成球工艺成球后与生料和一起入窑煅烧,提高了熟料质量、改善了操作环境,降低了生产成本。     

Mechanism of stabilization of Na-montmorillonite clay with cement kiln dust

A study of the physicochemical interaction of a high free lime (CaO) content cement kiln dust (CKD) with expansive Na-montmorillonite clay is presented. Moist compacted specimens of the CKD-treated clay, the clay alone, the CKD alone, and (for comparison) the clay treated with 7% CaO were each cured for periods up to 90 days and examined by XRD, TGA, and SEM techniques. The results for the CKD-treated clay indicated that calcium hydroxide, derived from the CaO present in the CKD, was extensively adsorbed on the surfaces of the clay flakes, but apparently only limited pozzolanic reaction occurred. Gypsum was rapidly produced from sulfate-bearing components in the CKD, and subsequently ettringite was produced as well, some of the latter apparently incorporating aluminum derived from the clay. Much of the clay was left unreacted, but the morphology of the clay particle assemblage was significantly modified in response to the CKD treatment. Similar morphological changes were also induced by the CaO treatment, suggesting that similar underlying mechanisms were also active here.     

立窑水泥与回转窑水泥对混凝土减水剂适应性的研究

研究了立窑水泥和回转水泥与混凝土减水剂的相容性。实验结果表明,与回转窑水泥相比,优质立窑水泥配制混凝土的减水率与回转窑水泥相近,但凝结时间大幅度延长。适当细磨可以缩短含氟立窑水泥配制混凝土的凝结时间,但无法消除立窑水泥配制混凝土凝结时间偏长的缺点。     

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.     

关于水泥立窑烟气除尘问题的研讨

本文分析了水泥立窑烟气的特性和我国现有各种除尘设备存在的问题，提出应大力开展水除尘方法的研究。介绍了常用两种水除尘器除尘效率的理论计算公式，可作为研究、设计时的参考。     

水泥窑协同处置填埋场陈腐垃圾技术研究

本文介绍了水泥窑协同处置填埋场陈腐垃圾的工程实例,选择某填埋场8年以上填埋龄的陈腐垃圾为研究对象,经精细化作业挖掘后,利用“某水泥窑无害化协同处置450 t/d生活垃圾示范线项目”进行预处理和水泥窑协同处置。由于陈腐垃圾不可燃物比例高、含水率低、有机质含量低、化学成分不同等特征,利用水泥窑协同处置陈腐垃圾时,需要对生料配比进行必要的调整和配合。通过对比水泥窑的窑磨系统操作参数,提出陈腐垃圾的处置不会对水泥窑运行产生不利影响,且处置陈腐垃圾后的熟料强度均能满足要求。本工程实例为水泥窑协同处置陈腐垃圾技术推广提供借鉴和参考,为实现老垃圾填埋场的土地再利用或库容释放,以满足填埋场重复填埋使用提供技术指导。