含钛高炉渣钛组分富集-分选试验研究

对攀钢集团有限公司含钛高炉水淬渣进行定向富集,并对富集渣进行浮选研究。结果表明,在焙烧温度为1 250℃、碱度R=3.0、渣中CaF2加入量为6%、焙烧时间为4 h及冷却速率为10℃/min的条件下,钙钛矿的晶粒可长大到40μm左右;在羟肟酸用量为12 kg/t,pH值为9,起泡剂为2#油的条件下进行浮选,精矿中TiO2品位可达到50%左右,TiO2回收率约为35%;尾矿中TiO2品位在10%左右。     

水淬高炉矿渣超细粉的应用与制备

系统介绍炼铁高炉水淬矿渣的性能、矿渣微粉在水泥和混凝土中的应用及矿渣微粉制备的设备和工艺流程，为冶金企业水淬高炉矿渣的深层次开发利用提供重要参考。     

含钛高炉渣综合利用研究的进展

简述了综合利用含钛高炉渣的意义，概述了国内外研究取得的成果，讨论了存在的问题．详细地介绍了选择性析出理论和综合利用含钛高炉渣研究的新进展，认为采用选择性析出技术是解决高炉渣综合利用的有效途径。     

掺加矿渣的土壤聚合物对重金属的固化

在土壤聚合物固化重金属时进行了掺加不同量高炉矿渣的实验，测定固化体的抗压强度、浸出毒性．试验结果表明，土壤聚合物掺加一定量的高炉矿渣固化重金属对不同的重金属固化效果不同，但总体来说，固化体的浸出毒性低于国家标准，抗压强度可迭30MPa以上，能用于建材．高炉矿渣的掺量在30％左右时抗压强度最好，浸出毒性则随着高炉矿渣掺量的增加而下降，所以利用土壤聚合物固化一定含量的重金属时，可以加入适当的高炉矿渣来减小浸出毒性．     

A Blended Cement Containing Blast Furnace Slag and Phosphorous Slag

Blended cement comaining blast furnace slag( BFS ) and phosphorous slag( PS) is a new kind of cement. The total content of blended materials could increase if two additives were used. Using the same admixtures , the properties of the blended cement with 70% additives could reach the standard of 525-grade slag cement according to GB. The strength of cement with 80% additives could reach the standard of 425-grade slag cement. The tests of strength, pore structure, hydration products, inhibiting alkali-aggregate reaction, resistance to sulfate corrosion of BFS-PSC were performed.     

由含钛高炉渣合成复合肥初探

以含钛高炉渣作为主要原料,采用加热法制备复合肥,以提高其溶解性能,使其中的营养元素转化为易被植物吸收利用的形式．考察了工艺条件对肥料溶解性能的影响．结果表明,合成复合肥的适宜工艺条件为：硫酸铵与含钛高炉渣的质量比为8：1,加热温度为300℃,恒温时间为30min．复合肥中含有氮、硅、硫、钙、镁、铁和钛等营养元素,其中氮、硫、镁、铁和钛以水溶性物质的形式存在;硅和钙以枸溶性物质的形式存在,均可被植物有效利用．     

含钛高炉渣制备无机高分子复合絮凝剂及其性能研究

用盐酸溶解含钛高炉渣,将溶出液与聚硅酸按不同配比复合预聚,制得无机高分子复合絮凝剂MSF,对MSF的形貌和红外光谱进行分析：采用MSF处理模拟江水,对所形成絮体的粒径分布以及MSF的絮凝效果进行比较,并研究不同原水水质和pH值对MSF絮凝效果的影响。结果表明,按n（M）：”（Si）为1：2的配比所制MSF呈现为有较高伸展度、较粗枝杈的长链分枝形貌,形成的絮体粒径最大,对模拟江水的絮凝效果最好;在pH值为1．5-12．5时,絮体表面均呈现很强的正电性;MSF对原水水质和pH值的变化有较强的适应性。     

粒化高炉矿渣代砂混凝土性能的试验研究

试验利用粒化高炉矿渣取代部分砂(特细砂)作为细骨料拌制混凝土,以不同的矿渣代砂率为主要变量,对10组不同配合比混凝土的流动性,立方体抗压强度进行研究。试验结果表明,混凝土的流动性随矿渣代砂率的增加逐渐降低,混凝土立方体抗压强度随矿渣代砂率的增加先增大后减小,矿渣的最优代砂率为60%;矿渣细骨料对混凝土后期强度的增长有促进作用。同时拟合出适合于矿渣代砂混凝土抗压强度的预测模型。     

Effect of phase separation structure on cementitious reactivity of blast furnace slag

Blast furnace slag samples with phase separation structure were prepared by re-melting and then water quenching process. By use of XRD, DTA and SEM technologies in combination with mechanical property experiment, the structure characteristics of samples were determined and their effects on cementitious reactivity were investigated. The results show that the samples with phase separation have better cementitious reactivity than sample with homogenous glass and sample with crystalline phases, which mainly contributes to its glass structure with coexistence of Ca-O rich phase and Si-O rich phase. Moreover, the amorphous samples possess hydrability which is affected by their formation process, since phase separation extends the range of possible Ca-rich crystalline phases. Supported by the National Natural Science Foundation of China (Grant No. 50674062) and the Postdoctoral Science Foundation of China (Grant No. 20070420354)     

高炉渣酸溶物基水热合成光催化剂的研究

以冶金高炉渣酸溶物为原料,采用水热法合成制备光催化剂,利用傅里叶变换红外光谱（FTIR）和扫描电镜（SEM）对光催化剂的化学组分、比表面积等物性进行表征,并研究了水热反应过程中pH值、反应温度和反应时间对高炉渣酸溶物制光催化剂催化活性的影响。结果表明,所制光催化剂是一种比表面积较大的多孔材料,且具有良好的光催化活性;光催化氧化浓度为2 5 mg/L的甲基橙溶液陈化0.5 h后,其脱色率达到98.9%。     

Effect of cooling rate on the crystallization behavior of perovskite in high titanium-bearing blast furnace slag

The effect of cooling rate on the crystallization of perovskite in high Ti-bearing blast furnace（BF） slag was studied using confocal scanning laser microscopy（CSLM）. Results showed that perovskite was the primary phase formed during the cooling of slag. On the slag surface, the growth of perovskite proceeded via the successive production of quasi-particles along straight lines, which further extended in certain directions. The morphology and structure of perovskite was found to vary as a function of cooling rate. At cooling rates of 10 and 30 K/min, the dendritic arms of perovskite crossed obliquely, while they were orthogonal at a cooling rate of 20 K/min and hexagonal at cooling rates of 40 and 50 K/min. These three crystal morphologies thus obtained at different cooling rates respectively corresponded to the orthorhombic, cubic and hexagonal crystal structures of perovskite. The observed change in the structure of perovskite could probably be attributed to the deficiency of O^2-, when Ti2O3 was involved in the formation of perovskite.     

高炉水渣用于无土栽培基质的可行性

进行了高炉水渣用于无土栽培基质的物理化学性质测定和番茄、花卉无土栽培实验。结果显示,高炉水渣的各项物理化学性质能够满足作为无土栽培基质的要求。用高炉水渣与草炭制成的混合基质,栽培的番茄植株长势良好,果实整齐肥大,色泽鲜艳,结果优于纯草炭（CK）;高炉水渣与苹炭体积比为1：1时,栽培的各种观赏性花卉长势良好。     

含钛渣短流程直接制备钛及其合金

利用固体透氧膜（SOM ）法直接由含钛渣还原制备金属钛及其合金。将粉态含钛渣压片制成阴极,以YSZ管内碳粉饱和的铜液为阳极,以1100℃电解温度、3．5 V槽电压在CaCl2熔盐中电解,研究成型压力及电解时间对电解产物的影响,分析电解过程中的杂质行为。结果表明,随电解时间的延长,电解产物中的钛、铁含量不断增大,产物颗粒形貌趋于匀细疏松;对于铁钛渣,电解6h可获得钛铁合金;对于高钛渣,成型压力为3MPa时,电解4h可除去氧,电解6h可获得纯金属钛;较小成型压力下的多孔阴极有利于杂质元素的去除。     

碳氮化含钛高炉渣对铁沟捣打料抗氧化性及抗渣性的影响

测定碳氮化处理后含钛高炉渣的熔化特性,并研究在高炉铁沟捣打料中加入碳氮化含钛高炉渣后对材料抗氧化性及抗渣性的影响。结果表明,含钛高炉渣经碳氮化处理后,渣中主要的矿物相为氮化钛或碳氮化钛和钙镁黄长石或钙铝黄长石,渣中相的组成和含量受还原温度影响较大,随着渣的还原温度升高,还原渣的熔点呈上升趋势;将还原渣引入到高炉铁沟捣打料中,部分或完全替代碳化硅原料,可明显提高捣打料的抗氧化性,最佳的渣加入量为7%,过多将会导致捣打料抗氧化性减弱;因Ti（C,N）具有优良的抗渣性能,碳氮化含钛高炉渣的引入不影响高炉铁沟捣打料的抗渣性。     

提高包钢高炉渣排碱能力的试验研究

配制了变碱度、变SiO2、变MgO系列合成渣试样,在1450℃高温下,测定了碱金属在炉渣中达到饱和时的质量分数。结果表明,降低碱度,增加渣中自由SiO2质量分数,增加渣中MgO的质量分数,均可提高炉渣的排碱能力。     

转炉钢渣对矿渣-硅酸盐水泥混合胶砂的收缩补偿效应

大掺量矿渣混凝土比硅酸盐水泥混凝土表现出更大的收缩,影响混凝土的耐久性.研究了转炉钢渣粉对矿渣粉-硅酸盐水泥混合胶砂硬化体收缩特性的影响.研究表明:转炉钢渣粉部分替代矿渣粉,可显著降低矿渣粉-水泥混合胶砂的收缩.钢矿复合掺合料中钢渣的掺量越高,掺合料对硅酸盐水泥的替代比例越高,收缩补偿效果愈好.当掺合料对水泥的替代比例为70%、掺合料中钢渣粉(比表面积576 m2/kg)掺量分别为20%和40%时,所制备胶砂的4 d和80 d干缩值比矿渣粉(比表面积565 m2.kg-1)-硅酸盐水泥混合胶砂分别降低18.9%,12.8%和36.5%,33.4%.     

Effect of crushed air-cooled blast furnace slag on mechanical properties of concrete

Morphology characteristics of mix aggregates with crushed air-cooled blast furnace slag(SCR) and crushed limestone(LCR) with 5-20 mm and 20-40 mm gradation were represented by numerical parameters including angularity number(AN) and index of aggregate particle shape and texture(IAPST).The effect of mix aggregates containing SCR on compressive strength and splitting tensile strength of concrete was investigated.Fracture characteristics of concrete,interfacial structure between aggregates and matrix were analyzed.The experimental results show that porous and rough SCR increases contact area with matrix in concrete,concave holes and micro-pores on the surface of SCR are filled by mortar and hydrated cement paste,which may increase interlocking and mechanical bond between aggregate and matrix in concrete.SCR can be used to produce a high-strength concrete with better mechanical properties than corresponding concrete made with LCR.The increase of AN and IAPST of aggregate may enhance mechanical properties of concrete.     

硫掺杂含钛高炉渣光催化剂性能研究

以含钛高炉渣为原料,硫脲为掺杂剂,采用高能球磨法制备了S掺杂含钛高炉渣催化剂,通过XRD、UV—vis吸收光谱、SEM等对其进行表征．研究甲基橙溶液pH值等对可见光光催化降解甲基橙的影响．结果表明,经过焙烧的掺硫催化剂对可见光吸收增强,吸收带边明显“红移”;当pH=2时,甲基橙氧化效果最好．     

包钢高炉渣改良回填料抗剪强度试验研究

包钢高炉渣的放射性、稳定性等均满足规范要求,可以用于建筑地基填料、道路基层材料.通过室内试验发现,原矿渣级配不良,缺少细料的填充,不能直接用于地基填料,向高炉渣中添加不同比例的粉煤灰和砂土,进行级配改良.对改良后的混合料进行了大型直剪试验,研究P5含量与粘聚力及内摩擦角的变化规律.主要结论包括：P5含量在60％～75％之间时,填料的抗剪强度最大;添加砂土的填料级配优于只添加粉煤灰的,且P5为68％时密实度最好、抗剪强度最大;P5 =65％ ～70％之间的砂土填料配比最优.     

F,MgO对包钢高炉渣性能影响的实验研究

根据目前包钢高炉渣的成分采用二次回归方法配制合成渣,通过对合成渣的粘度、熔化性温度及熔化区间的测定,研究F和MgO对包钢高炉渣性能的影响程度,寻求适宜的高炉渣成分.实验结果表明,当炉渣中w(F)≤1%时,CaF2具有降低炉渣开始熔化温度,增加炉渣熔化区间,降低炉渣热焓,降低炉渣粘度和炉渣熔化性温度的作用.随着炉渣中MgO的质量分数的增加,炉渣的热稳定性提高,炉渣粘度降低,当w(MgO)=11.652%时,熔化性温度达到最高值.