白色绢云母珠光颜料制备及表征

用绢云母可制得一种具有良好光学屏蔽性能的新型珠光颜料，市场前景广阔。本文讨论了白色绢云母珠光颜料的制备方法，并重点研究了试验条件对其性能的影响，同时还用XRD、SEM等手段对产品进行了表征。     

有机-无机复合改性绢云母的研究

针对绢云母难以在有机涂料中润湿和分散的缺点,用γ-缩水甘油醚氧基丙基三甲氧基硅烷(KH-550)与铬酸盐对片状绢云母进行了复合改性,并进一步考察了改性绢云母对环氧涂料防腐性能的影响.扫描电镜(SEM)表明:KH-550和铬酸盐对绢云母进行复合改性后,绢云母在涂料中颗粒弥撒分布更加均匀,排布致密,与表面的结合更为密切.同...     

不同无机填料对聚氨酯阻尼材料性能的影响

以聚氧化丙烯二醇（PPG）、二苯基甲烷二异氰酸酯（MDI）、端羟基硅油为原料,1,4丁二醇（BDO）作为扩链剂,采用预聚体法制得无填料填充的聚氨酯、不同质量分数绢云母改性聚氨酯、不同质量分数滑石粉改性聚氨酯的3种复合材料,采用动态力学分析（DMA）、热重分析（TGA）、扫描电子显微镜（SEM）对复合材料的阻尼性能、耐热性能、表面形貌进行表征,并对复合材料的力学性能进行测试。结果表明,添加两种不同无机填料后,复合材料的热稳定性、力学性能以及阻尼性能都有不同程度的改善。添加10%的绢云母和10%的滑石粉后,最大损耗因子（tanδ）分别由0.372提升至0.436和0.440,而T _g向低温方向偏移,10%绢云母改性的复合材料拉伸强度、断裂伸长率、邵氏硬度分别由5.16MPa、432%、65提高到8.47MPa、468%、85;10%滑石粉改性后复合材料的拉伸强度、断裂伸长率、邵氏硬度提高至7MPa、470%、82;在失重率为5%时,相比于未添加无机填料的聚氨酯,10%绢云母和10%滑石粉改性后的初始分解温度分别提高了52.67℃和55.8℃。     

疏水改性填料用于纸张施胶

绢云母和滑石粉均为层状硅酸盐,对疏水有机物具有很强的吸附性.本研究用苯丙胶乳、石蜡对其进行疏水改性后用于纸张施胶.研究结果显示,在常规加填量下,石蜡改性的滑石粉、绢云母能满足纸张的抗水要求,而苯丙胶乳改性的滑石粉、绢云母加填后纸张施胶度很低.滑石粉比绢云母能够吸附更多的石蜡,相应的纸张施胶度更高.绢云母,滑石粉对石蜡的吸附能力随着改性温度、搅拌时间和速度的增加而增加.在不降低纸张施胶度的前提下,石蜡改性滑石粉施胶与分别利用石蜡乳液施胶和滑石粉加填相比,纸张抗张强度明显提高.     

助磨剂对绢云母超细粉碎的影响

研究了 3种助磨剂 (硅酸钠、柠檬酸钠、三聚磷酸钠 )对绢云母超细粉碎助磨效果的影响。其中三聚磷酸钠的效果最好 ,硅酸钠的效果最差 ;同时还发现助磨剂三聚磷酸钠在 0 .2 0 %、且磨矿浓度在 40 %左右时助磨效能最好     

The change of phase composition in kaolinite- and illite-rich clay-based ceramic bodies

Raw material for ceramics consists mainly of kaolinite, illite, quartz and feldspar. Three representative clays, a high kaolinitic (HB), illitic- and quartz-rich (KW) and naturally mixed kaolinite–illite (P1) clays of Westerwald area, were chosen for this study [Kromer, H., 1980. Tertiary clays in the Westerwald area. Geol. Jb. D. Rhei D Hanover, 69–84]. The largest and oldest clay mining area of Germany is in the Westerwald area. These clays were mixed with each other and also with K, and Ca–Na feldspar. The high temperature phases of the mixed bodies were of three groups: crystalline phase, amorphous/glassy phase and porosity.The aim of this study was to determine: (1) the effect of kaolinite–illite–quartz ratios, (2) the effect of heat treatment and (3) the effect of feldspar on the fired mineralogy of the fired products. The crystalline phases are cristobalite, mullite, quartz, hematite and anatase. The bodies consist of crystalline phases such as quartz, mullite and cristobalite in a composite structure where crystals and pores are often embedded in amorphous/glassy phase. The formation of mullite and cristobalite is very distinctive in kaolinitic clay, and the structure is dominated by the spiky primary mullite. In the illite/sericite-rich mixtures, the high K content causes a large amount of melt superimposed on the mullite formation. The cristobalite formation is completely suppressed in illite/sericite-rich bodies. After dehydroxylation, metakaolinite and illite/sericite anhydride structures are formed. The persistence of illite/sericite anhydride peaks above 950 °C in KW clay indicates the presence of sericite/muscovite mineral. The disappearance temperatures and firing behaviour of K and Ca–Na feldspar observed within the XRD patterns of mixed bodies are different. K feldspar lines disappear earlier in HB bodies than in KW bodies, but Ca–Na feldspar shows a reverse behaviour. While Ca–Na feldspar peak intensity gradually decreases but persists at 1150–1250 °C, K feldspar suddenly disappears at 1150 °C.     

选矿尾矿中绢云母的回收工艺及应用研究

介绍了选矿尾矿中绢云母矿物的回收及其在橡胶、塑料、涂料中的应用技术。     

驼路沟钴金矿床地质特征与成因初探

驼路沟钴、金矿位于东昆仑褶皱系昆南断褶带内,产于晚古生代二叠系下统石英片岩中。矿床在区域变质作用的基础上,构造活动继续,现有的裂隙再次开启,后期中低温热液沿着构造薄弱带进一步将钴、金元素活化富集成矿。     

尾矿回收超细绢云母工艺及产品应用研究

从选矿尾矿中回收超细绢云母粉工艺是近几年发展起来的一项资源综合利用新工艺。研究从尾矿的工艺矿物学入手，介绍了尾矿的矿物组成及回收工艺的工作原理，着重探讨了超细绢云母粉在橡胶、塑料、涂料等领域中的应用情况。     

某铅锌矿选矿尾矿综合利用试验研究

针对选矿尾矿的特性，采用高选择性的3ACH捕收剂、F—1抑制剂，回收了绢云母含量分别达96％和64％以上的一、二级绢云母产品。经应用试验表明：绢云母一级品在橡胶中的补强性能基本达到了沉淀法白炭黑水平，二级品也全面超过硅铝炭黑的补强性能。