共查询到19条相似文献,搜索用时 125 毫秒
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硅灰石的表面改性与特性研究 总被引:2,自引:0,他引:2
利用湖北某矿生产的硅灰石粉,探讨了以兼价的表面活性剂AS对硅灰石进行表面改性的条件流程,改性后的硅灰石转变为生硅灰石,并对其特性进行了研究,已用于管带橡胶,PVC电缆填料和涂料颜料的试验。 相似文献
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机械力化学改性硅灰石机理研究 总被引:7,自引:0,他引:7
天然硅灰石矿物具有特殊的针状结构,白色,无毒,是橡胶、塑料的理想填料。添加硅灰石填料,可降低橡胶制品的生产成本,提高橡胶的力学性能,赋以橡胶自身所没有的特殊功能。其作用大小取决于硅灰石/橡胶界面的结合状态。硅灰石系亲水性矿物,与橡胶相容性差。界面能否形成良好的粘结,硅灰石矿物表面性能是关键。经超细粉碎、表面改性可以提高硅灰石表面活性,增强与橡胶的粘结强度。但是,当硅灰石经超细粉碎,粒度为微米级或纳米级,粉体容重为0-15gcm3,以表面化学改性方法加入偶联剂,经高温高速搅拌,不但破坏硅灰石的长… 相似文献
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福建硬质绢云母表面化学改性的研究 总被引:2,自引:1,他引:2
采用超细粉碎和表面化学改性方法对硬质绢云母进行改性,研究表面改性的机理,建立了一整套的改性工艺,制备出应用性能和价值得到较大提高的改性硬质绢云母超细粉。 相似文献
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硅灰石表面改性实验研究 总被引:18,自引:0,他引:18
实验以湖北大冶硅灰石为原料,初步探讨了硅灰石表达改性的工艺条件。经沉降体积法、表面接触角、红外光谱等方法检测和填充橡胶试验证实,硅灰石得到了改性且其填充性能有明显的提高。 相似文献
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选用气流磨超音速气流作为机械力,对硅灰石、硬脂酸进行超细粉碎-表面改性。应用透射电子显微镜分析、观察硅石灰/硬脂酸复合粉体界面微观形貌及成分(Ca、Si、C)的变化规律。TEM能谱分析结果表明:从硅灰石到硬脂酸,Ca、Si含量逐渐降低,C含量则逐渐升高。 相似文献
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对广西平乐硅灰石矿的化学成分和矿物组成进行了分析确定,对硅灰石及其伴生矿物的结构构造特征进行了查定,主要对硅灰石中碳质物的赋存特征进行了研究,发现硅灰石矿石中的碳质物分别与硅灰石、方解石、石英等多种矿物以多种形式紧密伴生,认为要提高平乐硅灰石粉的白度,除了要尽可能除去透辉石、石榴石等矿物杂质及含铁、锰等的氧化物杂质外,关键还要使碳质物单体解离,并除去碳质物杂质。 相似文献
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测定硅灰石制得多孔SiO2粉体粒径的分散剂选择研究 总被引:1,自引:0,他引:1
考察了几种不同类型表面活性剂对一种气相白炭黑的分散效果。经比较研究发现:吐湿-80和六偏磷酸钠的分散效果较类似且较好,对此进行了讨论并选择六偏磷酸钠作为分散剂测试了由硅灰石制制得的多孔SiO2粉体的颗粒粒径。初步确定,该多孔SiO2粉体作为填料可用于反光塑料制品中。 相似文献
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《矿物学报》2013,(Z1)
This paper studied the reciprocity effect between wollastonite and a strain silicate bacterium from purple soil. We analyzed the changes of pH value, glucose (GLU) residual concentration, electrolyte and Mn, Si, Fe etc. in the culture liquid with wollastonite after 48 h. The results show that the GLU wastage of silicate bacteria with wollastonite is 2.5 times of the bacterial contrast. It showed wollastonite could obviously accelerate silicate bacteria growth, but bacterial cell broken and distorted badly have been found by SEM analysis. The solubilization of silicate bacteria to Si element of wollastonite reached above 10 times. At the same time, three apices in FTIR of wollastonite (898 cm-1, 925 cm-1, 962 cm-1) descended obviously after the action of silicate bacteria, which shows that a great deal of Si has dissolved out. So we can get that wollastonite has remarkable effect to the growth of silicate bacteria and silicate bacteria has obvious solubilization to Si of wollastonite. 相似文献
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Wenjin Ding Liangjie Fu Jing Ouyang Huaming Yang 《Physics and Chemistry of Minerals》2014,41(7):489-496
In this paper, we demonstrated a new approach to CO2 mineral sequestration using wollastonite carbonation assisted by sulfuric acid and ammonia. Samples were characterized by X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and 29Si nuclear magnetic resonance. The change in Gibbs free energy from ?223 kJ/mol for the leaching reaction of wollastonite to ?101 kJ/mol for the carbonation reaction indicated that these two reactions can proceed spontaneously. The leached and carbonated wollastonite showed fibrous bassanite and granular calcium carbonate, respectively, while the crystal structure of pristine wollastonite was destroyed and the majority of the Ca2+ in pristine wollastonite leached. The chemical changes in the phases were monitored during the whole process. A high carbonation rate of 91.1 % could be obtained under the action of sulfuric acid and ammonia at 30 °C at normal atmospheric pressure, indicating its potential use for CO2 sequestration. 相似文献
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甘肃省肃北县金庙沟南硅灰石矿床产于敦煌岩群C岩组三岩段的石英硅灰大理岩与花岗岩的接触带及其附近,矿体呈透镜状、似层状产出。矿区共圈出硅灰石矿体16个,矿体长96~818 m,矿体厚度在1.20~12.33 m之间,矿石品位为φ(硅灰石)=35.53%~51.62%,含矿岩石为石英硅灰石大理岩。矿石的类型可分为团块状硅灰石-方解石-石英型矿石、薄层状硅灰石-方解石-石英型矿石。在矿床地质特征研究的基础上,对矿床成因类型进行了分析,提出了找矿标志,对甘肃北山寻找同类矿床具有借鉴意义。 相似文献
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