几种矿物的超细加工及对建材防氡防辐射性能的影响  

STUDY ON ULTRAL-FINE GRINDING FOR SEVERAL KINDS OF MINERALS AND THEIR CAPABILITY OF RADON-PROOF & RADIATION-PROTECTION IN BUILDING MATERIALS

作　　者：何登良[1] 董发勤[1] 邓跃全[1] 徐光亮[1] 

机构地区：[1]西南科技大学,四川绵阳621010

出　　处：《矿物岩石》2005年第3期127-130,共4页Mineralogy and Petrology

基　　金：国家高技术研究发展计划(863计划)(编号:2001AA322070);教育部优秀青年教师奖资助项目;教育部重点项目(编号:204118)

摘　　要：采用湿法搅拌磨和气流磨,对用作防氡防辐射基元材料原料的重晶石、沸石进行超细加工和激光粒度分布测试,结果表明:重晶石、沸石通过湿法和干法粉磨加工,在一定的时间内都可以超细粉碎到d90小于10 μm,从粉磨时间以及粉磨成本来比较干磨法要明显优于湿磨法;重晶石进行超细加工后所制备的水泥砂浆的外照射指数从0.51降到0.23,重晶石所配腻子的氡和放射性屏蔽率提高20%～30%.当沸石的粒度减小时,水泥砂浆对氡的屏蔽率提高的屏蔽率最大达26%.沸石从119μm降到18 μm时,腻子的防氡率从37.9%提高到53.1%.防辐射性能从整体上来看是粒度越细性能越好.Stirred mill and jet pulverizer are used to crush barite and zeolite which can be used as elementary material of radon-proof and radiation-protection in building materials, and the laser particle size distribution of barite and zeolite was tested. The results indicated that：the size of barite and zeolite crushed via stirred mill （wet method） and jet pulverizer （dry method） within a certain time can reach d90, smaller than 10 μm. Considering processing periods and costs, the latter was obviously superior to the former. The outer-irradiation index of the cement mortar made by the super-fined Barite was decreased from 0.51 to 0.23. The radon-proof and radiation-protec- tion rate of putty went up to 20%-30%. When the granularity of Zeolite was downsized in some degree, the radon-proof rate of cement mortar met its peak value （26%）. And with the size of Zeolite dropped from 11 μm to 7μm,the radon-proof rate of putty increased from 37.9% to 53.1%. Generally,the smaller the granularity was, the greater the radiation-protection feature was.

关 键 词：重晶石 沸石 超细加工 防氡防辐射 

分 类 号：O654.2[理学—分析化学] X591[理学—化学]