碳酸钙

The current market price of the light calcium carbonate in China is around 500 to 650 RMB per ton, while the price of light calcium carbonate for ultrafine ink production is 1800 to 2000 RMB per ton.

目前我国市场普通轻质碳酸钙的价格为500～650元/t，活性轻质碳酸钙价格为800～1200元/t，油墨用超细轻质碳酸钙价格为1800～2000元/t。

Nano-calcium carbonate was compared with carbon black N330,white carbon black and light calcium carbonate,at the same time,the effection of process property,process oil and different surface preparative ways on rubber properties was studied.

并将纳米碳酸钙与炭黑N330、白炭黑和轻质碳酸钙的性能进行对比，同时考查了工艺性能、操作油以及纳米碳酸钙的不同表面处理方式对胶料性能的影响。

According to the production method and the use, calcium carbonate has nano calcium carbonate, light and heavy calcium carbonate and grind calcium carbonate.

市场分析：碳酸钙是塑料、橡胶、造纸、涂料等基础工业的重要填料，按照生产方法和用途的不同分为纳米碳酸钙、轻重碳酸钙、复合碳酸钙和研磨碳酸钙等。

It can be classified as heavy calcium carbonateand light calcium carbonateaccording to processing methods.

根据加工方法不同可分为重质碳酸钙、轻质碳酸钙；根据是否改性可分为普通碳酸钙和活性碳酸钙；根据用途不同可分为专用碳酸钙。

Now, we specialize in the research, development and production of nonmetal superfine powder. Equipped with over 20 leading superfine powder production lines. we can yearly produce 300,000 tons of 60mesh to 7000mesh products including heavy calcium carbonate, surface treated calcium carbonate and French chalk, etc.

公司专业致力于非金属超细粉体的研究、开发和生产，现拥有国内外现代化超细粉生产线二十余条，主要生产和经营重质碳酸钙、表面处理碳酸钙、滑石粉等非金属超细粉，年产60-7000目重质碳酸钙、表面处理碳酸钙、滑石粉30万吨。

The DSC results showed that calcium carbonate,sodium benzoate and terephthalic acid were the nucleating agents of polypropylene with high thermal stability of the nucleating effect,while the thermal stability of nucleating effect of pimelic acid,suberic acid,azelaic acid,and the two component nucleating agents suberic acid/calcium carbonate and azelaic acid/calcium carbonate were poor.

研究了碳酸钙、苯甲酸钠、对苯二甲酸和脂肪二元酸：庚二酸、辛二酸、壬二酸及其与碳酸钙组成的双组分成核剂对聚丙烯结晶成核效果的热稳定性。结果表明，高熔点物质碳酸钙、对苯二甲酸、苯甲酸钠的成核效果的热稳定性高，而脂肪二元酸的成核热稳定性低。庚二酸与碳酸钙组成的双组分成核剂的成核热稳定性高，但辛二酸、壬二酸与碳酸钙组成的双组分成核剂的成核热稳定性没有得到改善。

By the testing means of electron-spectroscopy for chemical analysis , thermogravimetric analysis , differential scanning calorimetry , transmission electronmicroscopy , the results have shown that the emulsion polymerization in situ in the presence of nano-particle of calcium carbonate can happen smoothly and successfully and the surface of nano-particle of calcium carbonate have been capsulated by polymer of acrylates, which prevent from the agglomerating of nano-particles of calcium carbonate. Because the copolymer of acrylate has good compatibility with some plastics such as PVC, ABS, AS and so on, so the dispersion of nano-scale calcium carbonate as nanometer size in these plastics can be reached more easily and the effects of nanometer can happen.

通过X射线光电子能谱、热失重分析、动态扫描量热分析、透射电子显微镜等手段，证实在纳米碳酸钙原生粒子存在下，可以进行丙烯酸酯类的原位乳液聚合，乳液聚合顺利，纳米碳酸钙表面被丙烯酸酯类聚合物所包覆，使纳米碳酸钙粒子间的团聚不易发生，同时由于丙烯酸酯类聚合物与PVC、ABS、AS等极性聚合物具有较好的相容性，从而使纳米碳酸钙在聚合物基体中能达到纳米状态分散，从而发挥纳米效应。

The results show that the introducing of multivinyl monomer and CaCO3 can slow down polymerization rate to different extent.Using 1％～5％ trimethylolpropane trimetbacrylateor divinyl benzene,tight encapsulation of CaCO3 can be realized and beyond 94％PS cannot be extracted. The amount of crosslinker or emulsifier should be accommodated when the load amount of CaCO3 is increased.CaCO3 content in the product increases consequently with the increase of the loaded amount of CaCO3,which can be known from FT-IR and TGA.TEM observations reveal that when the load amount of CaCO3 is 14.8％,most CaCO3 particles are encapsulated and each latex particle contains one CaCO3 particle.Composite particles have well-defined core—shell structure and the thickness of polymer shells is around 10 nm.However,the thickness of polymer shell decreases and many free CaCO3 particles appear when the load amount of CaCO3 reaches 29.3％and 58.7％,respectively.

结果表明，多乙烯基单体以及碳酸钙的引入会使聚合反应速率有不同程度的降低；使用1%～5%的TMPTMA或DVB，可实现PS对碳酸钙颗粒的牢固包覆，不可抽提的PS达94%以上；当碳酸钙用量改变时，需要适当调整乳化剂和多乙烯基单体的用量；IR和TGA的结果表明，随着碳酸钙用量增加，产物中的碳酸钙含量也相应增加；TEM照片和计算结果显示，当碳酸钙用量为14.8%时，绝大部分碳酸钙颗粒被包覆，且基本上每个乳胶粒中包覆一个碳酸钙颗粒，复合粒子具有清晰的核壳结构，壳层厚度约为10 nm，而当碳酸钙用量增加到29.3%和58.7%时，壳层厚度减小，并且出现较多裸露的碳酸钙颗粒。

The article introduced the characteristics of different calcium carbonate used in cigarette paper and the quality index of cigarette paper in the world.

介绍了国内外卷烟纸质量指标及卷烟纸用碳酸钙的质量情况，用实验数据阐述了碳酸钙用量、不同产地碳酸钙以及不同品种碳酸钙对卷烟纸、卷烟性能的影响，为生产不同档次的卷烟纸提供了基础资料。

Under the company sets up the light quality calcium carbonate factory, the active calcium carbonate factory, the Heavy tar calcium carbonate factory, a calcium carbonate mother grain of factory, the special-purpose nanometer calcium carbonate factory and raw material factory six branch offices; Has the light quality calcium carbonate 50,000 ton, the active calcium carbonate 20,000 ton, the Heavy tar calcium carbonate 10,000 ton, the calcium carbonate mother grain 20,000 ton, the special-purpose nanometer calcium carbonate series product 10,000 tons with the calcium carbonate undressed ore 200,000 ton year productivity.

公司下设轻质碳酸钙厂、活性碳酸钙厂、重质碳酸钙厂、碳酸钙母粒厂、专用纳米碳酸钙厂和原料厂六个分支机构；具有轻质碳酸钙5万吨、活性碳酸钙2万吨、重质碳酸钙1万吨、碳酸钙母粒2万吨、专用纳米碳酸钙系列产品1万吨和碳酸钙原矿20万吨的年生产能力。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。