Difficultly starts an undertaking after several years repeated difficulties , the scale grows strong unceasingly , at the same time thanks the general customers the vigorously support and the deep affection , develops successively develops the product : the cupric sulfide 、 the froth powdered iron 、 one 、 two time return to original state the powdered iron 、 the chromite 、 the pyrite 、 not the rusty powdered iron 、 the refinery coke 、 the wollastonite ( silicon ash cotton and kapok ) and so on the series powder body material 经过几年风风雨雨的艰苦创业，规模不断发展壮大，同时感谢广大客户的大力支持和厚爱，先后开发研制出产品：硫化铜、泡沫铁粉、一、二次还原铁粉、铬铁矿、硫铁矿、不生锈铁粉、石油焦、硅灰石（硅灰棉）等系列粉体材料。
4 . the interfacial soaking experiment of wollastonite / polypropylene composite material has further manifested that the cohesive strength of the interface between modified wollastonite 2 by stearic acid and polypropylene is higher than that of the interface between wollastonite and polypropylene , the interface between modified wollastonite 1 by stearic acid and polypropylene , the interface between modified wollastonite 3 by stearic acid and polypropylene , the interface between modified wollastonite by aluminate ester and polypropylene , the interface between non - modified wollastonite and polypropylene . 5 硅灰石增强复合材料的界面浸润性测量实验进一步表明，在硅灰石pp的复合体系中，改性硅灰石与pp基体的界面结合强度高于未改性硅灰石；硬脂酸改性硅灰石与pp基体的界面结合强度高于铝酸酯改性灰石；粒度为2号样的改性硅灰石与pp基体的界面结合强度高于1和3号改性硅灰石。
The test results show that the whiteness of high - grade grammite powder can be increas4ed from 72 to 84 by using single high - intensity magnetic separation , and the one of low - grade grammite powder containing carbonaceous materials from 62 to about 81 by using the hims - airflow pulverising - flotation flowsheet 试验结果表明，采用单一强磁选方法可将硅灰石富矿粉的白度由72提高到84 ；采用强磁选-气流粉碎-浮选新工艺可将含碳质物的硅灰石贫矿粉的白度由62提高到81左右。
These studies have shown significant results : to protect wollastonite ' s crystal structure , we can forge and then cool it before fining ; adopting mechanochemical modification by jet mill , we can make wollasonite to fine and modification at the same time ; in order to understand thoroughly the major results achieved in enhancement of mechanical capabilities of the polypropyl ene filled with the modified wollastonite , this paper has researched deeply the interface mechanism through combining experiments and measure means with theory analysis , and tried to give a further explanation and demonstration about improving of the macroscopic mechanics performances of composite material and to offer a theoretical basis for improving material ' s mechanical properties 特别是采用粉碎前对硅灰石煅烧空冷处理的方式，获得了超细化程度更高、长径比更大的硅灰石；利用机械力化学改性及超音速气流粉碎技术，使硅灰石粉碎?改性同时完成；应用现代测试手段，结合实验对界面微观形貌、结构及其机理进行研究，进一步解释与论证了复合材料的宏观力学性能，为改善复合材料的综合性能提供了理论基础。这些方面的研究在同类研究中具有一定的创新性。
