On "the people's Republic of ferrous metallurgy industry standards, unshaped refractory materials with silica powder" YB/T115 - 2004 instead of Yb / T 115 - 1997 standard draftsmen: Chen Zhiqiang Gao Jianping Xu Daxiong along with the development of the iron and steel industry of our country and the development of aluminum industry, is bound to lead development of ferrosilicon and silicon metal industry. The development of ferrosilicon and silicon metal powder, silica source, and there will be more better. The development of organic silicon, also strongly promoted the chemical grade silicon smelting. Coupled with the national environmental protection department of ferrosilicon and silicon metal industry flue gas emissions restrictions, more and more silicon manufacturers and silicon metal smelting factory will be installed to collect fine silica powder equipment and powder processing equipment. This can be used for amorphous refractory silica powder will be more and more, better and better. The YB/T - 1997 (115--1997 YB/T115), the standard of the black metallurgical industry of the people's Republic of China, has played a role in the use of silica powder in the last century. But in the implementation process, also encountered a number of problems. Some projects such as the standards do not apply to the test method, the actual can not be implemented; the standard of the application of certain test methods is not, the actual can not be implemented; some of the standards in the application of foreign business standards, not fully applicable to china. Due to the YB/T115---1997 in some of the projects can not be implemented, market appeared the phenomenon of some weeding, as some manufacturers arbitrarily silica powder is super, 91, 92, and some manufacturers even SiO2 is greater than or equal to 90% on the calibration for 94 grade, SiO2 is greater than or equal to 85% is marked as 92. Some manufacturers even use a double standard, the same level of silica powder with different specifications. Although the use of silica powder in order to use the principle of good manufacturers, but there must also be a unified standard; otherwise no rules will not Cheng Fangyuan. In summary, the YB/T115 - 1997 standard is imperative. Upon inspection, there is no special purpose of the international standard of refractory materials.
