The 7th China (Guangzhou) International Safety Production and Protection Products Exhibition will be held on June 3, 2014 at Guangzhou Poly World Trade Expo Expo Center! The current exhibition is expected to have an overall scale of 15,000 square meters, 300 exhibitors, and 12,000 professional visitors. Each 9m2 standard exhibition booth to participate in the exhibition fee is 9800 yuan, 10% discount for the Association members. Since December 2013, the Organizing Committee of the Guangzhou Security Protection Exhibition has actively and comprehensively recruited investment invitations. As of now, the number of companies booking booths has continued and the exhibition booths have been hot. In addition, the previous exhibitors have achieved remarkable results. In order to once again seize the opportunities in the industry's South China market and even the national market, they will expand the exhibition area. For example, Chengdu Qiangjing Garments debuted at the Guangzhou International Safeguard Exhibition last year at 36 square meters and was reloaded this year to 54 square meters. Rice once again had a strong attack and seized the opportunity. The annual Guangzhou Security Exhibition will be staged on June 3 this year. At this stage, it is an order-buying upsurge that will not be missed. Let us look forward to the arrival of this grand event and share opportunities for exhibition trade. Book booth hotline
15-25mm Calcium Carbide: Physical and chemical properties: ores are solid brown or black block, pure white crystals (including CaC2 higher purple). Density of 2.22 g / cubic centimeter, the melting point of 2300 ° C (with CaC2 content), water immediately intense reaction to generate acetylene, and release heat, Calcium Carbide content varies with the melting point also will change.
Impurities: Caustic soda often contain calcium arsenide (Ca3As2), calcium phosphide (Ca3P2) and other impurities, and the role of water at the same time release arsine (AsH3), phosphine (PH3) and other toxic gases, so the use of Acetylene generated by calcium carbide is toxic.
Crystal structure
The most common crystal form of CaC2 is tetragonal, stable between 298K and 720K. Quartet CaC2 similar to the crystal structure of NaCl, but due to [: C≡C:] 2- ion oval, oriented, the crystal is tetragonal. In CaC2 crystal, the C-C distance is 120pm, which corresponds to the bond length of carbon-carbon triple bond, the distance between Ca and C is 259 and 282pm.
15-25Mm Calcium Carbide,Acetylene Plant Calcium Carbide,Industrial Calcium Carbide,Steel Calcium Carbide Ningxia Tongji International Trade Co.,Ltd. , https://www.tongjiinternational.com