Calcium carbide is an inorganic substance, the chemical formula is CaC2, the main component of calcium carbide, white crystals, industrial products are gray-black lumps, and the cross section is purple or gray. It reacts violently when encountering water, generating acetylene and releasing heat. Calcium carbide is an important basic chemical raw material, mainly used to produce acetylene gas. Also used in organic synthesis, oxyacetylene welding, etc.
Acetylene produced by the reaction of calcium carbide with water can synthesize many organic compounds such as synthetic rubber, synthetic resin, acetone, ketene, carbon black, etc.; at the same time, acetylene-oxygen flame is widely used in metal welding and cutting.
Store in a cool, dry and well-ventilated warehouse. Keep away from fire and heat sources. The relative humidity is kept below 75%. The packaging must be sealed and protected from moisture. It should be stored separately from acids and alcohols, and avoid mixed storage. The storage area should be equipped with suitable materials to contain the leakage.
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The mold industry still has many problems to be solved
There are many stumbling blocks in the development of the foundry mold industry in China. The analysis of relevant experts mainly has the following problems: First, the development is unbalanced and the overall level of products is low. Although the products of individual companies have reached a fairly high level, some of the products of individual companies have reached or are close to the international level, but overall, the accuracy of molds, cavity surface roughness, production cycle, life expectancy and other indicators with foreign advanced level There is still a big gap. Second, technological equipment is backward and organizational coordination is poor. Although some mold enterprises have undergone technological transformation in recent years and the level of technological equipment has been relatively advanced, most of the company's technological equipment is still relatively backward. Third, most companies have weak development capabilities. On the one hand, the proportion of technicians is low, and the level is not high enough. On the other hand, less investment in scientific research and development, and more importantly, the concept is backward, and the importance of development is insufficient. Fourth, management is even more backward than technology. Backwardness in technology is often easy to see, and management is sometimes difficult to realize. Fifth, the market demand is strong, and it is difficult to keep up with the development of production for a time. The contradiction between supply and demand is difficult to solve for a time. The situation that supply exceeds demand will continue for some time, especially in the middle and high-grade products. Sixth, the solution of institutional and talent issues will take some time to come. In the socialist market economy, in the process of economic globalization, competitive industries, especially those that depend on special users like molds and require single production, are still difficult to adapt to the current system and operating mechanisms of many enterprises. Market. Taking these issues as the entrance, we will continue to work hard and believe that in the future our country's foundry mold industry will embark on a stable path.