Production of cement from industrial waste

A clay-based high-aluminum material and industrial waste (such as slag, fly ash, coal gangue) as the main raw material, add 5% of special additives, the firing temperature is only 700 degrees Celsius, the energy consumption is only 1/2 of ordinary cement The new technology of geopolymeric cement has won exclusive rights to promote in China in June 2003.
This type of cement does not require limestone and has a low fuel consumption. It can reduce coal combustion by 50%, so that dust and waste gas are greatly reduced, and 50% of raw materials are waste residues. Its folding strength label is 2 to 3 times that of ordinary cement. If it is used to build roads, it only needs half the thickness of ordinary cement, which can save a considerable amount of capital.
No cracking is another major feature of this cement. Because there is no crystal water, it will not burst in fires. It can be used to build tunnels and build high-rise buildings. It does not corrode in acid and acid rain environments, and it does not corrode any internal structural steel. It takes only 1 hour to work underwater. Can cure, you can use it to rescue and build seawalls and so on. Never changing color is another characteristic of this cement. Because it is a mineral color, it can not fade in any environment. It is not necessary to invest in the construction of a new plant to produce this kind of cement, and it is entirely possible to use our existing production capacity and equipment for production, thus reducing the cost by two-thirds.
At present, this new technology is being promoted in our country.