Utilization measures for calcium carbide slag
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Potassium chlorate is produced by using calcium carbide slag in place of lime. The production process involves first removing impurities from the calcium carbide slag slurry and then sending it to a sedimentation tank to obtain an emulsion with a concentration of 12%. This emulsion is then pumped into a chlorination tower, where chlorine and oxygen are introduced. In the chlorination tower, Ca(OH)2 reacts with Cl2 and O2 through a saponification reaction to produce Ca(ClO3)2; after removing free chlorine, solids are removed using a plate and frame filter press. The resulting solution is then subjected to a double displacement reaction with KCl to yield a KClO3 solution. Through processes such as evaporation, crystallization, dehydration, drying, crushing, and packaging, potassium chlorate (KClO3) is produced as the final product. The reaction equations are as follows:Ca(OH)2 + Cl2 + O2 → Ca(ClO3)2 + H2O
Ca(ClO3)2 + KCl → KClO3 + CaCl2
For every 1 ton of potassium chlorate produced, 10 tons of calcium carbide slag can be used, which saves 4 tons of lime. This results in a savings of 420 yuan per ton of product in terms of raw material costs. Using calcium carbide slag instead of lime to produce potassium chlorate (KClO3) is technically feasible; it enables the comprehensive utilization of calcium carbide waste residues. This not only reduces the environmental harm caused by such residues but also decreases pollution resulting from the storage and transportation of lime, while simultaneously improving working conditions. This post was last edited by hxx025 on 2008-8-21 10:57.]
There’s a bit less content! Hehe, but it has still helped us understand that calcium carbide slag can be used as a substitute for lime in the production of potassium chlorate. In fact, calcium carbide slag can replace lime in many applications where lime slurry, or calcium hydroxide, is used. The main component of calcium carbide slag is calcium hydroxide, with small amounts of hydrogen sulfide and other impurities. This post was last edited by hxx025 on 2008-8-22 at 11:26
I already have them. Are there any others?
Electroslag stone is mainly calcium hydroxide, and it has many applications
It’s interesting; calcium carbide waste really does need to be properly handled
Our company uses a large amount of calcium carbide slag every year to neutralize acidic wastewater. Currently, many enterprises generate acidic wastewater as an inevitable part of their production process, which requires a large amount of alkaline substances for neutralization. Using calcium carbide slag represents a way of turning waste into useful material; here, the cost of calcium carbide slag is 30–50 yuan per ton, while in some places it is even provided free of charge. Hehe
Calcium carbide slag should be able to replace calcium hydroxide (slaked lime) in most cases, which can save a considerable amount of money! According to Hebei Cangzhou Road and Bridge Company, it can be used on the subgrades of highways and high-grade roads as a substitute for calcium hydroxide in such subgrades. The performance is quite good!
Our factory has a cement plant; the calcium carbide slag produced there is mostly used for internal consumption. The wastewater treatment plant also makes use of this slag to neutralize wastewater. Care must be taken when there is an excess of such slag, as it contains a significant amount of sulfides, and after neutralization of the pH level, the levels of sulfides can become excessive again. This calcium carbide slag also releases some acetylene; when it is used in enclosed spaces, or when working on transmission pipelines where welding is involved, precautions must be taken to prevent explosions. There are also some environmental protection companies that package calcium carbide slag and label it as pH-adjusting salt in order to make big profits.
Calcium carbide slag should be recycled; it can be used to neutralize waste acids, and if conditions permit (such as the availability of carbon dioxide waste gas), it can also be used to produce light calcium carbonate.
For cement production, we have several companies here~~
Could you provide more details? ! When used for desulfurization, calcium sulfate is produced; it is worth exploring how to utilize calcium sulfate in further processing
Using calcium carbide slag in the production of nano-calcium carbonate yields products of high quality and high added value.
The cement industry has a plan for industrialization; I haven’t seen any others. Thank you all for the information.
Yes, calcium carbide slag is quite good for desulfurization, but care must be taken regarding wear; poor filtration can easily cause the nozzles to wear out.
Calcium carbide slag can be used as a binder for autoclaved bricks in place of calcium oxide, and it is widely utilized in the building materials industry