Producing caustic soda from refined salt
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This post was last edited by sunjl1981 on 2013-1-6 at 19:59. Currently, most companies in China use coarse salt to produce soda ash, and this approach comes with many problems. I have recently read several articles on the production of caustic soda, which state that using refined salt yields much better results; however, I don’t understand why few companies opt for refined salt in this process. Could experts tell me what the reasons are? Thank you! This post was last edited by yzhms on 2009-3-27 22:47 ] # ， ， &
There is already a trend in this direction; the key is for salt production enterprises to be able to produce salt and nitrate simultaneously, which can also help reduce the waste emissions from chlor-alkali enterprises. At present, there is increased focus on the management of such waste. It’s mainly a matter of price and cost.
Using refined salt is not cost-effective; the process for producing saline water is quite simple, and it is covered in the ‘chlor-alkali industry’ – you can look into that. During transportation, its particles are small, making it difficult to transport
Now everyone wants to pursue fully halide-based soda production, but each facility is constrained by local resources and environmental conditions. When it comes to companies that use only refined salt, Yunnan Nanphosphorus is one such company.
To reduce the amount of salt sludge, our company has mostly switched to refined salt. Due to environmental concerns, it is still quite difficult to find a place to store salt sludge these days. Considering the overall environmental protection costs, it is acceptable to use refined salt with a higher price in some cases.
1\ High costs are a key factor. 2\ Weighing the pros and cons is also crucial; the best approach should be chosen by taking into account environmental considerations and overall costs
The process of producing soda using coarse salt can meet the requirements; then why use refined salt? Refined salt is more expensive than coarse salt.
As the people who spoke before have already made it clear, the cost of refined salt is too high. Coarse salt is a viable option for us; what’s important is to choose the appropriate type of coarse salt based on its properties. If the impurity content is too high, it increases the processing costs significantly, which is not economical. Additionally, the salt chosen should be suitable for the existing processing methods. It’s best to work with a stable salt supplier; switching to another supplier may lead to fluctuations in the quality of the salt solution, requiring adjustments to the pre-treatment methods. As long as the quality isn’t too poor, any salt can be used.
The use of refined salt to produce caustic soda is costly; it forms a suspended salt in the desalination tanks and tends to clump together, making it difficult to control its concentration. This requires a more sophisticated design for the preprocessing equipment. The best option is to combine refined salt with sea salt.
Refined salt is much more expensive. Also, since we have our own salt mines, we certainly won’t use refined salt. When building a chlor-alkali plant now, one should consider locating it by the sea. Save a lot of money!
I would like to ask the experts here: is there anyone who can provide a numerical figure, so that we can know just how much higher the cost will be?