Removal of arsenic and fluorine from acid produced from smelting flue gas.
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Are power waves combined with flocculants effective in removing arsenic and fluorine from flue gas? If I can add some, where should I choose to do it? First-order power wave? Packed tower? Is it still a secondary power wave? I need experts’ advice!
Based on our experience, it is basically ineffective.
I added water glass; water glass is used to remove fluoride. It is mixed with water in a ratio of 1:3, and primary and secondary dynamic waves are applied. The effect is okay
I’m also using water glass, but it’s hard to control. How do you adjust the fluoride content and the amount of water glass added?
The amount of water glass to be added can be calculated based on the chemical reactions; if the fluoride content in the ore is relatively stable, a certain margin factor is added to the calculated amount, and this should suffice as an average addition amount. There is an article on this topic in the fourth issue of \"Sulfuric Acid Industry\" published in 1999, which can be referred to.
Here, I add it in amounts of around 300 kg at a time after dilution; would the effect be better if I used dropwise addition instead? The fluoride content at the fan outlet is now 0.005 mg.
Don’t add too much in the first stage, as the high acidity can cause fluoride to leach out; most water glass should be added in the final washing stage.