For different sorts of impurities, we can embrace different techniques of removal methods. Here are several common methods and concepts of salt silicate remedy.
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Precipitation approach
The precipitation technique is a method that makes use of pollutants ions to react with specific chemical reagents to create difficult rainfall so as to eliminate it from the salt silicate option. For example, for steel ions such as iron ions and aluminum ions, alkaline reagents such as salt hydroxide or potassium hydroxide can be included in form it. The reaction formula is as follows:
Fe ⁻ + 3oh f → Fe (OH) ↓
Al ⁻ + 3oh a → Al (oh) ↓
For calcium and magnesium ions, carbonate reagents such as salt carbonate or potassium carbonate can be included in develop carbonate precipitation. The response equation is as adheres to:
CA ₃ ² ⁻ + Carbon monoxide c → CACO ₃ ↓
Mg ₃ ² ⁻ + Carbon monoxide m → mgco ₃ ↓
The precipitation method is straightforward and the cost is low, however you need to focus on the amount and response conditions of the debris to make sure that the impurities ions can be completely precipitated.
Ion exchange technique
The ion exchange approach is to selectively adsorb and trade the ions in the remedy with an ion exchange material to remove the method of contaminations ions. Ion exchange material is a polymer product with an ion exchange function. It can exchange responses with the ion in the solution, soak up pollutants ions to the resin, and preserve the valuable ions in salt ions in salt silicate service in the option.
The ion exchanges are good and can get rid of a selection of contaminations ions, but the cost of ion exchange resin is greater, and regeneration is needed consistently.
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Membrane layer splitting up
The membrane splitting up method uses the semi-diaphragm to precisely go through the various components in the service so as to attain the technique of splitting up and elimination. Depending upon the diameter dimension and splitting up principle of the membrane, the membrane layer splitting up technique can be split right into several types, such as microfiltration, ultrafiltration, purification and reverse osmosis.
For contaminations such as insoluble strong granules and macromolecular raw material in sodium silicate option, mini fillets or ultrafiltration membrane layers can be utilized for eliminating; impurities ions of some small particles can be eliminated with the purification or reverse osmosis membrane layer. The membrane layer splitting up approach has the advantages of straightforward operation, high separation effectiveness, and low energy consumption.
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