Coagulating agents use in Paper industry
Coagulants (contains Inorganic and Organic coagulating agents)-Coagulating agents, they have an important role in the treatment of water both before and after it is used in industry. Inorganic coagulants (particularly those containing ferrous sulphate) also have important applications in the agricultural and cement sectors.
There are also many other applications where aluminium and iron salts have an indispensable role.
In the paper industry they are used in the sizing and retention parts of the papermaking process.
Sizing controls the amount of liquid the cellulosic fibres in paper can absorb. Appropriate sizing regulates the amount of ink or water that can penetrate into the paper. Without it, our printed papers would end-up a soggy mass.
Retention is a papermaking term which describes the process of separating fibres from water to form a paper sheet. Good retention is essential for economical and quick paper production.
Retention is one of the most controlled parameters in the papermaking process. Improving retention reduces the amount of papermaking compounds, fibres and fillers in the waste water and improves profitability.
To increase fibre and filler retention, aluminium salts, sodium aluminate (SAL) and poly aluminium chloride (PAC) are used. Aluminium salts enhance the effect of other process chemicals (for example, poly-electrolytes) and remove unwanted anionic trash.
In dye printing, bleaching and dyeing, medicine and other industries.
In artificial coal industry, it is used for separating coal and water with excellent effect.
In the oil refining industry, for oil and water separation.
Purifying drinking water, sewage.
Industrial water purification, industrial wastewater, mining, oil field injection water, metallurgy, coal washing, leather and all kinds of chemical waste water treatment.
Coagulants are widely used to purify drinking water and clean municipal wastewater.
Waste water is any water which has been used in an industrial process or household. This includes water used in the treatment of sewage or storm water.
Coagulants also have an important role in the treatment of industrial water.
There are also many other applications where aluminium and iron salts play an essential role.
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