Coal Washing Polyacrylamide
Coal washing polyacrylamide is a more professional polyacrylamide.Better than the general effect of polyacrylamide precipitation.Coal mined in coal mining usually contains some impurities, and the separation efficiency of coal and impurities can be improved by adding flotation agents.Cleaned...
Coal washing polyacrylamide is a more professional polyacrylamide.Better than the general effect of polyacrylamide precipitation.Coal mined in coal mining usually contains some impurities, and the separation efficiency of coal and impurities can be improved by adding flotation agents.Cleaned coal flotation, tail coal sedimentation.The cleaned coal is then wound back and forth through sedimentation, filtration, or centrifugation.Polyacrylamide is used in the settlement process to facilitate solid-liquid separation.The water is then sent to the thickener and recycled by the overflow of the thickener.Powdered cleaned coal is filtered and recycled by centrifugation.Polyacrylamide is added again during filtration and centrifugation to improve separation efficiency.
Application of QUANSEN PAM in coal washing industry
The coal industry produces large amounts of sewage either from production or transportation.These effluents are characterized by heavy pollution and difficulty in treatment.The discharge of coal washing wastewater is relatively large, and the quality of coal washing wastewater varies greatly in different regions. The selection of polyacrylamide is also different.
According to the experience of QUANSEN polyacrylamide washing coal generally use anionic polyacrylamide, but it is not always right, sometimes also use cationic polyacrylamide and non-ionic polyacrylamide, this needs to be determined according to the water quality of wasterwater.
Coal washing polyacrylamide is a more professional polyacrylamide.It's just a matter of adjusting the chemical composition.Special polyacrylamide for coal washing is several times more effective than general polyacrylamide. It is very effective in coal washing and filtration, or in the discharge of groundwater. Its reaction time is about 5 seconds, and the effect of precipitation can be seen.
Coal mined in coal mining usually contains some impurities, and the separation efficiency of coal and impurities can be improved by adding flotation agents.Cleaned coal flotation, tail coal sedimentation.The cleaned coal is then wound back and forth through sedimentation, filtration, or centrifugation.Polyacrylamide is used in the settlement process to facilitate solid-liquid separation.The water is then sent to the thickener and recycled by the overflow of the thickener.Powdered cleaned coal is filtered and recycled by centrifugation.Polyacrylamide is added again during filtration and centrifugation to improve separation efficiency.
Polyacrylamide for coal washing belongs to anionic type, also called special agent for coal washing.The molecular weight goes from 8 million to 18 million.The special polyacrylamide for coal washing must choose proper flocculant to strengthen the treatment of coal slime water in order to make the coal slime water precipitate quickly in the concentration pond, ensure qualified washing water and filter coal slime production, and make the production efficient and economical
【QUANSEN PAM action principle】
Polyacrylamide PAM for short, is a kind of linear polymers, non-toxic, non-corrosive, soluble in water, its aqueous solution and the coal water mixture and coal washing special polypropylene phthalein amine molecular chain reactive with fine particles of slime water surface adsorption, plays a role of connection between the particles and the fine grain to form bigger floccules, accelerates the slime settling velocity.The addition of water solution of polyacrylamide for coal washing is the key link in the treatment of slime water.
【QUANSEN PAM features】
1. Fast formation of large flocculation, large and compact alum flowers, small amount of sludge and fast flocculation sedimentation
2. Dissolution is rapid and complete, with no dissolved substance (fish-eye);The powder state product is dissolved for about 60 minutes
3. Practical economy, small dosage, good effect and high dehydration rate;Low operation cost, low dose can produce effective effect and high dehydration performance, very economical
4. Excellent filtration and water removal can improve the dehydration effect of sludge
5. Automatic feeding;Easy to handle
【Method of use】
For coal washing polyacrylamide, proper amount must be added to effectively play its flocculation.The treatment technology and properties of slime water can be determined by test.The content of coal slurry will slow down, the concentration overflow will easily exceed the standard, and the required circulating water index cannot be guaranteed, thus making the coal washing product index difficult to control stably.
Too much content, although accelerating the sedimentation rate of coal mud, but easy to cause concentration of concentrated bottom flow too high;Generally, concentration of concentrated underflow is required at 500g/L, which can meet the requirements of pressure filtration production.Excessive dosage makes concentration of concentrated underflow sometimes as high as 700g/L and the content of polyacrylamide in underflow increases, which is adverse to underflow transportation and pressure filtration production. When coal cake is decomposed by pressure filtration, the coal cake is not easy to fall off, which increases the labor intensity of operators and reduces the work efficiency.At the same time, it also causes the waste of chemicals and increases the production cost.Therefore, the appropriate use of polyacrylamide can not only improve flocculation effect and effectively treat slime water, but also play an important role in ensuring the index of coal washing products, improving work efficiency and reducing cost.
Test instruments and reagents needed for measuring the amount of coal washing agent polyacrylamide: turbidity meter and pH meter;Polyacrylamide;Sodium hydroxide;Alkali aluminum chloride;A beaker.Various calibration straws.
【Quansen PAM specification】
Dissolution duration （h)
【 attention 】
1. When used, it is extremely important to effectively disperse the product in the water, otherwise it will lead to the aggregation of dispersants and the production of "fisheye", and the dissolution time will increase.
2, use warm water can accelerate the dissolution rate, but the temperature is too high, lead to the thermal degradation of polymer chain, viscosity will be affected, the average water temperature should not exceed 50 ℃.
3. Using stirring can help dissolve, but stirring too violently can break down the long chain of dispersing agent, and it is better to adopt ship type propulsion.
4. The water solution should not be stored for more than 48 hours, otherwise the viscosity will be reduced and the effect will be affected.
【 storage 】
The original product shall be kept sealed.Storage environments should be a cool, dry and ventilated, at room temperature for 10 ~ 40 ℃.Special precautions should be taken to prevent product absorption.
In accordance with the specified storage conditions, the original packaging products can be stable for at least 12 months.
【 packing 】
25kg composite paper bag /750kg pallet OR customer demand.