| Item |
Index |
| Appearance |
Colorless or light yellow transparent liquid |
| PH (5% water solution) |
4.5-7.5 |
| Viscosity(25ºC) |
≤500mPa·s |
| Density(25ºC) |
0.95-1.05g/ml |
Alumina Defoamer AFV-8020:
This product is polyether defoamer, which is a special defoamer for aluminum oxide developed for foam control in bauxite smelting process. It can effectively eliminate and inhibit the foam in the working solution of red mud sedimentation, seed crystal decomposition and roasting sections. This product has no impact on the efficiency of seed crystal decomposition and will not have any adverse effects on the quality of finished alumina products.
Product features:
Excellent foam suppression capability| Excellent anti-attenuation performance | It can be applied to different mining conditions
Adding method:
Adding method: Add raw liquid, use flow pump for continuous addition
Adding point: Group up tank head tank
Adding quantity: It is recommended to use 10-15ppm. In case of little foam, it is still recommended to use 3-5 ppm to prevent foam from bursting
This product has good continuous bubble inhibition, High degassing efficiency, a full benefit.
1. The amount is small, the solid content is high, the defoaming speed is fast, in the decomposed alumina solution, only a small amount of defoaming agent is needed, and the defoaming time is less than 10 seconds.
2.The chemical properties are stable, not easy to react with organic matter, but not with the industrial production cycle and a large amount of consumption, can save a lot of energy.
3.Has a good anti-foaming effect, and under the premise of not reducing the decomposition rate, there is basically no effect on the product decomposition rate and quality, but also effectively improve the quality of alumina products, bauxite dissolution, red mud settling array, aluminate solution decomposition, mother liquid evaporation and other processes have no adverse effects.
4.In the alumina production process of concentrated aluminum alkali solution, hydrolysis will not occur, long-term contact will not affect their bubble inhibition. Moreover, while defoamer is defoamer, it will also improve the purity of the overflow liquid during the separation of red mud, increase the decomposition half of aluminate solution by 0.6%~3.1%, increase the sedimentation rate of pulp by 0.6~5.5 times, and accelerate the evaporation of mother liquor by 3%~10%.
Application:
Foam removal and suppression in the roasting section
Foam removal and suppression in red mud settling section
Foam removal and suppression in seed decomposition section
Our Advantages
-Excellent dispersion performance
-Excellent stability and compatibility
-Excellent service and cheaper price.
-The performance is obviously better than that of traditional polyether defoamer
Shanghai Guanru Chemical Co., Ltd.
Is a professional enterprise in the research, production and sales of defoaming agent The defoamer products developed and produced by the company are widely used in pulp and paper industry, textile print ing and dyeing industry, architectural coating industry, surface cleaning industry, chemical industry, petroleum industry, sewage treatment industry, etc. Quality is excellent, products are superior; supply is timely, and service is thoughtful! Is a professional defoamer manufacturer.
Supply "Excellent Quality + Reasonable Price + Specialized Services" is our development tenet. The company have scientific management, strong technology and sincerely service system. We welcome customers all over the world visit for business negotiation on the basic of sincerely cooperation and mutual benefit!
China's alumina production process
Mainly includes Bayer method, sintering method and sintering - Bayer combined method, mainly Bayer method. In the process of production, a large number of compound organic foams will be produced in the desiliconization, red mud settling and seed decomposition sections. The main foam problem is concentrated in the seed decomposition section, because the system contains a large number of organic matter, solid impurity particles, aluminum hydroxide particles, so that the foam structure is stable, so that the foam continues to accumulate, and even overflow phenomenon. The formed foam layer covers the liquid level in the tank, which also makes it difficult for the gas to escape from the system. Foam overflow will cause environmental pollution, too much foam will also affect the seed decomposition efficiency, reduce the life of the pump. Therefore, it is necessary to use defoamer to eliminate and control foam.
- Packaging:using 25 kg, 50kg, 120 kg, 200 kg plastic barrel or ton barrels packaging.
- Storage:The storage period is half a year. This product is suitable for storage at room temperature, not near the heat source or exposed to the sunWhen not in use, the container shall be sealed to avoid harmful bacteria pollution.Slight delamination will not degrade product performance.
- Transport:Sealing requirement,And avoid prolonged sun exposure.
1. Why do we need to use defoamer to prepare alumina by modified Bayer process?
First of all, we should understand the difference between the Bayer method and the improved Bayer method. The Bayer method is mainly to dissolve the ore with sodium hydroxide by heating, and then get the white alumina powder through the process of "filtration - acid treatment - aluminum hydroxide precipitation - filtration - strong hot aluminum hydroxide". The improved Bayer rule is to obtain high purity aluminate solution through deep desilication, iron removal and other purification processes, reduce the inclusion of impurities, and obtain alumina through calcination, grinding and other processes.
Due to the need for a lot of chemical reactions in the preparation process, coupled with the effect of external agitation, a large number of bubbles are easily produced in the alumina solution system, which has a certain impact on the dissolution rate and red mud yield of the system, so it is necessary to use alumina defoamer to control the foam in time and improve the production efficiency.
2. What are the specific characteristics of alumina defoamer?
Alumina defoamer is a kind of refined non-silicon emulsion defoamer, which is milky white or transparent liquid in appearance. It has strong defoamer and defoamer ability, and can withstand high temperature and high pressure and strong acid and alkali. Adding a small amount of alumina defoamer to the foaming system helps to make the alumina hydroxide better achieve crystal transformation at high temperature, maintain the balance of liquid amount in the circulation system, and evaporate and concentrate to meet the requirements of the Bayer method of dissolving bauxite to prepare the original pulp.
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