Cement grinding aid is a chemical additive that improves the grinding effect and performance of cement grinding. It can significantly increase the output of cement platform, the strength of cement at various ages, and improve its fluidity. The cement grinding aid can greatly reduce the phenomenon of electrostatic adsorption ball formation formed during the grinding process, and can reduce the re-agglomeration tendency of the ultrafine particles formed during the grinding process. The cement grinding aid can also significantly improve the fluidity of the cement, improve the grinding effect of the mill and the powder selection efficiency of the classifier, thereby reducing the energy consumption of the grinding. The cement produced by the grinding aid has a lower tendency of compaction and coalescence, which is beneficial to the loading and unloading of the cement and can reduce the wall hanging phenomenon of the cement storage.
A grinding aid is a surfactant that can improve the grinding environment. The common grinding aid is to improve the grinding effect by improving the viscosity of the material in the mill, the dispersion of the particles and the flow state of the slurry. To a large extent, it solves the problems of powder consumption and energy consumption.
The main purpose of the grinding aid is to reduce or terminate the aggregation of the particles, to improve the fineness of the cement and the specific surface area, or to grind to the same fineness, and to increase the productivity when adding the grinding aid. At the same time, the addition of the grinding aid adsorbs the surface of the cement particles, reduces the friction between the particles and the adhesion, so that the cement particles slide, and the fluidity thereof also becomes better, thereby improving the grinding efficiency and the cement performance.
The slag cement has the advantages of low hydration heat, high late strength, inhibition of alkali aggregate reaction, and resistance to sulfate corrosion, and has been applied in a large number of projects. When producing slag cement, due to the poor grindability of slag compared with clinker, the best active particle size is not achieved when co-grinding, and the single grinding will cause a lot of energy consumption, so it is used in the grinding process. Grinding aids to reduce grinding energy consumption and improve cement performance. Triethanolamine (TEA) and Triisopropanolamine (TIPA) are the main components of common grinding aids. They have strong polarity and can reduce the free energy of cement particles, prevent particle agglomeration and increase particles. The specific surface area also accelerates the hydration rate of clinker minerals. Most of the cement grinding aids are alcohol amines and polyols.
From the grinding aid industry itself, there are more and more cement companies that recognize the energy-saving and consumption-reducing effects of grinding aids and the quality of grinding aid products. However, curbing the environment of overcapacity has led cement companies to be more careful in the procurement of raw materials. When choosing grinding aids, major groups have adopted the method of “collective procurement, bidding and bidding”, which not only requires quality, but also lowers the price, thus transferring the burden of reducing production costs to their own little brothers. Grinding industry. Due to the “small and porridge” of the grinding aid industry, the competition for vicious low prices has intensified. The consequence of “killing each other” is that it is more difficult to promote the promotion of high-quality grinding aids.
With the development of the cement industry, the effect of cement enterprises on cement grinding aids has also changed. Nowadays, the role of grinding aids in cement production is not only energy saving, but also needs to be enhanced and increased. Performance. Therefore, in the production process of grinding aids, the requirements for production equipment have also undergone earth-shaking changes. Having a complete grinding aid production line does not mean that the grinding aid company is strong. He also needs professional technical talents and researchers, complete laboratory equipment and so on.
In the cement industry production, in order to improve the grinding efficiency, reduce the power consumption of the mill, reduce the fineness of the cement, and improve the quality of the cement, a small amount of material-grinding aid must be added during the grinding process. The grinding aid is composed of one or more surface active substances and other chemical additives. It can reduce the surface energy of the grinding powder during the grinding process, overcome the attraction between the grinding powder, reduce the crushing resistance and prevent Paste the ball. Improve the fluidity of the mill, thereby reducing the power consumption of the mill and improving the grinding efficiency.
Water reducing agent is one of the most important types of concrete admixtures. It can be used alone or as a compound admixture with other functional components. It is a high performance water reducer for improving many properties of fresh and hardened concrete. The high performance water reducing agent is a water reducing agent having a higher water reducing rate, a better slump retention performance, a smaller drying shrinkage, and a certain air entraining performance than the superplasticizer. High performance water reducing agent has obvious technical advantages and high cost performance compared with other water reducing agents when formulating high strength concrete and high durability concrete.
Development and application prospects of cement grinding aid products
The main market for the application of cement grinding aids, the development and application of new cement grinding aid products need to be strengthened, and its research focus has shifted to polymer synthesis technology. The synthetic polymer grinding aid combines various functional groups into the main chain structure of the polymer, and the smaller grinding aid effect and the compound grinding aid have a leaping improvement. Because the synthetic polymer grinding aid generally has a low effective amount, the grinding aid has obvious effect, and a suitable dosage range, the fluctuation of the dosage has little effect on the performance of the cement, and the production safety can be better ensured. Polymer grinding aids have low cost, good performance and high comprehensive benefits, and have broad application prospects.
Introduction to cement grinding aids and two principles
Cement grinding aid is a kind of chemical additive to improve the grinding effect and performance of cement grinding. It can significantly increase the output of cement platform, the strength of cement at different ages, and improve its fluidity. The cement grinding aid can greatly reduce the phenomenon of electrostatic adsorption ball formation formed during the grinding process, and can reduce the re-agglomeration tendency of the ultrafine particles formed during the grinding process.
Cement grinding aid industry will usher in a more standardized development period
The main function of cement grinding aid is to help the grinding in the grinding process. As a grinding aid manufacturer, we must first strengthen production management and determine appropriate internal control indicators