There are two main production technologies for domestic foam concrete: steam-free foam concrete block equipment and autoclaved aerated concrete block equipment. Therefore, there has been a struggle between steaming and steaming, and many investors do not know how to choose that type. Therefore, it is necessary to analyze the advantages and disadvantages of the two equipments and technical processes, and provide a reliable solution for every friend who is interested in the building materials industry.
1. Differences and characteristics between steam-free building blocks and autoclaved aerated blocks
The autoclaved aerated block material contains cement, lime, fly ash, etc., and is formed by steam heating and curing , so it is simply referred to as : aerated block. And steamed with foam concrete blocks, to form a block by natural curing, steam curing without adding air, i.e., so called steamed Block foam concrete blocks, its strength and density autoclaved aerated block exactly the same, may be Alternatively aerated block use, widely used in urban construction of high-rise buildings, solved by two, three urban framework structure without the problem of lightweight insulating wall materials, the development of a great market space.
From the source of raw materials:
Non-steamed foamed concrete block: appropriate amount of cement with coal ash, slag, slag, coal gangue, ceramsite, tailings sand, volcanic ash (slag), steel slag, water slag, welding slag, phosphate residue, industrial waste residue, etc. In combination with high-tech foaming agents.
Steamed concrete blocks: cement blending ash, slag, slag, coal gangue, ceramsite, tailings sand, volcanic ash (slag), industrial waste residue, etc. Foaming agent.
From the production process comparison:
Non-steamed foamed concrete block: It is fully mixed with cement by slag, coal ash and other waste materials, and added with high-tech foaming agent to form foam concrete and then cast mold. After curing, the mold is allowed to stand still and cut into blocks of different sizes as needed.
Steamed concrete block: grinding pulverized coal or silica sand, slag and water into slurry, adding powdered lime, appropriate amount of cement, gypsum and foaming agent, foam stabilizer into the mold frame after stirring, static curing foaming, cutting The blocks or plates of various specifications are sent into the autoclave by the steaming car, and the porous lightweight concrete products are formed by high temperature and high pressure steam curing.
From the production process and cost comparison:
Non-steamed foamed concrete block: The process is one step further than the steamed concrete block, reducing the high temperature steaming step. Save manpower, material resources, financial resources, and time. Greatly reduce production costs. The production process does not burn coal, the air is not polluted, and energy is saved.
Steamed concrete blocks: If you choose to invest in a set of aerated concrete bricks that produce non-load-bearing lightweight bricks, you need more than 1 million to reach more than 10 million. Such a huge investment has made many investors forget to stop. The raw materials for investing in aerated concrete bricks are single, only fly ash can be used as raw materials, aluminum powder is used as foaming agent, and environmental protection procedures for boilers and autoclaves are difficult to approve (additional pollution treatment equipment and measures are required). The biggest disadvantage of aerated concrete brick equipment is the complexity of the process. In the production of non-load-bearing lightweight bricks, an autoclave is required. The price of coal is high, polluting the environment, and there are problems of high energy consumption and high pollution. Compared with the current development of green building materials and green buildings, the country will face the trend of elimination.
In the current construction process, these problems are common in the construction of autoclaved aerated concrete blocks: cracking of gray joints, cracking of plastering layer, hollowing, leakage, and reduction of sound insulation.
In general, the advantages of steam-free foamed concrete blocks are more obvious, and the products are low-carbon, environmentally friendly, light, high-strength, sound-absorbing and shock-resistant. The advantages of the equipment are numerous. Compared with the steamed building block, the high temperature autoclaving process is reduced, and the cost is greatly reduced. Simple production, small investment, suitable small and medium investors or entrepreneurs, is very conducive to popularization.
The choice of steamed concrete blocks, although environmentally friendly, light weight, good performance, but the equipment production process is complex, large investment, not easy, slow return.
Second, the development of domestic foam concrete block equipment
Statistics from the National Development and Reform Commission show that during the “Twelfth Five-Year Plan†period, China will complete 1 billion square meters of new green buildings ; by the end of 2015 , 20% of new urban construction projects will meet the requirements of green building standards; During the period of the 2nd Five-Year Plan, the heating and metering and energy-saving renovation of existing residential buildings in the northern heating area will be more than 400 million square meters. In the hot summer and cold winter areas, the energy-saving renovation of existing residential buildings will be 50 million square meters, and the energy-saving renovation of public buildings and public institutions will be carried out. 120 million square meters, 400,000 sets of energy-saving demonstrations for rural dilapidated houses will be implemented . By the end of 2020 , the energy-saving renovation of urban residential buildings with transformational value in the northern heating areas will be basically completed. Therefore, industry experts predict that by the end of 2020 , China's building energy-saving renovation and new building insulation and energy-saving market space will total about 5 trillion yuan, which will bring huge market development opportunities for enterprises engaged in new materials.
Under the national policy of vigorously supporting and developing new wall materials such as foam concrete and domestic wall materials to the trend of energy conservation and environmental protection, enterprises engaged in the manufacture of foam concrete block equipment for waste energy conservation in China have mushroomed all over the country. From the north to the south, whether it is Beijing, Shandong, Hubei, or Guangdong, a large number of enterprises have joined the new wall materials industry, which has won a piece of cake. This has caused chaos in domestic foam concrete equipment and affected the health of the foam concrete industry. development of.
At present, most of the domestic foam concrete equipments are semi-automatic, but many enterprises have played an exaggerated publicity slogan of automatic and intelligent operation, which has caused many investors to suffer losses. For example, a boss in Sichuan who has been engaged in the building materials industry for many years has chosen the foam concrete block equipment of a company in Hubei. After putting into production, he found that the equipment uses hundreds of molds, and it takes several hours to demould, and the number of workers must not be increased. Production time can reach the output that you need, which greatly increases the cost. Another Shaanxi investor chose equipment from a company in Shandong Province and found that the equipment was dry-cutting. During the production process, a large amount of dust was generated, the corners of the blocks were easily damaged, and the produced waste could not be recycled better. With the use of (re-smashing the filter) , the device is semi-automatic and has not been used normally after half a year.
There are only a few companies in China that have real automation capabilities. What can be called a fully automatic foam concrete block equipment? Fully automated equipment must adopt an automated flow line operation mode, and it has the characteristics of using fewer people, easy operation, fast product production and high output. The process is divided into storage system, automatic metering system, constant temperature water supply system, mixing, curing and pumping intelligent system, pouring system, mold automatic circulation system, demoulding system, automatic cutting and packaging system; product assembly line packaging molding, 300-900 cubic meters per day to achieve automatic control of the production process, labor required for each production line 5--8 who take feeding device integration system greatly improves the production efficiency, shorten the production cycle.
Third, Guangzhou Oufu exclusive technology for the majority of small and medium investors to avoid steaming blocks new era
The speed of the setting of the foam concrete block has a great influence on the construction method and the progress of the project. Therefore, the setting of the setting time should be carried out to check whether it meets the requirements of concrete construction.
Guangzhou Oufu steam-free foam concrete block equipment is fully automatic intelligent operation, and is equipped with the only special initial kiln for cement foaming in China. The “pre-condensation kiln†kiln has the optimum temperature and humidity set according to the solidification characteristics of the cement. It is passed through the special initial setting process of constant temperature and steam in the initial setting kiln, and no other chemical agent is added to keep the product at constant temperature and humidity. The natural shrinkage and forming under the environment makes the physical properties of the cement reach the best solidification state, reduce the influence of the external environment, effectively prevent the shrinkage cracks of the block after drying, not only effectively guarantee the quality of the product but also achieve the demoulding of 8-10 minutes. The first company in China with rapid demolding capabilities.
After the foam concrete block is demoulded by the initial kiln, a new wet cutting process is adopted, the waste generation rate is small, and the waste can be recycled. The cut product is sent to the “autothermal cycle finished product maintenance kiln†for maintenance. The air in the kiln and the heat supplied to the kiln produce a magical atomization effect, and the moisturizing effect of the mist is more obvious. Since then, the cumbersome processes such as manual water spray maintenance have been reduced, which not only reduces the cost of the process, but also greatly prolongs the production time in winter, and at the same time makes the product quality more stable. The “autothermal cycle finished product maintenance kiln†developed and produced by Guangzhou Oufu is equipped on the insulation board equipment and block equipment. The kiln can be moved at any time according to the changes of the site and the production needs.
We know that every investor's funds are hard-won, and we are more aware of the urgent and cautious investment mood of every entrepreneur. Therefore, investors must do a good job in the early inspection work, and focus on the investigation and verification from the three aspects of the integrity, strength and service of the partners.
We choose Guangzhou Oufu Foam Concrete Block Equipment. Although we can't promise that your investment will be rich overnight, we can reassure you that investing in foam concrete block equipment is real, reliable, feasible and practical. Choosing a company with strength and experience is a successful guarantee for investors. If the partner does not have the production strength or the ability to innovate in technology, the investor will not be able to solve the technical problems after the purchase, and the service will not keep up. The ultimate victim is the investor. . To this end, Guangzhou Oufu Foam Concrete Block Equipment Research Institute experts specially remind investors: the purchase of foam concrete block equipment should focus on the quality of the equipment itself and after-sales service, and more importantly, whether the unit has equipment manufacturing capability. If the equipment is incapable of production, the equipment is faulty, and who is going to repair it? Who are you looking for when you change parts? Not to mention after-sales service. Therefore, it is especially reminded that the purchaser must go to the on-site inspection of a powerful manufacturer, and then decide whether to purchase it after considering all aspects of material selection, processing, assembly, inspection and equipment performance.
Investing in foam concrete blocks and aerated block production, Guangzhou Oufu steam-free foam concrete block equipment is your best choice. The steam-free foam concrete block is the future development trend of new wall materials.
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