Using industrial solid waste to produce high-performance composite ultra-fine powder technology:
In May 2018, the Building Materials Industry Technology Information Institute launched an ultra-fine ball mill with a production specific surface area of ??700m2/kg New technology of fly ash ore powder composite ultrafine powder.
This technology mainly innovatively designs and manufactures the ball mill lining plate, compartment plate, discharging device and grinding body, improves the movement trajectory of the grinding body and optimizes the entire grinding system. The grinding body of a traditional ball mill only moves radially. The grinding body of an ultra-fine ball mill designed according to this technology moves both radially and axially, which greatly improves the grinding efficiency. The one-time grinding time of materials is 1.5 times that of ordinary ball mills. During long-term continuous grinding operation, the internal temperature rise of the mill is small, the temperature of the materials leaving the mill is lower than 95°C, the fine powder is not easy to agglomerate, and the grinding fineness is easy to control.
The core advantages of this technology are reflected in:
1. Achieve ultra-fine and continuous production
This technology can achieve product ratio in industrialized continuous production operations. The surface area is more than 700m2/kg, the average particle size is less than 10 microns, and the sieve residue of 30μm square hole sieve can be controlled to less than 1%.
2. High output and low energy consumption
Take the common φ3.2×13m ball mill as an example. After being transformed by this technology, the open circuit grinding process is used to produce ultra-fine powder table. The output can reach 40t/h, and the annual production capacity is more than 250,000 tons/year;
Customized a special φ3.2×16m ultra-fine ball mill, using the open circuit grinding process to produce ultra-fine powder table, the output exceeds 60t/h , with an annual production capacity of more than 400,000 tons/year;
Using this technology to produce ultra-fine powder, the comprehensive power consumption per ton of product is as low as 32-42KWh.
3. Low investment, high profit
Taking a φ3.2×13m ball mill as an example, the material cost of grinding body, lining plate, discharging device and other materials required for ultra-fine transformation is about 250 RMB. The comprehensive production cost per ton of products is less than 40 yuan, and the profit per ton of products can be as high as 60-100 yuan. Generally, the entire investment can be recovered within 3-6 months.
4. Wide application range of materials
This technology is not only suitable for ultra-fine grinding of fly ash and mineral powder, but also can be used for steel slag powder, vanadium-titanium slag, and furnace bottom slag. and other various industrial wastes. The Building Materials Industry Technical Information Research Institute can scientifically compound industrial solid waste based on the solid waste resources in the customer's location and the performance characteristics of different materials, and then produce high-functional mineral admixtures for different uses through ultra-fine production.
5. Product diversification
Combining fly ash and mineral powder into ultra-fine form is a commonly used product form in this technology. This technology can also produce diversified products based on local raw material resources and market demand.
For example: For coal-fired power plants, ultrafine fly ash with a specific surface area of ??700m2/kg can be directly produced to directly replace cement in concrete. We can help companies determine the mix ratio of concrete. For circulating fluidized bed fly ash, this technology can reduce the water demand ratio by more than 10%.
For prefabricated component manufacturers, this technology can be used to produce high value-added products such as S120 grade mineral powder and autoclave-free admixtures.
Technical solution
1. Carry out technical transformation on the existing ordinary ball mill production line to realize the reuse of idle equipment; suitable for φ2.4×13m, φ2.6×13m, φ3 .2×13m ordinary ball mills of various specifications with aspect ratios greater than 4 can achieve ultra-fine grinding by modifying the internal lining plates, grinding bodies, compartment plates and discharging devices of ordinary ball mills, with small investment and quick results.
2. Customized φ3.2×16m ultra-fine ball mill and newly built ultra-fine grinding production line, with high output per unit, low overall cost, and extremely cost-effective.
The Building Materials Industry Technical Information Institute (formerly the National Building Materials Administration Technical Information Institute) is now affiliated with the State-owned Assets Supervision and Administration Commission of the State Council and one of the original 242 national-level scientific research institutes under the jurisdiction of the Ministry of Science and Technology. . The institute attaches great importance to scientific and technological research and development work oriented to the needs of enterprises and industries. It has well-equipped laboratories and professional and technical personnel. It has developed and reserved industrial solid waste building materials such as fly ash, desulfurization gypsum, steel slag, tailings, and coal gangue. Chemical utilization technology, as well as special cement, concrete admixtures, foam concrete and many other technologies. Among them, ultra-fine grinding technology has been rapidly promoted and industrialized across the country, creating good economic benefits for enterprises.