In energy production scenarios such as thermal power plants and waste incineration power plants, the desulfurization system is a key link in controlling pollutant emissions and achieving environmental protection standards. The desulfurization ball mill is the core equipment for grinding desulfurizers such as limestone into qualified slurry. Its stable operation directly affects the desulfurization efficiency and environmental protection indicators. Among them, the desulfurization ball mill lining, as the "first protective barrier" inside the equipment, not only has to withstand the high-frequency impact and grinding of the material, but also has to resist the long-term corrosion of acid and alkali slurry. Its performance is directly related to the equipment life, operation and maintenance costs and desulfurization effect.
Desulfurization ball mill lining: special working conditions, more stringent requirements
Compared with ordinary ball mills, the working environment of power plant desulfurization ball mills has significant special features:
Prominent corrosive environment: the grinding material is limestone slurry or desulfurization gypsum slurry, the pH value is low, and long-term operation is prone to corrosion of metal parts inside the equipment;
High grinding intensity: limestone has a high hardness and needs to be ground to an ultra-fine particle size of 80-90% passing through a 200-mesh sieve. The lining needs to withstand continuous impact and friction;
High requirements for operating continuity: the shutdown of the desulfurization system will directly affect the emission standards of the power plant. The liner plate needs to have a long life and reduce unplanned shutdown maintenance.
Therefore, the desulfurization ball mill lining must meet the three core requirements of "high wear resistance", "strong corrosion resistance" and "strong adaptability" at the same time to ensure the stable supply of desulfurization slurry and grinding quality.
The core advantages of high-quality desulfurization linings: comprehensive upgrades from materials to design
1. Material selection: dual balance of wear resistance and corrosion resistance
At present, the mainstream material of the desulfurization ball mill lining in power plants has achieved performance breakthroughs through technologies such as "alloy strengthening" and "composite protection":
High chromium cast iron lining: By adjusting the proportion of alloy elements such as chromium and molybdenum, a hard carbide structure is formed, and the wear resistance is improved by more than 30% compared with ordinary high manganese steel. At the same time, corrosion-resistant elements are added to improve the acid and alkali resistance, which is suitable for the coarse grinding stage of limestone;
Rubber composite lining: With natural rubber as the base material, the surface is vulcanized to form an anti-corrosion layer. The elastic properties can absorb part of the impact energy and reduce the hard wear of the material on the lining. It is more suitable for gypsum slurry fine grinding scenes and can reduce grinding noise;
Bimetallic composite lining: The base layer uses high-strength steel to ensure structural support, and the working surface is covered with a high-wear-resistant alloy layer, taking into account both impact resistance and corrosion resistance, and is suitable for large-capacity desulfurization ball mills.
2. Structural design: adapt to working conditions and reduce potential faults
High-quality linings not only rely on materials, but also need to be optimized by design to adapt to desulfurization scenarios:
Anti-blocking arc design: The surface of the lining adopts a streamlined arc to reduce the retention and accumulation of slurry during the grinding process, and avoid the reduction of grinding efficiency due to scaling;
Modular splicing structure: The lining specifications are customized according to the size of the ball mill cylinder, and the splicing gap is small to reduce material jamming, while facilitating local replacement and reducing maintenance costs;
Anti-corrosion coating support: Some lining surfaces are additionally sprayed with ceramic or epoxy resin coatings to form a "physical isolation barrier" to further enhance the ability to resist slurry corrosion and extend service life.
The actual value of choosing the right liner: cost reduction and efficiency improvement + environmental protection compliance
For power plants, the value brought by high-quality desulfurization ball mill liner is reflected in the optimization of cost and improvement of environmental protection benefits throughout the life cycle:
Extend equipment life and reduce downtime: Wear-resistant and anti-corrosion liner can extend the replacement cycle from 3-6 months of traditional liner to 12-18 months, reduce downtime and maintenance caused by liner wear, and save more than 20% of maintenance man-hours each year;
Stabilize grinding quality and ensure desulfurization efficiency: The liner has uniform wear resistance, which can ensure that the slurry fineness is stable within the design range (such as 90% passing through a 325 mesh sieve), avoid the decrease in desulfurization efficiency caused by particle size fluctuations, and ensure that flue gas emissions meet standards;
Reduce comprehensive energy consumption: The liner with strong adaptability can reduce the ineffective friction between the material and the liner, reduce the operating current of the ball mill, indirectly achieve energy savings, and reduce the solid waste treatment costs caused by liner replacement.
How to choose the appropriate desulfurization ball mill lining?
When purchasing desulfurization ball mill lining, power plants need to "accurately select" according to their own working conditions:
Clearly define the characteristics of the grinding material: high chromium cast iron lining is preferred for limestone coarse grinding, and rubber composite lining can be considered for gypsum fine grinding;
Match equipment parameters: According to the ball mill model, cylinder speed, grinding medium filling rate and other parameters, select the lining with corresponding thickness and curvature to avoid abnormal operation due to size mismatch;
Pay attention to the manufacturer's technical strength: give priority to manufacturers with customization capabilities, and adjust the material formula and structural design according to the actual working conditions of the power plant desulfurization system (such as slurry concentration, temperature, and corrosiveness) to ensure maximum performance of the lining.
Conclusion
Today, with increasingly stringent environmental protection requirements, the stable operation of the desulfurization system is the basis for the sustainable development of power plants. Although the desulfurization ball mill liner plate is an "accessory", it plays a core role in ensuring grinding efficiency and reducing operation and maintenance costs. Choosing high-quality linings that are both wear-resistant and corrosion-resistant can not only extend the life of the equipment, but also provide solid support for the power plant to meet environmental protection standards and reduce costs and increase efficiency. In the future, with the advancement of material technology, desulfurization linings will be upgraded to "more wear-resistant, more corrosion-resistant, and more intelligent" to protect green energy production.
Email: cast@ebcastings.com
In energy production scenarios such as thermal power plants and waste incineration power plants, the desulfurization system is a key link in controlling pollutant emissions and achieving environmental protection standards. The desulfurization ball mill is the core equipment for grinding desulfurizers such as limestone into qualified slurry. Its stable operation directly affects the desulfurization efficiency and environmental protection indicators. Among them, the desulfurization ball mill lining, as the "first protective barrier" inside the equipment, not only has to withstand the high-frequency impact and grinding of the material, but also has to resist the long-term corrosion of acid and alkali slurry. Its performance is directly related to the equipment life, operation and maintenance costs and desulfurization effect.
Desulfurization ball mill lining: special working conditions, more stringent requirements
Compared with ordinary ball mills, the working environment of power plant desulfurization ball mills has significant special features:
Prominent corrosive environment: the grinding material is limestone slurry or desulfurization gypsum slurry, the pH value is low, and long-term operation is prone to corrosion of metal parts inside the equipment;
High grinding intensity: limestone has a high hardness and needs to be ground to an ultra-fine particle size of 80-90% passing through a 200-mesh sieve. The lining needs to withstand continuous impact and friction;
High requirements for operating continuity: the shutdown of the desulfurization system will directly affect the emission standards of the power plant. The liner plate needs to have a long life and reduce unplanned shutdown maintenance.
Therefore, the desulfurization ball mill lining must meet the three core requirements of "high wear resistance", "strong corrosion resistance" and "strong adaptability" at the same time to ensure the stable supply of desulfurization slurry and grinding quality.
The core advantages of high-quality desulfurization linings: comprehensive upgrades from materials to design
1. Material selection: dual balance of wear resistance and corrosion resistance
At present, the mainstream material of the desulfurization ball mill lining in power plants has achieved performance breakthroughs through technologies such as "alloy strengthening" and "composite protection":
High chromium cast iron lining: By adjusting the proportion of alloy elements such as chromium and molybdenum, a hard carbide structure is formed, and the wear resistance is improved by more than 30% compared with ordinary high manganese steel. At the same time, corrosion-resistant elements are added to improve the acid and alkali resistance, which is suitable for the coarse grinding stage of limestone;
Rubber composite lining: With natural rubber as the base material, the surface is vulcanized to form an anti-corrosion layer. The elastic properties can absorb part of the impact energy and reduce the hard wear of the material on the lining. It is more suitable for gypsum slurry fine grinding scenes and can reduce grinding noise;
Bimetallic composite lining: The base layer uses high-strength steel to ensure structural support, and the working surface is covered with a high-wear-resistant alloy layer, taking into account both impact resistance and corrosion resistance, and is suitable for large-capacity desulfurization ball mills.
2. Structural design: adapt to working conditions and reduce potential faults
High-quality linings not only rely on materials, but also need to be optimized by design to adapt to desulfurization scenarios:
Anti-blocking arc design: The surface of the lining adopts a streamlined arc to reduce the retention and accumulation of slurry during the grinding process, and avoid the reduction of grinding efficiency due to scaling;
Modular splicing structure: The lining specifications are customized according to the size of the ball mill cylinder, and the splicing gap is small to reduce material jamming, while facilitating local replacement and reducing maintenance costs;
Anti-corrosion coating support: Some lining surfaces are additionally sprayed with ceramic or epoxy resin coatings to form a "physical isolation barrier" to further enhance the ability to resist slurry corrosion and extend service life.
The actual value of choosing the right liner: cost reduction and efficiency improvement + environmental protection compliance
For power plants, the value brought by high-quality desulfurization ball mill liner is reflected in the optimization of cost and improvement of environmental protection benefits throughout the life cycle:
Extend equipment life and reduce downtime: Wear-resistant and anti-corrosion liner can extend the replacement cycle from 3-6 months of traditional liner to 12-18 months, reduce downtime and maintenance caused by liner wear, and save more than 20% of maintenance man-hours each year;
Stabilize grinding quality and ensure desulfurization efficiency: The liner has uniform wear resistance, which can ensure that the slurry fineness is stable within the design range (such as 90% passing through a 325 mesh sieve), avoid the decrease in desulfurization efficiency caused by particle size fluctuations, and ensure that flue gas emissions meet standards;
Reduce comprehensive energy consumption: The liner with strong adaptability can reduce the ineffective friction between the material and the liner, reduce the operating current of the ball mill, indirectly achieve energy savings, and reduce the solid waste treatment costs caused by liner replacement.
How to choose the appropriate desulfurization ball mill lining?
When purchasing desulfurization ball mill lining, power plants need to "accurately select" according to their own working conditions:
Clearly define the characteristics of the grinding material: high chromium cast iron lining is preferred for limestone coarse grinding, and rubber composite lining can be considered for gypsum fine grinding;
Match equipment parameters: According to the ball mill model, cylinder speed, grinding medium filling rate and other parameters, select the lining with corresponding thickness and curvature to avoid abnormal operation due to size mismatch;
Pay attention to the manufacturer's technical strength: give priority to manufacturers with customization capabilities, and adjust the material formula and structural design according to the actual working conditions of the power plant desulfurization system (such as slurry concentration, temperature, and corrosiveness) to ensure maximum performance of the lining.
Conclusion
Today, with increasingly stringent environmental protection requirements, the stable operation of the desulfurization system is the basis for the sustainable development of power plants. Although the desulfurization ball mill liner plate is an "accessory", it plays a core role in ensuring grinding efficiency and reducing operation and maintenance costs. Choosing high-quality linings that are both wear-resistant and corrosion-resistant can not only extend the life of the equipment, but also provide solid support for the power plant to meet environmental protection standards and reduce costs and increase efficiency. In the future, with the advancement of material technology, desulfurization linings will be upgraded to "more wear-resistant, more corrosion-resistant, and more intelligent" to protect green energy production.
Email: cast@ebcastings.com
