Steel ladles are indispensable core equipment in the steelmaking process, undertaking the critical tasks of carrying, transporting, and refining molten steel at temperatures above 1600°C. They are constantly exposed to high temperatures, molten steel erosion, and slag corrosion, making the working conditions extremely harsh. As the core protective layer of the inner wall of steel ladles, the quality of steel ladle lining bricks directly determines the service life of the ladle, the safety of steelmaking, and the purity of molten steel. It is also an important indicator of the quality of metallurgical refractory materials and the level of steelmaking.
Steel ladle lining bricks are mostly special refractory materials such as magnesia-carbon bricks, alumina-magnesia-carbon bricks, high alumina bricks, and spinel bricks. They have precise raw material ratios and extremely high forming difficulties, with strict requirements for the uniformity of density, overall density, dimensional accuracy, and defect-free nature of the green body. Traditional forming equipment has coarse pressure control, uneven force application, and poor process adaptability, which easily leads to density deviations, internal cracks, edge and corner defects, and delamination and porosity in the green body. This results in substandard erosion resistance, thermal shock resistance, and erosion resistance of the lining bricks, short service life, frequent replacements, and significantly increased production costs for metallurgical enterprises.
Zhengzhou Haloong focuses on the entire production process of steel ladle lining bricks, deeply integrating servo control, static pressure transmission, and intelligent numerical control technologies to optimize the equipment, ensuring that each servo screw press can perfectly meet the forming requirements of lining bricks. With its solid strength, it solves industry pain points and lays a solid foundation for the quality of steel ladle refractory materials.
The equipment is equipped with a permanent magnet synchronous servo motor direct drive system, completely eliminating the traditional friction transmission structure. The transmission chain is shorter, with zero energy loss in energy transmission, and stable pressure output without fluctuations. It is equipped with a dedicated numerical control pressure control module, allowing digital and precise setting of striking energy, pressurization speed, pressurization times, and pressure holding duration. The energy repetition accuracy is ≤±1%, ensuring that each press is of the same force.
In response to the characteristics of steel ladle lining bricks, a customized stepwise flexible pressurization process is adopted. It starts with light pressure for air exhaust, then gradually increases pressure, and finally maintains pressure for a long time to shape. This completely eliminates the internal air in the green body, preventing delamination and porosity. The density of the green body is highly uniform from the center to the edges and from the surface to the interior, with a density variation coefficient far exceeding industry standards, significantly improving the density and compressive strength of the lining bricks.
It adopts a fully enclosed static pressure screw, nut, and heavy-duty bearing transmission structure. During operation, a high-pressure oil film buffer is formed to achieve flexible and uniform force application, completely avoiding the stress concentration and structural damage caused by traditional rigid impact. The pressurization process is smooth and gentle, ensuring that the green body is fully compacted while protecting the brittle green body, eliminating microcracks, edge and corner defects, and deformation. The product qualification rate is increased to over 99%, minimizing raw material waste.
It breaks through the structural limitations of traditional equipment with fixed bottom dead centers and adopts a sequential forging forming mode. The stroke of the slider, pressurization depth, and pressurization force can be flexibly adjusted, perfectly adapting to the production of all types of steel ladle lining bricks, including magnesia-carbon bricks, alumina-magnesia-carbon bricks, high alumina bricks, slag line bricks, and special-shaped lining bricks. Whether it is conventional sizes or special-shaped parts, it can precisely apply pressure and uniformly form. Combined with a rapid mold change system, product switching is efficient and convenient, suitable for flexible production of multiple varieties.
The equipment is equipped with a dedicated process database for steel ladle lining bricks, collecting the optimal forming parameters for various materials and specifications of lining bricks. Operators can retrieve them with a single click, eliminating the need for repeated trial runs and adjustments. All parameters can be permanently saved and reused in batches, completely eliminating the reliance on manual experience. This ensures that the density, size, and strength of each batch and each lining brick green body are highly uniform, easily meeting the quality requirements of high-end metallurgical projects at home and abroad.
It adopts a servo motor on-demand start-stop and sleep energy-saving mode, operating only during the pressing process and consuming zero energy in standby mode. The comprehensive energy-saving rate is over 55%, significantly reducing electricity costs. The static pressure transmission structure has minimal wear and tear, and when combined with a fully automatic forced lubrication system, the equipment has an extremely low failure rate and a service life far exceeding that of traditional equipment. The later maintenance and operation costs are reduced by more than 40%, making long-term operation more worry-free.
The equipment is equipped with standard industrial communication interfaces, allowing seamless integration with automatic feeding, precise material distribution, intelligent demolding, and green body inspection equipment, to build a fully automated and intelligent production line for steel ladle lining bricks, achieving unmanned operation throughout the process from material distribution to finished product transfer, further enhancing production efficiency and forming accuracy. It also supports remote monitoring, fault early warning, and data traceability, facilitating real-time production control by enterprises and aligning with the global trend of intelligent transformation in the refractory materials industry.
As a leading enterprise in domestic servo screw press technology, Zhengzhou Haloong has been dedicated to the research and development and manufacturing of refractory material forming equipment for 45 years. Always customer-oriented and innovation-driven, it offers a HLDS series of servo screw presses covering the full tonnage range from 200T to 1600T. According to the material, specifications, and production capacity requirements of customers' steel ladle lining bricks, it provides one-to-one customized solutions, fully meeting the mass production needs of large, medium, and small refractory material enterprises.