Chrome corundum bricks are made from fused white corundum and chromite (or chromium oxide) as the main raw materials, combined with corundum fine powder, silica fume and other auxiliary materials, and special high-temperature binders. The forming process must take into account "high density, high density uniformity, uniform composition and structural integrity" - ensuring uniform density throughout the body, ensuring the finished product's compressive strength meets standards, with reasonable pore distribution and small pore size, while avoiding the breakage of chrome corundum particles and microcracks in the body during the pressing process, and preventing the stratification and segregation of the mixture to ensure the product's resistance to slag erosion, thermal shock and wear resistance during high-temperature service. Currently, the technical shortcomings of traditional forming equipment have led to common problems in the production of chrome corundum bricks, such as uneven density, body cracking, composition segregation, low product qualification rate, and unstable batch quality, seriously restricting the industrial development of high-end chrome corundum bricks. Zhengzhou Haloong, relying on the third-generation permanent magnet synchronous servo direct drive core technology, has upgraded the HLDS series of CNC servo screw presses, specifically addressing the pain points of chrome corundum brick forming, creating dedicated forming equipment. With the core advantages of precise pressure control, flexible pressure transmission, and intelligent adaptation, it sets a new benchmark for high-end chrome corundum brick quality.

Compared to ordinary refractory bricks, the forming of chrome corundum bricks is significantly more challenging. The raw materials of chrome corundum bricks have high hardness, sharp edges, and large density differences, and the mixture has poor fluidity, a wide particle size range, and is prone to stratification and segregation. The requirements for the accuracy of applied pressure, pressing speed, and holding time are extremely high - it is necessary to achieve densification of the body through precise pressing, ensuring the finished product's compressive strength is ≥80MPa and the volume density is controlled at 3.0-3.3g/cm³, while avoiding the breakage of chrome corundum particles and microcracks in the body due to rigid impact, and precisely controlling the pore distribution to prevent raw material stratification and segregation, ensuring the product's resistance to slag erosion and thermal shock.

Zhengzhou Haloong has deeply studied the raw material characteristics, forming process logic, and industry upgrade demands of chrome corundum bricks. With the core technology of permanent magnet synchronous servo motor direct drive + static pressure flexible pressure transmission + intelligent CNC system, it has specifically optimized the HLDS series of servo screw presses, comprehensively upgrading the equipment's precision, stability, and adaptability, precisely matching the forming requirements of chrome corundum bricks. It has become the preferred equipment for high-quality chrome corundum brick mass production, assisting refractory material enterprises in creating high-quality products suitable for high-temperature applications.

Equipped with a permanent magnet synchronous servo motor direct drive system, it completely eliminates the inefficient transmission structures such as traditional friction discs and clutches, with an extremely short transmission chain and zero energy loss in energy transmission. The pressure output is fully stable and controllable throughout the process. The equipment is equipped with Haloong's self-developed dedicated CNC pressure control module for chrome corundum bricks, which can digitally and precisely set the impact energy, pressing speed, stepwise pressing times, and holding time. The energy repetition control accuracy is ≤±1%, ensuring that the pressure in each forming process is highly consistent, completely eliminating quality deviations caused by manual operation and mechanical fluctuations. In response to the characteristics of poor fluidity, easy stratification and segregation, and hard particles of the chrome corundum mixture, a customized stepwise flexible pressing process is adopted. First, light pressure is applied to disperse the raw material agglomerates and quickly expel the residual air inside the body, then stepwise stable pressure is applied to compact the body layer by layer, and finally, long-term holding pressure is applied to shape the body. This ensures uniform force on all parts of the body, including the center, edges, and corners, with density fluctuations controlled within a very small range. At the same time, it effectively suppresses raw material stratification and segregation, ensuring uniform composition. It not only ensures the body's density but also avoids the breakage of chrome corundum particles, perfectly balancing the core advantages of high strength, slag resistance, and thermal shock resistance of the product, with the product qualification rate increasing to over 99%.

It adopts a fully enclosed static pressure screw, nut, and dedicated heavy-duty bearing transmission structure. During operation, a stable high-pressure oil film is formed for protection, achieving flexible and uniform pressure application and completely avoiding the severe impact force and stress concentration problems caused by traditional rigid pressing. The pressurization process is smooth and gentle, with uniform and soft pressure transmission. It can fully expel the internal pores of the blank, disperse the agglomerated raw materials, and completely eliminate defects such as porosity, delamination, and cracks. At the same time, it can protect the structure of the chrome corundum particles gently, avoiding particle breakage and blank cracking, significantly reducing the waste of high-cost raw materials. It also effectively extends the service life of the mold, reduces material costs, and enhances the production efficiency of the enterprise.

It breaks through the structural limitations of the fixed bottom dead center of traditional equipment and adopts a step-by-step forging forming mode. According to the material, size, structural complexity (standard brick, special-shaped brick), density, and composition requirements of the chrome corundum brick, it can flexibly adjust the stroke of the slider, the depth of pressurization, and the pressure intensity, precisely matching the forming requirements of various chrome corundum bricks, covering the full production scenarios of high-end refractory materials. There is no need to worry about the deviation of raw material filling, the difference in chrome corundum particle size, and the layering of the mixture causing uneven pressurization. Combined with a rapid mold changing system, the mold changing is convenient and efficient, perfectly adapting to the flexible mode of multi-variety and batch production, meeting the batch supply requirements of the high-end field.

The equipment is equipped with a dedicated forming parameter database for chrome corundum bricks, integrating the optimal forming process parameters for various specifications, different chromium contents, and different density requirements of chrome corundum bricks, covering the forming parameters of common products such as ordinary dense type, high-strength slag-resistant type, and special-shaped chrome corundum bricks. Operators can retrieve them with one click, without the need for repeated debugging and exploration, significantly reducing the interference of human factors on product quality. All forming parameters can be permanently saved and reused in batches, ensuring that the density, compactness, composition uniformity, and dimensional accuracy of each batch and each product are highly consistent, easily meeting the strict quality requirements of the high-end field at home and abroad, helping enterprises smoothly open up the overseas high-end refractory materials market.

Compared with traditional friction presses, the Haloong servo screw press adopts an intelligent mode of on-demand start-stop and sleep energy saving. The servo motor only operates during the pressing process, and the standby state is completely zero energy consumption, with a comprehensive energy-saving rate of over 55%, significantly reducing the electricity cost of chrome corundum brick production, meeting the green and low-carbon development needs of the refractory materials industry. At the same time, the static pressure transmission structure has minimal wear, combined with a fully automatic forced lubrication system and an oil shortage alarm device, achieving maintenance-free operation, with a low equipment failure rate and a service life far exceeding that of traditional equipment. The later operation and maintenance costs are reduced by more than 40%, comprehensively compressing production, operation and maintenance, and material costs, helping enterprises achieve a green, low-carbon, and efficient profit-making production model.

The equipment is equipped with standardized industrial communication interfaces, which can be seamlessly linked with automatic and precise feeding machines, closed-loop distribution machines, intelligent demolding machines, non-destructive testing equipment for blanks, and constant temperature conveyor lines, building a fully automatic and intelligent forming production line for chrome corundum bricks, achieving unmanned control throughout the process from distribution, pressing, pressure holding, demolding to blank transfer and testing, minimizing human intervention. It not only avoids damage to the blank caused by manual operation but also ensures forming accuracy and production efficiency. At the same time, it supports remote monitoring, parameter adjustment, fault warning, and production data traceability functions, facilitating domestic and foreign customers to remotely and real-time control the production progress and product quality, fully conforming to the global refractory materials industry's trend of intelligent, digital, and green transformation, helping enterprises build an intelligent production base for high-end chrome corundum bricks.

As a leading enterprise in the domestic electric servo screw press field, Zhengzhou Haloong Machinery Co., Ltd. has been focusing on the technological innovation of refractory material forming equipment for 45 years, deeply exploring the forming process pain points of high-end refractory materials such as chrome corundum bricks, and insisting on customizing technology to empower the upgrading of the refractory materials industry. The Haloong HLDS series CNC servo screw press covers the full tonnage range from 200T to 1600T, and can provide one-to-one customized forming solutions based on the material, size, capacity, density, and chromium content requirements of the customer's chrome corundum bricks, fully meeting the mass production needs of various chrome corundum bricks and adapting to the supply of refractory materials in different high-end high-temperature fields.