The core competitiveness of magnesia olivine bricks lies in their comprehensive properties of "corrosion resistance, thermal shock resistance, and high strength", which are entirely dependent on precise control during the forming stage. The forming process must meet six core requirements: uniform density, dense structure, no cracks, intact edges and corners, precise dimensions, and a solid foundation for resisting hydration. It is necessary to ensure uniform density throughout the body to maintain a stable bulk density of the finished product, control the apparent porosity within a reasonable range, and lay a solid foundation for subsequent high-temperature sintering, thereby enhancing the product's resistance to slag erosion and thermal shock. At the same time, the pressing speed and holding time must be precisely controlled to accommodate the high hardness of magnesia olivine raw materials, poor fluidity of the mixture, and difficulty in venting. This prevents residual pores within the body from causing structural failure during high-temperature service. Additionally, the forming pressure requirements for different specifications and applications of magnesia olivine bricks must be precisely matched to avoid cracking due to over-pressing or porosity due to under-pressing. Currently, the technical shortcomings of traditional forming equipment have led to common problems in magnesia olivine brick production, such as uneven body density, excessive porosity, damaged edges and corners, large dimensional deviations, and low product qualification rates, severely restricting the industrialization of high-end magnesia olivine 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 in the forming of magnesia olivine bricks and creating dedicated forming equipment. With the core advantages of precise pressure control, stable pressure transmission, and intelligent adaptability, it has established a benchmark for high-end magnesia olivine brick quality.

Compared to ordinary refractory bricks, the forming of magnesia olivine bricks is significantly more challenging due to the special nature of the raw materials and the strict forming process. The mixture for magnesia olivine bricks is centered around magnesia olivine particles, combined with magnesia sand, dolomite, and other modifying additives. The raw materials are hard, with weak inter-particle bonding, and the mixture has poor fluidity and difficulty in venting during the forming process. Precise control of the pressing force, speed, and rhythm is required during forming to achieve densification of the body while avoiding cracking and edge damage. Moreover, magnesia olivine bricks come in various specifications, from converter lining bricks and ladle bricks in the steel industry to rotary kiln lining bricks and glass melting furnace bricks in the cement and glass industries. The forming pressure, pressing speed, and holding time for different types of products vary significantly, placing extremely high demands on the equipment's process adaptability.

Zhengzhou Haloong has deeply studied the raw material characteristics, forming process logic, and industry upgrade needs of magnesia olivine 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. The advantages precisely match the three forming requirements of "uniformity + density + crack resistance" for magnesia olivine bricks, making it the preferred equipment for mass production of high-quality magnesia olivine bricks and assisting refractory material enterprises in creating high-quality products suitable for high-temperature, strong erosion, and strong thermal shock conditions, seizing the opportunity in the high-end market.

Equipped with a core permanent magnet synchronous servo motor direct drive system, it completely eliminates traditional low-efficiency transmission structures such as 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 a magnesia olivine brick-specific CNC pressure control module independently developed by Haloong, 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 forming pressure is highly consistent in each process, completely eliminating quality deviations caused by manual operation and mechanical fluctuations. In response to the high hardness of magnesio-olivine raw materials and the difficulty in exhausting air from the mixture, a stepwise pressurization process of "light pressure exhaust - slow pressure densification - long-term pressure holding" was customized. Firstly, the raw materials are lightly pressed to loosen them and slowly exhaust the residual air inside. Then, the pressure is gradually increased in steps to compact the material layer by layer (the pressure increases slowly to avoid impact). Finally, the pressure is held for a long time to shape the product. This process ensures that all parts of the green body, including the center, edges, and corners, are uniformly stressed, with the density fluctuation controlled within a very small range. It also guarantees a dense structure of the green body and a reasonable open porosity, providing a solid foundation for subsequent high-temperature sintering, and increases the qualified product rate to over 99%.

The equipment 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 slow pressurization. This completely avoids the severe impact force and stress concentration caused by traditional rigid pressurization. The pressurization process is smooth and gentle, with uniform and soft pressure transmission. It can fully exhaust the internal pores of the green body, ensuring its density and completely eliminating defects such as porosity, delamination, and micro-cracks. At the same time, it avoids the cracking and edge damage of the green body caused by rigid impact, significantly reduces the waste of high-cost raw materials, effectively extends the service life of the mold, reduces material costs, and improves the production efficiency of the enterprise, solving the core pain point of traditional equipment, which is "high cracking rate and high scrap rate".

Breaking through the structural limitation of the fixed bottom dead center of traditional equipment, a step-by-step forging forming mode is adopted. According to the material, size, structural complexity (irregular structural parts, lining bricks, furnace bottom bricks), density requirements, and raw material ratio (different particle sizes) of magnesio-olivine bricks, the stroke of the slider, the depth of pressurization, and the applied pressure can be flexibly adjusted to precisely match the forming requirements of various magnesio-olivine bricks, covering the full range of production scenarios for high-end magnesio-olivine bricks. There is no need to worry about the problems of uneven pressurization or cracking of the green body caused by deviations in raw material filling, differences in particle sizes, and changes in the fluidity of the mixture. Combined with a rapid mold change system, the mold change is convenient and efficient, perfectly adapting to the flexible mode of multi-variety and batch production, meeting the batch supply needs of high-end fields such as steel, cement, and glass, and accommodating the forming requirements of both ordinary lining bricks and high-strength corrosion-resistant bricks.

The equipment is equipped with a dedicated forming parameter database for magnesio-olivine bricks, integrating the optimal forming process parameters for various specifications, different raw material ratios, different particle sizes, and different density requirements of magnesio-olivine bricks. It covers the forming parameters of common products such as standard magnesio-olivine lining bricks, irregular corrosion-resistant bricks, and high-strength magnesio-olivine bricks. Operators can retrieve them with one click, eliminating the need for repeated debugging and exploration, and 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, and dimensional accuracy of each batch and each product are highly consistent, with no cracking or damage to the green body, easily meeting the strict quality requirements of high-end fields at home and abroad, and helping enterprises smoothly open up the overseas high-end magnesio-olivine brick 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 magnesio-olivine brick production and meeting the green and low-carbon development needs of the refractory 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 failure rate and a service life far exceeding that of traditional equipment. The later maintenance cost is reduced by more than 40%, comprehensively compressing production, maintenance, and material costs, helping enterprises achieve a green, low-carbon, and efficient profit-making production model, and solving the pain points of traditional forming equipment, which are "high energy consumption and complex maintenance". The equipment is equipped with standardized industrial communication interfaces, which can be seamlessly integrated with automatic and precise feeding machines, closed-loop distribution machines, intelligent demolding machines, non-destructive testing equipment for green bodies, and constant-temperature conveying lines to build a fully automatic and intelligent production line for magnesia-chrome bricks. This enables unmanned control throughout the entire process from distribution, pressing, pressure holding, demolding to green body transfer and inspection, minimizing human intervention. It not only avoids damage to green bodies caused by manual operation and reduces the risk of cracking but also ensures the 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 in real-time control the production progress and product quality. It fully conforms to the global trend of intelligent, digital, and green transformation in the refractory materials industry, helping enterprises build high-end magnesia-chrome brick intelligent production bases and enhance large-scale mass production capabilities.

Zhengzhou Haloong Machinery Co., Ltd., as a leading enterprise in the domestic electric servo screw press field, has been focusing on technological innovation in refractory forming equipment for 45 years. It has been deeply engaged in solving the forming process pain points of high-end alkaline refractory materials such as magnesia-chrome bricks and has been committed to empowering industrial upgrading with customized technologies. The Haloong HLDS series of CNC servo screw presses cover the full tonnage range from 200T to 1600T. According to the customer's requirements for magnesia-chrome brick material, specifications, production capacity, density, and raw material ratio (particle size distribution), it can provide one-to-one customized forming solutions, fully meeting the mass production needs of various magnesia-chrome bricks and adapting to the supply of refractory materials in different high-temperature, strong erosion, and strong thermal shock fields. It solves the problems of low efficiency and uneven density in traditional vibration forming.