As a core thermal energy equipment in the metallurgy, chemical, and building materials industries, hot blast stoves undertake the crucial mission of high-temperature heat exchange and energy recovery. The hot blast stove bricks used in the inner lining of the stoves are exposed to high temperatures ranging from 800 to 1200°C for long periods and are subject to multiple tests including thermal shock, gas flow erosion, and chemical corrosion. They are the core refractory materials that ensure the efficient, stable, and long-term operation of hot blast stoves. The quality of hot blast stove bricks directly affects the heat exchange efficiency, heat loss control, and service life of the stoves. The uniformity of the body density, porosity, and thermal shock resistance are the core indicators for evaluating the quality of hot blast stove bricks. Currently, the technical limitations of traditional forming equipment often lead to problems such as uneven density, high-temperature cracking, and peeling and damage of hot blast stove bricks, making it difficult to meet the modern requirements of high efficiency, energy conservation, and long-term stability of hot blast stoves. Zhengzhou Haloong Machinery Co., Ltd. has been deeply engaged in the field of refractory material forming equipment for 45 years. Based on the raw material characteristics and forming process pain points of hot blast stove bricks, it has innovated the technology of servo screw presses to create dedicated forming equipment for hot blast stove bricks, using the core advantages of the equipment to produce high-quality hot blast stove bricks and providing a full-process precise forming solution for global refractory material enterprises.

The forming quality of hot blast stove bricks directly determines their high-temperature stability, thermal shock resistance, and service life. The raw materials are mostly high-alumina bauxite, silica, clay, and other refractory aggregates and fine powders, mixed with binders. The mixture has poor fluidity and a complex particle size distribution. Moreover, hot blast stove bricks have extremely high requirements for the accuracy of applied pressure, pressure application speed, and holding time - it is necessary to ensure uniform density throughout the body, reduce porosity, resist high-temperature gas flow erosion, and avoid hidden defects during the forming process to ensure no cracking or peeling at high temperatures.

Zhengzhou Haloong has deeply studied the raw material characteristics, forming process logic, and industry upgrade demands of hot blast stove bricks. With the core technology of direct drive by permanent magnet synchronous servo motor + static pressure flexible pressure transmission + intelligent numerical control system, it has specially optimized the HLDS series of servo screw presses, comprehensively upgrading the equipment's precision, stability, and adaptability, precisely solving the forming problems of hot blast stove bricks, and becoming the preferred equipment for mass production of high-quality hot blast stove bricks, assisting refractory material enterprises in creating high-end products suitable for extreme high-temperature working conditions.

Equipped with a direct drive system of permanent magnet synchronous servo motors, 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 a dedicated numerical control pressure control module for hot blast stove bricks independently developed by Haloong, which can digitally and precisely set the striking energy, pressure application speed, stepwise pressure application times, and holding time. The energy repetition control accuracy is ≤±1%, ensuring that the pressure in each forming process is highly consistent, completely eliminating the quality deviations caused by manual operation and mechanical fluctuations. In response to the poor fluidity and easy agglomeration of the hot blast stove brick mixture, a customized stepwise flexible pressure application process is adopted. First, light pressure is applied to quickly expel the residual air inside the body, then stepwise stable pressure is applied to gradually compact the layers, and finally, long-term holding pressure is applied for shaping. This ensures uniform force application in all parts of the body, including the center, edges, and corners, with density fluctuations controlled within a very small range. The density variation coefficient is far superior to industry standards, perfectly ensuring the uniform density and compactness of the entire body, significantly enhancing the thermal shock resistance, wear resistance, and high-temperature stability of the finished product, extending the service life of hot blast stove bricks, and reducing the operation and maintenance costs of terminal enterprises.

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 pressure application. The pressurization process is smooth and gentle, which can not only fully expel the internal pores of the green body, completely eliminate the defects of porosity and delamination, but also protect the fragile structure of the green body in a mild way, avoiding edge and corner damage and internal micro-cracks. This increases the product qualification rate to over 99%, significantly reduces the waste of high-cost raw materials, and effectively extends the service life of the mold, lowers the cost of consumables, and enhances the production efficiency of the enterprise.

It breaks through the structural limitation of the fixed bottom dead center of traditional equipment and adopts a step-by-step forging forming mode. According to the material (high alumina, silica, clay), size, and structural complexity (standard brick, special-shaped brick, checker brick) of the hot blast stove brick, the stroke of the slider, the depth of pressurization, and the pressure can be flexibly adjusted to precisely meet the forming requirements of various hot blast stove bricks, covering the full range of hot blast stove refractory production in the metallurgy, chemical, and building materials industries. There is no need to worry about the uneven pressurization caused by the deviation of raw material filling and the complexity of the structure. 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, and meeting the batch supply requirements of large-scale hot blast stove projects.

The equipment is equipped with a dedicated forming parameter database for hot blast stove bricks, integrating the optimal forming process parameters for various specifications and different materials of hot blast stove bricks, including high alumina hot blast stove bricks, silica checker bricks, and special-shaped wedge 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, easily meeting the strict quality requirements of large-scale hot blast stove projects at home and abroad, and helping enterprises smoothly open up the overseas high-end refractory 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 hot blast stove 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 consumable costs, and 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 green bodies, and constant temperature conveyor lines, building a fully automatic and intelligent forming production line for hot blast stove bricks, achieving unmanned control from distribution, pressing, pressure holding, demolding to green body transfer and inspection, minimizing human intervention, and ensuring 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 in line with the global refractory industry's trend of intelligent, digital, and green transformation, and helping enterprises build an intelligent production base for high-end hot blast stove 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 forming equipment for 45 years, deeply exploring the forming process pain points of high-end refractory products such as hot blast stove bricks, and insisting on customizing technology to empower the refractory industry's upgrade. 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, and production capacity requirements of customers' hot blast stove bricks, fully meeting the mass production needs of various hot blast stove bricks and adapting to the refractory supply of different-scale hot blast stove projects.