As a core equipment in steelmaking, the converter is responsible for the smelting of molten iron and the refining of molten steel. The lining bricks used in the converter's interior are exposed to extreme high temperatures above 1600°C for long periods, while also enduring the erosion of molten steel, the corrosion of furnace gas, thermal shock from temperature fluctuations, and mechanical impacts during the smelting process. They are the key refractory materials ensuring the continuous, safe, and efficient operation of the converter. The quality of converter lining bricks directly affects the maintenance cycle, smelting efficiency, and production costs of the converter. The core indicators for evaluating the quality of converter lining bricks include the uniformity of the body density, density, resistance to erosion, and thermal shock resistance. Currently, the technical limitations of traditional forming equipment often lead to problems such as uneven density, high-temperature spalling, cracking, and damage of the lining bricks. Frequent replacement of the lining bricks not only increases production costs but also affects the continuity of smelting. 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 converter lining bricks, it has innovated the servo screw press technology to create dedicated forming equipment for converter lining bricks, leveraging the core advantages of the equipment to produce high-quality converter lining bricks and providing a full-process precise forming solution for global refractory material enterprises.

The forming quality of converter lining bricks directly determines their high-temperature stability, resistance to erosion, and service life. The raw materials are mostly refractory aggregates and fine powders such as magnesia sand, graphite, and high-alumina bauxite, mixed with binders. The mixture has poor fluidity and a complex particle size distribution. Moreover, the forming process of converter lining bricks requires extremely high precision in applied pressure, pressure application speed, and holding time - it must ensure uniform density throughout the body, reduce porosity, resist the erosion of molten steel and high temperatures, and avoid hidden defects during the forming process to ensure no cracking or spalling at high temperatures.

Zhengzhou Haloong has deeply studied the raw material characteristics, forming process logic, and industry upgrade demands of converter lining bricks. It has optimized the HLDS series servo screw press with a core technology of direct drive by permanent magnet synchronous servo motor + static pressure flexible pressure transmission + intelligent numerical control system. The equipment's precision, stability, and adaptability have been comprehensively upgraded, precisely solving the forming problems of converter lining bricks and becoming the preferred equipment for mass production of high-quality converter lining bricks, assisting refractory material enterprises in creating high-end products suitable for extreme high-temperature smelting conditions.

Equipped with a direct drive system of permanent magnet synchronous servo motors, it completely eliminates 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 converter lining bricks, which can digitally and precisely set the striking energy, pressure application speed, number of stepwise pressure applications, and holding time. The energy repetition control accuracy is ≤±1%, ensuring that the pressure in each forming process is highly consistent and completely eliminating quality deviations caused by manual operation and mechanical fluctuations. In response to the poor fluidity and tendency to form lumps of the converter lining brick mixture, a customized stepwise flexible pressure application process is adopted. It first applies light pressure to quickly expel the residual air inside the body, then applies pressure stepwise and layer by layer to compact it, and finally maintains pressure for a long time to shape it. This ensures uniform force application throughout the body, including the center, edges, and corners, with density fluctuations controlled within a very small range. The coefficient of density variation is far superior to industry standards, perfectly ensuring the uniform density and compactness of the entire body, significantly enhancing the resistance to erosion, thermal shock resistance, and high-temperature stability of the finished product, extending the service life of the converter lining bricks, and reducing the operation and maintenance costs for terminal steel 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 (magnesia-carbon, magnesia-alumina, high alumina), size, and structural complexity (standard brick, special-shaped brick, steel tapping port brick) of the converter lining 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 converter lining bricks, covering the entire scene of refractory material production for the steelmaking industry. There is no need to worry about the problem of uneven pressurization caused by the deviation of raw material filling and complex 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 converter projects.

The equipment is equipped with a dedicated forming parameter database for converter lining bricks, integrating the optimal forming process parameters of various specifications and different materials of converter lining bricks, including the forming parameters of common products such as magnesia-carbon furnace wall bricks, magnesia-alumina furnace bottom bricks, and special-shaped steel tapping port 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 converter projects at home and abroad, and helping enterprises smoothly open up the overseas high-end refractory material 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 converter lining brick production, and meeting the green and low-carbon development needs of the refractory material industry. At the same time, the static pressure transmission structure has minimal wear, and is 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 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 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 converter lining bricks, achieving unmanned control throughout the process from distribution, pressing, pressure holding, demolding to green body transportation and testing, 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 conforming to the global refractory material industry's trend of intelligent, digital, and green transformation, and helping enterprises build an intelligent production base for high-end converter lining bricks.

As a leading enterprise in the field of electric servo screw presses in China, 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 converter lining bricks, and insisting on customizing technology to empower the upgrading of the refractory material 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, and production capacity requirements of the customer's converter lining bricks, fully meeting the mass production needs of various converter lining bricks and adapting to the refractory material supply of converter projects of different scales.