Recently, Sinosteel Luonai Magnesium Processing Area received its first order for the construction of a settling electric furnace with a diameter exceeding 4.6 meters. Its developed "pot bottom" furnace structure and double working layer composite masonry technology have reduced the heat loss of the furnace body, helping enterprises and customers achieve the dual goals of energy conservation, consumption reduction, and cost optimization.

Technicians at the pre assembly site

Measure the outer edge dimensions of the settling electric furnace

Driven by the green and low-carbon strategy, the non-ferrous industry adopts side blowing furnace and settling electric furnace processes for solid waste treatment. After the side blowing furnace melts the tailings, the molten liquid flows to the settling electric furnace for slag copper separation, reducing the metal content in the waste residue. The settling electric furnace is a core equipment in the field of metallurgy and chemical engineering, which relies on the electric heating effect and physical settling principle to achieve efficient material processing. The green transformation in the high-temperature industrial field has spurred the demand for technological innovation in the refractory materials industry. As a core equipment in metallurgy and chemical industry, the performance of refractory materials for the lining of settling electric furnaces directly determines the operational efficiency and service life of the equipment.

The refractory material for settling electric furnace lining developed by Zhonggang Luoyang Magnesium resistant Operation Area fully utilizes the technical advantages of high temperature resistance and corrosion resistance of magnesium products. Magnesium chromium bricks sintered at ultra-high temperatures are selected to effectively resist the erosion and infiltration of liquid slag, curb the vicious cycle of "slag invasion infiltration structural peeling", and provide guarantee for the long-term operation of equipment. The masonry structure of a settling electric furnace with a diameter of over 4.6m is composed of more than 2500 magnesia chrome bricks of different specifications, forming a "pot bottom" structure with 15 concentric circles that are high on the outside and low on the inside. By using the principle of gravity to guide the metal liquid to naturally converge towards the center, combined with the high wear resistance of magnesia chrome bricks, the scouring force of the furnace bottom is significantly reduced; At the same time, the composite masonry technology of upper and lower double-layer working layers significantly reduces the heat loss of the furnace body.

To ensure that the masonry of the settling electric furnace is completely consistent with the on-site masonry, the magnesium work area spent more than 20 days gnawing on the extremely difficult "hard bone" of the furnace bottom pre assembly. During the pre assembly construction process, the team adhered to the "millimeter level" operation standard, personalized customized more than 2500 single bricks according to the curvature of the "pot bottom", and used a "dog tooth interlocking" mechanical structure for staggered masonry, strictly controlling the thickness of the mortar layer; Simultaneously use specialized arc-shaped molds to calibrate the curvature, diameter, and height to ensure the accuracy of the furnace body; In terms of expansion joint treatment, according to the design drawings, fill the expansion cardboard according to different areas, spacing, and expansion coefficients to ensure uniform dispersion of thermal stress. From grassroots processing to quality acceptance, each process follows acceptance standards higher than industry standards. To ensure the smooth pre assembly of every layer and brick type, pre assembly workers often squat at the bottom of the furnace, comparing design drawings and adjusting tools meticulously. Sweat soaked their work clothes, but they remained fully focused and did not miss any details, effectively ensuring the smooth progress of the entire pre assembly work and laying a solid foundation for ensuring the stability of product use.

Pre assembly process of settling electric furnace

The successful completion of the first settlement electric furnace masonry order with a diameter exceeding 4.6m demonstrates the technical strength and team combat capability of Sinosteel Luonai's magnesium work area. In the future, various high-quality products developed and produced by Sinosteel Luonai will be deeply integrated into multiple industries such as steel and metallurgy with better performance and more environmentally friendly production methods, helping to promote the green transformation and development of high-temperature industries.