Metallurgical rotary kiln

Jiangsu Haijian Co., Ltd. is a professional metallurgical rotary kiln manufacturer and company. We provide specialized equipment for cement production, industrial solid waste incineration, and mining and metallurgical applications. As core equipment in the metallurgical and chemical industries, metallurgical rotary kilns undertake the important task of high-temperature conversion and purification of various minerals. In steelmaking, they transform lean iron ore (Fe₂O₃ content 30-50%) into highly magnetic magnetite (Fe₃O₄) through a precisely controlled magnetization roasting process, increasing iron recovery from 40% to over 85%. In nickel-chromium metallurgy, the rotary kiln's oxidation roasting system effectively separates nickel-chromium minerals, achieving nickel leaching rates of up to 92%. In the aluminum industry, its stable temperature field ensures the complete conversion of aluminum hydroxide to alumina (α-Al₂O₃ content >95%).

The operating principle of a metallurgical rotary kiln is based on the precise coordination of dynamic calcination and gas-solid reaction. The kiln body is installed at an inclination angle of 3-5° and rotates at a speed of 0.5-5 rpm. The material undergoes a complex trajectory of 20-50 meters within the kiln, with a residence time of 2-4 hours. The high-temperature zone utilizes staged combustion technology, with multi-channel burners (using pulverized coal, gas, or oil/gas) achieving precise temperature control of 800-1600°C, with a temperature differential within ±15°C.

In terms of maintenance and management, the metallurgical rotary kiln has established a full lifecycle health management system. Refractory material maintenance utilizes infrared thermal imaging technology (resolution 0.1°C) to monitor changes in kiln lining thickness in real time. When the remaining thickness of high-alumina bricks (Al₂O₃ ≥ 75%) is less than 150mm, a warning is issued for replacement. The roller bearings are equipped with online oil monitoring sensors that predict the remaining lifespan through wear particle analysis. The intelligent lubrication system automatically adjusts the grease injection rate based on load changes (with an accuracy of ±3%).