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Turning Steel Metallurgy's Complex Solid Wastes into Resources

Resource Utilization of Iron and Steel Solid Wastes: Kaizheng Environmental Protection's Technology Aligns
As the iron and steel industry advances in green transformation, the treatment of complex solid wastes such as zinc-containing dust and sludge has become a key to building "zero-waste factories". The "resource closed-loop and efficient recovery" pathway proposed in the monograph Technology for Resource Recycling of Complex Solid Wastes in Iron and Steel Metallurgical Processes is highly aligned with Luoyang Kaizheng Environmental Protection's core solutions, providing enterprises with dual support of "theory + practice".
I. Industry Pain Points and Frontier Technology Guidance
Complex solid wastes in the iron and steel industry face three major challenges: low resource recovery rate, poor equipment adaptability, and high environmental protection costs. The monograph specifically proposes core technology directions:
●Multi-field collaborative reduction for zinc removal, targeting a zinc recovery rate of ≥90% and an iron metallization rate of ≥65%;
●Intensive agitation pelletizing, increasing pellet strength to ≥2000N per piece;
●Establishment of a full-process closed loop covering "pretreatment - reduction - reuse".

II. Core Technology Practice of Kaizheng Environmental Protection
1. Rotary Hearth Furnace Complete Equipment
It efficiently matches the multi-field collaborative technology, with stable furnace temperature of 1100-1300℃ and low-oxygen sealing (oxygen content ≤2%). In the Hebei Iron and Steel project, the zinc recovery rate reached 90-92%, the iron metallization rate 60-68%, and the continuous operation cycle exceeded 300 days.
2. High-Intensity Mixer
The KZD single-shaft self-cleaning model solves the mixing problem of high-viscosity materials, with a mixing uniformity variation coefficient of ≤3%. In projects such as Shanxi Jianlong, the pellet qualification rate has been increased to over 98%.
3. Full-Process Integrated Solution
It provides full-chain services including "water washing for desalination - rotary hearth furnace reduction - magnetic separation recovery - tailings reuse". For example, in a project in Henan, tailings are processed into steel slag micro-powder, realizing 100% resource utilization of solid wastes.
III. Differentiated Advantages and Application Value
●Intelligence and Low Energy Consumption: Equipment is equipped with IoT modules, and waste heat recovery design reduces energy consumption per ton of treatment to below 80kWh, achieving a 25% energy saving;
●Economic and Environmental Benefits: A project handling 10,000 tons of zinc-containing dust and sludge annually can recover 8,000 tons of zinc (with an annual revenue of 160 million yuan), helping enterprises meet ultra-low emission standards and obtain Class A environmental performance certification.

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