Liming Heavy Industry's Integrated Solution for the Full-Process Milling Unit in Non-Ferrous Metal Smelting

Against the backdrop of the modern industrial system, the non-ferrous metal mining industry serves as an irreplaceable "strategic source". Critical metals such as copper, aluminum, lead, and zinc form the core lifeline of strategic emerging industries. With the advancement of industrialization in emerging economies and the rise of the new energy industry, the demand for these metals has been gradually increasing. However, due to pressures from stricter environmental protection requirements and the depletion of high-grade resources, production costs have been rising continuously. While responding to market competition, enterprises are accelerating their transformation toward green and circular development to align with the needs of the industrial chain.

Among the 24 strategically important minerals that have been clearly designated, 14 are metal varieties, accounting for 60%. This highlights the pillar role of metallic minerals in the strategic resource system.

Pulverized Coal Preparation for Industrial Furnaces in Non-Ferrous Metal Smelting

Non-ferrous metal smelting is the core process of converting ores into industrial metals, serving as a strategic cornerstone for supporting economic and technological development. It provides essential materials for key fields such as new energy and high-end electronics, and drives the upgrading of the industrial chain. Advanced smelting technologies can improve resource utilization efficiency, reduce energy consumption and pollution, making them a key pathway to green manufacturing.

With the green transformation and technological upgrading of the industry, green energy conservation has become the development direction of the sector. Industrial furnaces for pyrometallurgical smelting still hold a significant market share due to their mature technology and stable efficiency. As a key fuel and reducing agent for these furnaces, clean pulverized coal plays a dual role in fuming furnaces: providing a stable heat source and participating in mineral reduction to separate metals. It is thus an indispensable core material for pyrometallurgical smelting.

Equipment Selection and Process Flow

LM Vertical Roller Mill is a large-scale, high-efficiency, and energy-saving grinding product independently developed by Liming Heavy Industry. It integrates technological advantages introduced from Germany’s Loesche and Pfeiffer, combined with the company’s nearly 40 years of R&D and manufacturing experience. Specifically designed for clean pulverized coal preparation, the mill integrates crushing, grinding, drying, and powder classification functions in one unit. It is compatible with a variety of raw materials, including anthracite, bituminous coal, lignite, semi-coke, coke, and petroleum coke. With flexibly adjustable grinding fineness and stable and safe operation, it has established an excellent reputation in the industry.

Limestone Pulverization for Flue Gas Desulfurization in Non-Ferrous Metal Smelting

During the pyrometallurgical smelting of heavy metals such as lead, antimony, zinc, and copper, large amounts of waste gas containing sulfur dioxide (SO₂) and fume dust are emitted, causing severe environmental pollution. Therefore, flue gas desulfurization (FGD) has become an indispensable and critical environmental protection process in this type of smelting technology. Currently, the limestone-gypsum method is the most widely used mainstream desulfurization technology in the industry. This technology achieves desulfurization by enabling a chemical reaction between the desulfurizing agent and SO₂ in the flue gas. As the core desulfurizing agent, the quality and preparation efficiency of limestone powder directly affect the final desulfurization effect, making it a core prerequisite for ensuring the compliance of flue gas emissions.

Equipment Selection and Process Flow

As an integrated solution provider for grinding equipment, Liming Heavy Industry, relying on nearly 40 years of accumulated R&D and manufacturing experience, has launched two core pieces of equipment—MTW European Trapezium Grinding Mill and LM Vertical Roller Mill—tailored to the core needs of the flue gas desulfurization field. Based on the original technology, this series of equipment has undergone systematic optimization, fan adjustment, performance upgrading of the powder classifier, and addition of secondary classification equipment. It can produce limestone powder with different particle sizes simultaneously to meet the requirements of various desulfurization processes, and is widely used in the field of limestone-gypsum wet flue gas desulfurization.

High-Value Grinding Utilization of Recycled Smelting and Metallurgical Slag

The grinding of non-ferrous metal tailings refers to the process of converting solid waste generated during non-ferrous metal smelting into fine powder of specific fineness through processes such as pre-treatment, crushing, grinding, and classification. This lays the foundation for subsequent resource utilization pathways, ultimately achieving the reduction, harmlessness, and high-value utilization of tailings. It also reduces the environmental risks and resource waste caused by the stockpiling of solid waste in the smelting industry.

Based on the smelting processes and metal types, metallurgical slag can be classified into the following three major categories:

Equipment Selection and Process Flow

As the core equipment in the metallurgical solid waste pulverization production process, Liming Heavy Industry’s LM Series Slag Vertical Roller Mill integrates fine crushing, grinding, drying, powder classification, and conveying functions in one unit. It possesses a number of independent patent technologies and intellectual property rights, with its key technical and economic indicators reaching the advanced level in the industry. Not only can it provide stable and continuous operation support for metallurgical slag powder production, but it can also significantly improve grinding efficiency, helping enterprises achieve efficient and intensive production.

As the non-ferrous metal smelting industry stands at the dual critical point of "ensuring supply" and "upholding environmental protection", Liming Heavy Industry’s full-process pulverization solution for non-ferrous metal smelting, with its one-stop convenience and high-efficiency, eco-friendly practicality, reduces burdens for enterprises and empowers the industry. In the future, Liming Heavy Industry will continue to deepen innovations in grinding technology, and with solutions more in line with industry needs, move forward steadily in industry competition. It will ensure that the utilization of every piece of metal resource embodies both economic and environmental value, jointly building a value symbiosis system for the circular development and long-term prosperity of the industrial chain.