Waste ash turned into water purifying agent! Liming Heavy Industry's grinding technology enhances the recycling value of secondary aluminum dross

Aluminum is an indispensable basic raw material for national economic construction and the development of strategic emerging industries. Secondary aluminum dross is a hazardous waste inevitably generated in all aluminum smelting processes such as primary aluminum production, aluminum processing, and waste aluminum recycling. It releases toxic gases when exposed to water, and the contained salts and fluorides can seep into the environment and cause pollution. Faced with increasingly stringent environmental protection requirements and considerations of economic feasibility, realizing the resource-based comprehensive utilization of secondary aluminum dross has important practical significance and application value.

Project of Secondary Aluminum Dross Powder Production

The secondary aluminum dross grinding project built by Liming Heavy Industry for the customer adopts MTW European trapezium mill as the core grinding technical support. It reconstructs the aluminum dross treatment path through wet regeneration technology, establishing a circular chain of "hazardous waste → water purifying agent → resource regeneration". The project has obtained national green technology certification and has been successfully implemented and put into operation in the local industrial park.

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During the project preparation phase, the client conducted multi-dimensional rigorous research and technical verification targeting common industry challenges in traditional processes, such as low acidolysis efficiency and high energy consumption caused by uneven particle size of aluminum dross. Liming Heavy Industry's MTW European trapezium mill stood out due to its advantages in precise classification technology, high efficiency, energy saving, and environmental friendliness.

After being ground by MTW European trapezium mill, the secondary aluminum dross powder is further processed through resource utilization technology to become raw material for producing aluminum chloride series water purifiers. This truly realizes the coordinated development of hazardous waste treatment and resource recycling, providing a replicable technical solution for the green transformation of the aluminum industry and the construction of "zero-waste cities".

Processing material: Secondary aluminum dross

Application:As raw material for producing aluminum chloride series water purifiers

Equipment: Liming Heavy Industry MTW European trapezium mill

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Secondary aluminum dross recycling process

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In the process flow of preparing water purifiers from secondary aluminum dross, grinding equipment undertakes the key tasks of crushing and refining. Liming Heavy Industry's MTW European trapezium mill, with its characteristics of high efficiency, stability, energy conservation and environmental protection, facilitates the efficient utilization of aluminum dross resources. It grinds raw materials to the required fineness, laying a solid foundation for preparing raw materials for water purifiers.

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Secondary aluminum dross is uniformly, quantitatively and continuously fed into the grinding chamber of the main machine through a frequency conversion belt feeder for grinding. The ground secondary aluminum dross powder is sent to the powder separator by the air flow of the fan for classification. Under the action of the analyzer, materials that do not meet the fineness requirements fall into the grinding chamber for re-grinding, while qualified materials enter the cyclone powder collector through the pipeline with the air flow for separation and collection, and are discharged through the discharge device as finished powder. The separated air flow enters the fan through the return air pipe at the upper end of the cyclone powder collector. The secondary aluminum dross grinding system operates under negative pressure and airtight conditions, equipped with a pulse dust collector, with no dust overflow, which meets national environmental protection standards and the stringent requirements for high-end water purifier raw materials.

Selection of Grinding Equipment for Secondary Aluminum Dross

In view of the characteristics of secondary aluminum dross, such as high hardness, unique toughness and complex and diverse components, Liming Heavy Industry's MTW European trapezium mill plays an irreplaceable key role in the pretreatment stage of secondary aluminum dross. It provides high-quality raw materials with highly suitable particle sizes for subsequent processes, effectively improving the efficiency of resource utilization of aluminum dross as hazardous waste. It also leads the industry in breaking through traditional development bottlenecks, accelerating the construction of a green, circular and sustainable new ecology in the aluminum industry.

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1. Reliable and Proven Equipment

Employs seven core patents and nearly four decades of mill manufacturing expertise. Fourth-generation grinding mill with continuous refinement, recognized as a premium product in the pendulum mill industry.

2. Bevel Gear Integrated Transmission

Precise transmission ratio, high-power performance, ensuring efficient grinding of secondary aluminum dross with high output and low energy consumption. Submerged design for smooth operation, minimal vibration, and low noise.

3. Thin Oil Lubrication System

Both main shaft and fan drive systems use thin oil lubrication, with an oil change interval of up to 4 months, reducing maintenance frequency.

4. New Variable-Frequency Powder Separator

Features an advanced hanging cage-type powder separator with high efficiency and frequency conversion control for precise fineness adjustment.

5. Economical Investment & Eco-Friendly

Compact footprint, simple structure, complete system integration, low infrastructure costs, short construction period,and rapid ROI. Minimal pollution in the finished product. The entire system operates under negative pressure to eliminate dust emissions, meeting the latest national environmental standards.

6. Comprehensive Solutions

Tailored for the complex processing requirements of secondary aluminum dross, offering integrated services from design, supply, installation to after-sales support. Delivers high-quality raw materials with precisely controlled particle size, significantly enhancing the resource utilization efficiency of hazardous aluminum dross waste.

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Liming Heavy Industry has deeply integrated intelligent grinding technology with green processes, providing an efficient and sustainable solution for the resource-based treatment of secondary aluminum dross. This has realized the value transformation of secondary aluminum dross from an "environmental burden" to a "raw material for water purifiers". While eliminating environmental risks, it also creates considerable economic value, promoting the coordinated development of resource recycling and economic benefits.

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