I. Project Background: The Three Core Pain Points of Traditional Coal-Water Slurry Technology

In current coal-to-chemicals operations involving the preparation of coal-water slurry, the conventional single-stage grinding process dominated by ball mills and rod mills has long been plagued by three major pain points, which severely undermine gasification efficiency and project economics and represent core challenges for customers:

1. The fineness bottleneck is difficult to overcome.

Traditional ball milling / The rod mill cannot achieve stable breakthrough. 325 Eye ( 45 μm ) At the fineness control stage, the retention of coarse particles leads to incomplete slurry gasification, resulting in a low carbon conversion rate, significant resource waste, and failure to meet the process requirements of high-end gasifiers.

2. Low concentration and high energy consumption.

Unreasonable particle size distribution makes it difficult to increase the concentration of the coal-water slurry, which not only increases transportation energy consumption but also raises the oxygen-to-fuel ratio in gasification, thereby reducing the yield of syngas ( CO+H₂ ) The low feedstock composition limits the production of ammonia, methanol, and other products.

3. Core equipment wears out quickly, resulting in significant downtime losses.

Coarse particles cause severe erosive wear on process nozzles (burners) and gasifier linings, resulting in shortened service life of critical components, frequent maintenance shutdowns, a high risk of unplanned outages, and substantial increases in maintenance costs and production losses.

II. Wanrong Solution: Cell Mill + Multi-axis grinding, two-stage concentration · Ultra-fine precision grinding system

Addressing the pain points of traditional processes, Wanrong Powders has launched “ Cell grinder + Multi-axis grinder ” Ultra-fine grinding integrated solution—no need to dismantle the existing ball-milling system, with “ A rough grind + Second-stage fine grinding ” Its modular design achieves integrated ultrafine processing, concentration, and efficiency enhancement of coal-water slurry, thereby enabling the construction of a gasifier. “ Deep digestion ” A system that balances low-cost retrofitting with high returns.

[One coarse grinding (existing ball mill / (Stick grinding) → [Second-stage fine grinding (cell grinder ®+ Multi-axis grinding) → [High-Concentration Ultra-Fine Coal-Water Slurry] → 【Gasifier / Combustion Furnace

1. A coarse grinding stage: utilizing the existing ball mill. / Rod mill equipment, which coarsely grinds coal to ≤3mm , requiring no additional modifications and making full use of existing equipment resources;

2. Second-stage fine grinding: The coal-water slurry after coarse grinding enters the Wanrong cell mill. + A multi-axis milling system, in which the cell mill performs ultrafine grinding and particle-size distribution optimization, while the multi-axis mill focuses on capacity expansion and efficiency enhancement, as well as auxiliary concentration, thereby achieving both ultrafine particle size reduction and deep concentration in synergy.

3. Finished product output: direct output D90 < 45 μm （ 325 above the target), solid content 60%-65% The high-concentration, ultrafine coal-water slurry requires no subsequent dispersion treatment and can be directly fed into the gasifier for efficient gasification.

III. Core Advantages of the Plan

1. Breaking the fineness barrier: precise gradation, D90 < 45 μm Stable compliance

Centering on the Wanrong cell grinder as the core of the two-stage grinding process, we have achieved a thorough breakthrough. 325 Eye ( 45 μm ) Fineness bottleneck, stable realization D90 < 45 μm ， -2 μm Particle proportion ≥90% The particle size distribution is uniform, significantly improving the slurry’s rheological properties and ensuring complete combustion and gasification of the coal-water slurry in the gasifier, thereby enhancing carbon conversion efficiency at the source.

2. Deep concentration: increased concentration 2%-4% , a leap in gasification efficiency

By optimizing particle size distribution through cell milling, efficient spatial packing of particles is achieved, thereby increasing the concentration of the coal-water slurry while maintaining excellent slurry flowability. 2%-4% , Core value highlighted:

• Each upgrade 1% The concentration of coal-water slurry can reduce specific oxygen consumption by approximately 1.5% , significantly reducing gasification energy consumption;

• Effective gas ( CO+H₂ ) The composition is significantly improved, directly increasing the output of products such as synthetic ammonia and methanol;

• Enhanced slurry stability reduces layering and sedimentation, thereby lowering the risks of transportation and gasification.

3. Protect Core Equipment: Extend Its Lifespan 20%+ , reduce downtime losses

The ultra-fine, uniformly distributed coal-water slurry significantly reduces the erosive wear caused by large particles on the burner and furnace lining, thereby extending the service life of both the burner nozzles and the furnace lining. 20% In summary, these measures reduce the number of unplanned outages, lower maintenance costs, enhance the operational availability and continuity of the gasification unit, and help the enterprise minimize unnecessary production losses.

4. Low-Cost Retrofit: Modular Integration for Minimal Investment and Rapid Results

The biggest advantage of this solution is that it eliminates the need to dismantle the existing ball-milling system; cell mill. + The multi-axis grinder features a modular design, enabling rapid integration into existing processes, and boasts three key characteristics:

• Low investment for retrofitting: No need to rebuild the plant or replace the front-end equipment—simply add a second-stage grinding module.

• Short installation cycle: modular assembly enables rapid commissioning and start-up, with no impact on existing production schedules.

• High return on investment: Achieve increased carbon conversion rates with minimal retrofitting costs. 0.5%-1.0% , rapid return on investment.

5. Energy Conservation and Consumption Reduction: System-Wide Energy Consumption Declines 40%+ , low operational and maintenance costs

The scheme employs a Wanrong cell mill. + Multi-axis milling integration reduces overall system energy consumption compared with conventional single-ball-milling processes. 40% The above:

• The cell mill consumes only 28-35 Degree, more energy-efficient than traditional ball milling 40%-50% ；

• Multi-axis grinding synergistically enhances efficiency and reduces media wear. 40% Above, reducing media replacement costs;

• Programmable Logic Controller Fully automated control reduces manual intervention and lowers labor-related O&M costs.

IV. Core Equipment Configuration of the Plan

1. Core Host: Wanrong Cell milling® Cell grinder

Core equipment for second-stage ultra-fine fine grinding, gradation adjustment, and deep concentration—breaking through 325 Addressing bottlenecks and achieving stable implementation D90 < 45 μm , simultaneously increase the concentration of coal-water slurry, adapt to the harsh operating conditions of coal chemical processes, and ensure long-term continuous operation. ≥8000 Hour.

2. Collaborative Equipment: Wanrong Multi-Axis Grinder

Featuring enhanced pre-grinding efficiency and parallel scalability, this solution delivers high throughput, low energy consumption, and large processing capacity. When integrated with cell mills, it further boosts overall grinding efficiency, adapts to diverse production capacity requirements, and supports scalable manufacturing.

3. Control System: Siemens Programmable Logic Controller Fully automatic system

Enables online fineness control, energy consumption optimization, and fully automated operation, and can 24 Operates continuously around the clock, minimizing human intervention, enhancing system stability, and simplifying operations.

V. Summary of the Plan’s Value

Wanrong Powder Cell Mill + The multi-axis grinding two-stage concentration scheme is not just about grinding—it’s about building your gasifier. “ Deep digestion ” System —— Breakthrough 325 Bottleneck in particle fineness and increasing slurry concentration 2%-4% , reduce oxygen consumption, increase syngas production, and extend burner life / Lining life 20%+ Achieve an upgrade of the ball-milling system with minimal investment, thereby comprehensively enhancing the economic efficiency, operational stability, and competitiveness of coal-to-chemicals gasification units.