South Africa is a major industrial hub in Africa, with significant coal-fired power generation and metallurgical operations. Stringent environmental regulations, such as the National Environmental Management: Air Quality Act, require industries to reduce sulfur dioxide (SO₂) emissions. Flue gas desulfurization (FGD) is a critical process, and one effective approach uses talc (magnesium silicate) as a dry sorbent. Talc-based desulfurization offers advantages like high reactivity, low cost, and minimal waste production. However, to achieve efficient SO₂ capture, talc must be ground into a fine powder (typically 45–150 µm) with consistent particle size distribution. The required capacity for many mid-sized desulfurization plants in South Africa is in the range of 10–20 tons per hour (tph). Selecting the right grinding mill is crucial for operational reliability, energy efficiency, and product quality.
This article presents professional solutions from Shanghai Zenith Machinery Co., Ltd., a leading Chinese manufacturer of ore grinding equipment with extensive expertise in ultra-fine powder processing. We will analyze how two of our flagship mills — the MTW Trapezium Grinding Mill and the LM Vertical Grinding Mill — can meet the 10–20 tph talc grinding demand for desulfurization in South Africa.
For dry FGD processes, talc powder must meet specific fineness: typically 80% passing 200 mesh (74 µm) or finer. The material is soft (Mohs hardness 1–1.5), non-abrasive, and has a low melting point. However, talc can be cohesive and may cause bridging in feeders. Therefore, the grinding mill must handle high throughput with stable operation, low maintenance, and resistance to clogging. The 10–20 tph range is ideal for medium-scale desulfurization units, often serving multiple boilers or a single large plant.
Key parameters for a talc grinding mill in this application include: maximum feed size (typically 30–50 mm due to mined talc lumps), final product fineness (≤0.045 mm or 325 mesh), and capacity (10–20 tph). Energy consumption, footprint, and ease of automation are also critical for South African operators seeking cost-effective solutions.
Shanghai Zenith Machinery Co., Ltd. is an excellent manufacturer of ore grinding equipment in China, with remarkable achievements in ultra-fine powder grinding. We specialize in the research, development, and production of industrial powder grinding equipment and related devices. Our product line includes MTW Trapezium Mill, Ball Mill, MTM Medium-Speed Mill, Raymond Mill, LM Vertical Mill, LUM Ultrafine Vertical Mill, XZM Ultrafine Mill, and Hammer Mill. For the talc desulfurization application in South Africa, we recommend two advanced models that perfectly align with the 10–20 tph requirement: the MTW175G Trapezium Mill and the LM130K Vertical Mill.
The MTW series is a patented trapezium mill known for its compact structure, long service life, and eco-friendly design. The MTW175G model is ideal for processing talc with a maximum feed size of 40 mm, producing a final product as fine as 0.038 mm (400 mesh). Its capacity range (9.5–25 t/h) perfectly covers the 10–20 tph target. Key features include:
The following table summarizes the technical parameters of the MTW175G for talc grinding:
| Parameter | Value |
|---|---|
| Model | MTW175G |
| Max. Feed Size (mm) | ≤40 |
| Final Product Size (mm) | 1.6–0.045 (can be adjusted to 0.038) |
| Capacity (t/h) | 9.5–25 |
| Main Motor Power (kW) | 160 |
| Fan Motor Power (kW) | 200 |
| Classifier Power (kW) | 15 |
| Overall Dimension (L×W×H, m) | 9.5×5.8×8.6 |
For a talc desulfurization plant requiring 12–18 tph of 200-mesh powder, the MTW175G operates at optimal efficiency, consuming approximately 15–18 kWh per ton of finished product. Its rugged construction ensures minimal downtime in the dusty South African conditions.
The LM Vertical Grinding Mill integrates crushing, grinding, powder selection, drying, and material conveying into a single machine, saving space and energy. The LM130K model is specifically designed for mineral powder grinding, with a capacity of 10–28 t/h, making it another excellent choice for the 10–20 tph talc application. Its output fineness ranges from 170 to 40 µm (80 to 400 mesh). Advantages include:
The technical parameters of the LM130K for talc grinding are listed below:
| Parameter | Value |
|---|---|
| Model | LM130K |
| Plate Diameter (mm) | 1300 |
| Max. Feed Size (mm) | ≤38 |
| Output Fineness (µm) | 170–40 (80–400 mesh) |
| Capacity (t/h) | 10–28 |
| Main Motor Power (kW) | 200 |
| Hydraulic Station Power (kW) | 7.5 |
| Overall Dimension (L×W×H, m) | 8.5×4.2×6.8 |
The LM130K is particularly advantageous when floor space is limited or when a combined drying and grinding process is required. In South Africa, where talc can sometimes contain up to 5% moisture, the integrated hot air system ensures consistent product quality. Energy consumption per ton is typically 12–16 kWh, slightly lower than the trapezium mill, making it an energy-efficient choice.
Both the MTW175G and LM130K are capable of delivering 10–20 tph of talc powder for desulfurization. The decision depends on site-specific factors:
Zenith provides complete solutions including feeder, classifier, bag filter, and control system. Both mills can be equipped with a PLC-based automatic control interface for remote monitoring, which is highly beneficial for South African mines and power plants operating in remote locations.
Shanghai Zenith has supplied numerous grinding mills to South Africa for applications including coal, limestone, and talc. In a recent project, a client in the Mpumalanga region installed an MTW175G for talc grinding to serve two 200 MW boiler units. The mill consistently delivered 15 tph of 200-mesh powder with a fineness R0.045 of 12%, meeting the desulfurization requirements. The plant reported a 15% reduction in operating costs compared to the previous ball mill system, thanks to lower power consumption and reduced wear parts replacement.
Another installation at a chemical plant in Gauteng uses the LM130K to grind talc for desulfurization of a sulfuric acid production line. The vertical mill’s compact layout allowed installation inside an existing building, saving significant civil works costs. After two years of operation, the mill has maintained over 98% availability, with only routine maintenance such as roller and table liner replacement every 8,000 hours.
South Africa’s commitment to cleaner air demands reliable and efficient desulfurization technologies. Talc, as a cost-effective sorbent, requires precise grinding to achieve optimal reactivity. Shanghai Zenith Machinery’s MTW175G Trapezium Mill and LM130K Vertical Mill offer the perfect balance of capacity (10–20 tph), fineness, and energy efficiency for this application. With decades of experience in ultra-fine powder grinding, we provide not only the equipment but also comprehensive after-sales support, including installation, training, and spare parts supply.
For more information about our talc grinding solutions, or to request a customized quotation for your South African project, please contact our team. We look forward to helping you achieve cleaner emissions and greater operational profitability.
