Ethiopian Vertical Mill
In today's rapidly developing mining and processing industry in Ethiopia, calcium carbonate, as a basic industrial raw material, directly impacts the competitiveness of downstream industries through its powder processing efficiency. Your company's decision to select a 10-40 ton/hour vertical mill for your planned calcium carbonate plant is a strategically astute one. As a technology-driven company deeply rooted in the field of mining grinding equipment, we understand that in the opportunity-filled Horn of Africa, equipment stability and return on investment are the core considerations for every investor.
This article will present a comprehensive guide to vertical mill procurement, covering aspects such as technical parameter matching, equipment selection logic, regional adaptability improvements, and total lifecycle costs.
In-depth Analysis of the Three Core Requirements of Ethiopian Calcium Carbonate Grinding Projects
1. Flexible Capacity Requirements – 10-40 tons/hour
10-40 tons/hour is not a fixed capacity point, but a dynamic range. This indicates that your company's production plan is phased. In the initial stage of the project, a market test run of 10-15 tons/hour may be conducted; in the mature stage, a stable supply of 30-40 tons/hour is required. Our vertical mill, through the linkage of a variable frequency speed classifier and a hydraulic pressurization system, can linearly adjust its capacity within the range of 3-45 tons/hour without replacing any mechanical parts, perfectly covering your company's flexible needs.
Calcite, calcium carbonate, kaolin Grinding
2. Raw Material Property Adaptation
Ethiopian highland limestone generally has high crystallinity and high free silicon content. When processing this type of ore, ordinary mills experience a more than 30% increase in roller wear. Our solution is to use high-chromium alloy composite cast rollers with a reserved secondary air inlet. When the raw material moisture exceeds 6%, hot air can be actively introduced to ensure that the fineness remains stable at 325 mesh (D95) even under the rainy season conditions common in the Addis Ababa mining area.
Core Advantages of Vertical Mills in Calcium Carbonate Grinding:
1. Energy Consumption Advantage
Compared to traditional ball mills, vertical mills utilize a bed grinding principle, where electricity is applied directly to the material rather than the grinding media. In a production capacity range of 10-40 tons/hour, our vertical mills control power consumption per ton of powder at 22-26 kWh, saving 15% compared to similar products and 28% compared to ball mills. Based on an annual output of 200,000 tons, this translates to annual electricity savings exceeding 800,000 Birr.
2. Fineness Control
The calcium carbonate market is evolving from extensive filling to functional modification. Our vertical mill systems come standard with a secondary grading interface, allowing customers to directly produce active calcium carbonate during the grinding process after adding surface modification equipment. Currently, by adjusting the classifier speed, precise industrial-grade switching between 200 mesh, 325 mesh, 400 mesh, 600 mesh, 800 mesh, and 1250 mesh can be achieved, with a fineness adjustment response time of no more than 3 minutes.
3. Ease of Maintenance
We understand that local technical support resources are relatively scarce in Ethiopia. Therefore, this machine model is designed with modular replacement in mind:
• The grinding roller sleeves feature a flip-over design, extending the lifespan of a single set by 40%.
• The grinding disc liners are segmented and clamped, eliminating the need to remove the feed pipe during replacement.
• The thin oil station integrates temperature and pressure warnings, allowing local technicians to perform self-diagnosis via a touchscreen.
Typical Case Studies in Ethiopia and East Africa
Case 1: Kenya Calcium Carbonate Project
• Capacity: 25 tons/hour (325 mesh, D95)
• Raw Material: Kajado limestone (Mohs hardness 3.5, free silica 8.2%)
• Equipment Model: GLM-1300 Vertical Mill
• Operating Data: After 18 months of continuous operation, the grinding roller wear value was 12.5 mm, 21% lower than the design expectation.
• Customer Feedback: "The dust removal system performed very reliably in environments with extremely high dust levels during the dry season."
Case Study 2: Limestone Grinding Station of a Tanzanian Cement Company
• Capacity: 35 tons/hour (200 mesh D90)
• Raw material moisture fluctuation: 8%-15% (rainy season)
• Solution: Equipped with a hot air furnace + water spray system for mill inlet
• Results: Even after a week-long shutdown during the rainy season, the equipment could still reach full load within 30 minutes upon resumption of production.
Recommended Equipment for 10-40 tons/hour Calcium Carbonate Vertical Mills
1. Bucket Elevator: NE series, no auxiliary blowing required for conveying heights up to 30 meters, reducing breakage rate.
2. Pulse Jet Bag Filter: PPC series, filtration velocity <1.0m/min, outlet emission <10mg/Nm³, meeting Ethiopian environmental standards.
3. Packaging Machine: Depending on your target market, we can configure valve-type bags (25kg/50kg) or ton-type bags, with a specification changeover time of less than 5 minutes.
4. Automated Control System: DCS distributed control system, supporting remote monitoring via mobile APP, eliminating the need for long-term on-site engineers.
FAQ – Three Most Frequently Asked Questions from Ethiopian Customers
Q1: How are vulnerable parts stocked during the sea and land transportation of the equipment from Tianjin Port to Djibouti Port and then to Addis Ababa?
A: We have designed a "1+2" spare parts package for our East African customers for the first year: 1 set of spare parts (grinding rollers, liners, air ducts) is shipped with the main unit; 2 sets of core wear parts will be replenished by air freight within 3 months after equipment commissioning. A local bonded warehouse is under construction in Djibouti and will be available for delivery within 2 weeks in the future.
Q2: How long does the foundation construction and installation period take for equipment with a capacity of 10-40 tons/hour?
A: Installation can begin 7 days after the foundation maintenance period for the main equipment. Our installation team will arrive before the main equipment arrives at the port. The typical cycle from foundation acceptance to powder coating is 25 working days. We provide operation manuals in Chinese, English, and Amharic.
Q3: The voltage fluctuations in the Ethiopian power grid are significant. Can the equipment control system withstand them?
A: The wide-voltage control cabinet (-15%/+10% voltage tolerance) is specifically designed for African operating conditions. Key frequency converters are equipped with DC reactors, and surge protection modules are standard. It has been operating stably in 21 projects in Nigeria, Zambia, and Kenya over the past 3 years.
About of Baichy Heavy Industry
Baichy Heavy Industry is a high-tech mining equipment company integrating R&D, manufacturing, sales, and after-sales service. Focusing on crushing, grinding, and mineral processing equipment, we provide professional solutions to our customers. We are ISO9001:2015 、certified, and our products include mobile crushing palnts, crawler crushing plant, construction waste crushing plants, jaw crushers, sand making machines, cone crushers, fine crushers, grinding mills, ball mills, etc., all with reliable performance to meet diverse project needs.
Our advantages:
• Professional pre-sales support: Free project design and comprehensive solutions to help you accurately select the right equipment;
• Comprehensive on-site service: Providing installation guidance and worker training to ensure smooth equipment commissioning;
• Reliable after-sales guarantee: A complete after-sales system, timely response to technical inquiries and equipment maintenance, ensuring long-term stable operation.
To protect your rights, please contact us through the following official channels for professional service:
Official Website Customer Service
WhatsApp: 0086-15093222637
Email: [email protected]
We are committed to providing high-quality equipment and full-cycle services to deliver comprehensive intelligent solutions for the global mining industry!
