High-efficiency vermiculite deep processing project in Limpopo Province, South Africa

Customer feedback

"The 80t/day vermiculite grinding production line designed by ZOOMJO GROUP far exceeded our expectations! The entire production line adopts a fully enclosed layout, with almost zero dust emissions and 35% lower energy consumption than traditional equipment. The intelligent central control system can monitor the operating status of the mill in real time and adjust parameters remotely through the mobile phone APP, improving management efficiency by 60%. Since it was put into production in 2023, the equipment has been running continuously for more than 5,000 hours without failure, and the particle size accuracy of the finished product has reached 98%, helping us to successfully enter the European high-end building materials supply chain!" --Johan van der Merwe, General Manager of Mineral Pro, South Africa

Project Overview

Limpopo Province in South Africa has the richest vermiculite resources in Africa, but local processing plants generally face problems such as aging equipment, high energy consumption, and unstable fineness. In 2022, ZOOMJO GROUP will tailor an intelligent vermiculite grinding production base for Mineral Pro based on the high temperature and dry climate characteristics of the region, equipped with 2 fully automatic production lines to achieve integrated operations of the entire process of crushing-grinding-grading-packaging, helping customers become a benchmark enterprise in the field of vermiculite deep processing in Africa.

Production line process

1. Pre-crushing and intelligent conveying

Efficient coarse crushing: The raw ore is crushed to 5-20mm by a jaw crusher. The crushing chamber adopts a bimetallic composite lining, which increases the wear resistance by 4 times.

Intelligent storage: After crushing, the vermiculite is transported to the constant temperature silo by a closed bucket elevator. The silo is equipped with an infrared moisture monitor to ensure that the moisture content of the raw material is ≤1.5% to avoid grinding and sticking.

2. Ultra-fine grinding

Grinding: The crushed vermiculite in the silo is evenly and orderly fed into the main machine (Raymond mill) by the electromagnetic feeder for grinding. As the core equipment of the production line, its advantages are high productivity,  safety and reliability. 

Temperature control guarantee: Equipped with air cooling + water cooling dual circulation system, the mill bearing temperature is kept below 70℃ under the ambient temperature of 50℃ to prevent thermal damage to the material.

3. Dynamic classification and environmentally friendly collection

Multi-stage turbine powder concentrator: 20-325 mesh accurate classification is achieved through variable frequency vector control, and the fineness fluctuation is <±1.5%.

Negative pressure dust removal: The finished powder is collected by a pulse bag dust collector, with a dust removal efficiency of ≥99.95%, and tail gas emissions of <5mg/m³, meeting the EU CE certification standards.

Fully automatic packaging: finished powder enters the intelligent ton bag packaging line, with a packaging accuracy of ±0.3%, and supports RFID tag traceability management.

Technical highlights

High temperature resistant design: The motor adopts H-class insulation coating, and the electric control cabinet has a built-in constant temperature and dustproof module to adapt to the extreme environment of 40°C temperature difference between day and night in desert areas.

Circular economy: dust-removed micro powder (<325 mesh) is recycled into the production of building materials and auxiliary materials through the pneumatic conveying system, achieving 100% utilization of resources.