350,000 TPY Ground Granulated Blast Furnace Slag Grinding Production Line in Guangxi

Project Overview

A green building materials company under a large iron and steel group in Guangxi decided to build an energy-saving and environmentally friendly large-scale slag powder production line relying on its own blast furnace slag resources. The core goal of the project is to stably produce high-quality S95 grade and above slag powder on a large scale to replace traditional cement clinker. After comprehensive technical demonstration, the customer finally selected Guilin Mining Machinery’s GKLM large vertical roller mill system solution integrating drying, grinding and classification.

Project Details

Blast furnace slag is pre-homogenized in the raw material shed, then moisture is reduced by the drying system. Afterwards, the material is fed into the GKLM vertical roller mill for grinding through an enclosed constant feeder, while hot air is used to further dry the material. The ground slag powder undergoes precise classification by the classifier. Unqualified coarse slag powder returns for regrinding, and qualified 325-mesh slag powder is carried out by airflow to ensure the specific surface area of finished powder stably reaches 450 m²/kg. The qualified slag powder is then separated and collected by the dust collection system.

Project Advantages

Superior Quality: With precise drying and classification control, the GKLM vertical roller mill ensures stable compliance of finished slag powder on both fineness (325 mesh) and high specific surface area (≥450 m²/kg). The product boasts excellent activity and fully meets the S95 grade standard.

High Efficiency & Energy Saving: Hot air is adopted for synchronous drying with high heat utilization rate. The overall power consumption of the system is reduced by about 35% compared with the traditional "dryer + ball mill" process.

Economical & Eco-friendly: It successfully converts industrial solid waste into high value-added green building materials, which not only generates direct economic benefits but also conforms to the development direction of circular economy.