TAVERO® VM grinding aids

Optimises performance of vertical roller mills

Vertical roller mills (VRM) are an attractive alternative to conventional ball mills for improving efficiency and reducing energy consumption in cement plants. However, they can introduce cement quality issues due to cement pre-hydration. Pre-hydration is the reaction of cement with moisture that can reduce compressive strength, set retardation, workability and increase the initial and final set time. These problems cost cement producers roughly $300 million dollars a year*. 

TAVERO® VM grinding aids mitigate these issues by requiring less water for stable VRM operation. 

Documents

TAVERO® Product Documents

Product Name Product Data Sheet
TAVERO® AG 6300
Product Data Sheet
TAVERO® AG 6400
Product Data Sheet
TAVERO® VM 6100
Product Data Sheet
Products & Accessories

Products

  • Product Name
  • Description
  • Key Benefits
  • Applications Type
TAVERO® AG 6300
Description

TAVERO® AG 6300 is a chemical additive used as a cement constituent to improve the manufacture and the properties of cement.

Key Benefits
  • Reduced tendency of re-agglomeration
  • Reduced need for water injection for bed stabilization, leading to reduced cement pre-hydration
  • Improved flowability
Application Type

TAVERO® AG 6300 can be used for the grinding of most cements in vertical roller mills.
Main applications are:

  • Portland cements
  • Portland blended cements
TAVERO® AG 6400
Description

TAVERO® AG 6400 is a chemical additive used as a cement constituent (European Standard EN 197, point 5.5) to improve the manufacture and properties of cements.

Key Benefits
  • TAVERO® AG 6400 is a grinding aid for cement, which reduces the tendency of re-agglomeration of the fine particles, formed during the communition process
  • TAVERO® AG 6400 permits improvements to the flowability of the finished cement, the efficiency of the mill and separator, and thus increases the production rate with a corresponding reduction in grinding energy consumption.
  • Cement produced with TAVERO® AG 6400 has a  lower pack-set tendency and hence can provide advantages during loading and unloading operations.
Application Type

TAVERO® AG 6400 can be used for the grinding of most cements in open and closed circuit systems.

TAVERO® VM 6100
Description

TAVERO® VRM 6100 is a chemical additive used as a cement constituent to improve the manufacture and the properties of cement.

Key Benefits
  • Reduced tendency of re-agglomeration
  • Reduced need for water injection for bed stabilization, leading to reduced cement pre-hydration
  • Improved flowability
     
Application Type

TAVERO VRM 6100 can be used for the grinding of most cements in vertical roller mills.
Main applications are:

  • Portland cements
  • Portland blended cements
Overview

Optimising production without pre-hydration

Pre-hydration forms on the surface of cement grains, acting as a barrier that reduces the reactivity of the cement. This degrades cement strength and increases set times. TAVERO™ VM additives optimise cement processing by controlling mill vibration with less water. Using less water lowers pre-hydration - helping to deliver higher quality cement.

Using these cement additives at the optimal dosage allows for decrease in:

  • Sprayed water
  • Hot gas required to keep the mill at the ideal temperate
  • Use of hot gas generator

Historic test results show cement plants are able to increase production up to 37 percent* and decrease energy consumption by up to 17 percent* using TAVERO® VM additives.

For example, a cement plant in Europe was running a VRM and spraying water at 1.5% and milling at 100° C. Using a custom-developed TAVERO® VM cement additive, they achieved 28-day strength gains at +3 MPa through chemical activation and +3 MPa by reducing pre-hydration. In addition, an Asian cement plant also employed a TAVERO® VM cement additive, and was able to reduce initial setting time by 39 minutes, improve three-day compressive strength by +3.3 MPa and enhance 28-day compressive strength by +3.7 MPa. 

Using TAVERO® VM additives makes it possible to control mill bed stability while reducing cement pre-hydration. 

Product Advantages

  • Increase cement production
  • Decrease energy consumption
  • Improve strength with less water
  • Accelerate initial setting time
  • Deliver higher strength cement

*Reflects GCP internal estimates