Second-generation milling equipment from IIT
Latest ‘m’ series fine grinding mills incorporate range of product and technology upgrades
A RANGE of product and technology upgrades have been incorporated in the latest version of new low-energy milling equipment developed for the fine grinding of minerals, hard materials and bulk raw materials.
As part of a programme of continuous product improvement, International Innovative Technologies Ltd (IIT) have further developed their patented ‘m’ series of high-efficiency vertical milling equipment with the introduction of a new second-generation system for high-yield minerals and powder milling applications.
The IIT technology is suitable for the milling of a wide range of natural raw materials and industrial products, such as aluminium oxide, silicon carbide, zirconia, calcium carbonate and limestone products‚ coal‚ fly ash and different types of slag, as well as glass.
The upgraded system now developed by IIT utilizes heavy-duty castings in a range of modular grinding options to meet the needs of different materials, particle size requirements and throughput volumes.
These include a special twin-mill system configuration, utilizing two grinding modules operating in parallel from a common feed, for complete flexibility of material throughput and increased production outputs.
Grinding modules can also be arranged vertically in series for multi-stage milling required for the production of certain grades of material.
The second-generation m-series mills also incorporate pressurized oil cooling and lubrication for extended bearing life, enhanced sealing integrity and the cooling of critical equipment assemblies. In addition, systems can also be provided with forced-air circulation through the mill for product cooling and moisture removal where necessary.
In addition, a number of special features have been introduced to both reduce wear in the mill caused by hard materials and eliminate the danger of contamination of product.
To overcome these problems, the module body is manufactured from heavy-duty austempered ductile cast iron, while internal wear-resistant polyurethane coatings can be incorporated in the inlet and outlet feeds, and a ceramic tile lining used in the grinding module itself.
The compact and powerful centrifugal grinding mechanism of the m-series is extremely efficient with the vertical material flow path and special roller assembly ensuring that the force produced is translated into maximum particle grinding power. To meet the specific requirements of particularly demanding applications and hard minerals, this feature has been further enhanced in the upgraded system with a range of material options for the grinding rollers and rings, including abrasion-resistant tool steels, high chrome iron and ceramic tooling.
Across the full range of m-series mills, new engineering design has enhanced the original modular concept of the technology, with simple access, strip-down and reassembly features allowing fast, in-line maintenance and replacement of the grinding modules when necessary.
IIT mills and classifiers incorporate electronic control and process monitoring systems developed in collaboration with Siemens Industry Sector and Siemens motors, drives and instrumentation systems form an integral part of the milling and materials processing systems.
