Cement SCM

Industrial Environmental Applications

Supplementary Cementing Materials (SCM’s) Handling System

Engineered Bulk Materials System for Existing Cement Mix Plants

Equipment & Technology Offered: Bulk Storage Silos for Betocarb (Omya), Fly Ash, Ground Granulated Blast Furnace Slag (GGBFS), Metakaolin Clay, Silica Fume, Quick Lime (CaO) and Ground Post Consumer Glass Pneumatic Conveying Systems and Flow Metering Devices PLC based Electrical Control Systems SCM material flow and convey testing facilities

The Minerals and Metals Program of the Government of Canada Action Plan 2000 on climate change has determined that reduction of Portland Cement levels in cementaceous blends can proportionately reduce the CO2 levels or Greenhouse gases caused by the displaced Portland Cement production. As a result of these studies, cement facility operators are examining the options that exist to them for materials that can be locally substituted for the displaced Portland cement. These materials are commonly referred to as Supplementary Cementing Materials or SCM’s.

Significant raw material cost savings can be realized without the loss of final material performance when observing the substitution limitations and guidelines as dictated by CSA standards. One key to the economics of utilizing a SCM is the local availability of the material and introduction of this SCM in a manner that is non-disruptive to the operator’s existing facility and production.

Specifically, the cement plant operator needs to be able to adapt his existing cement blend facility with new materials handling equipment that is designed to receive, store and deliver the SCM to the existing blending tower with the least amount of modification to the existing blend tower.

Semco Systems Limited, engineers and designs these custom bulk systems to handle the specific SCM that is available locally to the cement plant operator.

Dilute phase pneumatic conveying and bulk storage systems utilize special wear resistant rotary valves to feed the SCM into a closed loop delivery line that delivers the batch weight to the existing blender scaling device. Discharge aid devices mounted on the bottom of the storage silo are specifically engineered for the SCM flow properties. Pressure or vacuum systems are utilized to provide the conveying energy to transport the product. Only a SEMCO scale valve is mounted onto the existing blend tower weigh hopper so that the desired SCM is delivered into the weigh hopper and the conveying air and dust are conveyed and vented back at the bulk silo by the bin vent filter unit. Each system is designed for the particular flow characteristics of the particular SCM which can be determined by laboratory testing in our technical centre located in Mississauga, Ontario.

Semco provides complete SCM material pneumatic system testing, design, build and installation services so that the cement blend plant operator can receive a packaged engineered system as a “turnkey” style project. The system controls can be designed to operate independently or in cooperation with the existing blend plant recipe controls.