Category Archives: bulk solids handling Archive

Titans in Texas: Coal for South Texas’ and Northern Mexico’s Power Stations

By M. AdamsM. LinnemannCoal deposits with thin seams and many interlayers can be mined economically by surface miners, which can cut the exact depth of the coal layer and deliver the coal ready for belt conveyance without further crushing. Continue reading Titans in Texas: Coal for South Texas’ and Northern Mexico’s Power Stations

How to achieve a clean Conveyor Path: Innovative Belt Cleaning Technology eliminates Carryback at Cement Plant

By J. Cairns After installing an innovative primary cleaner designed for punishing applications a Detroit cement producer could stop excessive carryback and equipment fouling. With a significant reduction in carryback, spillage, and labor for cleanup, the plant was able to improve work­place safety, lower the cost of operation and see a quick return on investment. Continue reading How to achieve a clean Conveyor Path: Innovative Belt Cleaning Technology eliminates Carryback at Cement Plant

Stresses in Silos Part 2: Stresses in Hoppers – Disturbances to the Stress Distribution

By D. Schulze The first part of the paper on stresses in silos [10] focused on the bulk solid properties with respect to stresses, and the stresses in the vertical part of a silo. The present second part explains the stresses acting in hoppers for filling and emptying conditions. In die ideal case stress distributions are symmetric and uniform. However, in a real silo stresses may change locally, and stresses can be non-uniform along the circumference of a silo. Since this can result in consequences on the stability of a silo, the major sources of disturbances to the stress distribution are outlined. If appropriate, it will be referred to the bulk solid properties explained in part 1 [10]. Continue reading Stresses in Silos Part 2: Stresses in Hoppers – Disturbances to the Stress Distribution

Online Moisture Measurement: Non-Contact NIR Moisture Sensors in Powder and Bulk Solids

By A. Fordham Moisture content varies widely in raw materials, and at different points in production processes, so non-contact moisture measurement is essential for final product quality. Near-Infrared technology offers a perfect solution to this Task. Continue reading Online Moisture Measurement: Non-Contact NIR Moisture Sensors in Powder and Bulk Solids

Why Idlers fail: Quantifying the Effects of Idler Bearing Misalignment on Bearing Life

By G. Shortt Idlers are an essential component of every belt conveyor. They are a rather cheap mass­product which anybody uses, but (almost) nobody takes into account – unless they fail. Following you’ll find some explanation about the reasons of their failure. Continue reading Why Idlers fail: Quantifying the Effects of Idler Bearing Misalignment on Bearing Life

Conveyor Belt Monitoring: New Technologies for the Protection of Conveyor Belting

By A. van Staden In mines and many plants of the processing industry conveyor belts are the lifeline of the production system. It is, therefore, of paramount interest to keep the conveying system up and running and recognise potential hazards (far) ahead of their occurance. Continue reading Conveyor Belt Monitoring: New Technologies for the Protection of Conveyor Belting

Stresses in Silos Part 1: Bulk Solid Properties – Stresses in the Vertical Section

By D. Schulze An important part of bulk solids technology is the understanding of stresses (bulk solid pressures) acting on silo walls which, in turn, is important for the stability of silos. However, the behavior of bulk solids is taught in universities within the frame of mechanical process engineering, or conveying technology, but it is not part of the basic knowledge of all engineers. Therefore, the goal of the present paper is to explain how stresses develop in bulk solids containers such as hoppers or silos. At some instances simplified models are introduced in order to make the understanding of the topic easier for those who are new to bulk solids technology. More details of the matter are presented in [1, 2]. In the first part the behavior of bulk solids which are responsible for the stress conditions in silos and hoppers are outlined, and the stresses developing in a silo’s vertical section are examined. Continue reading Stresses in Silos Part 1: Bulk Solid Properties – Stresses in the Vertical Section

FGD Gypsum Dewatering: A Filter Belt Generation used all over the World

Although the market share of renewable energies has risen exponentially, coal is still the base for more than 40% of the world’s electricity production. In recently built plants, flue gas desulphurisation is a standard. For further processing of the herewith produced gypsum sludge effective dewatering is of paramount importance. Continue reading FGD Gypsum Dewatering: A Filter Belt Generation used all over the World

Dust-free Ship-Unloading: Loading Chutes for clean and safe Transfer of Cement

By H. Wichers – Cement is a bulk material handled in charges of tens of thousand tons down to bags of a few kilogram. The bulk transport in ships needs a high-performance transfer system, which, if need be, can change between various unloading points. Continue reading Dust-free Ship-Unloading: Loading Chutes for clean and safe Transfer of Cement

Overcoming a Mines Embankment: IPCC-system with new Belt Conveying Concept for steep Opencast Minewalls

By A. Minkin, F.-M. Wolpers, T. Hellmuth – In order to allow for a continuous high capacity conveying system out of steep walled open pit mines Thyssenkrupp together with Contitech and Siemens developed the Chevron Megapipe conveyor with an up to 900 mm outer diameter. The pipe belt features highest tensile strength as well as a ribbed carrying side to hinder the transported bulk material from rolling back. Continue reading Overcoming a Mines Embankment: IPCC-system with new Belt Conveying Concept for steep Opencast Minewalls