Category Archives: bulk solids handling Archive

Can you go with the Flow? Solids Flowmeters for Industrial Applications

By M. Morrissey Solids flowmeters are an interesting solution to indicate flow rates in pipes and chutes. “Interesting” because they are only moderately accurate, costly, require a lot of tuning after installation and are usually only as good as the whole process around them. Nevertheless, the technology exists – because there isn’t anything else that can do the job. Continue reading Can you go with the Flow? Solids Flowmeters for Industrial Applications

A Clean Affair: Sewage Sludge Transport with the Tube Chain Conveyor

The ever increasing amount of sewage sludge from waste management companies poses a major challenge for mechanical materials handling. The hermetically sealed tube chain conveyor system provides for the safe, gas-tight, and odorless transport of sewage sludge. Continue reading A Clean Affair: Sewage Sludge Transport with the Tube Chain Conveyor

Cost Optimisation in Grain Storage: Silo management for Grain Mills and their Customers

By S. Hadraschek – Reducing logistic costs is of paramount interest in todays grain and flower handling. The combined hard- and software solution presented hereafter can help to simplify the control and order process. Continue reading Cost Optimisation in Grain Storage: Silo management for Grain Mills and their Customers

Load Stability of Bulk Cargoes during Ship Transport

By A.W. Roberts, T. Krull, K.C. Williams The safe ocean transport of bulk cargoes on large bulk ships is vitally dependent on the stability of the cargo under the influence of the rolling, pitching and yawing motion of the ship and the transmission of vibration from the ship’s engine and propulsion machinery as well as wave motion induced whipping. Safety standards for ship transport are set by such bodies as the International Maritime Organisation with recommended tests for the assessment of bulk ores deemed suitable for safe ship transport. These test procedures are somewhat empirical and take no account of the well established and proven flow property tests, analysis and design methodologies widely accepted in field of bulk solids handling. These matters are discussed in this article. The stress states in loaded bulk cargoes are examined with respect to the establishment of maximum limits for surface rill angles as a function of a ship’s roll angles. Continue reading Load Stability of Bulk Cargoes during Ship Transport

Bag House Operation Problems: Failure Patterns, Problem Identification and Solutions

By G. Rathwallner More stringent air-pollution laws are drawing more attention to the off gas cleaning facilities of industrial and power plants. Nowadays, bag filters are gaining more and more attention also in medium and high temperature applications. Typical problems arising from physical function and chemical impact will be featured in this article. Continue reading Bag House Operation Problems: Failure Patterns, Problem Identification and Solutions

Tough Shredder Application: Sims Metal Management selects 3 MW WEG Motor for Replacement

By M. Lukaszczyk– Designed to fit into the exact footprint of the legacy OEM equipment, the new motor was the most cost effective option available for the giant shredder that processes over 1000 tonnes of scrap per day. Continue reading Tough Shredder Application: Sims Metal Management selects 3 MW WEG Motor for Replacement

Heavy Duty Brakes: Improving Reliability and Life Span of Braking Designs

By P. Harvey – From marine and mining to metal working and paper processing, heavy duty braking system are required to perform with precise controlled force. Quality is of the upmost importance in these products as the cost of a short service life can often be extremely high. Continue reading Heavy Duty Brakes: Improving Reliability and Life Span of Braking Designs

High Size Reduction Ratios: Cage Mill Working Principles and Performance Factors

By E. Marcotte Cage Mills are internally fed impactors that can crush, grind or pulverize many different materials to specified degrees of fineness. They are characterized by a high ratio of size reduction after a single pass through the cages and easy maintenance. Continue reading High Size Reduction Ratios: Cage Mill Working Principles and Performance Factors

A descriptive Explanation of the Belt Tracking Properties of Pulleys by using the geometric Properties of the flat Pattern of their Surface

By G.A. Kribitz The direction of a conveyor belt is changed, at pulleys, according to the wrap angle between the pulley and the belt. Compared with idler rollers which just support a conveyor belt, pulleys, due to the wrapping belt, provide different opportunities concerning belt tracking. Due to relatively high belt tensions and wrap angles combined with the according friction factors, pulleys mainly provide static friction to the conveyor belt at the ongoing side [1]. There are different hypotheses available in literature for the explanation of belt tracking and belt misalignment effects concerning pulleys, but apparently none seems to be accepted to be generally valid. Continue reading A descriptive Explanation of the Belt Tracking Properties of Pulleys by using the geometric Properties of the flat Pattern of their Surface

Creating Value from Overburden: Valuable Rock Grade obtained from Contaminated Feed Material

By R. Schmid The new dry process clay adhesions from screen waste produced in quarries and gravel pits. Operators report that they are able to convert more than 90 % of contaminated feed material into salable rock grade using the ‘Combimix’ system. Continue reading Creating Value from Overburden: Valuable Rock Grade obtained from Contaminated Feed Material