Objective 1) In pneumatic conveying, space charge density is a much more likely control of tribocharging than specific charge on the powder. 2) Where powder has been centrifugally compressed, such as in a cyclone, the greater space charge density close to the pipe wall increases likelihood of powder adhesion. 3) Electrical neutralisers provide a good local discharging effect, whilst additives can be effective at lowering charge throughout powder handling systems. 4) The specific charge of cement after milling or mixing is quite low. Nevertheless, electrical forces seems to affect the efficiency of the milling process, especially with some cement types. 5) High voltage A.C. neutralizers, when properly installed, can substitute partially the liquid milling additive providing the power is adequate for the mill size. 6) Research into new milling additives will reduce power consumption, but the dosification and the efficiency must be determined by laboratory and industrial tests for every mill and every cement type. 7) Segregation of powder mixtures during transport and storage could be an important factor of inhomogeneity. This is very important in relatively coarse powders, i.e. the raw mix.Electrostatic charges are the cause of problems in many industries where powdered materials are manufactured or processed. Electrostatic hazards are now well understood, but powder handling and processing problems still occur which can reduce quality and productivity, leading to inferior products and higher costs. At the root of these difficulties is a lack of understanding of their cause and a lack of appropriate solutions. By focusing attention on specific powder manufacturing difficulties of one of the partners, the group will : - Quality electrostatic problems on plant after adapting and developing suitable multifunction measuring instrumentation - compare various charge control techniques, establish their limitations, make improvements and develop a prototype neutralizer specifically for powders - check the efficiency of these improved charge control techniques both in the laboratory and on site - give the basis for developing a feedback specific neutralizer. Fields of science social scienceseconomics and businesseconomicsproduction economicsproductivity Programme(s) FP2-BRITE/EURAM 1 - Specific research and technological development programme (EEC) in the fields of industrial manufacturing technologies and advanced materials applications (BRITE/EURAM), 1989-1992 Topic(s) Data not available Call for proposal Data not available Funding Scheme Data not available Coordinator Chilworth Technology Ltd EU contribution No data Address Beta House, Chilworth Science Park SO16 7NS Southampton United Kingdom See on map Total cost No data Participants (3) Sort alphabetically Sort by EU Contribution Expand all Collapse all INSTITUT NATIONAL DE L'ENVIRONNEMENT INDUSTRIEL ET DES RISQUES France EU contribution No data Address Parc Technologique Alata See on map Total cost No data LAB OFFICIAL J.M.MADARIAGA Spain EU contribution No data Address See on map Total cost No data Laboratoire Central des Industries Electriques France EU contribution No data Address 33 avenue du Général Leclerc 92260 Fontenay-aux-Roses See on map Total cost No data