ZADCON GMBH

Design of blending beds

Dr.-Ing. Rüdiger Schramm

Diagram of blending-bed stacking, chevron pattern

Dr.-Ing. Rüdiger Schramm

FAM Förderanlagenbau Magdeburg

1 Longitudinal stack by UBE Industries Ltd. Japan Kalimantan cement project, Indonesia, 1996; limestone, clay, gypsum: 700 t/h; bituminous coal: 1200 t/h; mixture of sand and iron ore: 2300 t/h

FAM Förderanlagenbau Magdeburg

2 FAM stacker by KHI Kawasaki Heavy Ind. Ltd. But Son, Vietnam, 2009; limestone: 600 t/h; additives: 250 t/h; clay: 150 t/h

FAM Förderanlagenbau Magdeburg

3 FAM bridge-type reclaimer: Anglo-American Brazil – MCG Mineracao Catalao de Goiás Ltda.; Boa Vista Fresh Rock Project, Brazil, 2013; niobium ore: 450 t/h

FAM Förderanlagenbau Magdeburg

Dr.-Ing. Rüdiger Schramm

4 Blending-bed stack

Dr.-Ing. Rüdiger Schramm

5 Mass ratio of the end cone to the parallel stack

Dr.-Ing. Rüdiger Schramm

6 Calculation of the design of a blending bed

Dr.-Ing. Rüdiger Schramm

Blending beds are used for storage, mixing and homogenisation. For the most frequently used configuration, the longitudinal stack, using the “chevron” stacking variant, a design algorithm on the basis of a computing program is examined. In addition to determining the dimensions, the number of layers necessary for homogenisation is calculated on the basis of our own investigation data. The basic data for the stacking and reclaiming equipment to be used are determined.

B‌lending beds are coming into increasing use in the cement, iron and steel and other industries. A blending bed, in general, has three functions:

Storage serves for stocking of sufficient feed material to assure maintenance of continuous operation during normal circumstances and, simultaneously, for absorbing fluctuations in production

Blending of components is intended to ensure that a certain number of feed materials of diverse chemical and/or physical properties are mixed together in amounts such that a desired composition is then present in the finished blending bed

Homogenisation is...