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The present invention provides a froth flotation process for the separation of paper and wood fibers from printed and copying inks and other contaminants during the recycling of paper. A liquid solution containing a frothing agent is applied from the top of a froth flotation device, preferably in the form of a spray, to the upper surface or portion of an aqueous pulp slurry present in the
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Abitibi-Consolidated operates six (6) waste paper deinking plants for the production of newsprint, using a variety of process designs and flotation cells. A study comparing the results of each plant’s deinking system performance identified differences in flotation cell operating conditions [1], the effects of which were not well understood
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Flotation deinking has become the process of choice for removing ink from re-pulped paper. Hydrophobic ink particles are removed from the pulp after collection and transport by rising air bubbles
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from horizontal is common for most types of stock. FLOATATION. DEINKING The floatation process for deinking pulp has won great acceptance in Europe due to its high yields and low water usage. The floatation principal was first developed for use in the mining industry for the separation of metallic elements from ore
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Apr 01, 1999 Apr 01, 1999 The significance of deinking technology is mirrored in the development of deinking capacities which rose from 1.5 million to 5.9 million t/year worldwide in the years from 1972 through 1981, and which then further increased almost 3-fold in the following 10 years ().There are currently approximately 600 major deinking systems either operating or under construction
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Continuous cooking Batch cooking Horizontal tube cooking. ... OCC lines Deinking Plants Pilot trials for stock preparation. ... Flotation Technology Bale handling and pulping Cleaning Screening Thickening, clarification and washing Dispersion and refining Bleaching Reject handling
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Valmet OptiDeair Flume wire-water channel removes free air and other gases from the wire water more efficiently than a conventional wire water silo. Developed to meet the challenges of higher gas content resulting from high-speed forming sections, OptiDeair Flume enhances papermaking efficiency as a pre-deaerator before a deaeration tank or as
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Froth flotation is an important separation process in the field of minerals processing as well as in other fields such as paper pulp deinking and wastewater treatments (Aldrich and Feng, 2000
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The system has been successfully tested in a waste water dissolved air flotation (DAF) tank, in a white water de-aeration channel, in a deinking flotation cell Metso OptiCell and in a plastic bead
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Our products has passed the CE&ISO Approved. With the high quality products and excellent after sale service, we have cooperated with more than 25 countries around the world and enjoy good reputation both home and abroad. For us, Customer First, High Quality is Our Obligation, Great Service is
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May 01, 2012 May 01, 2012 Environmental characteristics of the intertidal flat. The Papagaios tidal flat is composed primarily of poorly sorted, very fine to fine sand (Table 1).During the sampling period, the intertidal flat was covered with the green alga Ulva flexuosa and presented high densities of the bivalve Anomalocardia brasiliana.Redox potential discontinuity depth, varying between 1 and 1.5 cm of depth
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Replace Flume with Mechanical Conveyors The base mill for this estimate processes 1200 cords per day of H to 8 foot rough pulpwood, hardwood and softwood, received by rail and truck. The flume, with coarse and fines removal system, is replaced by four (4) 3-chain log conveyors each 200 feet long, in tandem as shown on the flow diagram in Figure 77
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Since wastepaper can be reused, deinking facilities are often pro- vided in the pulp mill. The chemicals used, the procedure followed, 287 - 026 O - 68 - 2 ------- and the equipment employed in the deinking operation may vary consider- ably since the process sequence depends on the composition of the grades of wastepapers used, the character of
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