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Woodchips are small- to medium-sized pieces of wood formed by cutting or chipping larger pieces of wood such as trees, branches, logging residues, stumps, roots, and wood waste. [ 1 ] [ 2 ] Woodchips may be used as a biomass solid fuel and are raw material for producing wood pulp . [ 3 ]
Mechanical pulp can also be referred to as ground-wood pulp, and the grinding process starts by subjecting wood to an abrading action, either by pressing the wood against a revolving grinding stone or by passing chips through a mill. [10] Pulp grinders are usually powered by electric motors and automatically loaded.
The kraft process (also known as kraft pulping or sulfate process) is a process for conversion of wood into wood pulp, which consists of almost pure cellulose fibres, the main component of paper. The kraft process involves treatment of wood chips with a hot mixture of water, sodium hydroxide (NaOH), and sodium sulfide (Na 2 S), known as white ...
A pulp mill in Rauma, Finland Woodchips for paper production. A pulp mill is a manufacturing facility that converts wood chips or other plant fiber sources into a thick fiber board which can be shipped to a paper mill for further processing. Pulp can be manufactured using mechanical, semi-chemical, or fully chemical methods (kraft and sulfite ...
Wood pulp is the primary market for the woodchipping industry in Australia. [citation needed] The practice, known as woodchipping, was to make use of most of the woody material in a tree to produce wood chips. This was then converted into paper, hardwood pulp is mainly used for printing paper and softwood pulp is added for good quality. [3]
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Refiner mechanical pulp (RMP) is produced by feeding wood chip into the center of a disk refiner, consisting of two grooved discs. Either one disc rotates and the other is stationary, or both are rotating in opposite directions. The wood chips are forced toward the periphery by the centrifugal force and is crushed into pulp between the discs.
Wood chipping is the act and industry of chipping wood for pulp, but also for other processed wood products and mulch. Only the heartwood and sapwood are useful for making pulp. Bark contains relatively few useful fibers and is removed and used as fuel to provide steam for use in the pulp mill. Most pulping processes require that the wood be ...
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