Peterson Corp. News


Air Separator

The air separator is an optional add-on to any screen, that helps to separate light fraction material like plastics or paper, from heavy fraction material including large wood and rock.

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Fines

Fines are screened material that falls below a minimum standard. This minimum standard is based on the opening size of the screening holes.

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Overs

Overs are oversized material that has not been sized through a particular screen size or star deck opening.

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Moisture Content

The moisture content of both feedstock and chips is dependent on several factors including age of wood, species, and even seasonal weather. Moisture content in feedstock affects how wood is chipped, and machine adjustments may need to be made to account …

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Chip Quality Program

A Chip Quality Program is individually run by suppliers or chip buyers to regularly monitor, assess, and improve chip quality based on the desired output product or the end customers' process.

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Pins

Pins are a classification of undersized chip material which does not meet the chip quality specifications. Pins are long, thin pieces of wood resembling a toothpick or matchstick shape. Pins have shorter fibers and are therefore undesired for pulp. Most paper mills classify …

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Gross Overs

Gross overs are obvious, unacceptable large pieces of wood far outside chip quality parameters. Too long, too thick or both. Gross overs can be removed with screening. When sizing chips, you typically have acceptable chips, fines which fall below acceptable chips, and …

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Fuel Chip

A fuel chip is used for biomass, pellets, and other types of energy/power applications. A fuel chip is often the same as a dirty chip, a chip that is not debarked.

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Fines

Fines are chips that fall below a minimum standard. Fines that exceed the relatively small required percentage of the total chip supply create real problems for pulp mills, such as plugged digester screens, excess chemical absorption, increased load to the recovery boiler, loss …

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Clean Chips

Clean chips are made from contaminant free, debarked, delimbed logs.

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Dirty Chip

Dirty Chips are produced from the entire tree, including the bark. The appearance of the high bark content gives dirty chips their name. A Dirty Chip may also be made from branch wood, leaves or needles, and roots. Dirty chips are typically used …

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Chip Quality Index (CQI)

The Chip Quality Index (CQI) is the measurement which all chips are evaluated against post processing. The CQI is where money is made. By measuring chips against the CQI chip producers can determine value and potential profit based on consistency. To be …

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Chip Thickness

Chip thickness is the measurement of how a chip is split. It is typically well correlated with chip length but not always. Thickness is the principal factor impacting paper pulping effectiveness (liquor or pulping chemical penetration, and time required in …

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Chip Quality

Chip quality is how chips compare to the required standard, although different applications have different specifications. Chip quality is something which is measurable by the predetermined contract size, and the output. Included in it's measurement may be length, thickness, and bark content, …

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Chip Length

Chip Length is the measured dimension of a chip from cut edge to cut edge. Chip length is used to control chip thickness. Longer chips tend to be thicker, shorter chips--thinner.

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Accept Chips (Accepts)

Accept Chips (Accepts) are wood chips that fall within a specified length and thickness size range determined by the buyer or a contract. Accept Chips may also limit bark content to a specified range. A chip sample is often taken and put through a chip …

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Chip Classifier

A chip classifier is a mechanical device used to determine the distribution of chips across a length and thickness range. The most common classifiers use a series of trays with bar slots to sort on thickness and punch plate to …

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