A hammer mill is a mill whose purpose is to shred or crush aggregate material into smaller pieces by the repeated blows of small hammers. These machines have numerous industrial applications, including:
The basic principle is straightforward. A hammer mill is essentially a steel drum containing a vertical or horizontal rotating shaft or drum on which hammers are mounted. The hammers are free to swing on the ends of the cross, or fixed to the central rotor. The rotor is spun at a high speed inside the drum while material is fed into a feed hopper. The material is impacted by the hammer bars and is thereby shredded and expelled through screens in the drum of a selected size.
Hammer mill apple shredder for juicing.
The hammermill can be used as a primary, secondary, or tertiary crusher.
Small grain hammermills can be operated on household current. Large hammer mills used in automobile shredders may be driven by diesel or electric motors ranging from 2000 to over 5000 horsepower (1.5 - 3.7MW).
The screenless hammer mill uses air flow to separate small particles from larger ones. It is designed to be more reliable, and is also claimed to be much cheaper and more energy efficient than regular hammermills. The design & structure of the hammermill is always determined by the end use.
Historyedit
Water-powered trip hammer mills were created in 488 AD by the medieval Chinese mathematician and engineer Zu Chongzhi which was inspected by Emperor Wu of Southern Qi (r. 482–493 AD).[1][2][3] The water-powered trip hammer mills were powered by minor hill flowing stream that was connected to a large river beneath the high banks.[4]
Types of Hammer Mill Crushersedit
Types of Hammer Mill Crushers can include "up running" and "down running" hammer mills - [5]
"Up Running" - Uses perforated screens or grate bars to reduce soft or hard materials. The material to be reduced determines the rotor construction that can be adjustable based on wear.
"Down Running" - Most suitable for fibrous materials due to the high concentration of shearing action within the unit.
Based on the director of the motor the hammer mills are classified into the following types:
Reversible hammer mill
Non-reversible hammer mill
Although the mills are classified into the above two different types their working and grinding actions of both these types of mill are almost similar. However, their construction differs in various respects. [6]
Trip hammer, which may be housed in a mill usually known as a forge, but which was historically occasionally described as a “hammermill.”
Referencesedit
^Liu, Heping (2002). ""The Water Mill" and Northern Song Imperial Patronage of Art, Commerce, and Science". The Art Bulletin. CAA. 84 (4): 574. doi:10.2307/3177285. JSTOR 3177285.
^Yongxiang Lu, ed. (2014). A History of Chinese Science and Technology, Volume 3. Springer. p. 280. ISBN9783662441664.
^Needham Joseph, ed. (2000). Science and Civilisation in China: Volume 6, Biology and Biological Technology. Cambridge University Press. p. 337. ISBN978-0521632621.
hammermill, this, article, about, modern, milling, machine, historical, mills, that, used, trip, hammers, hammer, mill, paper, manufacturer, paper, company, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding. This article is about the modern milling machine For historical mills that used trip hammers see Hammer mill For the paper manufacturer see Hammermill Paper Company This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Hammermill news newspapers books scholar JSTOR November 2013 Learn how and when to remove this template message A hammer mill is a mill whose purpose is to shred or crush aggregate material into smaller pieces by the repeated blows of small hammers These machines have numerous industrial applications including Ethanol plants grains A farm machine which mills grain into coarse flour to be fed to livestock Fluff pulp defiberizing Fruit juice production Grinding used shipping pallets for mulch Milling grain Livestock poultry and aquatic feed production Sawmills size reduction of trim scrap and planer shavings into boiler fuel or mulchHammer mill for milling grain Desktop hammer mill used for preparing growth media in a life sciences laboratoryShredding paper Shredding scrap automobiles see automotive shredder residue Shredding yard and garden waste for composting Crushing large rocks In waste managementHigh speed industrial hammer mill for waste fragmentationSlow speed horizontal pallet grinderContents 1 Operation 2 History 3 Types of Hammer Mill Crushers 4 See also 5 ReferencesOperation editThe basic principle is straightforward A hammer mill is essentially a steel drum containing a vertical or horizontal rotating shaft or drum on which hammers are mounted The hammers are free to swing on the ends of the cross or fixed to the central rotor The rotor is spun at a high speed inside the drum while material is fed into a feed hopper The material is impacted by the hammer bars and is thereby shredded and expelled through screens in the drum of a selected size nbsp Hammer mill apple shredder for juicing The hammermill can be used as a primary secondary or tertiary crusher Small grain hammermills can be operated on household current Large hammer mills used in automobile shredders may be driven by diesel or electric motors ranging from 2000 to over 5000 horsepower 1 5 3 7MW The screenless hammer mill uses air flow to separate small particles from larger ones It is designed to be more reliable and is also claimed to be much cheaper and more energy efficient than regular hammermills The design amp structure of the hammermill is always determined by the end use History editWater powered trip hammer mills were created in 488 AD by the medieval Chinese mathematician and engineer Zu Chongzhi which was inspected by Emperor Wu of Southern Qi r 482 493 AD 1 2 3 The water powered trip hammer mills were powered by minor hill flowing stream that was connected to a large river beneath the high banks 4 Types of Hammer Mill Crushers editTypes of Hammer Mill Crushers can include up running and down running hammer mills 5 Up Running Uses perforated screens or grate bars to reduce soft or hard materials The material to be reduced determines the rotor construction that can be adjustable based on wear Down Running Most suitable for fibrous materials due to the high concentration of shearing action within the unit Based on the director of the motor the hammer mills are classified into the following types Reversible hammer mill Non reversible hammer millAlthough the mills are classified into the above two different types their working and grinding actions of both these types of mill are almost similar However their construction differs in various respects 6 See also editBlade grinder Trip hammer which may be housed in a mill usually known as a forge but which was historically occasionally described as a hammermill References edit Liu Heping 2002 The Water Mill and Northern Song Imperial Patronage of Art Commerce and Science The Art Bulletin CAA 84 4 574 doi 10 2307 3177285 JSTOR 3177285 Needham Joseph 1965 Science and Civilization in China Vol IV Physics and Physical Technology p 400 ISBN 978 0 521 05802 5 Yongxiang Lu ed 2014 A History of Chinese Science and Technology Volume 3 Springer p 280 ISBN 9783662441664 Needham Joseph ed 2000 Science and Civilisation in China Volume 6 Biology and Biological Technology Cambridge University Press p 337 ISBN 978 0521632621 Company Stedman Machine Up amp Down Running Hammer Mill Manufacturer Stedman Machine Company www stedman machine com Retrieved 2018 10 17 Karma Ankit Hammer Mill Types Uses Operating Principle Components Retrieved 2021 04 23 Retrieved from https en wikipedia org w index php title Hammermill amp oldid 1181003260, wikipedia, wiki, book, books, library,
