link no. 59 customer magazine spun yarn systems - Rieter

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6 LINK 59 . 1 /2012 PRODUCT NEWS Recovering good fibers from blowroom waste Good fibers can easily be recovered from blowroom waste with the Rieter Recycling Line. These raw material savings make a significant contribution to a spinning mill’s operating profits. Fig. 1 The recycling line can simply be added to the existing VARIOline. Blowroom / card waste To fiber separation From central extraction Option: press Processing blowroom waste in the Rieter Recycling Line can make an important contribution here. The basic idea is to recover long fibers from the waste and feed them back into the production line. Depending on the spinning process and the trash content of the cotton, the investment in the additional blowroom machinery pays for itself within a year. The spinning industry continually has to address the following challenges: • availability and cost of raw material • rising energy costs • availability and cost of personnel • financing and payback on investment The recycling line – from the systems supplier As a systems supplier for all four spinning technologies, Rieter offers individually tailored solutions to improve the economics of a spinning mill. One example is the Rieter Recycling Line. This processes and separates the individually collected waste from the different machines in the Rieter VARIOline blowroom line and the cards. This always pays off – not only when raw material is scarce and prices are therefore rising (Fig. 1). Treating cotton from blowroom waste The basic idea of treating blowroom waste is to recover long fibers from the waste. Spinning mill waste is subdivided into two categories for the spinning process: • recyclable waste (fiber length > 12.5 mm) • non-recyclable waste (fiber length < 12.5 mm). The recyclable fibers can be fed back to the blowroom continuously or batchwise after recovery. These fibers can be used as raw material for coarse-count rotorspun yarns and for ring-spun yarns in the medium count range.
WASTE COMPOSITION IN THE BLOWROOM, MEASURED WITH THE SHIRLEY ANALYZER Content [%] Trash content [%] 300 000 200 000 100 000 0 Rotor-spun yarn, Ne 7-10, 1 200 kg/h, 1 assortment, trash content ~3 % Fig. 2 Composition of blowroom waste. Carded ring-spun yarn, Ne 20-30, 1 200 kg/h, 2 assortments, trash content ~8 % Blowroom waste Fiber content [%] Loss [%] COMPOSITION OF FIBER CONTENT IN BLOWROOM WASTE, MEASURED WITH THE ALMETER Content [%] Rotor-spun yarn, Ne 7-10, 1 200 kg/h, 1 assortment, trash content ~3 % Fibers < 12.5 mm [%] Carded ring-spun yarn, Ne 20-30, 1 200 kg/h, 2 assortments, trash content ~8 % Blowroom waste Fibers > 12.5 mm [%] Fig. 3 Composition of fiber content in blowroom waste. POTENTIAL SAVINGS – COTTON > 12.5 MM (WASTE: VARIOLINE) (24 H/D; 350 D/A; COTTON PRICE 2.10 USD/KG) USD p.a 10,00 8,00 6,00 4,00 2,00 0,00 2,00 1,50 1,00 0,50 0,00 Rotor-spun yarn, Ne 7-10, 1 200 kg/h, 1 assortment, trash content ~3 % Fig. 4 Potential savings – cotton > 12.5 mm. Carded ring-spun yarn, Ne 20-30, 1 200 kg/h, 2 assortments, trash content ~8 % Process Joachim Maier Dyrk Saaro LINK 59 . 1 /2012 PRODUCT NEWS Raw material savings Examples are given of raw material savings in two spinning processes: • rotor-spun yarn / carded cotton / Ne 7-10 / staple length 1" / 3 % trash content in the bale • ring-spun yarn / carded cotton / Ne 20-30 / staple length 1 1/8" / 8 % trash content in the bale The adjoining chart shows the expected raw material recovery compared to the aggregate waste from the blowroom line. In this example the composition of the blowroom waste is approx. 80 % trash and 20 % fibers (Fig. 2). The recyclable fiber content is between 75 and 80 %. These good fibers can be fed back into the production line (Fig. 3). Potential savings by a spinning mill The calculation of potential savings has been based on a cotton price of 2.10 USD/kg. When reducing costs by saving raw materials in this way it is quite possible under favorable market conditions for the investment to pay for itself within a short time. In this example, capital expenditure on the additional blowroom machinery for the recycling line amounts to approx. 170 000 USD. Even a relatively simple calculation produces an informative result. If the good fibers recovered during a spinning process for carded ring-spun yarn, for example, have a trash content of 8 %, the investment pays for itself within one year (Fig. 4). 12-103 • Senior Marketing Manager Winterthur joachim.maier@rieter.com Technologe Putzerei Winterthur dyrk.saaro@rieter.com 7
Page 1 and 2: The customer magazine of Rieter Spu
Page 3 and 4: Ready for the Future Recent months
Page 5: On the one hand, we are able to mor
Page 9 and 10: Economy Quality Flexibility 1 2 Hig
Page 11 and 12: Automation in Combing More than 50
Page 13 and 14: Fig. 6 Lap change on the E 76 combe
Page 15 and 16: R 60 - Nm 28 / Ne 17, 100 % COTTON
Page 17 and 18: Fig. 2 With SERVOtrail the roving f
Page 19 and 20: NE 30, 100 % COTTON, KNITTING YARN
Page 21 and 22: 4 spinning systems in the Rieter Sp
Page 23 and 24: Installed rotors [1 000] Fig. 3 Fig
Page 25 and 26: Number of particles/1 000 m Fig 9 F
Page 27 and 28: The higher the grade, the better 6
Page 29 and 30: Innovative Retrofits for Draw Frame
Page 31 and 32: Presentation of the Rieter Award in

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