Re: Transport Of Recycled Plastics
If this is post consumer plastic, you will probably have to consider washing and drying the material after shredding and/or granulation. Flotation in a saline solution will do partial density separation for different types of plastic.
Colour separation is a different issue which may affect price received.
In the current market, does the price for the product justify the process? ■
Re: Transport Of Recycled Plastics
Colour separation is a different issue which may affect price received.
In the current market, does the price for the product justify the process?
Thank you for your answer and support. Your suggestion on washing is valid and will be taken into account. Could you detail more on flotation separation, for example, suggest any manufacturer of flotation equipment for this and on the type of separation that may be achieved with this?
The local market price is currently supporting intensive labor separations made by informal reciclers. The idea is to improve on what they are doing. Of course, intensive labor may suffer, but job quality and product quality would improve, still managing to keep many people working.
Thanks again ■
Re: Transport Of Recycled Plastics
The flotation solution must have a specific gravity greater than the plastic which you want to float. A similar concept to coal cleaning operations.
I checked my job file for this project and did not record what the solution additive was. (We were doing material handling but not to do with the plastics washing process) It was not common salt, (sodium chloride), but was something similar which was highly soluable in water.
The floatation tank achieved two objectives, high density plastics and grit were dropped out, and low density plastics, now clean, were skimmed off the top. The tank was similar to a wastewater degritter, a slow speed screw dragged heavies out from the bottom into a waste bin. The surface was skimmed off into another screw which transferred the desirable plastic to a vibrating screen to mechanically shake off as much water as possible, then a pneumatic conveyor system with a dryer before going for extruding into pellets.
The supplier for the floatation tank depends on your budget and location. Where is the project located? Wastewater treatment firms might be interested, but their pricing may mean you will have to put it together on your own. ■
Homogenising The Plastic
After you have perfomed initial seperation of the plastic by broad type you will still need to make the plastic more homogenous to reduce colour and melt flow index variation.
This means that prior to use the plastic will require some sort of blending I have included a hyperlink below to an article published in Solids and Bulk Handling magazine about making recycled plastic homogenous using Zeppelin blending silos.
http://viewer.zmags.com/showmag.php?mid=wprsrs#/page15/
Pages 15, 16 & 18 ■
Re: Transport Of Recycled Plastics
Thanks again, you are very helpful.
The project is in Medelln, Colombia. It is a project with heavy social components, but with the idea of doing it with good engineering, so that the recyclers can work under adequate conditions and with better incomes. ■
Re: Transport Of Recycled Plastics
Thank you very much. The article will also help us. ■
Re: Transport Of Recycled Plastics
eposadar
Your situation seems to require an economical solution without a lot of expensive process equipment. Email your mailing address to me at jim @ hanaar . com, and I will send you some handwritten notes & sketches on the process which may be of assistance.
Since your labour costs are a fraction of North American costs, you could likely do more hand sorting, then granulate, wash, dry and pelletize which will reduce your equipment costs and perhaps eliminate the need for large storage bins. Avoiding film plastic will also make the process more manageable. ■
Re: Transport Of Recycled Plastics
Thank you for your kind and real interest.
I am sending the E-mail and look foward to receive the notes and sketches. ■
You Can Recycle Them
dear sir or madom
this is frieda from intco recycling . you said you have aproblem with the transport of the plastics . may i know , do you have some eps (styrofoam).
we need the compacted eps as the material to make new products if you have eps , why not have them compacted so that we can buy them . by the way , we can offer the recycling machine . our slogan is to make it environmental and profitable to recycl eps
for information about our company please visit www.itcorecycling.com .
my emai is friedali@intco.com.cn ■
Dear Eposadar
There is a technique to homogenize the various types of post-consumer plastic wastes. The process does require pre-sorting and pre-sizing of the plastic types before processing. Then a ratio is put forth and the materials are fed to the process. The end result is a homogenized polymeric compound - without degradation - and with consistent properties, including color and melt flow index. This compound can then be tailored for reuse (reformed) in to specific end-use applications. A consistent supply of the post-consumer waste polymer types is a key criteria in the design for the final reformed product. ■
Re: Transport Of Recycled Plastics
It's an interesting issue that looks to be affecting all sectors of the solid recycling industry. Plastics seperation, even in the UK's costly labour market still looks to require a large percentage of manual seperation. However, with labour costs being lower in South America, manual processing will far outweigh the use of a mechanical seperation process, which in turn would cut overheads associated with power, water, plant and space. ■
We Can Supply You The Whole Production Line For These Plastics
Actually, you'd better crush,wash and dewater the plastic partial before you pack them into silo.
The plastic granules are clean to sell easily, if you pefer to reprocess them, the final product with high quality.
We can supply you the whole recycling line from crushing to storing.
In fact, we are a manufacturer for plastic machines in China. With more than 10year experience in this field, our machines have high quality but reasonable prices.
If you find some meet your demand, please feel free to contact me.
Janet Yip
www.cnxtjx.com
Email:info@cnxtjx.com
T:86-576-88018862
F:86-576-88018872
Skype: jjxinxin ■
Transport of Recycled Plastics
We are helping a local community of about 20 recyclers to design a facility to handle the mixed plastic materials they gather in the streets and garbage sites in such a way that they can be classified, separated and transported to individual production units. Our idea is to mill the materials in some central units, taking them to silos and do pneumatic transporting of the materials from the silos to the individual production units. Do you know of experiences of this kind or manufacturing facilities applied to the handling of about 60 tons per day of these materials? Could you share with us this experiences? Could you comment on our idea? Thanks, ■