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Foam glass production line
1. Raw materials and Mix
The raw material is basic material and foaming agent. Basic material includes waste glass and other types of glasses. Foaming agent have carbonate compouns such as limestone, magnesium carbonate and dolomite and carbon compound such as activated carbon,silicon carbide titanium carbide. Using that is universal.
Noted that as the foaming agent is different, so the temperature is not same. Making the waste glass and foaming agent powder by BALL GRINDING MILL. The granularity of glass powder is about 60~250um. Foaming agent’s granularity is samller than glass powder. For example, the silicon carbide as foaming agent, its granularity should be controlled from 4um to 7um that is vey important to get homogeneous and large quantities samll air hole.The quanities of foaming agent is 0.2~5% of glass powder and can’t exceed to 10%.Then put that in churn-dasher and to homogenize that, generally put water.Mix uniformity will the quality of foam glass.
2. Foam Process
Mix material will be put in mould to sintering foaming.Then deliver it to roller hearth kiln to process.
The three of foam process as below:
A.preheat B.foaming C.stabilization
The temperature and time depending on the specific formulation of the desired phase determined by experiment.Even though there is no mould, it can adopt that deliver the mix material into tunnel kiln directly to obtain continuous ribbon foam glass by tablet transport device.(the thickness of mix material is about 0.1~0.5mm.) Cutting it in the exit of tunnel kiln then can obtain foam glass blocks.
3. Anneal foam glass
To keep the foam glass strong, so need to anneal foam glass. The Annealing temperature should be control 650℃~250℃.Slowly cooling after keeping warm some time.Cooling speed should be controlled 0.7-1/min.
4. Foam glass coating
It needs to coat organic solderability preservative in the surface of foam glass blocks.
5. Living example
The detailed work flow when silicon carbide as the foaming agent.
Basic material is glass powder and its quanity is 98%,granularity<125um.Silicon carbide powder is 2%,granularity<10um.After adding the right amount of water to fill the openings evenly mixed type mold, mold height is about 30%.Then deliver it to tunnel kiln and increasing the temperature to 650 ℃ that is kept 3hours to glass power with silicon carbide power sintering, then increase temperature to 880 ℃, keep 25 minutes to foam. To keep the stable structure that has obtained, the product need cool fastly below 510℃. To eliminate because of quenching stress, need to increas the temperature to 620 ℃, keep 15minutes then slowly cool to about 480 ℃ and fastly cool to room temperature.You will get high quality foam glass after foam glass coating.
The above is only for your reference and let you know more about foam glass produce principle. We can design and produce the foam glass line for you as your requirements.
Please note that the design of the foam glass plant needs to as the productivity you require.
It is very appreciated if you can tell us the productivity per year.
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