Glass production

Glass production.

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• You have to investigate sources of information, examples and understanding of the material.
• Also, for better achievements, offer you to execute WebQuest, which includes a full internet resources research on the subject.
• This topic about glass production is closely connected with our daily life.

Your main task is first to review the proposed sites and information:

• Then go and read the questions and find the answers to them using the homepage on the subject.
• Make sure that you do your own job with understanding, rather than mechanical writing.

Please, try to find correct answers to the following questions:

1. What is glass made of?
2. What is the temperature at which glass melts?
3. What is the raw materials that go into the manufacturing of clear float glass?
4. What is the first step of glass production?
5. What does the coatings?
6.  What happens after quality inspection? 
7. What does Automated online inspection?
8. What happens, when glass gets to a recycling plant?
9. Where does the molten glass floats? 
10. Why seperation is important?

Here are the links, where you can get acquainted with the subject and its presentation:

• http://www.pilkington.com/pilkington-information/about+pilkington/education/float+process/step+by+step.htm
• https://www.aisglass.com/glass-manufacturing-process
• http://education.seattlepi.com/temperature-glass-melt-recycle-4816.html

ANSWERS: 

1.What is glass made of?

• Glass is made of sand (70%), soda ash and limestone.

2. What is the temperature at which glass melts?

• Between 1,427 and 1,538 degrees Celsius (2,600 and 2,800 degrees Fahrenheit).

3.What is the raw materials that go into the manufacturing of clear float glass?

• SiO2 – Silica Sand
• Na2O – Sodium Oxide from Soda Ash
• CaO – Calcium oxide from Limestone / Dolomite
• MgO – Dolomite
• Al2O3 – Feldspar

4.What is the first step of glass production?

• Melting and refining-fine-grained ingredients, closely controlled for quality, are mixed to make batch, which flows as a blanket on to molten glass at 1,500 oC in the melter.

5.What does the coatings?

• Coatings that make profound changes in optical properties can be applied by advanced high temperature technology to the cooling ribbon of glass.

6. What happens after quality inspection? 

• Cutting to Order:Diamond steels trim off selvedge – stressed edges- and cut ribbon to size dictated by the computer. Glass is finally sold only in square meters.

7.What does Automated online inspection?

• Automated online inspection does two things. It reveals process faults upstream that can be corrected. And it enables computers downstream to steer round the flaws.

8.What happens, when glass gets to a recycling plant?

• Then machines sort and clean the glass before turning it into cullet -- small pieces of crushed glass. 

9.Where does the molten glass floats? 

• In molten tin bath.

10.Why seperation is important?

• Jars and bottles, for example, don't melt at the same temperature as other types of glass, such as light bulbs and mirrors. If you mix jars and bottles with other glass, the recycling process could create new jars and bottles that aren't as strong as they could be. The new products could explode or crack when people try to open them.

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