Wednesday, December 29, 2010

making glass

We can define the glass that means physically harsh in the case of cooling over, does not have a specific melting point and clear. And is of high viscosity to prevent it from gelling.

The chemical: it is the reaction product of inorganic oxides and non-volatile compounds resulting from the dissolution of alkali metals and alkaline earth with sand and Altazjaj know if it is contrary to crystallization, we can consider the glass full article Altazjaj.

Raw materials for glass:

Can be classified into four main categories:

The first category: it is a class of component materials and oxides Calceles fallow and phosphorus.

Category II: and is a class of adjuvants on the melting oxides of sodium and potassium.
The third category: the category of materials and are installed oxides of calcium and magnesium and aluminum, lead and zinc.
Category IV: and is a class of adjuvants and Alantamoan arsenic oxides and titanium, manganese, copper and chromium.
Types of glass:
1 - Vitrified silica
2 - Liquid Glass
3 - hydrogen-lime glass
4 - leaded glass
5 - Boro Silicate Glass
6 - Special Glass
And there are five types of special glass are:
1 - stained glass
2 - transparent glass
3 - safety glass
4 - glass fiber
5 - phosphate glass.
And raw materials adopted in the glass industry are:
Sand - soda - lime - feldspar - borax - breaker.
Glass chemical reactions are:
Na2CO3 + CaCO3 + 6SIO2 ® 2CO2 + Na2O.CaO.6SIO2
And ongoing interactions are:
1 - Na2CO3 + aSio2 ® Na2O. aSio2 + CO2
2 - CaCO3 + bSIO2 ® CaO.bsio2 + CO2
3 - Na2SO4 + aSIO2 + C ® Na2O.aSIO2 + SO2 + CO
Stages of the glass industry:
1 - Preparation of raw materials and raw materials:
Sand taken from the warehouse to the organs of Silicones to separate section for coarse and reducing the proportion of the iron moiety to deliver a candidate in the primary and then to a warehouse of raw materials ready. The carbonate reservoirs shall be taken from the initial to the crushers, which crush the transformation process after the harsh limestone dust.
2 - Weight of raw materials and mixed and fed oven:
The process usually weight for each subject individually so that the discharge in the huge complex to accommodate a full mix so they can be to make the process of mixing and blending the mixture on the entire block and then to go and on conveyor belts to the smelting furnace.
3 - Conducting the smelting process:
Has been the adoption of two types of furnaces in the glass industry are much furnaces and ovens tanks.
Raw materials are supplied continuously and in batches, including:
Sand 300 kg - 105 kg sodium carbonate - 45 kg class
2 kg arsenic trioxide. 30 kg sodium sulfate.
3 kg soft coal. 150 kg breaker. 15 kg of water.

 
And after completion of fusion mixture begin the process of withdrawing the glass to begin the process of its formation according to what we want and according to the mixture flat glass or bottles.
4 - stage thing: after the formation of glass taken outputs of the new exposed to high temperatures and then to be cooled very slowly so as not to be subjected to any heat stress, and so be ready for operations the final polishing and sharpening and decoration to follow the process of decoration on this that are Bmtaba especially the Shi final lift of resistance to print materials.


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