Batch Compositions

In this module, you can manage all your batch formulae. The raw materials required for glass production are weighed out in certain quantities in accordance with the glass composition and mixed with each other. A batch is therefore understood to be the weighed out ratio of the raw material quantities in the mixed state that is necessary for the production of a glass with a particular composition.

The term batch formula is understood to mean the defined weight of a particular quantity of glass containing the individual components calculated for a previously defined total quantity.

This module offers 2 very interesting calculation possibilities:

• You can convert an existing batch to any value you require (the cullet content remains constant).
• You can have an existing batch formula automatically converted in such a way that the resultant glass batch precisely (taking tolerances into account) meets your requirements (Desired Glass).

Target/actual comparison - glass oxides

As a rule, the calculation of a batch formulae is carried out on the basis of a Desired Glass. The table "Target/actual comparison - glass oxides" shows you whether the required oxide proportions in the Desired Glass have been achieved or not.

The column "Oxide" lists all the oxides contained in the batch formula. Alongside these are the proportions determined in percent. The column "Proportion in Desired Glass" contains the oxide proportions in the Desired Glass used and the fundamental tolerances. For the entries in the table that are marked in colour, the oxide proportions in the Desired Glass do not match the calculated values. In the case of deviations downwards (see arrow), you may need to add additional raw materials to the batch formula.

Evaporation rates

Any number of different evaporation rates can be set. In this way, particular evaporation rates can be selected for each batch formula, each furnace or each glass colour. The following oxides or compounds evaporate in solid form (dust):

SiO2, B2O3 and P2O5, Na2O, K2O, Li2O and Rb2O, TiO2, ZrO2 and SnO2, CaO, MgO, BaO, PbO, SrO, ZnO, CdO, BeO, FeO, MnO, CuO, CoO and NiO, Al2O3, Fe2O3, Cr2O3, As2O3, Sb2O3, Bi2O3 and Ga2O3, As2O5 and Sb2O5, Mn3O4

The anions evaporate in gaseous form from the melt and convert accordingly: SO3...SO2, Cl...HCl, F...HF

The exhaust gas can thus be made up of the following components: CO2, H2O, N2, NO, NO2, SO2, HCl and HF