Batch Materials

All raw materials are continuously subjected to a thorough analysis. Any fluctuations in the raw materials are taken into consideration when calculating the weighed-in quantities of the batch. 

The batch house is solely responsible for the raw materials and cullets. Through cooperation with the Purchasing, the Research and Development, and the Melting Departments, a reliable supply of materials for the melting process is ensured. The computer-assisted calculation of the glass batch. 

heating oil, and electricity are used for heating the tank [3.43, p. 208]. Depending on the tank range, electricity or fossil fuels are preferred. The combustion air is preheated by the waste gas via heat exchangers in order 

---

Batch materials Weight, kg SiOj Oxides A1203 supphed, kg CaO Na O FeO LOI, " kg... 

Liquid should be direc ted into the batch materials and not onto bare mixer surface since this could cause buildup. Nozzle spray pressure should be sufficient to penetrate the batch but not so high as to cause heavy splashing. The hquid should be added to the well-mixed... 

Calculate the time required to cool the batch described in Example 7-12 if an external heat exchanger with a heat transfer surface of 200 ft (18.58 m ) is available. The batch material is circulated through the exchanger at the rate of 25,000 Ib/hr (11,339.8 kg/hr). The overall... 

BATCH MATERIAL BALANCE EQUATIONS FOR FREE-RADICAL POLYMERIZATIONS AND COPOLYMERIZATIONS... 

When the viscosity is correct (and NCO, if tested), discharge the batch under slight positive pressure. Label batched material. 

Small particle sizes of raw batch materials accelerate melting and homogenization via an increase in the reaction area between raw materials. However, the use of very fine raw materials has an associated dusting problem along with the added cost of particle size reduction. In the following, simultaneous thermal analysis in conjunction with x-ray diffraction were used to determine the fusion path in a typical glass composition as a function of particle size. 

Some systems such as financial management systems will have no impact on GxP unless they contain special functionality that can affect GxP data. Examples would be the use of a zero price to indicate that a product should not be supplied to a particular market/customer. Another example would be financial material reconciliation affecting batch materials usage data. Even if a computer system is not deemed wholly non-GxP, it does not imply that general quality assurance principles are no longer applicable. Good business sense dictates that a quality management approach should always be applied such as TicklT, IEEE, SWEBOK. 

These compositions are for glass for every day use. The batch materials for soda-lime glasses are easily available at reasonably moderate cost. These materials readily meet at moderate temperatures. These glasses have a relatively high thermal expansion coefficient and only moderate resistance to attack by a contained product. 

---