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...Manufacturing pfg s float glass process tel www co za chemical composition of silica iron oxide alumina magnesium sodium potasium sulphur trioxide calcium other furnace the batch is fed into and melted at a temperature around c on line cutting ribbon moves annealing lehr to cold end where it annealed gradually cooled washed automatically cut as relieve stresses in travels along rollers prevent splitting breaking phase raw material feed sand bath continuous distribution distributed stacking offloading soda ash dolomite limestone molten floats surface throughout south africa exported automatic stackers offload sulphate cullet are mixed together tin all irregularities regional overseas markets sheets then warehoused form out give hubs springs for flat parallel durban cape town...