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steel slag new raymond mill

Raymond Mill Steel Slag Steel steel bessemer steel bulk steel production was made possible by henry bessemer in 1855 when he obtained british patents for a pnmatic steelmaking process a similar process is said to have been used in the united states by william kelly in 1851 but it was not patented until 1857 bessemer used a pearshaped vessel lined with ganister a refractory material containing silica

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