$3\mathrm{.}4$ Comment on the following:

a$)$ The effect of slag at New Castle and Vanderbijlpark on the LD

b$)$ The type of refractory lining you would recommend for the two plants

c$)$ The $\text{'}$P$\text{'}$ content in blast furnace iron at New Castle and Vanderbijlpark

$(2)$

d$)$ Vanderbijlpark slag contains $4\mathrm{.}8\%$MnO while New Castle slag does not

$(2)$

e$)$ Vanderbijlpark slag contains $3\mathrm{.}9\%$ iron while New Castle slag does not

$(2)$

$[$Total: $100$ Marks$]$