Calculation of the Ore Mixture or Burden for a Blast Furnace. [Volume: 8, Issue: 3, 1889, pp. 130-143]

186 UNITED STATES ASSOCIATION OF

[VOL. 8,

The figures of those columns denoted in the heading as Stoichiometric equivalents evidently show the amounts of ore; flux,
etc., necessary to bring an equal amount of oxygen into the burden, for the composition of a desired silicate. All figures given
in the same column are equal to each other in regard to slag
forming. They show low much of an ore, flux, etc., is necessary
to mix with another without causing an alteration in the oxygen
ratio of the slag produced.
Each basic equivalent gives, with as many acid equivalents as
the oxygen ratio of the slag to be formed requires, a slag of the,
desired oxygen ratio. For singulo-silicate slags each basic equivalent must be combined with one acid equivalent; [columns
18-19] for bisilicate slags each basic with two acid equivalents
[columns 20-21]. The table shows for example that it is possible,
to form a singulo or bisilicate slag from ores Nos. 1 and 2 with,.
out the use of any flux. In both cases Lias ore No. 1 acts as
an acid equivalent, and Spathic ore No. 2 as a basic equivalent.
To form a singulo silicate slag one equivalent or 19.59 parts of
lias ore, is mixed with 12.72 parts or one equivalent of spathie
ore.

Example.
19.59 parts lias ore contain of basic oxygen
19.59 X 0.0321=............
12.72 parts of spathic ore.
12.72 X 0.0845=...........
19.59 parts lias ore contains of acid oxygen
19.59 X 0.0832,......
12.72 parts spathic ore....... 0.629 parts....... 1.075 parts.
1.704 parts....... 1.629 parts.

12.72 X 0.0059,.................. 0.075 parts.
1.704 parts.
To form a bisilicate two equivalents or 2 x 52.62 equals
1(.24 parts of lias ore, are mixed with 12.27 parts of spathic
ore.
Example.
105.24 part lias ore contains of basic oxygen
105.24 X 0.0321,............. 3.378 parts.
12.27 parts spathic ore.
12.27 X 0.0845,............... 1.036 parts.
4.414 parts.