basic slag


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basic slag

a furnace slag produced in steel-making, containing large amounts of calcium phosphate: used as a fertilizer

Basic Slag

 

(or Thomas slag), an alkaline phosphorus fertilizer. It is a by-product of the production of steel from phosphorusrich pig iron (see). Basic slag is a dark powder that is insoluble in water and does not cake. It contains not less than 14 percent P205 in citrate-soluble form. Basic slag is most suitable for use on acid soils as a base fertilizer. It is used in the Federal Republic of Germany, France, and Great Britain. It is not produced in the USSR.

basic slag

[′bā·sik ′slag]
(metallurgy)
A slag resulting from the steelmaking process; rich in phosphorus, it is ground and used as a nutrient in grasslands.
References in periodicals archive ?
Two of the slags were melter slag of different particle sizes (PAP5 0-5 mm and APIOB 0-10 mm), while the third slag was basic slag (KOBM) with Ca as free lime (CaO).
Unlike ACIPCO, who perfected the basic slag cupola, Clow, according to Kirgin, was the first company to continually externally desulfurize ductile iron to prepare it for Mg treatment, which is the predominant method used for cupola-melted iron today.
Basic slag practice to achieve a low-sulfur (S), high-carbon (C) base metal was impractical, since we had to melt GI out of the same unit.
By 1968, the basic slag cupola used the continuous porous plug process.
It is widely used in the steel industry as a refractory brick often impregnated with carbon (tar, pitch, graphite) to give optimum properties for corrosion resistance in environments of basic slags, particularly in furnaces or slag lines of treatment ladles.