Possibility of using Basic slag for the manufacture of Phosphoric Acid (H3PO4).
Category: Science > Chemistry
Asked by: sensitivecreations-ga
List Price: $20.00
28 Jun 2006 12:15 PDT
Expires: 28 Jul 2006 12:15 PDT
Question ID: 741803
The Penguin dictionary of science by E.B. Uvarov & Alan Isaacs 6th edition 1986 ELBS edition ISBN 0140711260 has described basic slag on page 36 as follows :- ?An impure mixture of Ca4P2O9, CaSiO3, CaO & Fe2O3. A byproduct of steel manufacture, its high Phosphorus content makes it a valuable fertilizer.? We have got basic slag locally tested & found that it contains 18% w/w Phosphorus as (P2O5) & wish to use it as a substitute for imported Rock Phosphate for the manufacture of Phosphoric Acid (H3PO4). Normal process for manufacture of Phosphoric Acid using imported Rock Phosphate having 30% P2O5 is to dissolve Rock Phosphate in 98% H2SO4 and get Phosphoric Acid as the filtrate. However, the problem is that Basic slag doesnot dissolve in 98% H2SO4, may be due to the fusion & bonding of Ca4P2O9 with CaSiO3 in the high temperature zone of the Bessemer Converter! Is there any economically viable process to manufacture Phosphoric Acid (H3PO4) on commercial scale using BASIC SLAG as a substitute for imported Rock Phosphate?
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Re: Possibility of using Basic slag for the manufacture of Phosphoric Acid (H3PO4).
From: rick1968-ga on 14 Aug 2006 10:11 PDT
Actually in Colombia, ACERIAS PAZ DEL RIO S.A, become a program for increase P2O5 in the basic slag, (10% Soluble Neutral Amoniumm Citrate) to 30% P2O5 Soluble in NAC, follow the proceed of mix the colombian rock phosphate (25% P2O5 total) with basic slag of the converters LWS (1.200°C) and CaSiO3, we expect the increase of the P2O5 soluble in N.A.C. Ricardo Florez Escobar Agronomy
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