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Title: Metal phosphate reduction in the presence of gaseous sulfur compounds

Abstract

The phosphorus used for combining with calcium oxide is usually obtained by means of thermally stable acidic or amphoteric oxide additives, i.e., almost only silicon dioxide, aluminum oxide, and aluminum silicate. The reduction of tricalcium phosphate and natural calcium phosphate ores by natural gas in the presence of such additives at an acidity coefficient (C{sub a}) of 1 may be brought to completion in 1-3 h. Increasing the C{sub a} of a charge to 1.5-3 facilitates solid-phase reduction of low-melting phosphate ores and raises the phosphorus vaporization rate. However solid-phase additives in the phosphate and their high consumption increase charge preparation cost and lower equipment efficiency. The purpose of this paper is to study a replacement of solid-phase fluxes by volatiles that can combine with basic oxides. This approach was examined theoretically as to the possibility of replacing solid-phase fluxes by hydrogen chloride and volatile sulfur compounds. The latter is often found in natural gases that could be used in the phosphorus industry without prior purification. 15 refs., 3 figs., 3 tabs.

Authors:
; ;
Publication Date:
OSTI Identifier:
166694
Resource Type:
Journal Article
Journal Name:
Russian Journal of Applied Chemistry
Additional Journal Information:
Journal Volume: 64; Journal Issue: 12; Other Information: PBD: 20 May 1992; TN: Translated from Zhurnal Prikladnoi Khimii; 64: No. 12, 2571-2576(Dec 1991)
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 40 CHEMISTRY; 03 NATURAL GAS; PHOSPHATES; PRODUCTION; CHEMICAL INDUSTRY; SULFUR COMPOUNDS; NATURAL GAS

Citation Formats

Kriklivyi, D I, Klimovich, M A, and Petrovskaya, N A. Metal phosphate reduction in the presence of gaseous sulfur compounds. United States: N. p., 1992. Web.
Kriklivyi, D I, Klimovich, M A, & Petrovskaya, N A. Metal phosphate reduction in the presence of gaseous sulfur compounds. United States.
Kriklivyi, D I, Klimovich, M A, and Petrovskaya, N A. Wed . "Metal phosphate reduction in the presence of gaseous sulfur compounds". United States.
@article{osti_166694,
title = {Metal phosphate reduction in the presence of gaseous sulfur compounds},
author = {Kriklivyi, D I and Klimovich, M A and Petrovskaya, N A},
abstractNote = {The phosphorus used for combining with calcium oxide is usually obtained by means of thermally stable acidic or amphoteric oxide additives, i.e., almost only silicon dioxide, aluminum oxide, and aluminum silicate. The reduction of tricalcium phosphate and natural calcium phosphate ores by natural gas in the presence of such additives at an acidity coefficient (C{sub a}) of 1 may be brought to completion in 1-3 h. Increasing the C{sub a} of a charge to 1.5-3 facilitates solid-phase reduction of low-melting phosphate ores and raises the phosphorus vaporization rate. However solid-phase additives in the phosphate and their high consumption increase charge preparation cost and lower equipment efficiency. The purpose of this paper is to study a replacement of solid-phase fluxes by volatiles that can combine with basic oxides. This approach was examined theoretically as to the possibility of replacing solid-phase fluxes by hydrogen chloride and volatile sulfur compounds. The latter is often found in natural gases that could be used in the phosphorus industry without prior purification. 15 refs., 3 figs., 3 tabs.},
doi = {},
url = {https://www.osti.gov/biblio/166694}, journal = {Russian Journal of Applied Chemistry},
number = 12,
volume = 64,
place = {United States},
year = {1992},
month = {5}
}