Fundamentals of the Wet-Process Phosphoric Acid Production. 1. Kinetics and Mechanism of the Phosphate Rock Dissolution

1996 ◽  
Vol 35 (11) ◽  
pp. 4328-4335 ◽  
Author(s):  
Sergey V. Dorozhkin
Keyword(s):  
Phosphoric Acid ◽  
Acid Production ◽  
Phosphate Rock ◽  
Kinetics And Mechanism ◽  
Wet Process ◽  
Phosphate Rock Dissolution

Distribution of natural radionuclides during the processing of phosphate rock from Itataia-Brazil for production of phosphoric acid and uranium concentrate

2000 ◽  
Vol 88 (9-11) ◽  
Author(s):  
H.T. Fukuma ◽  
E.A.N. Fernandes ◽  
A.L. Quinelato
Keyword(s):  
Solvent Extraction ◽  
Phosphoric Acid ◽  
Half Life ◽  
Pilot Plant ◽  
Acid Production ◽  
Phosphate Rock ◽  
Natural Radionuclides ◽  
Wet Process ◽  
Uranium Concentrate ◽  
Uranium Phosphate

A high-uranium phosphate rock from the Itataia deposit, located in the state of Ceará, Brazil, was milled in a pilot plant for wet-process phosphoric acid production. Further processing with solvent extraction (DEHPA/TOPO) was used aiming to recover uranium from the phosphoric acid. The distribution of natural radionuclides with long physical half-life of the

scholarly journals Studies on the transformation of calcium sulphate dihydrate to hemihydrate in the wet process phosphoric acid production

2012 ◽  
Vol 14 (2) ◽  
pp. 80-87 ◽  
Author(s):  
Barbara Grzmil ◽  
Bogumił Kic ◽  
Olga Żurek ◽  
Konrad Kubiak
Keyword(s):  
Phase Composition ◽  
Phosphoric Acid ◽  
Diffraction Analysis ◽  
Acid Production ◽  
Phosphate Rock ◽  
Calcium Sulphate ◽  
Industrial Plant ◽  
X Ray Diffraction ◽  
X Ray ◽  
Wet Process

Studies on the transformation of calcium sulphate dihydrate to hemihydrate in the wet process phosphoric acid production The influence of the process temperature from 85°C to 95°C, the content of phosphates and sulphates in the wet process phosphoric acid (about 22-36 wt% P2O5 and about 2-9 wt% SO42-) and the addition of αCaSO4·0.5H2O crystallization nuclei (from 10% to 50% in relation to CaSO4·2H2O) on the transformation of calcium sulphate dihydrate to hemihydrate has been determined. The wet process phosphoric acid and phosphogypsum from the industrial plant was utilized. They were produced by reacting sulphuric acid with phosphate rock (Tunisia) in the DH-process. The X-ray diffraction analysis was used to determine the phase composition and fractions of various forms of calcium sulphates in the samples and the degree of conversion of CaSO4·2H2O to αCaSO4·0.5H2O and CaSO4. It was found that the transformation of CaSO4·2H2O to αCaSO4·0.5H2O should be carried out in the presence of αCaSO4·0.5H2O crystallization nuclei as an additive (in the amount of 20% in relation to CaSO4·2H2O), at temperatures 90±2°C, in the wet process phosphoric acid containing the sulphates and phosphates in the range of 4±1 wt% and 27±1 wt%, respectively.

scholarly journals Rare-earth leaching from Florida phosphate rock in wet-process phosphoric acid production

2017 ◽  
Vol 34 (3) ◽  
pp. 146-153 ◽  
Author(s):  
H. Liang ◽  
P. Zhang ◽  
Z. Jin ◽  
D. DePaoli
Keyword(s):  
Rare Earth ◽  
Phosphoric Acid ◽  
Acid Production ◽  
Phosphate Rock ◽  
Wet Process ◽  
Florida Phosphate

Overview of Current Phosphoric Acid Production Processes and a New Idea of Kiln Method

2020 ◽  
Vol 17 ◽  
Author(s):  
Guangya Zheng ◽  
Jupei Xia ◽  
Zhengjie Chen
Keyword(s):  
Phosphoric Acid ◽  
Acid Production ◽  
Phosphate Rock ◽  
Low Grade ◽  
Production Methods ◽  
Production Processes ◽  
Major Equipment ◽  
Development Prospects ◽  
Great Competitiveness

: China primarily contains medium and low-grade phosphorus ores that are used to produce phosphoric acid. Here, we provide an overview of phosphoric acid production processes, including wet, thermal, and kiln methods, as well as the fundamental principles, major equipment, and technological aspects of each process. Progress in the kiln method using lowgrade phosphate rock is described, which involves the KPA and CDK processes. The literature shows that the addition of admixtures adds great competitiveness to kiln phosphate production methods and has considerable development prospects.

Water–Phosphorus Nexus for Wet-Process Phosphoric Acid Production

2018 ◽  
Vol 57 (20) ◽  
pp. 6968-6979
Author(s):  
Hang Ma ◽  
Xiao Feng ◽  
Chun Deng
Keyword(s):  
Phosphoric Acid ◽  
Acid Production ◽  
Wet Process

Effect of Surfactants on Phosphogypsum Crystallization and Filtration during Wet-Process Phosphoric Acid Production

2000 ◽  
Vol 35 (3) ◽  
pp. 395-410 ◽  
Author(s):  
H. EL-SHALL ◽  
E. A. ABDEL-AAL ◽  
B. M. MOUDGIL
Keyword(s):  
Phosphoric Acid ◽  
Acid Production ◽  
Wet Process

scholarly journals Evaluation of Saudi Phosphate Rocks for Wet Process Phosphoric Acid Production

1992 ◽  
Vol 4 (1) ◽  
pp. 33-44 ◽  
Author(s):  
T.F. Al-Fariss ◽  
H.O. Ozbelge ◽  
F.A. Abdel Aleem ◽  
S.M. Abdulrazik
Keyword(s):  
Phosphoric Acid ◽  
Acid Production ◽  
Phosphate Rocks ◽  
Wet Process
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