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PHOSPHATE ORE PRE-REACTION WITH ACIDIC PROCESS WATER

Citation

Warner, Theodore. (2016). PHOSPHATE ORE PRE-REACTION WITH ACIDIC PROCESS WATER. Theses and Dissertations Collection, University of Idaho Library Digital Collections. https://www.lib.uidaho.edu/digital/etd/items/warner_idaho_0089n_10768.html

Title:
PHOSPHATE ORE PRE-REACTION WITH ACIDIC PROCESS WATER
Author:
Warner, Theodore
Date:
2016
Keywords:
Acid Carbonate Gypsum Ore Phosphate Phosphoric
Program:
Chemical and Materials Science Engineering
Subject Category:
Chemical engineering; Mineralogy; Mining
Abstract:

This study evaluated the use of phospho-gypsum pond water to pre-react phosphate ore associated with phosphoric acid production via the wet process. The objective was to improve phosphate recovery and aid in the management of pond water inventory. The non-catalytic heterogeneous solid-liquid reaction kinetics were examined associated with carbonate in the ore and the acidic phosphate, fluoride and sulfate present in pond water. Additionally, the sedimentation and dewatering characteristics of phosphate ore slurry were evaluated to determine the feasibility of recovering neutralized pond water and returning ore slurry back to an acceptable solids concentration ready for acidulation with sulfuric acid. The reaction kinetics between acidic process water and phosphate ore exhibited zero and first order reaction behavior and Arrhenius temperature dependence. Additionally a mixture of hydro-cyclones, gravity thickening and centrifugation proved to be feasible options for separating neutralized process water effluent and re-concentrating phosphate ore slurry.

Description:
masters, M.S., Chemical and Materials Science Engineering -- University of Idaho - College of Graduate Studies, 2016
Major Professor:
Utgikar, Vivek
Committee:
Zhao, Haiyan; Dakins, Maxine
Defense Date:
2016
Identifier:
Warner_idaho_0089N_10768
Type:
Text
Format Original:
PDF
Format:
application/pdf

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