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Uranium problem in production of wet phosphoric acid

Abstract

The balance of the uranium in the wet dihydrate method was presented. This balance shows that a large quantity of the uranium compounds shift from mineral phosphate rock to liquid phase of decomposition pulp (about 70-85% U) and the rest moves to phosphogypsum (about 15-25% U). The contents of uranium in phosphate rock imported for our country and in products and by-products of the fertilizer industry, were determined. Concentration of uranium in the phosphogypsum is dependent on the type of mineral rock and the process of phosphogypsum crystallization. Analysis of the uranium contents in phosphogypsum samples and results of the sedimentation analysis indicated influence of the specific surface of phosphogypsum crystals on the uranium concentration. Investigation of the sets of samples obtained in the industrial plant proved that phosphogypsum cake washed counter-currently on the filter contained from 10 to 20 ..mu..g U/g. The radioactivity of these samples fluctuated from 35 to 60 pCi/g. Using solution sulphuric acid of concentration in range 2-4% by weight H/sub 2/SO/sub 4/ to washing and repulpation of the phosphogypsum enables to reduce its radioactivity to level below 25 pCi/g. This processing makes possible to utilize this waste material in the building industry. Extraction of uranium  More>>
Authors:
Gorecka, H; Gorecki, H [1] 
  1. Politechnika Wroclawska (Poland)
Publication Date:
Jan 01, 1980
Product Type:
Conference
Reference Number:
AIX-14-749313; EDB-83-092743
Resource Relation:
Journal Name: Pr. Nauk. Akad. Ekon. im. Oskara Langego Wroclawiu; (Poland); Journal Volume: 159; Conference: Conference on inorganic phosphorous compounds, Wroclaw (Poland), 24 - 25 Sep 1980
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; URANIUM; RECOVERY; SOLVENT EXTRACTION; CHEMICAL COMPOSITION; FERTILIZER INDUSTRY; GYPSUM; HYDROCARBONS; LEACHING; PHOSPHORIC ACID; PHOSPHORITES; PURIFICATION; RADIOACTIVITY; SULFURIC ACID; URANYL PHOSPHATES; WASHING; ACTINIDE COMPOUNDS; ACTINIDES; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CALCIUM SULFATES; CLEANING; DISSOLUTION; ELEMENTS; EXTRACTION; HYDROGEN COMPOUNDS; INDUSTRY; INORGANIC ACIDS; METALS; MINERALS; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHOSPHATE ROCKS; PHOSPHATES; PHOSPHORUS COMPOUNDS; ROCKS; SEDIMENTARY ROCKS; SEPARATION PROCESSES; SULFATE MINERALS; SULFATES; SULFUR COMPOUNDS; URANIUM COMPOUNDS; URANYL COMPOUNDS; 050400* - Nuclear Fuels- Feed Processing; 400105 - Separation Procedures
OSTI ID:
6406768
Country of Origin:
Poland
Language:
Polish
Other Identifying Numbers:
Journal ID: CODEN: PNAWD
Submitting Site:
HEDB
Size:
Pages: 253-263
Announcement Date:

Citation Formats

Gorecka, H, and Gorecki, H. Uranium problem in production of wet phosphoric acid. Poland: N. p., 1980. Web.
Gorecka, H, & Gorecki, H. Uranium problem in production of wet phosphoric acid. Poland.
Gorecka, H, and Gorecki, H. 1980. "Uranium problem in production of wet phosphoric acid." Poland.
@misc{etde_6406768,
title = {Uranium problem in production of wet phosphoric acid}
author = {Gorecka, H, and Gorecki, H}
abstractNote = {The balance of the uranium in the wet dihydrate method was presented. This balance shows that a large quantity of the uranium compounds shift from mineral phosphate rock to liquid phase of decomposition pulp (about 70-85% U) and the rest moves to phosphogypsum (about 15-25% U). The contents of uranium in phosphate rock imported for our country and in products and by-products of the fertilizer industry, were determined. Concentration of uranium in the phosphogypsum is dependent on the type of mineral rock and the process of phosphogypsum crystallization. Analysis of the uranium contents in phosphogypsum samples and results of the sedimentation analysis indicated influence of the specific surface of phosphogypsum crystals on the uranium concentration. Investigation of the sets of samples obtained in the industrial plant proved that phosphogypsum cake washed counter-currently on the filter contained from 10 to 20 ..mu..g U/g. The radioactivity of these samples fluctuated from 35 to 60 pCi/g. Using solution sulphuric acid of concentration in range 2-4% by weight H/sub 2/SO/sub 4/ to washing and repulpation of the phosphogypsum enables to reduce its radioactivity to level below 25 pCi/g. This processing makes possible to utilize this waste material in the building industry. Extraction of uranium from the wet phosphoric acid using kerosen solution of the reaction product between octanol -1 and phosphorus pentaoxide showed possibility to recover over 80% of uranium contained in phosphate rock.}
journal = {Pr. Nauk. Akad. Ekon. im. Oskara Langego Wroclawiu; (Poland)}
volume = {159}
place = {Poland}
year = {1980}
month = {Jan}
}