A method for suppressing phosphorus leaching in uranium ore
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A uranium ore and leaching technology, applied in the field of uranium ore processing, can solve the problems of blocking resin pores, adverse effects, and high phosphorus concentration, and achieve the effects of reducing phosphorus concentration, reducing leaching acid consumption, and facilitating treatment
Active Publication Date: 2014-07-23
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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Problems solved by technology
In above-mentioned leaching process, phosphorus is very easy to leach, causes the concentration of phosphorus in the leachate to be very high, to ion exchange
Uranylphosphateprecipitation is easy to form during the adsorption and washing process, which not only blocks the pores of the resin, but also affects the
Adsorption and leaching of uranium, and affect the quality of uranium products
Method used
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Effect test
Embodiment 1
[0025] The uranium grade in the phosphorus-containing uranium ore was 0.185%, and the phosphorus pentoxide grade was 1.60%.
Adopt the method for phosphorus leaching in the suppression uranium ore of the present invention to extract uranium, concrete steps are as follows:
(1) phosphorus-containing uranium ore is crushed to ore granularity and is-60 order;
The extraction temperature is 60°C, the leaching time is 6 hours, and the liquid-solid ratio is 2:1L / kg;
10.0%, the quality of pyrolusite added is 3% of the quality of phosphorus-containing uranium ore, and the quality of divalent iron ions added in ferroussulfate is
3% of the mass of phosphorus-containing uranium ore;
(3) carry out solid-liquid separation to the leach pulp of step (2) gained;
[0030] (4) The solution obtained in step (3) is ion-exchanged to extract uranium (for ...
Embodiment 2
[0033] The uranium grade in the phosphorus-containing uranium ore was 0.185%, and the phosphorus pentoxide grade was 1.60%.
Adopt the method for phosphorus leaching in the suppression uranium ore of the present invention to extract uranium, concrete steps are as follows:
(1) phosphorus-containing uranium ore is crushed to ore granularity and is-60 order;
(2) adding sulfuric acid, sodiumchlorate, ferrous sulfate to step (1) gained phosphorus-containing uranium ore and leaching; Wherein, leaching
The extraction temperature is 80°C, the leaching time is 6 hours, and the liquid-solid ratio is 2:1L / kg;
10.0%, the quality of sodiumchlorate added is 3% of the quality of phosphorus-containing uranium ore, and the quality of divalent iron ions added in ferrous sulfate is
3% of the mass of phosphorus-containing uranium ore;
(3) carry out solid-liquid separation to the leach pulp of step (2) gained;
[0038] (4) The solution obtained in step (3) is subjected to solvent extract...
Embodiment 3
[0041] The uranium grade in the phosphorus-containing uranium ore was 0.991%, and the phosphorus pentoxide grade was 2.15%.
[0046] (4) The solution obtained in step (3) is subjected to solvent extraction to extract uranium.
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Abstract
The object of the present invention is to provide a method for inhibiting the leaching of phosphorus in uranium ore, which comprises the steps of: (1) crushing the phosphorus-containing uranium ore until the ore particle size is -32 mesh to -200 mesh; (2) to step (1) adding sulfuric acid, oxidant, ferrous ions or ferric ions to the obtained phosphorus-containing uranium ore for leaching; (3) performing solid-liquid separation on the leached pulp obtained in step (2); (4) separating the obtained uranium from step (3) The solution is subjected to ion exchange or solvent extraction to extract uranium. In the present invention, by adding ferric ions or ferric ions and an oxidizing agent to the reaction material, and increasing the reaction temperature, the dissolved phosphate ions re-form iron phosphateprecipitation and exist in the leaching residue, thereby inhibiting the leaching of phosphorus .
Description
A method for inhibiting phosphorus leaching in uranium ore Technical field [0001] The invention belongs to the technical field of uranium oreprocessing, in particular to a method for suppressing phosphorus leaching in uranium ore. Background technique Existing phosphorus-containing uranium ore leaching process is usually: the uranium ore that will be broken into certain particle size is placed in reactor, adds Add leaching agent and oxidant, react at a certain temperature for a period of time, separate the pulp from solid to liquid, and use ion exchange Extraction of uranium by exchange or solvent extraction. In above-mentioned leaching process, phosphorus is very easy to leach, causes the concentration of phosphorus in the leachate to be very high, to ion exchange Recycling uranium has adverse effects. Uranylphosphateprecipitation is easy to form during the adsorption and washing process, which not only blocks the pores of the resin, but also affects the Uranium...
Claims
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Application Information
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Patent Type & AuthorityPatents(China)
IPC IPC(8): C22B3/08C22B60/02
Inventor王高山钟平汝李铁球常喜信王聪颖马伶福
OwnerBEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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