Effect of mineral composition change on pore blockage in the process of acid in-situ leaching of uranium

Sheng ZENG; Hao LI; Chunguang LI; Jiayin SONG

doi:10.11889/j.0253-3219.2022.hjs.45.120301

Journals >NUCLEAR TECHNIQUES >Volume 45 >Issue 12 >Page 120301 > Article

NUCLEAR TECHNIQUES
Vol. 45, Issue 12, 120301 (2022)

Effect of mineral composition change on pore blockage in the process of acid in-situ leaching of uranium

Sheng ZENG^*, Hao LI, Chunguang LI, and Jiayin SONG

Author Affiliations

School of Resources Environment and Safety Engineering, University of South China, Hengyang 421001, China

show less

DOI: 10.11889/j.0253-3219.2022.hjs.45.120301 Cite this Article

Sheng ZENG, Hao LI, Chunguang LI, Jiayin SONG. Effect of mineral composition change on pore blockage in the process of acid in-situ leaching of uranium[J]. NUCLEAR TECHNIQUES, 2022, 45(12): 120301 Copy Citation Text

show less

Fig. 1. Change of porosity during in-situ leaching

Download full size | View in the Article

Fig. 2. The correlation between mineral composition and porosity

Download full size | View in the Article

Fig. 3. The correlation between mineral composition and uranium leaching

Download full size | View in the Article

Fig. 4. Mineral content changes with time

Download full size | View in the Article

Fig. 5. Uranium concentration varies with time

Download full size | View in the Article

铀矿物组分 Uranium mineral composition	参与反应的主要物质 The main substances involved in the reaction	化学反应 Chemical reaction
石英Quartz	SiO₂	⑴ CaCO₃+2H⁺+SO₄^2-→CaSO₄↓+CO₂↑+H₂O ⑵ MgCO₃+2H⁺→Mg²⁺+CO₂↑+H₂O ⑶ Mg²⁺+H₂O+SiO₂→MgSiO₃↓+2H⁺ ⑷ Fe₂O₃₊6H⁺→2Fe³⁺+6H₂O ⑸ FeO+2H⁺→2Fe²⁺+H₂O ⑹ Fe³⁺+3OH^-→Fe(OH)₃↓ ⑺ Fe²⁺+2OH^-→Fe(OH)₂↓ ⑻ Al₂O₃₊6H⁺→2Al³⁺+6H₂O ⑼ UO₂+2Fe³⁺→UO₂²⁺+2Fe²⁺ ⑽ CaO+2H⁺+SO₄^2-→CaSO₄↓+H₂O ⑾ Al³⁺+3OH^-→Al(OH)₃↓ ⑿ MgO+2H⁺→Mg²⁺+H₂O
白云石Dolomite	CaCO₃、MgCO_3、Fe₂O₃、FeO
方解石Calcite	CaCO₃
黏土矿物Clay mineral	Al₂O₃、MgO、UO₂
矿物杂质Mineral impurities	CaO、Fe₂O₃、FeO、Al₂O₃、MgO、UO₂

Table 1. Chemical reaction in the process of leaching

时间 Time / d	石英 Quartz	方解石 Calcite	白云石 Dolomite	黏土矿物 Clay mineral	矿物杂质 Mineral impurities	硫酸钙 Calcium sulfate	硅酸镁 Magnesium silicate
0	62.5	9.5	17.9	8.0	2.1	0.0	0.0
1	56.4	1.3	2.2	14.4	1.5	14.2	10.0
3	48.6	0.0	1.1	20.4	2.0	17.2	10.7
5	50.9	0.0	0.0	19.0	1.4	18.4	10.3

Table 2. Mineral composition and content (%)

Sheng ZENG, Hao LI, Chunguang LI, Jiayin SONG. Effect of mineral composition change on pore blockage in the process of acid in-situ leaching of uranium[J]. NUCLEAR TECHNIQUES, 2022, 45(12): 120301

Download Citation

Tools

Save the article for my favorites

Paper Information