Method for preparing ammonium tetramolybdate by treating molybdenum-rich wastewater and waste slag
A technology of ammonium tetramolybdate and ammonium molybdate, applied in chemical instruments and methods, molybdenum compounds, inorganic chemistry and other directions, can solve the problems of high consumption of easily decomposable chemicals, poor application prospects, large energy consumption for evaporation and concentration, etc. Achieve the effect of improving molybdenum conversion rate and molybdenum resource utilization, eliminating inventory pressure and low equipment investment
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Embodiment 1
[0037] Step 1. Concentrate the molybdenum calcine washing wastewater. The concentration of main metal ions in the concentrated wastewater is: Mo93.54g / L, Cu0.12g / L, Fe3.29mg / L, K0.27g / L, Na0.18g / L L, Ca0.91mg / L, Mg3.50mg / L; Then the acid precipitation and crystallization mother liquor in the molybdenum calcination washing waste water after the concentration and ammonium molybdate production process are mixed uniformly by the volume ratio of 1: 1, obtain mixed solution, The main metal ion concentrations in the acid precipitation mother liquor are: Mo6.06g / L, Cu0.006g / L, Fe1.09mg / L, K0.074g / L, Na0.17g / L, Ca0.021g / L, Mg0.04mg / L L;
[0038]Step 2. Add molybdenum calcined sand to the water-washed molybdenum calcined sand ammonia immersion waste residue with a mass percentage content of 21.7%. The main metal mass content in the molybdenum calcined sand is: Mo63.38%, Cu0.09%, Fe1.18 %, K0.07%, Na0.018%, Ca0.25%; then add the water-washed molybdenum calcine ammonia leaching waste sla...
Embodiment 2
[0047] Step 1. Concentrate the molybdenum calcine washing wastewater. The concentration of main metal ions in the concentrated wastewater is: Mo90g / L, Cu0.13g / L, Fe3.28mg / L, K0.27g / L, Na0.15g / L, Ca0.90mg / L, Mg3.50mg / L; Then the concentrated molybdenum calcine washing waste water and the acid precipitation crystallization mother liquor in the ammonium molybdate production process are mixed uniformly at a volume ratio of 1:0.5 to obtain a mixed solution, and the acid precipitation The main metal ion concentrations in the mother liquor are: Mo6.06g / L, Cu0.006g / L, Fe1.09mg / L, K0.074g / L, Na0.17g / L, Ca0.021g / L, Mg0.04mg / L;
[0048] Step 2. Add molybdenum calcine to the water-washed molybdenum calcine ammonia immersion waste residue with a mass percentage content of 30%. The main metal mass content in the molybdenum calcine is: Mo63.35%, Cu0.088%, Fe1.15 %, K0.08%, Na0.018%, Ca0.275%; then add the water-washed molybdenum calcine ammonia leaching waste slag added with molybdenum calci...
Embodiment 3
[0057] Step 1. Concentrate the molybdenum calcine washing wastewater. The concentration of main metal ions in the concentrated wastewater is: Mo95g / L, Cu0.15g / L, Fe3.32mg / L, K0.29g / L, Na0.15g / L, Ca0.88mg / L, Mg3.42mg / L; Then the acid precipitation crystallization mother liquor in the production process of molybdenum calcination after concentration is mixed with the acid precipitation crystallization mother liquor in the production process of ammonium molybdate by the volume ratio of 1: 2, obtains mixed solution, acid precipitation The main metal ion concentrations in the mother liquor are: Mo6.06g / L, Cu0.006g / L, Fe1.09mg / L, K0.074g / L, Na0.17g / L, Ca0.021g / L, Mg0.04mg / L;
[0058] Step 2. Add molybdenum calcined sand to the water-washed molybdenum calcined sand ammonia immersion waste residue with a mass percentage content of 15%. The main metal mass content in the molybdenum calcined sand is: Mo63.38%, Cu0.09%, Fe1.18 %, K0.07%, Na0.018%, Ca0.25%; then add the water-washed molybd...
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