A kind of separation method of antimony and arsenic in antimony arsenic material
A separation method and material technology, applied in the direction of improving process efficiency, can solve the problems of high energy consumption for concentrated crystallization, high reagent consumption, large equipment corrosion, etc., and achieve the effects of improving leaching rate, low raw material cost, and low production cost.
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Embodiment 1
[0035] 1) After mixing 100g of antimony-arsenic material with a particle size of 100 mesh (59.35% of antimony and 20.14% of arsenic) with 106g of sodium peroxide (1.2 times the theoretical value required for the reaction of antimony and arsenic in the antimony-arsenic material), Calcined at 300°C for 5 hours to obtain a calcined product;
[0036] 2) Add water to the calcined product, stir, and carry out leaching at 65 ° C. After leaching for 1 hour, filter to obtain the leaching solution and leaching residue. The leaching residue is about 80% thick sodium metaantimonate, which can be used to prepare high-purity sodium pyroantimonate. Wherein the mass volume ratio of calcined product and water is 1:8g / ml;
[0037] 3) Add calcium oxide to the leaching solution, stir at room temperature, filter after reacting for 5 hours to obtain the filter residue and filtrate, dry the filter residue to obtain the calcium arsenate product, and return the filtrate to step 2), wherein the molar r...
Embodiment 2
[0039] 1) After mixing 100g of antimony-arsenic material with a particle size of 200 meshes (wherein antimony is 41.52%, arsenic 6.85%) and 76g of sodium peroxide (1.5 times the theoretical value required for the reaction of antimony and arsenic in the antimony-arsenic material), the Calcined at 350°C for 3 hours to obtain a calcined product;
[0040] 2) Add water to the calcined product, stir, and perform leaching at 50°C. After leaching for 2 hours, filter to obtain leaching solution and leaching slag. The leaching slag is about 80% thick sodium antimonate, which can be used to prepare high-purity sodium pyroantimonate. Wherein the mass volume ratio of calcined product and water is 1:12g / ml;
[0041] 3) Add calcium oxide to the leaching solution, stir at room temperature, filter after reacting for 2 hours to obtain the filter residue and filtrate, dry the filter residue to obtain the calcium arsenate product, and return the filtrate to step 2), wherein the molar ratio of the c...
Embodiment 3
[0043] 1) After mixing 100g of antimony-arsenic material with a particle size of 300 mesh (wherein antimony is 13.21%, arsenic 23.14%) and 98g of sodium peroxide (twice the theoretical value required for the reaction of antimony and arsenic in the antimony-arsenic material) Calcined at 300-390°C for 2-5 hours to obtain a calcined product;
[0044] 2) Add water to the calcined product, stir, and perform leaching at 55°C. After leaching for 5 hours, filter to obtain leaching solution and leaching slag. The leaching slag is about 80% thick sodium antimonate, which can be used to prepare high-purity sodium pyroantimonate. Wherein the mass volume ratio of calcined product and water is 1:20g / ml;
[0045] 3) Add calcium oxide to the leaching solution, stir at room temperature, filter after reacting for 1 hour to obtain the filter residue and filtrate, dry the filter residue to obtain the calcium arsenate product, and return the filtrate to step 2), wherein the molar ratio of the calc...
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