Refining method of titanium dioxide by-product ferrous sulphate
A ferrous sulfate and refining method technology, applied in the direction of ferric sulfate, can solve the problems that the pH value cannot be removed, affect the purity of ferrous sulfate, etc., and achieve the effect of high tinting strength and good hue
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Embodiment 1
[0025] Under normal temperature, utilize titanium dioxide by-product ferrous sulfate preparation concentration to be 500ml of ferrous sulfate heptahydrate solution of 350g / L, adjust the pH value of this solution with sulfuric acid to be 1, carry out titanium hydrolysis treatment to titanium dioxide by-product ferrous sulfate; Add 26g iron powder to reduce Fe in the ferrous sulfate heptahydrate solution after titanium hydrolysis treatment 3+ And adjust the pH value to 6.0, reduce the magnesium, manganese, zinc ions to obtain the precipitation of magnesium, manganese, zinc element, add 0.09g polyacrylamide flocculation to the solution after titanium hydrolysis treatment and magnesium, manganese, zinc precipitation treatment agent, stirred, left to settle for 5 hours, and then filtered to remove the product of titanium hydrolysis and the precipitation of magnesium, manganese, and zinc, and the filtrate was the refined ferrous sulfate solution.
[0026] After testing, the content ...
Embodiment 2
[0028] At 50°C, 500ml of ferrous sulfate heptahydrate solution with a concentration of 370g / L was prepared by using ferrous sulfate, a by-product of titanium dioxide, and the pH value of the solution was adjusted to 1.5 with sulfuric acid, and titanium dioxide was hydrolyzed by ferrous sulfate, a by-product of titanium dioxide. treatment; then add 28g iron powder to reduce Fe in the ferrous sulfate heptahydrate solution after titanium hydrolysis treatment 3+ And adjust the pH to 6.1, reduce the magnesium, manganese and zinc ions to obtain the precipitation of magnesium, manganese and zinc, and when the solution is cooled to room temperature, add 0.09g of polyacrylamide flocculant, stirred, settled for 2 hours, and then filtered to remove the products of titanium hydrolysis and the precipitates of magnesium, manganese, and zinc, and the filtrate was the refined ferrous sulfate solution.
[0029] After testing, the content of ferrous sulfate in the refined product is 344g / L.
Embodiment 3
[0031] At 60°C, 500ml of ferrous sulfate heptahydrate solution with a concentration of 400g / L was prepared by using ferrous sulfate, a by-product of titanium dioxide, and the pH value of the solution was adjusted to 2.0 with sulfuric acid, and titanium dioxide was hydrolyzed by ferrous sulfate, a by-product of titanium dioxide. treatment; then add 30g iron powder to reduce Fe in the ferrous sulfate heptahydrate solution after titanium hydrolysis treatment 3+ And adjust the pH to 6.0, reduce the magnesium, manganese and zinc ions to obtain the precipitation of magnesium, manganese and zinc, and when the solution is cooled to room temperature, add 0.1g polyacrylamide flocculant, stirring, settling for 1.5h, and then filtering to remove titanium hydrolysis products and magnesium, manganese, zinc precipitates, and the filtrate is the refined ferrous sulfate solution.
[0032]After testing, the content of ferrous sulfate in the refined product is 372g / L.
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