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Method for purifying byproduct phosphogypsum of wet-process phosphoric acid
The invention relates to a method for purifying byproduct phosphogypsum of wet-process phosphoric acid, which comprises the following steps of S1, flotation tank decolorization: adding water into byproduct phosphogypsum in the phosphoric acid process to regulate ore pulp, proportionally adding a decolorization reagent, and overflowing to enter a flotation tank, S2, jigging reselection column desilicication: supplementing water to the decolorized ardealite concentrate pulp obtained in the step S1, pumping the decolorized ardealite concentrate pulp into a desilicication reselection column for jigging classification, and filtering the silicon tailing pulp in a belt filter to obtain silicon tailings, and feeding top overflow concentrate pulp for thickening and filtering, S3, filtering, washing and dephosphorizing: pumping the desiliconized ardealite concentrate pulp obtained in the S2 into an inclined plate thickener for thickening and dewatering, obtaining ardealite concentrate pulp through underflow, then pumping the ardealite concentrate pulp into a belt filter for filtering, and discharging a washed filter cake into a warehouse, so as to obtain a refined ardealite product. The method is suitable for a large-scale industrial device, can realize continuous, stable and reliable production, has strong adaptability to the byproduct phosphogypsum, and is especially suitable for the byproduct phosphogypsum of a phosphoric acid device using low-quality phosphate ore at present.
一种湿法磷酸的副产磷石膏的提纯方法，它包括以下步骤：S1、浮选槽脱色：磷酸工序的副产磷石膏加水调节矿浆，按比例加入脱色药剂，溢流进入浮选槽；S2、跳汰重选柱脱硅:将S1中浮选槽得到的脱色磷石膏精矿浆补水，泵入脱硅重选柱跳汰分级，硅尾渣矿浆进入带式过滤机过滤，得到硅尾渣；顶部溢流精矿浆送去浓密过滤；S3、过滤水洗脱磷：将S2得到的脱硅后的磷石膏精矿浆泵入斜板浓密机浓密脱水，底流得到磷石膏精矿浆，再泵入带式过滤机进行过滤，洗涤后的滤饼排到仓库，得到精制磷石膏产品。本发明适用于大型工业化装置，能连续稳定可靠生产，对副产磷石膏适应性强，特别适应目前用低品质磷矿石的磷酸装置的副产磷石膏。
Method for purifying byproduct phosphogypsum of wet-process phosphoric acid
The invention relates to a method for purifying byproduct phosphogypsum of wet-process phosphoric acid, which comprises the following steps of S1, flotation tank decolorization: adding water into byproduct phosphogypsum in the phosphoric acid process to regulate ore pulp, proportionally adding a decolorization reagent, and overflowing to enter a flotation tank, S2, jigging reselection column desilicication: supplementing water to the decolorized ardealite concentrate pulp obtained in the step S1, pumping the decolorized ardealite concentrate pulp into a desilicication reselection column for jigging classification, and filtering the silicon tailing pulp in a belt filter to obtain silicon tailings, and feeding top overflow concentrate pulp for thickening and filtering, S3, filtering, washing and dephosphorizing: pumping the desiliconized ardealite concentrate pulp obtained in the S2 into an inclined plate thickener for thickening and dewatering, obtaining ardealite concentrate pulp through underflow, then pumping the ardealite concentrate pulp into a belt filter for filtering, and discharging a washed filter cake into a warehouse, so as to obtain a refined ardealite product. The method is suitable for a large-scale industrial device, can realize continuous, stable and reliable production, has strong adaptability to the byproduct phosphogypsum, and is especially suitable for the byproduct phosphogypsum of a phosphoric acid device using low-quality phosphate ore at present.
一种湿法磷酸的副产磷石膏的提纯方法，它包括以下步骤：S1、浮选槽脱色：磷酸工序的副产磷石膏加水调节矿浆，按比例加入脱色药剂，溢流进入浮选槽；S2、跳汰重选柱脱硅:将S1中浮选槽得到的脱色磷石膏精矿浆补水，泵入脱硅重选柱跳汰分级，硅尾渣矿浆进入带式过滤机过滤，得到硅尾渣；顶部溢流精矿浆送去浓密过滤；S3、过滤水洗脱磷：将S2得到的脱硅后的磷石膏精矿浆泵入斜板浓密机浓密脱水，底流得到磷石膏精矿浆，再泵入带式过滤机进行过滤，洗涤后的滤饼排到仓库，得到精制磷石膏产品。本发明适用于大型工业化装置，能连续稳定可靠生产，对副产磷石膏适应性强，特别适应目前用低品质磷矿石的磷酸装置的副产磷石膏。
Method for purifying byproduct phosphogypsum of wet-process phosphoric acid
一种湿法磷酸的副产磷石膏的提纯方法
WANG LIANGJIE (author) / LI GUOHAI (author) / HE JUN (author) / YU JINTAO (author)
2021-04-30
Patent
Electronic Resource
Chinese
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