氯化焙烧-水浸法回收钡渣中钡的研究

doi:10.11962/1006-4990.2020-0184

Abstract

Abstract:

Barium slag was treated by chlorination roasting-hot water leaching process using CaCl₂ as chlorinating agent and the barium was recovered in the form of BaCl₂ from barium slag.Through a series of experiments such as roasting temperature,roasting time and chlorinating agent amount etc.,the optimal technological conditions were determined as follows：the roasting temperature is 1 000 ℃,the roasting time is 45 min and the amounts of CaCl₂ is 1.3 times of the theoretical value.Under the optimal conditions,the acid dissolved barium in barium slag was recovered completely with the recovery rate of barium at 86.8%. The main components of the leaching solution were BaCl₂ and CaCl₂.The product of BaCl₂ is obtained by evaporating,concentrating and crystallizing,which quality meets the requirements of GB/T 1617—2014,Barium Chloride for Industrial Use.

Key words: barium chloride, barium slag, chlorination roasting-water leaching, leaching rate, recovery rate

CLC Number:

TQ132.35

Shang Fangyu,Su Xuetong,Shang Suying. Study on recovery of barium from barium slag by chlorination roasting-water leaching process[J]. Inorganic Chemicals Industry, 2021, 53(3): 65-67.

Figures/Tables 6

References 18

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温度/℃	K_a/10²	温度/℃	K_a/10²
400	140.0	700	6.94
500	40.2	800	3.63
600	15.2	900	2.10

项目	w （BaCl₂·2H₂O）	w （Sr）	w （Ca）	w （S）	w （Fe）	w（水不溶物）
国标	≥98.0	≤0.30	≤0.090	≤0.008	≤0.003	≤0.10
样品	98.7	0.18	0.073	0.005	0.002	0.05

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on recovery of barium from barium slag by chlorination roasting-water leaching process

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