老卤-碳铵法生产高纯氧化镁工业试验探索研究

doi:10.19964/j.issn.1006-4990.2021-0110

Abstract

Abstract:

Relying on the existing soda ash and potassium sulfate production units,Shandong Haihua Group Co.had developed the process technology of producing high-purity magnesium oxide by continuous reaction pyrolysis with ammonium bicarbon-ate,adopting the residual bittern and soda ash calcination condensate as raw materials,and built a 500 t/a high-purity magne-sium oxide pilot test device.The pilot test device had run continuously and stably for 1 500 h,and 110 t of qualified high-purity magnesium oxide products were obtained.The average fresh water consumption per ton of products was 83 m³.The pilot test preliminarily verified the reliability of the new process of producing high purity magnesium oxide by continuous reaction pyrolysis of residual bittern and ammonium bicarbonate.The preliminary analysis of a 10 000 t/a high-purity magnesium oxide plant showed that the process had good economic and environmental benefits.

Key words: basic magnesium carbonate, residual bittern, high-purity magnesium oxide, ammonium bicarbonate process

CLC Number:

TQ132.2

Zhao Fujun,Zhang Haobo,Wu Zhongping,Huang Huilin. Pilot test on the production of high purity magnesium oxide from residual bittern and ammonium bicarbonate[J]. Inorganic Chemicals Industry, 2021, 53(8): 71-74.

Figures/Tables 9

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References 19

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序号	滤饼含水率/ %	w（氧化镁）/ %	新鲜水耗量/ （t·t^-1）
1	72.68	43.40	85.97
2	71.89	42.42	83.05
3	71.54	43.15	79.02
平均值	72.04	42.99	82.68

项目名称	w（氧化镁）/ %	w（氯化物）/ %	w （锰）/ %	w （铁）/ %	表观密度/ （g·mL^-1）	白度/ 度	w （钠）/ %	w （钾） / %
样品1	99.82	0.03	0.001	0.003	0.16	99	—	—
样品2	99.37	0.02	0.001	0.004	0.16	99	—	—
样品3	99.18	0.05	0.001	0.003	0.15	96	—	—

序号	名称	高纯氧化镁			备注
序号	名称	单耗	单价/（元·t^-1）	合计/（元·t^-1）	备注
一	生产成本			3 874
1.1	苦卤	5.5 m³/t	105	578
1.2	气氨回收	0.85 t/t	400	340
1.3	液氨	0.005 t/t	2 400	12
1.4	蒸馏水	83 m³/t	10	830
1.5	电	932 kW·h/t	0.46	429
1.6	天然气	259 m³/t	3.85	997
1.7	蒸汽	5.5 t/t	125	688
二	其他费用			1 064	8万/人 10 a投资3%
2.1	工资			240
2.2	折旧			480
2.3	维修费			144
2.4	其他			200
三	合计			4 938

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Pilot test on the production of high purity magnesium oxide from residual bittern and ammonium bicarbonate

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