响应面法优化氯化铵焙烧浸出低品位菱锰矿工艺

Abstract

Abstract:

:The best technical conditions were determined to obtain the best extraction process of manganese from low-grade rhodochrosite by chlorination roasting-water leaching process.The influence of calcination temperature,calcination time,mass ratio of ammonium chloride and rhodochrosite on manganese leaching rate was investigated.Taking manganese leaching rate as response value,the reaction conditions were optimized by Box-Behnken based on the results of single factor experiments.Results showed that the optimum conditions of the extraction of manganese from rhodochrosite were as follows:the calcination temperature 460 ℃,calcination time 90 min,the mass ratio of ammonium chloride to rhodochrosite was 1.42.The leaching rate of manganese 94.59% was obtained under these conditions,which accorded with the model predicted value of 94.71%.As the deviation between the two methods is small,and the method is feasible.

Key words: response surface methodology, rhodochrosite, roasting, water immersion

CLC Number:

TQ137.12

Huang Jiming,Liu Runqing,Wu Sizhan,Song Juan. Optimization of extraction process of chlorination roasting-water leaching process for low-grade rhodochrosite by response surface methodology[J]. Inorganic Chemicals Industry, 2019, 51(3): 34-37.

Figures/Tables 8

References 11

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水平	因素
水平	A 反应温度/℃	B 反应时间/min	C m（NH₄Cl）/m（锰矿）
-1	400	50	1.2
0	450	70	1.4
1	500	90	1.6

试验号	A	B	C	锰浸出率/%
1	-1	-1	0	84.4
2	1	-1	0	85.8
3	-1	1	0	84.8
4	1	1	0	88.5
5	-1	0	-1	82.3
6	1	0	-1	83.6
7	-1	0	1	79.7
8	1	0	1	86.3
9	0	-1	-1	92.4
10	0	1	-1	92.1
11	0	-1	1	92.7
12	0	1	1	92.5
13	0	0	0	93.5
14	0	0	0	93.1
15	0	0	0	92.8

类型	平方和	自由度	均方	F	P（Pr>F）	显著性
模型	305.49	9	33.94	58.69	0.000 2	**
A	21.12	1	21.12	36.53	0.001 8	**
B	0.84	1	0.84	1.46	0.280 8	△
C	0.08	1	0.080	0.14	0.725 2	△
AB	1.32	1	1.32	2.29	0.190 9	△
AC	7.02	1	7.02	12.14	0.017 6	*
BC	0.002 5	1	0.002 5	0.004 3	0.950 1	△
A²	257.69	1	257.69	445.58	< 0.001	**
B²	4.43	1	4.43	7.67	0.039 4	*
C²	12.02	1	12.02	20.78	0.006 1	**
残差	2.89	5	0.58
失拟项	2.64	3	0.88	7.15	0.125 2	△
纯误差	0.25	2	0.12
总离差	308.38	14

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Optimization of extraction process of chlorination roasting-water leaching process for low-grade rhodochrosite by response surface methodology

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