Manganese sulfate production process

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The process research on the two mines. Liu Yulin
x
(Functional and Materials Institute of Hunan Chemical Research Institute, 410007, Changsha, Hunan)
Abstract: The principle and process conditions of the low -quality soft manganese ore in the two mines are introduced. Below, use sulfur
ore -as reducing agent, and use sulfuric acid to directly immerse the MN with a low -grade soft manganese ore with a MN content of about 25 %, with an immersion rate of 93 %. The work
The characteristics of strong practicality and high manganese recovery rate have opened a new
path for the use of low -quality soft manganese ore.
The keywords: two mineral methods; soft manganese ore; manganese sulfate; process research
If classification numbers: TF111. 31 Literature logo code: A article number: 1002-4336 (2004) 02-0035-03
In the past 10 years, with the rapid development of manganese metallurgical and manganese chemicals in my country, the demand for manganese ore has become increasingly demanding. In recent years, the price has also risen,
The production cost control of manganese metallurgical and manganese chemical industries has proposed
severe challenges. my country's manganese ore reserves are very limited, while most
are low -quality. Low -grade rhodium manganese ore has been widely used in electrolytic manganese and
in electrolytic manganese dioxide. The low -quality soft manganese
ore has been unable to use it directly. This not only improves costs and wastes resources. In order to overcome
The traditional method of production of manganese sulfate, low energy consumption, high cost, high cost, and large labor intensity, and the disadvantages of serious environmental pollution Manganese ore, the author carried out the two -mine method of immersion
The low -grade soft manganese ore manganese sulfate and its downstream products of the process
. Experiments show that the raw materials are widely sources, and the process and equipment are simple
orders, the operation is stable, the energy consumption is low, the production cost is low, and it has a wide range of practicality, significant economic and social benefits.
1 Basic principle
The research on the two mines soaked with manganese ore manganese sulfate,
but low -quality soft manganese ore with manganese content below 30 %directly uses manganese sulfate No report has been seen yet. The manganese in the soft manganese ore exists in the form of diexo
. It cannot be directly immersed by sulfuric acid. It must be
It must be repaid in order to restore MN4 into MN2
and then Mnso4 with H2SO4. There are many kinds of roser, such as sulfur
The iron ore, iron sulfate, sulfur dioxide and other reducing agents. The author
The material source is wide, the price is cheap, the operation is convenient, and the reduction effect
The fruit is good and easy to use in large -scale industrial production
reduction agents, that is, two mineral methods. That is, mixing soft manganese ore, sulfur ore, sulfur
in a certain proportion, reacts with a certain condition to generate sulfur
, and then remove other impurities immersed by sulfuric acid at the same time
, Get manganese sulfate. It is generally believed that the main reaction party of the two mines
programs are:
15mno2 2Fes2 14H2SO4
15mnso4 Fe2 (SO4) 3 14H2O
See Figure 1 in the process.
2 experiment
2. 1 raw material and specifications
soft manganese ore: This study adopts a certain mine in Hengyang District, Hunan Province
-unprecedented low -quality soft manganese ore, the particle size is 01150 mm, the granularity is 01150 mm.
The main components are as follows:
Mno2 39181 %, MN 25117 %, Fe 7125 %,
MGO 0174 %, CAO 1718 %.
Sulfed iron ore: a sulfur iron ore in a certain mine in Hunan Province, the particle size is
01150 mm, the main components are as follows:
3517 %, Fe 35186 %, of which FES: 1414 %,
FES2: 5711 %
Sulfuric acid: 93 %smelting and recycling acid in a factory in Hunan Province
2. 2 Experimental research
experimenting with 2,000 mL burn as a reactor, stirring with stirring
device. First, a certain amount of water is injected into the reactor and stirred.
Coffs the soft manganese ore and sulfuric acid according to a certain proportion, and then heated, and then slowly add the sulfur mineral powder. Heating and heating up to about 95 ° C, guarantee
temperature 3 to 6 h, add iron removal agent after the reaction, wait for pH> 5
, filter, wash, wash the water for the next immersion of the reaction, wash, wash the water for the next immersion Apply,
The obtained manganese sulfate solution is added to the removing agent, and the stirring conditions
will be filtered for a certain period of time, and then the filtrate is filtered by
to remove manganese sulfate to remove manganese sulfate The impurities in the solution, the clean manganese sulfate
The solution can be used as the raw material of the downstream of the downstream of the metal manganese or manganese dioxide, manganese carbonate, etc., or the crystals can also be condensed and then dried to get manganese sulfate
products.
3 Experimental results and discussions
3. 1 Condition experiment
Conditional experiments are performed by orthogonal tests, fixed
Mining,
The dosium sulfuric acid dosage and reaction time as three factors to design orthogonal
The tests, each factor takes 3 different levels, orthogonal test each
1 .
Table 1 orthogonal test factor level design table
level
due to
sub - n a (fes2, g) b (h2so4, g) C (time pH)
1 a 1 b1 c1
2 a 2 B2 C2
3 A 3 B3 C3

Table 2 orthogonal test scheme
serial number
a b c
1 2 3

1 a 1 b 1 C1 75. 5
2 a 1 b 2 C2 85. 2
3 a 1 b 3 c3 68. 6
4 a 2 b 1 c1 92. 7 n 5 a 2 b 2 C2 C2 93. 5
6 A 2 B 3 C3 83. 2
7 a 3 B 1 C1 83. 7
8 a 3 b 2 C2 84. 3
9 A 3 B 3 C3 79. 4
K1 229. 3 251.9 243. 0
K2 269. 4 263. 0 257. 3
K3 247. 4 231. 2 245. 8
k1 76. 4 84. 0 81. 0
K2 89. 87. 7 85.8
K3 82. 5 77. 1 81.9
R 13. 4 10. 6 4. 8rn 因子主次A > B > Crn 较优水平A 2 B 2 C2rn 从表2 看出, A 因子中, k2 = 8918 为最大,r n indicates that the level of A 2 is the best in the A factor. Therefore, A 2,
B2, C2 are better levels. From the R value in the Table, the factors that the impact on the immersion
are the largest and secondary factor A factor, the B factor secondary
, and the C factor is small.
3. 2 The best process conditions verification
Axing the results of the orthogonal test, select A 2, B2,
c2 as the process conditions, fix the amount of soft manganese ore, the reaction temperature is taken r
95 ° C, the liquid solid ratio is 5: 1, and the cycle test is performed. The three sets of continuous data in the
of the test are shown in Table 3.
Table 3 optimal process condition circulation test results
serial number
items

soft manganese ore PG sulfur ore pg sulfuric acid PG liquid solid ratio temperature PH reaction time pH Immersion rate p%
1 200 s 110 5: 1 95 4 93. 48
200 s 110 5: 1 93. 60
3 200 s 110 5: 1 95 42 . 12