Manufacturing Method of Manganese Carbonate
I. Introduction
As an important inorganic chemical, manganese carbonate is widely used in metallurgy, ceramics, glass, fertilizer and other fields. Especially in metallurgical industry, manganese carbonate is commonly used as raw material for smelting ferromanganese alloy and manufacturing manganese metal. In this paper, the manufacturing method of manganese carbonate will be discussed in detail.
II. Raw materials and equipment
1. Raw materials: The main raw materials for the preparation of manganese carbonate are manganese ore, sulfuric acid and carbonate. Among them, the higher the content of manganese in manganese ore, the higher the purity of prepared manganese carbonate.
2. Equipment: The equipment needed includes crusher, ball mill, stirring reactor, centrifuge, dryer and so on.
3. Manufacturing method
1. Crushing and grinding of manganese ore: the manganese ore is crushed and ground to a certain fineness in order to increase the surface area of manganese ore and improve the reaction rate.
2. Acid leaching: The manganese ore after grinding is mixed with sulfuric acid in a certain proportion, and the reaction is carried out in a stirring reactor, so that the manganese in the manganese ore is converted into manganese sulfate. The concentration of sulfuric acid and the reaction temperature need to be controlled during the reaction to ensure the smooth progress of the reaction.
3. Neutralization: Manganese sulfate solution is mixed with carbonate solution, and a neutralization reaction occurs to produce manganese carbonate precipitate. The pH needs to be controlled in this process to ensure the purity of manganese carbonate.
4. Centrifugal separation: Separate the manganese carbonate precipitate from the mother liquor by centrifugal machine and collect the manganese carbonate precipitate.
5. Washing and drying: Wash the manganese carbonate precipitate with deionized water to remove the impurity ions attached on the surface, and then dry the washed manganese carbonate precipitate to get manganese carbonate product.
4. Precautions
1. In the process of acid leaching, it is necessary to pay attention to the concentration of sulfuric acid and temperature control, in order to avoid the corrosion and loss of the equipment by too high acidity and temperature.
2. In the process of neutralization, it is necessary to strictly control the pH value to ensure the purity of the generated manganese carbonate. At the same time, attention needs to be paid to the selection of carbonate to avoid the introduction of new impurities.
3. In the centrifugal separation process, the rotational speed and time of the centrifuge need to be ensured to ensure the effective separation of the manganese carbonate precipitate from the mother liquor.
4. In the process of washing and drying, it is necessary to pay attention to the selection of water consumption and water quality to avoid incomplete washing or incomplete drying which may affect the product quality.
V. Conclusion
The manufacturing method of manganese carbonate mainly includes the steps of manganese ore crushing and grinding, acid leaching, neutralization, centrifugal separation, washing and drying. In the manufacturing process, attention needs to be paid to the selection of raw materials, maintenance of equipment and control of operation to ensure product quality and production efficiency. Through the continuous optimization and improvement of the manufacturing method, the purity and yield of manganese carbonate can be further improved to provide better raw material guarantee for related industries.
