Production of lime by thermal decomposition This is the main reaction in commercial lime burning to make lime (calcium oxide) which is a base and has many uses, some of which are described below. Controlling pH by the use of lime Lime is used to neutralise acidic soil and it is also used to remove sulfur dioxide from coal-fired power station gases (known as flue gas desulfurisation, FGD). The product is gypsum, used in building materials such as plasterboard. A very simplified form of the reaction can be represented by the following equation.
Vertical roller mill advanced technological features of limestone mining process
Liming heavy industry designed the wet limestone powder ball mill machines which are widely applied for limestone mining industry of Indonesia.
Larger size limestone mineral is belt into primary crushing machines than put into ball mill machines to get small size.
The excessive amount of the dispersant could cause a cushion layer formed on limestone mineral milling beads and thus lowers stress intensities from the collisions of milling beads, leading to an inefficient milling operation. In addition, it was found that the higher the beads load, the better the cumulative energy efficiency, and the smaller the product size at the same specific energy consumption. For a given solids concentration, the relationships between the specific surface area and the particle size of an FP product and the additive amount of Dispersant S40 are explored, respectively. Furthermore, an empirical particle size-energy model provides a good fit (R2 > 0.991) to the grinding results under the experimental conditions investigated.The ball mill has a larger capacity of limestone powder mining process.
Working principle of vertical roller mill for limestone grinding plant:
Vertical roller mills are used primary for single stage fine grinding, regrinding, and as the second stage in two stage grinding circuits. According to the need of customers, vertical roller mill can be either wet or dry designs. These mills are sized from 2 t/h to 30 TPH for wet grinding and from 0.5 t/h to 30 TPH for dry grinding. Vertical roller mills have been designed in standard sizes of the final products between 0.074 mm and 0.4 mm in diameter. So, Vertical roller mills are suitable for both general mining applications such as 1) Metallic Powders (Steel). 2) Gypsum Wallboard Additives. 3) Bronze Powders and Minerals. 4) Carbon and Coal 5) Limestone milling 6) Clinker milling 7) Quarts & feldspar milling Paint pigments milling 9) Gold recovery 10) Coir 11) Mineral grinding ,cement, concrete making and quarry applications.
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