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Preparation process introduction
In limestone by automobile or forklift truck unloaded into the hopper, using a one-stage crushing limestone, limestone plate feeding machine will lime stones into the crusher, feed particle size control in general 400-500mm, the grain size control in about 15mm, limestone conveyor equipment broken after feeding into lime stone base, base is arranged on the top of single charge dust precipitator.
The crushed limestone from the reservoir bottom timing belt scale batching, by belt conveyor feeding vertical mill for grinding fineness of 250 mesh, the finished product is a limestone powder. Limestone powder grinding after the conveyor into a finished product warehouse storage. The reservoir base top is provided with single dust precipitator.
The finished product is located in bulk machine at the bottom of the reservoir, into the bulk tank car transport factory.
By vertical roller mill of limestone powder for the main characteristics of the processing technology
Vertical roller mill grinding process using material layer touch the principle of grinding, grinding pressure adjustable, low noise, low energy consumption, small abrasion, high adaptability to raw materials, simple process, high system efficiency. The whole system is a negative pressure operation, little dust pollution. Vertical mill grinding process, the product particle gradation are homogeneous, product fineness adjustable (product fineness of 600 mesh or above), at the same time, the product fineness can be rapid determination and correction.
Process of self production of domestic equipment, unobstructed by the production line process, investment started fast, easy production and management. In the choice of production process scheme and equipment selection, the use of mature, reliable new process and new technology, the technology should be advanced, economic and reasonable, practical and reliable. Electrical automation control level to achieve reliable, practical. Attaches great importance to the comprehensive management of the environment, can reach the national standard. The main technical and economic indexes: the fineness of limestone powder: 325 mesh, sieve residue <5%; comprehensive energy consumption of 45KW/ tons.
In conclusion, adopting the technology of limestone powder preparation of vertical roller mill process, fineness and particle size distribution of its products are homogeneous, the product fineness can be rapid determination and correction, can be very good with flue gas desulfurization need appropriate limestone powder, improving the desulfurization efficiency. The technological process is simple, energy consumption than traditional pipe mill process to reduce 20~30%, product quality is greatly improved.