CS241294B1 - Armored sorters or pulverized mines of ground rocks, especially coal mills - Google Patents

Abstract

The purpose of the solution is to enable the use of basalt or ceramic materials for armoring. This is achieved by the armor prisms made of basalt or ceramic materials being freely inserted into the grooves of the interior of the housing.

Description

The subject of the invention is the armor of sorters or gas pipes, especially of coal mills.

When transporting ground rock materials such as coal, heavy abrasive wear occurs at exposed areas of the transport routes. ^r roto these sites are protected by different armors whose shape and material choice depends on the operating conditions of each machine.

In power plants firing ground solid fuels, armor of exposed places of manure screeners and pulverizers is made of steel or cast steel plates or transversely placed metal prisms. Extreme operating conditions with fluctuating temperatures do not allow only the replacement of metallic abrasive armor with more resistant ceramic materials due to their susceptibility to cracking. During the operation of the grinding device, the armor wear is uneven on the wear surface. Mostly, intensive wear of the relatively narrow part occurs where the abrasive material is most concentrated. When using armor plates, only worn plates can be replaced. When using steel prisms it is necessary to change the whole prisms even in case of a narrow notched notch on the prisms.

The disadvantage of plate armoring lies mainly in the vertical joints between the plates, where, due to the flowing abrasive medium, the sheath of the sorter is most often cut through. Another disadvantage is the large number of screws that need to be screwed through the sorter housing to attach the armor plates. This method of attachment thus increases the possibility of dusting during operation.

Cross prism armor reduces the number of through bolts and removes vertical joints. The main disadvantage, however, lies in the relatively low use of armor material, which is devalued by longitudinal pruned notches.

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The aforementioned disadvantages of armor eliminate armor of screens or powder ducts of the invention. The essence of the invention is that the basalt or ceramic uranium fibers are loosely inserted into the interior space of the housing. Horizontal metal reinforcement and vertical metal reinforcement are inserted into the preformed grooves of the armored prisms.

The invention makes it possible to use short basaltic prisms for lining walls that are no longer as susceptible to transverse cracking in temperature. The reinforcement ensures the stability of the basalt armor placement and their secure fixing against falling out, even in case of accidental lateral or longitudinal armor rupture. In addition, the vertical part of the reinforcement prevents the abrasive medium from penetrating to the screen of the separator and thus damages it. The cast grooves in the basalt prisms, on the other hand, cover the metal reinforcement against the abrasive material and thus protect it from damage and deterioration. By using metal reinforcement it is possible to use basalt armor even in thermally unfavorable conditions, whereby the service life of armor is increased several times compared to metal armor.

The accompanying drawings show, in an exemplary embodiment, the armor wall of the reversing screen. Fig. 1 is a view of the armored wall; Fig. 2 is a vertical cross-section of the armored wall;

Fig. 4 is a horizontal sectional view of the armored wall. Fig. 4 is a vertical sectional view of the armored wall.

The armor, located in the interior of the cabinet 1, consists of basalt heavens of ceramic armor prisms 2, 4, which have horizontal metal reinforcements 4 and vertical metal reinforcements 2 in the pre-formed grooves. the lower row of armored prisms is half-polished with a monolithic metal prism 6; The transverse profile of the horizontal end stiffeners 2, which are in the immediate vicinity of the metal prisms 6, has a different cross-sectional profile than the horizontal stiffeners 6. The continuing protected area and the lower degree of ebrasion is lined with metal prisms 8.

Claims (2)

pThe sevenththesis Armor of screeners or pulverizers of ground rocks, in particular coal mills with armored prisms, characterized in that armored prisms (2, 3) of basalt or ceramic materials are freely inserted in the grooves of the interior space of the casing. Armor according to claim 1, characterized in that a horizontal metal reinforcement (4,7) and a vertical metal reinforcement (5) are inserted into the preformed grooves of the armored prisms (2,3).