Method for producing hollow grinding bodies and grinding bodies so produced

A ball milling medium and hollow technology, applied in the field of ball milling media, to achieve good bearing properties, good protection effects, and good melting properties of ball milling media

Inactive Publication Date: 2007-11-07
克劳迪亚斯·彼得斯技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although edge loads are also generated during operation, cracks no longer occur in this area due to the fused core tube during composite casting
The disadvantage of this method is that the core holder can no longer be removed due to the molten core tube and loses this core tube

Method used

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  • Method for producing hollow grinding bodies and grinding bodies so produced
  • Method for producing hollow grinding bodies and grinding bodies so produced
  • Method for producing hollow grinding bodies and grinding bodies so produced

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Embodiment Construction

[0019] In order to explain the method according to the invention, the casting molds used are first described. The mold 1 has an inner cavity 2 which is spherical. The cavity is connected to the outside of the casting mold 1 via a plurality of through holes 3 . Furthermore, there is an inlet (not shown) for pouring the casting material.

[0020] A spherical casting core 4 is located inside the cavity 2 . The casting core is arranged in the cavity 2 in such a way that an intermediate cavity is produced between the surface of the casting core 4 and the surface of the spherical cavity 2 , which has the same width at every location. The intermediate cavity 5 therefore has the shape of a spherical shell.

[0021] A casting core holder 6 is provided for fixing the casting core 4 in its position inside the spherical cavity 2 . The casting core holder 6 consists of a plurality of tubes 61 , 62 , 63 which are inserted into the casting core 4 and fixed in the opening 3 of the casting...

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PUM

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Abstract

The invention relates to a method for producing hollow grinding bodies (9) for comminuting material to be ground, whereby a casting mold (1) having a cavity (2) is used. The method comprises the steps of arranging a core (4) in said cavity (2) by means of retaining elements (6) so that a shell-type intermediate space (5) is produced. According to the invention, at least in the area of the intermediate space (5) a metallic material is used as a covering (71, 72, 73) for the retaining elements (6) and fuses with the casting material. The invention also relates to a corresponding grinding body having fused-in coverings which improve the rolling behavior of the grinding body produced according to the invention as only small openings are required to remove the retaining elements. Since the fusing of the metal covering into the edge area of the openings has the effect of a composite casting, even brittle materials do not suffer from chipping.

Description

technical field [0001] The invention relates to a method for processing hollow ball milling media for crushing ground materials, comprising a casting mold having a cavity in which a casting core is arranged, thus producing a shell-shaped center for casting material Cavity, inserting the fixing part for the casting core, applying a skin to the fixing part and pouring the casting material into the central cavity. Background technique [0002] It is known to use ball milling media, which are hollow, for grinding cement clinker, cement raw material, coal and similar ground materials. Compared with solid ball milling media, the hollow structure of the ball milling media has the advantage of significantly reducing weight. One disadvantage, however, is that wear is a greater problem for hollow bodies than for solid ball milling media due to the limited thickness of the shell. In order not to cause unnecessarily high wear, the grinding media must be processed in such a way that th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D25/02B02C17/20
CPCB22D25/02B02C17/20
Inventor J·-P·蒂尔
Owner 克劳迪亚斯·彼得斯技术有限责任公司
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