Solid material comminution or disintegration – Apparatus – Including means applying fluid to material
Patent
1993-12-03
1995-10-31
Eley, Timothy V.
Solid material comminution or disintegration
Apparatus
Including means applying fluid to material
110219, 241 65, 241 67, 241264, F23G 5033, B02C 110, B02C 2324
Patent
active
054622379
DESCRIPTION:
BRIEF SUMMARY
This application is a continuation of PCT/EP92/012654.
The invention relates to a crushing unit for crushing high-temperature baked material, in particular cement clinker, between a furnace and a cooler.
BACKGROUND AND SUMMARY OF THE INVENTION
The smaller and more even the particle size of the baked material, the more quickly and uniformly it can be cooled. This has a favourable effect on the size of the cooler and the quality of the product. The connection of a crusher for crushing the baked material upstream of the cooler and directly following the furnace has therefore already been considered (DE-A 29 25 665). The service life of the crusher is primarily dependent on its effective temperature load. The latter is determined on the one hand by the intensity of the transfer of heat from the material to components of the crusher which are subject to wear, and on the other hand by the cooling of those components. This load is the lower, the shorter the time of contact between the crusher components and the hot material and the more freely cooling air can be passed through the crusher. From these points of view consideration has been given to percussion impact crushers (FRA-2 194 133, DE-C 33 23 565, DE-A 29 25 665), an autogenous mill (DE-A 29 25 665), air-swept mills DE-B 23 61 060 ), drop impact crushers (DE-A 35 26 345) and roll crushers (DE-B 27 47 732). When these crushers have active crushing elements, the latter are distinguished in that they rotate and that they are in contact with the baked material only during a small part of their revolution and can be intensively swept over by cooling air during the remainder of their revolution.
Jaw crushers, which are known per se (EP-A-0 148 780, WO-A-85 03 887, SU-782 860, DE-C 266 524), have not hitherto been used for hot material because they do not provide these favourable preconditions for hot operation. On the contrary, the surfaces of the crushing elements are continuously in contact with the hot baked material even when no impulse exchange takes place. As the crushing chamber is filled with material to be crushed, said surfaces are scarcely accessible to a flow of cooling air.
It is thus contrary to previous views that for the purpose of reducing manufacturing and operating costs of the crusher working under hot conditions that the invention proposes a jaw crusher.
The invention has however realized that a jaw crusher arranged in the manner indicated can have advantages over other types of crushers for the following reasons: whereas at temperatures of 1000.degree. to 1500.degree. C. in the latter the crushing elements are subjected to a combination of thermal stress, particularly also temperature change stress, and high specific impact stress while undergoing a rubbing relative movement, in the case of the jaw crusher practically no temperature change stress occurs because both the heat transfer from the material and the cooling action are practically invariable over a period of time, so that protective elements of heat-resistant metal alloys or ceramic materials can be used for the crusher jaw surfaces subjected to stress. Whereas the crushing tools of rotary crushers are practically inaccessible to cooling from the side remote from the material to be crushed, jaw crushers can be more effectively cooled because their entire rear surface, that is to say a surface which is exactly as large as the surface participating in the crushing operation, is available for the introduction of cooling power. The increased thermal stressing of the crushing jaw surfaces through intensive contact with the material to be crushed can thus be effectively countered by the installation of cooling devices in the crushing jaws. The specific impact stress, which in the case of types of crushers rotating at high speed is determined by the relative speed of the crushing elements and the mass of the pieces of material to be crushed, is low in the given case of use for jaw crushers because at the high temperature the material has no substantial hardness.
It has in addition bee
REFERENCES:
patent: 983055 (1911-01-01), Hosmann
patent: 1024664 (1912-04-01), Baltz
patent: 1220257 (1917-03-01), Molander
patent: 2002224 (1935-05-01), Eastwood
patent: 2554697 (1951-05-01), Conway
Soviet Inventions Illustrated, Section P, Week D34, 30 Sep. 1981 Derwent Publications Ltd., London, GB.
Claudius Peters Aktiengesellschaft
Eley Timothy V.
LandOfFree
Crushing unit in a clinker cooler does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Crushing unit in a clinker cooler, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crushing unit in a clinker cooler will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1767609