Crusher, process for preparing and testing materials and apparatus therefor

A crusher comprising

• a first rotatable pressing element in a form of a cylinder having a first cylindrical pressing face comprising screw sections disposed at both end regions of the cylinder and a crushing section disposed in the central region of the cylinder, wherein each of the screw sections is furnished with first parallel helical ridges interspaced by corresponding first parallel helical grooves or with second parallel helical ridges interspaced by corresponding second parallel helical grooves, respectively, the first ridges and grooves extending on the cylindrical pressing face in reverse turning sense to the second parallel helical ridges and grooves on the cylindrical pressing face in the other screw section, and wherein the crushing section is provided with protrusions of a form of isolate islands surrounded by depressed marginal spaces, which islands are formed in such a manner that the parallel helical ridges in extension of those on either one of the screw sections are cut by the parallel helical grooves in extension of those on the other one of the screw sections, and
• a second cylindrical pressing element to be held in engagement with the first pressing element rotatably in counter sense to the rotation of the first pressing element, which second pressing element has a second pressing face comprising screw sections disposed at both end regions of the cylinder and a crushing section disposed in the central region of the cylinder, wherein each of the screw sections is furnished with first parallel helical ridges interspaced by corresponding first parallel helical grooves or with second parallel helical ridges interspaced by corresponding second parallel helical grooves, respectively, the first ridges and grooves extending on the cylindrical pressing face in reverse turning sense to the second parallel helical ridges and grooves on the cylindrical pressing face in the other screw section, and wherein the crushing section is provided with protrusions of a form of isolate islands surrounded by depressed marginal spaces, which islands are formed in such a manner that the parallel helical ridges in extension of those on either one of the screw sections are cut by the parallel helical grooves in extension of those on the other one of the screw sections,
• wherein the ridges and protrusions of the first and the second pressing elements are disposed in such a relationship that the ridges and the protrusions on the first or the second pressing element will engage with corresponding grooves and depressed marginal spaces on the second or the first pressing element, respectively, so as to permit crushing of material supplied to the interspaces therebetween.

An apparatus for effecting material preparation, comprising

• a crusher comprising
• a first pressing element having a first pressing face provided thereon with protrusions each in a form of an isolate island surrounded by depressed marginal spaces, the protrusions being disposed not only in first parallel rows but also in second parallel rows which extend in a direction crossing the first parallel rows, and
• a second pressing element to be held in engagement with the first pressing element when being pressed thereonto, the second pressing element having a second pressing face provided thereon with protrusions each in a form of an isolate island surrounded by depressed marginal spaces, the protrusions being disposed not only in first parallel rows but also in second parallel rows which extend in a direction crossing the first parallel rows,
• wherein the protrusions of the first and the second pressing elements are disposed in such a relationship that the protrusions of the first or the second pressing element will engage with corresponding depressed marginal spaces on the second or the first pressing face of the second or the first pressing element, respectively, so as to permit crushing of material supplied to interspaces therebetween,
• a material port for supplying material to be processed to the crusher and
• a classifier for classifying crushed product from the crusher.

A process for effecting material preparation comprising the steps of

• supplying material to be processed to a crusher comprising
• a first pressing element having a first pressing face provided thereon with protrusions each in a form of an isolate island surrounded by depressed marginal spaces, the protrusions being disposed not only in first parallel rows but also in second parallel rows which extend in a direction crossing the first parallel rows, and
• a second pressing element to be held in engagement with the first pressing element when being pressed thereonto, the second pressing element having a second pressing face provided thereon with protrusions each in a form of an isolate island surrounded by depressed marginal spaces, the protrusions being disposed not only in first parallel rows but also in second parallel rows which extend in a direction crossing the first parallel rows,
• wherein the protrusions of the first and the second pressing elements are disposed in such a relationship that the protrusions of the first or the second pressing element will engage with corresponding depressed marginal spaces on the second or the first pressing face of the second or the first pressing element, respectively, so as to permit crushing of material supplied to interspaces therebetween and
• effecting crushing, mixing or homogenization of the so-supplied material by the crusher.

A process for effecting material preparation comprising the steps of

• supplying material to be processed to a crusher comprising
• a first pressing element having a first pressing face provided thereon with protrusions each in a form of an isolate island surrounded by depressed marginal spaces, the protrusions being disposed not only in first parallel rows but also in second parallel rows which extend in a direction crossing the first parallel rows, and
• a second pressing element to be held in engagement with the first pressing element when being pressed thereonto, the second pressing element having a second pressing face provided thereon with protrusions each in a form of an isolate island surrounded by depressed marginal spaces, the protrusions being disposed not only in first parallel rows but also in second parallel rows which extend in a direction crossing the first parallel rows,
• wherein the protrusions of the first and the second pressing elements are disposed in such a relationship that the protrusions of the first or the second pressing element will engage with corresponding depressed marginal spaces on the second or the first pressing face of the second or the first pressing element, respectively, so as to permit crushing of material supplied to interspaces therebetween,
• effecting crushing, mixing or homogenization of the so-supplied material by the crusher and
• classifying the so-processed material.