A control method of a treatment plant for elements to be recycled or disposed of, which includes a crushing roll adapted to reduce the size of the elements to be recycled or disposed of and a screen provided with one or more rotary shafts adapted to generate its vibration and operatively arranged upstream of the crushing roll to enable passage to the crushing roll only of elements having a size larger than a predetermined size, includes a measuring step of the vibration intensity of the screen; a comparing step of the measured vibration intensity to a desired value; and an increasing step of the rotation speed of the rotary shafts of the screen to increase the vibration intensity in case differences between the measured and desired vibration intensities exceed a predetermined threshold value.

A control method of a treatment plant for elements to be recycled or disposed of, having a crushing roll to reduce the size of the elements to be recycled or disposed of, and a screen operatively arranged upstream of the crushing roll to enable passage therethrough only of elements having a size larger than a predetermined size, includes the steps of measuring the current absorbed by the crushing roll; comparing the measured current value to a first predetermined value; and reducing the vibrations of the screen, if the measured current exceeds the first predetermined value.

The application relates to a double acting demolition device according to one embodiment for demolishing structures. The device includes a first crushing jaw for crushing operation, a first cutting jaw for cutting operation, and a combination jaw. The first jaws are separate jaws. The combination jaw is attachable to the first cutting jaw for constructing a second crushing jaw and to the first crushing jaw for constructing a second cutting jaw. The second crushing jaw is used jointly with the first crushing jaw in crushing operation and the second cutting jaw is used jointly with the first cutting jaw in cutting operation. In crushing operation, the first crushing jaw rotates around a fulcrum other than that of the second cutting jaw in cutting operation.

A control method of a crusher for elements to be recycled or disposed of, which includes a crushing assembly, to which the elements to be recycled or disposed of are provided, and pushers acting toward the crushing assembly to push the elements to be recycled or disposed of, includes a measuring step of the current absorbed by the crusher, a comparing step of the current value measured against a first predetermined value, and a reducing step of the push intensity of one or more of the pushers toward the crushing assembly in case the measured current exceeds the first predetermined value, the pushers being controlled separately from each other in order to partialize the push force and the push areas.

The invention relates to a material-bed roller mill comprising the following: two adjacently arranged rollers which are oriented in an axially parallel manner in a base state and rotate in opposite directions and between which a roller gap is formed; a foundation; two roller mountings, in each of which a roller is rotatably mounted, each roller mounting being secured to the foundation in a pivotal manner; and a clamping device which acts on the roller gap and which is arranged outside of the roller gap and connects the two roller mountings together. Each roller mounting has two rockers which are designed as separate components and each of which is arranged at an end of a roller and can be deflected independently of the other.

Apparatus and method for recovering precious metals from contaminated cement, comprising, in order of process, a crusher, in which a cement-metal conglomerate is placed, a sieve, a dispenser, a first container, suitable for collecting the metal on the bottom through the action of a magnetic stirrer, an expander, a second container, a drainage tank, and a sieve. The present invention relates in particular to the recovery of precious metal from the batch of cement contaminated by precious metals, such as platinum, rhodium, gold, or silver. In the production of glass fibers for reinforcement, dies made of an alloy of precious metals, in particular platinum and rhodium, are used. These dies are supported by a special cement structure. During the months of production life of the die, part of the precious metal diffuses into the cement on account of the high temperatures. Given the value of the metals, it is economically advantageous to recover them from the supporting cement at each change of the die.

A high-pressure roller press has a press frame, fixed and movable compression rollers rotatable about respective roller axes in the press frame, each having axially opposite roller ends in turn having end faces, and together forming a compaction zone with a roller gap vertically level with the roller axes and having a gap width that is variable during operation of the roller press. Two end plates axially flank the compaction zone at the roller ends, are mounted on the press frame so as to be movable, and are prestressed to shift axially outward away from the respective roller end faces against a prestress force during operation of the roller press. Respective single end rollers rotatable about respective end-roller axes axially delimit the roller gap and are mounted on the end plates vertically level with the roller gap.