Mineral processing plant
A mineral processing plant for crushing mineral material or the like, using a crushing device and an internal combustion engine. In a first mode of operation an internal combustion engine is mechanically coupled to the crushing device to drive the latter. A generator is provided, which is mechanically coupled to an internal combustion engine to drive this generator, and the generator is coupled to one or more auxiliary units to supply to supply electric power thereto. An electric motor is provided separately from the generator, which electric motor is mechanically coupled to the crushing device in a second operating mode to drive the crushing device.
1 . A mineral processing plant for crushing mineral material, comprising:
a crusher;
an internal combustion engine;
an electric generator mechanically coupled to the internal combustion engine such that the electric generator may be driven by the internal combustion engine;
one or more auxiliary units electrically connected to the electric generator such that the electric generator may provide electric power to the one or more auxiliary units; and
an electric motor separate from the electric generator;
wherein in a first mode of operation the internal combustion engine is mechanically coupled to the crusher to drive the crusher; and
wherein in a second mode of operation the electric motor is mechanically coupled to the crusher to drive the crusher.
2 . The mineral processing plant of claim 1 , wherein:
in the first mode of operation the electric motor is mechanically disconnected from the internal combustion engine and the electric generator by a clutch.
3 . The mineral processing plant of claim 1 , further comprising:
a clutch configured to selectively couple the electric motor to the crusher;
wherein in the first mode of operation the electric motor is disconnected from the crusher by the clutch; and
wherein in the second mode of operation the electric motor is connected to the crusher by the clutch.
4 . The mineral processing plant of claim 1 , wherein:
in a third mode of operation both the internal combustion engine and the electric motor are mechanically coupled to the crusher to drive the crusher.
5 . The mineral processing plant of claim 4 , further comprising:
an accumulator for storing electrical energy;
wherein in the first mode of operation the accumulator is electrically connected to the electric generator such that the accumulator is charged by the electric generator; and
wherein in the third mode of operation the electric motor is supplied with electric energy from the accumulator and/or from an external power supply.
6 . The mineral processing plant of claim 1 , further comprising:
a first clutch configured to selectively couple the internal combustion engine to the crusher;
wherein in the first mode of operation the first clutch couples the internal combustion engine to the crusher; and
wherein in the second mode of operation the first clutch disconnects the internal combustion engine from the crusher.
7 . The mineral processing plant of claim 1 , further comprising:
a first transmission connecting the internal combustion engine to the crusher in the first mode of operation.
8 . The mineral processing plant of claim 7 , further comprising:
a second transmission connecting the internal combustion engine to the generator.
9 . The mineral processing plant of claim 7 , wherein:
the first transmission is integrated in a drivetrain between the internal combustion engine and the crusher and between the electric motor and the crusher.
10 . The mineral processing plant of claim 9 , further comprising:
the first clutch is integrated in the drivetrain between the internal combustion engine and the first transmission; and
a second clutch is integrated in the drivetrain between the electric motor and the first transmission.
11 . The mineral processing plant of claim 1 , further comprising:
a machine chassis;
one or more electric or electrohydraulic travel drives configured to move the machine chassis; and
an accumulator for storing electrical energy;
wherein at least one of the one or more travel drives is supplied with electric power from the generator and/or from an external power supply and/or from the accumulator.
12 . The mineral processing plant of claim 11 , further comprising:
a power supply controller configured to receive electrical power from the generator and/or from the external power supply and/or from the accumulator, the power supply controller being further configured to supply electrical power to the one or more auxiliary units and/or to the electric motor and/or to the at least one of the one or more travel drives.
13 . The mineral processing plant of claim 1 , further comprising:
a first transmission connecting the internal combustion engine to the crusher in the first mode of operation;
a second transmission connecting the internal combustion engine to the generator;
a hydraulic pump connected to and driven by the first or second transmission; and
a hydraulic motor connected to the hydraulic pump by a hydraulic line, the hydraulic motor being connected to a fan to drive the fan for cooling of the internal combustion engine and/or the electric motor.
14 . The mineral processing plant of claim 1 , wherein:
the internal combustion engine has a maximum continuous power output equal to 3 times P;
the electric motor has a maximum rated power input equal to 2 times P plus or minus 30% of 2 times P; and
the generator has a maximum rated power output equal to P plus or minus 30% of P.
15 . The mineral processing plant of claim 1 , further comprising:
a first clutch configured to selectively couple the internal combustion engine to the crusher;
a second clutch configured to selectively couple the electric motor to the crusher;
wherein the first clutch and the second clutch are combined in one assembly as a double clutch.
16 . The mineral processing plant of claim 15 , wherein:
the first and second clutches are fluid clutches, dog clutches, multi-disk clutches or free-wheel clutches.
17 . The mineral processing plant of claim 1 , wherein:
in a start-up mode of operation with the crusher at a standstill, the internal combustion engine is started and brought up to an operating speed, and then power transmission from the internal combustion engine to the crusher is built up over a period of time.
18 . The mineral processing plant of claim 1 , wherein:
in a start-up mode of operation with the crusher at a standstill, the crusher is first started up by the electric motor, and then the internal combustion engine is coupled to the crusher by a clutch.
19 . A method of operating a mineral processing plant for crushing mineral material, the mineral processing plant including a crusher, an internal combustion engine, an electric generator mechanically coupled to the internal combustion engine, and an electric motor separate from the electric generator, the method comprising:
in a first mode of operation mechanically coupling the internal combustion engine to the crusher and driving the crusher with the internal combustion engine; and
in a second mode of operation mechanically coupling the electric motor to the crusher and driving the crusher with the electric motor.
20 . The method of claim 19 , further comprising:
in a third mode of operation mechanically coupling both the internal combustion engine and the electric motor to the crusher and driving the crusher with both the internal combustion engine and the electric motor.