Abstract A method of and a device for controlling admission of material consistency adjusting liquid to a powdery moist material to be shaped into balls by treatment in a ball rolling machine comprising an open ended ball rolling drum having an entrance end for the supply of said material and an exit end. A sieve is provided for separating balls of a prescribed size and the rest of material leaving the drum at the exit end thereof, a conveyor for conveying material passing through the sieve as return material back to the entrance end of the drum, means for supply of water to material charged into the drum at the entrance end thereof, means for controlling said supply of said material consistency adjusting liquid, and means for measuring the rate at which said return material is conveyed to the entrance end of the drum. A rate sensing governor senses variations in said rate of return material and provides an indication whether amplitude of oscillations in said rate is above or below a predetermined amplitude limit, the governor being arranged to in dependence of indication whether amplitudes are above or below said predetermined limit actuate a servomotor to adjust to liquid supply control means so as to increase or decrease, respectively, the supply of liquid.
A METHOD OF CONTROLLING A SUPPLY OF LIQUID TO A MATERIAL COMPOSITION ADAPTED TO BE FORMED INTO BALLS FOR SINTERING, SAID COMPOSITION BEING CONSTITUTED OF A SLICK CONSISTING OF A MIXTURE OF POWDERY IRON ORE MATERIAL AND AQUEPUS LIQUID IN A BALL ROLLING MACHINE COMPRISING AN OPEN ENDED ROTARY BALL ROLLING DRUM TO AN ENTRANCE END OF WHICH IS SUPPLIED A SUPPLY OF FRESH SLICK AND A SUPPLY OF SAID ORE MATERIAL WHICH HAS ALREADY PASSED THROUGH THE ROTARY DRUM AND WHICH AFTER HAVING LEFT THE DRUM AT AN EXIT END REMOTE FROM SAID ENTRANCE END, HAS PASSED THROUGH A SIEVE SEPARATING MATERIAL WHICH UPON PASSING THE DRUM IS BELOW A SIZE OF BALLS OF A PRESCRIBED SIZE TO BE PASSED ON AS A FINAL PRODUCT OF THE MACHINE, SAID SEPARATED SMALLERSIZED MATERIAL PASSING THROUGH THE SIEVE BEING RECONVEYED FROM SAID EXIT END BACK TO SAID ENTRANCE END OF THE DRUM AT A RATE CORRESPONDING SUBSTANTIALLY TO THE RATE OF WHICH SAID RECONVEYED MATERIAL PASSES THROUGH THE SIEVE, THE LIQUID CONTENT OF THE MATERIAL BEING TREATED IN THE DRUM BEING ADJUSTED BY VARYING A SUPPLY OF AQUEOUS LIQUID BEING ADDED TO THE MATERIAL SO AS TO CHANGE THE CONSISTENCY OF THE MATERIAL, MEASURING AMPLITUDES OF VARIATIONS IN THE RATE AT WHICH SAID MATERIAL IS RECONVEYED FROM SAID EXIT END TO SAID ENTRANCE END OF THE DRUM, ASCERTAINING WHETHER SAID AMPLITUDES INCREASE ABOVE OR DECREASE BELOW A PREDETERMINED VARIATION AMPLITUDE, INCREASING SAID RATE OF SUPPLY OF SAID CONSISTENCY ADJUSTING AQUEOUS LIQUID WHEN SAID AMPLITUDES INCREASE ABOVE SAID PREDETERMINED AMPLITUDE AND DECREASING SAID RATE OF SUPPLY OF SAID CONSISTENCY ADJUSTING AQUEOUS LIQUID WHEN SAID AMPLITUDES DECREASE BELOW SAID PREDETERMINED AMPLITUDE.
Claim 2
Independent Claim
278 words
A METHOD OF CONTROLLING A SUPPLY OF LIQUID TO A MATERIAL COMPOSITION ADAPTED TO BE FORMED INTO BALLS FOR SINTERING, SAID COMPOSITION BEING CONSTITUTED OF A SLICK CONSISTING OF A MIXTURE OF POWDERY IRON ORE MATERIAL AND AQUEPUS LIQUID IN A BALL ROLLING MACHINE COMPRISING AN OPEN ENDED ROTARY BALL ROLLING DRUM TO AN ENTRANCE END OF WHICH IS SUPPLIED A SUPPLY OF FRESH SLICK AND A SUPPLY OF SAID ORE MATERIAL WHICH HAS ALREADY PASSED THROUGH THE ROTARY DRUM AND WHICH AFTER HAVING LEFT THE DRUM AT AN EXIT END REMOTE FROM SAID ENTRANCE END, HAS PASSED THROUGH A SIEVE SEPARATING MATERIAL WHICH UPON PASSING THE DRUM IS BELOW A SIZE OF BALLS OF A PRESCRIBED SIZE TO BE PASSED ON AS A FINAL PRODUCT OF THE MACHINE, SAID SEPARATED SMALLERSIZED MATERIAL PASSING THROUGH THE SIEVE BEING RECONVEYED FROM SAID EXIT END BACK TO SAID ENTRANCE END OF THE DRUM AT A RATE CORRESPONDING SUBSTANTIALLY TO THE RATE OF WHICH SAID RECONVEYED MATERIAL PASSES THROUGH THE SIEVE, THE LIQUID CONTENT OF THE MATERIAL BEING TREATED IN THE DRUM BEING ADJUSTED BY VARYING A SUPPLY OF AQUEOUS LIQUID BEING ADDED TO THE MATERIAL SO AS TO CHANGE THE CONSISTENCY OF THE MATERIAL, MEASURING AMPLITUDES OF VARIATIONS IN THE RATE AT WHICH SAID MATERIAL IS RECONVEYED FROM SAID EXIT END TO SAID ENTRANCE END OF THE DRUM, ASCERTAINING WHETHER SAID AMPLITUDES INCREASE ABOVE OR DECREASE BELOW A PREDETERMINED VARIATION AMPLITUDE, INCREASING SAID RATE OF SUPPLY OF SAID CONSISTENCY ADJUSTING AQUEOUS LIQUID WHEN SAID AMPLITUDES INCREASE ABOVE SAID PREDETERMINED AMPLITUDE AND DECREASING SAID RATE OF SUPPLY OF SAID CONSISTENCY ADJUSTING AQUEOUS LIQUID WHEN SAID AMPLITUDES DECREASE BELOW SAID PREDETERMINED AMPLITUDE.
Claim 3
Dependent Claim
57 words
A method according to claim 1, characterized by increasing said supply of material consistency adjusting liquid when said amplitudes increase aBove a first predetermined limit and that said supply of material consistency adjusting liquid is decreased when said amplitudes decrease below a second predetermined limit, said second predetermined limit representing smaller amplitudes than said first predetermined limit.