124results about How to "Reduction of recycling energy consumption" patented technology

The invention discloses a still kettle system for producing ardealite steam-pressing bricks. The still kettle system comprises a heat main steam source collecting box, a still kettle A, a still kettle B, a still kettle C, a still kettle D, a still kettle E, a steam source distribution pipe, a dead steam distribution pipe, a steam-steam pumping pipe A, a steam-steam pumping pipe B, a steam-steam pumping pipe C, a steam-steam pumping pipe D and a steam-steam pumping pipe E, wherein the main steam source collecting box is connected with the steam source distribution pipe through a steam source main valve A and a steam source main valve B; inlets of the still kettle A, the still kettle B, the still kettle C, the still kettle D and the still kettle E are connected with the steam source distribution pipe and the dead steam distribution pipe; outlets of the still kettle A, the still kettle B, the still kettle C, the still kettle D and the still kettle E are connected with the steam-steam pumping pipe A, the steam-steam pumping pipe B, the steam-steam pumping pipe C, the steam-steam pumping pipe D and the steam-steam pumping pipe E. Dead steam of the still kettles are subjected to temperature rise and pressure rise respectively through the steam-steam pumping pipes and then is gathered into the dead steam distribution pipe, therefore the dead steam can be recycled instead of being discharged, the recycling effect is better, and the maximum recycling and reusing purposes are achieved.

The invention provides a low-energy-consumption and low-Al-content recovery method for a lithium iron phosphate positive plate. The method comprises the following steps of firstly, crushing a to-be-recycled positive plate into coarse particles by using a crusher to obtain a crushed material with the particle size of 1-15mm; heating the primary crushed material to 350-500 DEG C in an inert atmosphere, keeping the temperature for 0.5-2 hours, cooling and discharging to obtain a calcined material; crushing the calcined material into powder by using a crusher to obtain a secondary crushed materialof which the D50 is 50-80 microns; and finally, grading the secondary crushed material by using an airflow grading machine to obtain the positive electrode material of which the Al content is less than 200ppm. Through primary crushing, calcining, secondary crushing and airflow grading, the positive electrode material can be separated and recycled from the aluminum foil; and in the process, low-energy-consumption and low-Al-content recovery of the positive electrode material can be realized by controlling process parameters such as the size of the primary crushed particles, the calcining temperature and time and the particle size of the secondary crushed particles.