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A method and material for preparing porous building materials using waste residue produced in the process of recycling valuable metals in waste lithium-ion batteries

A lithium-ion battery and valuable metal technology, applied in the field of porous building materials, to achieve the effect of no secondary pollution, mature technology, and solve the problem of harmless disposal

Active Publication Date: 2019-11-29
HUNAN BRUNP RECYCLING TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] By consulting a large number of references, it is found that so far, there are basically no technical personnel in China who are engaged in the preparation of porous building materials from the ferrite slag, carbon powder slag, and calcium carbonate slag produced in the process of recycling valuable metals in waste lithium-ion batteries. Research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The mass fractions are respectively 60%, 30%, and 10% of the ferrite slag, clay, and carbon powder slag, which are fully mixed, and then mixed with water with a total mass fraction of 30%, put into an aging warehouse and aged for 30 hours. Put the compounded material into the mud refining machine for mud refining. The mud material is extruded from the mud refining machine to form round mud bars, which are cut into small mud pieces and put into the disc granulator to roll into diameters. Small round particles of about 8-10mm are porous building material green bodies; put the green body into the dry phase and dry at 120°C for 1 hour, and then put the dried porous building material body into the muffle furnace Preheating and sintering are carried out, the preheating temperature and time are respectively 400°C and 15min, the sintering temperature and sintering time are respectively 1100°C and 15min, and finally cooled to obtain a porous building material. The prepared porou...

Embodiment 2

[0039] Fully mix the alumina slag, clay, carbon powder slag, and calcium carbonate slag with mass fractions of 40%, 45%, 10%, and 5%, respectively, and then add water with a total mass fraction of 25% to mix well and put it into the aging The warehouse is aged for 20 hours, and the aged mixture is put into the mud refining machine for mud refining. The mud material is extruded from the mud refining machine to form square mud bars, and the square mud bars are cut into cuboids, which are porous building materials. Blank; put the green body into the drying phase and dry at 105°C for 5 hours, then put the dried porous building material body into the muffle furnace for preheating and sintering, the preheating temperature and time are respectively 300°C and 40min, the sintering temperature and sintering time were 900°C and 4h, respectively, and finally cooled to obtain a porous building material. The prepared porous building material has a bulk density of 1850kg / m 3 , The compressi...

Embodiment 3

[0041] Fully mix the ferrite slag, clay, carbon powder slag, and calcium carbonate slag with mass fractions of 40%, 50%, 5%, and 5% respectively, and then add water with a total mass fraction of 22% to mix evenly and put it into the aging The chemical warehouse is aged for 48 hours, and the aged mixture is put into the mud refining machine for mud refining. The mud material is extruded from the mud refining machine to form round mud sticks, which are cut into small mud cubes and put into round mud sticks. Roll into small round pellets with a diameter of about 8-10mm in a pan granulator, which is the green body of porous building materials; put the green body into the drying phase and dry at 110°C for 2 hours, and then the dried porous building material The green body is put into a muffle furnace for preheating and sintering. The preheating temperature and time are 450°C and 10 minutes respectively, the sintering temperature and sintering time are 1200°C and 5 minutes, respectiv...

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Abstract

The invention belongs to the field of comprehensive utilization of industrial waste residues, and discloses a method for preparing a porous building material from waste residues produced in a process of recovering valuable metals in a waste lithium ion battery and the porous building material obtained by the method. The method comprises the following steps: (1) uniformly mixing the waste residues produced in the process of recovering the valuable metals in the waste lithium ion battery, clay and / or fly ash, adding water, and performing mixing to obtain a primary mixture; (2) aging and putting the primary mixture in a pugmill, and performing blank making and drying to obtain a dry blank; (3) calcining the dry blank, and performing cooling to obtain the porous building material, wherein the porous building material is prepared from the following materials in percentage by mass: 50 to 70 percent of the waste residues and 30 to 50 percent of the clay and / or the fly ash. According to the method, the porous building material is prepared by adopting the waste residues produced in the process of recovering the valuable metal in the waste lithium ion battery as a main material and utilizing a carbon powder residue and a calcium carbonate residue in the waste residues as a pore-forming agent, so that not only is the problem of environmental pollution solved, but also waste is turned into wealth.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of industrial waste residues, and in particular relates to a method for preparing porous building materials from waste residues produced in the process of recycling valuable metals in waste lithium ion batteries and the obtained porous building materials. Background technique [0002] Since its commercialization, lithium-ion batteries have been widely used in civilian and military fields, such as cameras, Mobile phones, notebook computers and portable measuring instruments, etc. At the same time, lithium-ion batteries have become one of the light-weight high-energy power batteries of choice for new energy electric vehicles. After 500-1500 charge-discharge cycles of lithium-ion batteries, the active materials will lose their activity, resulting in a decrease in the capacity of the battery and causing the battery to be scrapped. The widespread use of lithium-ion batteries will inevitably br...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C04B38/06C04B33/132
CPCC04B33/1327C04B33/1352C04B38/0025C04B38/068Y02P40/60
Inventor 张银亮唐红辉谭群英
Owner HUNAN BRUNP RECYCLING TECH CO LTD
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