Crucible made from green oil coke and water-soluble adhesive and manufacturing method of crucible

Abstract

The invention relates to a crucible made from green oil coke and water-soluble adhesive and a manufacturing method of the crucible. The method includes the steps of smashing green oil coke into particles with granularity smaller than 4 mm, mixing water-soluble organic solvent with diluent to prepare an adhesive solution, mixing and stirring the adhesive solution and smashed green oil coke according to a certain proportion to obtain slurry, putting the slurry in a crucible mold, and forming a crucible wet blank through a mechanical vibration or pressure forming method, taking out the formed crucible wet blank to stand, conducting drying and demolding to obtain a crucible rough blank, and adding a carbon negative electrode material into the crucible rough blank to conduct graphitizing to obtain the qualified crucible. The crucible has the advantages of being capable of saving energy, environmentally friendly, ecological, low in cost, high in production efficiency, low in requirement for plants and devices, low in rejection rate, and the like.

Description

technical field [0001] The invention relates to the technical field of crucible manufacture, in particular to a crucible manufactured with raw petroleum coke and a water-soluble binder and a manufacturing method thereof. Background technique [0002] Lithium-ion batteries have been widely used in military and civilian small appliances because of their advantages such as high energy, high battery voltage, wide operating range, and long storage life. The negative electrode material is one of the key materials of lithium-ion batteries, and carbonaceous materials are commonly used as negative electrode materials for lithium-ion batteries. At present, the commonly used carbon negative electrode materials mainly include natural graphite and artificial graphite. Natural graphite contains many mineral impurities, and the production efficiency It is not high, which seriously restricts the refined development and application of natural graphite. [0003] Artificial graphite is obtain...

AI Technical Summary

Problems solved by technology

When mesophase pitch carbon microspheres are used as anode materials for lithium-ion batteries, it is necessary to fill non-graphitized carbon anode powder in a carbon crucible made of graphite material, and then put the crucible into a graphitization furnace for graphitization treatment above 2800 °C , this kind of crucible made of graphite material is very expensive, which greatly increases the production cost of negative electrode materials

[0004] The currently used crucible for the production of carbon negative electrode materials is made of petroleum coke through calcination, crushing, mixing with asphalt binder, extrusion or molding, roasting, graphitization, etc., and then made into carbon by mechanical processing. The main defects of this kind of crucible are as follows: 1. The production process is complicated. Petroleum coke is used for calcination, crushing, mixing with asphalt binder, extrusion or molding, roasting, graphitization and mechanical processing. All have specific process requirements, the production process is very complicated; the production cycle is long

From the input of raw materials to the delivery of finished products, the production cycle is as long as about 3 months; 2. The finished product rate is low, and waste products are prone to be produced due to the cracking of the blank during the production process, and the space must be taken out of the blank during machining to serve as a carbon negative electrode. The container of the material turns the good blank into useless cutting powder, and the effective utilization rate of the blank is only about 43%. Crucible, if you want to process crucibles of other shapes, the loss of the blank will be greater, and the yield of the product will be lower; 4. Energy consumption, high temperature is required for mixing, roasting and graphitization in the production process, resulting in a large amount of energy consumption; 5. Environmental pollution, dust and smoke cannot be effectively controlled during the production process, the working environment is harsh, and the asphalt releases toxic gases during the roasting and graphitization process; 6. The production cost is high, due to the need for roasting or graphitization to produce the crucible, it needs to be consumed A large amount of energy, coupled with a high scrap rate, requires a crucible cost of about 4000-5000 yuan to produce one ton of negative electrode powder

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