9results about How to "High fixed carbon content" patented technology

The invention relates to the technical field of battery materials, in particular to a graphite negative electrode material and a preparation method and application thereof. The graphite negative electrode material comprises graphite particles, the average length La of the graphite particles in the alpha-axis direction of microcrystals is larger than or equal to 40 nm, the average thickness Lc of the graphite particles in the c-axis direction of the microcrystals is larger than or equal to 25 nm, and the interlayer spacing d002 ranges from 0.336 nm to 0.338 nm, and the number parameter of the microcrystals contained in each single graphite particle is defined as N = D503 / (La2 * Lc); d50 is the median particle size of the graphite particles, the unit is [mu] m, and the numerical value of N is more than 0 and less than or equal to 0.04. The graphite negative electrode material disclosed by the embodiment of the invention comprises the graphite particles with stable microcrystalline structure, large microcrystalline size and large interlayer spacing, so that the expansion and stress distribution uniformity of the negative electrode material in the circulation process is improved, the diffusion of ions in the graphite particles is facilitated, the consumption of active lithium is reduced, and the service life of the negative electrode material is prolonged. And the dynamic and super-long cycle stability of the graphite negative electrode material is improved.

A waterproof, highly durable, and high density biochar particle is described. In some variations, a method of making biochar particles includes pyrolyzing a biomass-containing feedstock in a pyrolysis reactor, thereby producing a biochar-containing solid material and a pyrolysis vapor; introducing the pyrolysis vapor into a separation system configured to recover the pyrolysis condensate in liquid form separated from the non-condensable gas; capturing the pyrolysis condensate as a polyphenol material; contacting the solid material containing biological carbon with a polyphenol material to generate an intermediate mixture; introducing the intermediate mixture into a densification unit, thereby producing a biochar particle precursor; and subjecting the biochar particle precursor to at least partial drying, thereby producing biochar particles characterized by a 24-hour water absorption of about 20 wt% or less as measured at 25 DEG C and 1 bar. The biochar particles can be stacked outdoors, which has logistics convenience at a manufacturing site, such as an industrial metal smelting plant in which the biochar particles are fed in a process.

The application discloses a method for preparing direct reduced iron from iron-containing raw materials with near-zero carbon, and belongs to the technical field of steel metallurgy. The method comprises the following steps: uniformly mixing iron-containing raw materials, an organic-inorganic composite binder, biomass carbon and water, and then sequentially performing high-pressure forming and drying and solidification to obtain cold briquetting; and the cold briquetting is reduced by pure hydrogen to obtain direct reduced iron. The method can prepare cold briquetting suitable for the performance requirements of a shaft furnace for direct reduction at a relatively low temperature (<300 DEG C), and further prepares direct reduced iron by pure hydrogen reduction. The method has a short process flow, near-zero carbon emission, and provides a new technical route for the green and low-carbon transformation of the steel industry.

The invention discloses a method for preparing a graphite carburant by utilizing carbon raw scraps, which comprises the following steps: firstly, cleaning and drying the collected carbon raw scraps to remove surface impurities, then crushing the carbon raw scraps into crushed materials, carrying out primary acid pickling and flushing, drying, and grinding into powder. Mixing the powder with powder with the same particle size, carrying out acid pickling, washing, separating and drying again, then adding purified graphite powder, carbon black powder, SiC powder and methyl methacrylate and hydroxyl polydimethylsiloxane in a specific proportion, uniformly stirring, and molding to prepare a graphite carburant semi-finished product; finally, the semi-finished product is subjected to high-temperature graphitization treatment, cooling, cleaning and drying, and the final graphite carburant product is obtained. According to the method, the graphite carburant is prepared by using the carbon raw scraps as the raw material, so that the problems of the traditional carburant are solved, the production cost is remarkably reduced, the utilization efficiency of resources is improved, and remarkable economic and environmental benefits are shown.

The invention belongs to the technical field of mineral processing, and particularly relates to a method for extracting pure natural crystalline flake graphite through selective flotation of modified water glass. According to the method, different modified water glass is adopted for different graphite ores for the first time, and the product with high fixed carbon content and high recovery rate is obtained through cooperation of the flotation technology. The method comprises the following steps: crushing and grinding natural crystalline flake graphite ore to set fineness, then mixing with water to prepare ore pulp, adding a pH regulator to regulate the pH of the ore pulp, then adding modified water glass according to a set dosage, then sequentially adding a collecting agent and a foaming agent, and finally carrying out air inflation and foam scraping to obtain flotation concentrate. The process is simple and controllable, the fixed carbon content of the product obtained through roughing can be further improved after fine selection, and industrial application is facilitated.

The present application discloses an application of a carbon material in the preparation of a battery, wherein the carbon material is prepared from biochar. The present application also discloses a biochar prepared by the above method and the application of the biochar in fuel, gasification raw material for a gasifier, and carbon material for a battery. The biochar of the present application has moderate volatile matter content, low sulfur content, uniform particle size, high bulk density, low ash content, high calorific value, low production cost, and significant economic benefits. It is a clean and renewable biomass energy source. The biochar of the present application can be used in fuel, gasification raw material for a gasifier, carbon material for a battery, and soil conditioner.

The invention provides a method for measuring the granularity of graphite in crystalline flake graphite ore, which comprises the following steps of: drying and crushing graphite ore, sequentially carrying out static acid leaching treatment, ultrasonic acid leaching treatment, vacuumizing and pressurized acid leaching treatment, washing to be neutral, carrying out suction filtration, and drying to finally obtain a high-purity graphite product, the granularity of the graphite in the crystalline flake graphite ore can be accurately determined by standard screening. The method has the advantages that the steps are simple, the operation is convenient, the high-purity graphite product can be obtained on the premise of maintaining the integrity of the graphite, and the graphite granularity in the crystalline flake graphite ore can be accurately measured.

The utility model relates to the technical field of comprehensive utilization of gasified ash, in particular to a gasified coarse slag sorting and upgrading system, which comprises a concentration cyclone, a fluidized bed sorting machine, a first high-frequency screen, a grading cyclone, a spiral sorting machine, a second high-frequency screen, a laminated fine screen and a concentration tank, an underflow of the concentration cyclone is connected with an inlet of the fluidized bed sorting machine, a concentrate outlet of the fluidized bed sorting machine is connected with the classification cyclone, a tailing outlet of the fluidized bed sorting machine is connected with an inlet of the first high-frequency screen, an overflow outlet of the classification cyclone is connected with the concentration tank, and an underflow outlet of the classification cyclone is connected with an inlet of the spiral sorting machine; a concentrate outlet of the spiral sorting machine is connected with the laminated fine screen, a tailing outlet of the spiral sorting machine is connected with the second high-frequency screen, the laminated fine screen, the first high-frequency screen and the second high-frequency screen are connected with the concentration tank, and the device has the advantages of being simple in structure, easy to operate, maximized in gasification coarse slag sorting effect and benefit and the like.

The invention relates to the technical field of dry quenching dust removal, in particular to an automatic ash discharge device of a dry quenching primary dust removal and secondary dust removal system, a use method and an activated carbon preparation method, the device comprises a primary dust removal system, a primary dust removal buffer bin, an activation furnace, a secondary dust removal system and a controller; the output end of the primary dust removal system is communicated with the input end of the primary dust removal buffer bin, the output end of the primary dust removal buffer bin is communicated with the activation furnace through a double-layer valve, and the output end of the primary dust removal buffer bin is further provided with a second material level detector; the output end of the secondary dust removal system is communicated with the input end of the primary dust removal buffer bin through a pipe body, a valve is arranged on the pipe body, and a first material level detector is arranged at the output end of the secondary dust removal system; and the controller is respectively connected with the first material level detector, the second material level detector, the valve and the double-layer valve. The dedusting ash of the primary dedusting system and the secondary dedusting system is activated.