31 results about "Elemental carbon" patented technology

Disclosed in the present invention are a C-TiO2 composite material using a carbon source as a raw material, a preparation method therefor and the use thereof. The preparation method comprises: dispersing a carbon source and TiO2 powder in a polar solvent to obtain a suspension A; heating the suspension A under a stirring condition, and volatilizing the polar solvent to obtain a mixture B; and calcining the mixture B to obtain a C-TiO2 composite material, wherein the carbon source comprises a first carbon source and / or a second carbon source, the first carbon source is elemental carbon, and the second carbon source is an organic matter that can be pyrolyzed to generate carbon. The present invention uses recycled or cheap carbon sources as raw materials to prepare the C-TiO2 composite material, which can effectively reduce environmental pollution caused by decommissioned new energy power lithium batteries while providing a feasible solution for the high-value utilization of cheap carbon sources. The C-TiO2 composite material is applied to the field of electrocatalytic water splitting to prepare efficient and stable oxygen evolution catalytic electrodes, thus realizing ampere-level current density applications oriented to industrial requirements.

The application belongs to the field of detection and analysis, and particularly relates to a method for detecting free carbon in cemented carbide mixture based on pretreatment, which comprises the following steps: S1, obtaining cemented carbide mixture, the components of the cemented carbide mixture including at least one of chromium carbide, silicon carbide and boron carbide, and grinding the cemented carbide mixture into cemented carbide mixture powder; S2, mixing, stirring and centrifugally separating the cemented carbide mixture powder and heavy liquid to obtain a mixture; taking out the upper layer liquid containing elemental carbon of the mixture and washing and solid-liquid separating to obtain an initial sample to be detected; S3, rinsing and drying the initial sample to be detected to obtain a final sample to be detected, and detecting the final sample to be detected to obtain the content of free carbon. Through the improved pretreatment detection method of free carbon in cemented carbide mixture, the accuracy and efficiency of detection are improved, the range of detection of free carbon in cemented carbide is expanded, and the method is suitable for more kinds of carbides.

The application discloses a preparation method of a bismuth single element / bismuth oxide / carbon nitride composite material and application of the bismuth single element / bismuth oxide / carbon nitride composite material as a chlorine removal agent, and the bismuth single element / bismuth oxide / carbon nitride composite chlorine removal agent is prepared by taking bismuth nitrate pentahydrate as raw material and introducing melamine precursor. In the process of calcination, the melamine generates elemental carbon and carbon monoxide, and plays a regulating role in the morphology of the chlorine removal agent; the reducing property generated in the forming process can convert Bi 3+ into Bi single element, and the surface plasmon resonance effect of the Bi single element is utilized to improve the photocatalytic chlorine removal performance of the composite chlorine removal agent.

Identifying and quantifying tire wear includes heating a sample including particulate matter obtained from tire wear and soot to a first temperature to thermally desorb an amount of organic carbon from the sample, cooling the sample from the first temperature to a second temperature, heating the sample from the second temperature to a third temperature to thermally desorb an amount of elemental carbon from the sample, and identifying an amount of tire wear particulate matter in the sample based on the amount of elemental carbon in the sample.

The application relates to a preparation method of gaseous elemental carbon for synthesizing silicon carbide, which comprises the following steps: S1, placing a carbon source in a reaction chamber 1, heating the carbon source, and obtaining gaseous elemental carbon, wherein the carbon source is high-purity fullerene; S2, placing a silicon source in a reaction chamber 2, heating the silicon source, and heating to 1100-1900 DEG C; S3, under the protection of an inert gas atmosphere, the gaseous elemental carbon flows into the reaction chamber 2, heat preservation reaction is carried out for 4-10 h, the gaseous elemental carbon reacts with the silicon source, and after the reaction is completed, cooling is carried out, and silicon carbide is obtained. The silicon carbide prepared by the method has the characteristics of large particles and high purity, is beneficial to improving the performance of semiconductor materials, and has an excellent industrial application prospect.

This effectively reduces the possibility of damage to the sputtering target during the film deposition process. [Solution] The sputtering target (10) has a first region (10C) made of elemental carbon mixed with a second region (10M) made of an insulator.

The invention relates to a method for analyzing carbon content in a liquid biological sample and a carbon content element analyzer. The method comprises the following steps: unfreezing the biological sample to a liquid state; transferring the biological sample into a glove box; a tin cup is taken to be heated, and the tin cup is put into a glove box after being heated; a biological sample is taken and placed in a tin cup, and the mass of the biological sample in the tin cup is weighed; sealing the opening of the tin cup; the tin cup is moved to a sample disc of an element analyzer, the biological sample is subjected to high-temperature oxidation in the element analyzer to generate corresponding gas, the gas is dried and then subjected to carbon content analysis, the carbon content in the biological sample is obtained, and in the drying process, the mixture is adopted as a drying agent for drying. The drying tube is arranged in the elemental analyzer, the drying agent is optimized, the sample quality is controlled, the influence of moisture on carbon content analysis is reduced, the sample does not need pretreatment such as freeze-drying, and the sample pretreatment time is saved.

A reactor for the thermal decomposition of a gaseous hydrocarbonaceous feedstock stream in an electrically heated moving bed composed of an electrically conductive granular material with deposition of elemental carbon on the granular material comprises an upper reactor section in which there are disposed a feed for the granular material and an outlet for a hydrogenous product stream, a middle reactor section, and a lower reactor section in which there is disposed a feeding device for the gaseous hydrocarbonaceous feedstock stream, and on the bottom side there is provided an outlet for the granular material, wherein the outlet comprises at least one funnel-shaped oscillating base that can be set in oscillation in vertical and / or horizontal direction by means of at least one first vibration generator and is connected to the lower reactor section via an oscillation-decoupling suspension.

The application discloses a method for recycling valuable metals in electroplating sludge, and relates to the technical field of solid waste resource utilization, comprising the following steps: uniformly mixing the electroplating sludge with a desulfurizer, heating and stirring to obtain a solid-liquid mixture; filtering the solid-liquid mixture to obtain filtrate and filter residue; crystallizing and separating the filtrate to obtain the desulfurizer and sodium sulfate crystals, and drying the filter residue to obtain dry matter; uniformly mixing the dry matter with elemental silicon and elemental carbon, smelting under an inert atmosphere, cooling and dust collecting the high-temperature flue gas generated in the smelting process to obtain lead-zinc-containing dust, and separating the alloy ingot and slag after natural cooling at room temperature after the smelting is completed. The desulfurization rate of the application is more than 90%, and the valuable metal recovery rate is more than 95%, so that the electroplating sludge can be desulfurized at low cost and the valuable metal resources can be efficiently and comprehensively recycled, and the application has the advantages of simple operation, large processing capacity and strong adaptability.

Producing hydrogen gas includes combining a gaseous feedstock stream with a particulate catalyst, wherein the gaseous feedstock stream comprises a gaseous hydrocarbon, and the particulate catalyst is selected to promote decomposition of the gaseous hydrocarbon; entraining the particulate catalyst in the gaseous feedstock stream to yield an aerosolized reaction mixture comprising aerosolized catalyst particles; and heating the aerosolized reaction mixture to decompose the gaseous hydrocarbon, thereby yielding a product stream comprising elemental carbon and hydrogen gas.

A hot rolled steel sheet having a composition comprising of the following elements 0.03% ≤ Carbon ≤ 0.070 %, 0.4 % ≤ Manganese ≤ 0.9%, 0.01% ≤ Aluminum ≤ 0.08 %, 0.01% ≤ Niobium ≤ 0.08%, 0.01 % ≤ Titanium ≤ 0.1%, 0.0005% ≤ Calcium ≤ 0.005%, 0% ≤ Phosphorus ≤ 0.03 %, 0 % ≤ Sulfur ≤ 0.015 %, 0 % ≤ Nitrogen ≤ 0.02%, 0.001% ≤ Silicon ≤ 0.09%, 0% ≤ Chromium ≤ 0.2%, 0.% ≤ Copper ≤ 0.25%, 0% ≤ Nickel ≤ 0.2%, 0% ≤ Molybdenum ≤ 0.2%, 0% ≤ Vanadium ≤ 0.1%, 0 % ≤ Boron ≤ 0.003%,0 % ≤ Magnesium ≤ 0.010%,0% ≤ Cerium≤ 0.1%, 0% ≤ Zirconium ≤ 0.010%,the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of said steel sheet comprising in area fraction 65% to 95% Ferrite, 5% to 35% Bainite, Pearlite up to 3%, martensite and residual austenite up to a cumulated fraction of 2%, wherein the said hot rolled steel sheet has an inclusion density of at least 100 inclusions per square micro-meter and the inclusions having a size of 2 microns or more being 30% or less of the total number of inclusions.

This invention discloses a silicon carbide micropowder and its preparation method, relating to the field of semiconductor technology. The preparation method includes reacting elemental silicon and elemental carbon in a vacuum environment to obtain a first silicon carbide powder; processing the first silicon carbide powder into a second silicon carbide powder with a D50 of 0.5mm-2.5mm; and cleaning the second silicon carbide powder to obtain silicon carbide micropowder; wherein the cleaning includes electrochemical cleaning using a magnetic field synergistic with a pulsed field. No fluoride or chloride ions are introduced during the cleaning process, and no volatile acids are generated in the neutral electrolyte; metallic impurities (such as Fe and Cr) are enriched by cathode deposition with a recovery rate ≥95%, resulting in near-zero heavy metal emissions; ozone is continuously added through a closed-loop system, and unreacted ozone is converted into O2 by a catalyst and discharged, effectively controlling waste gas generation; the wastewater after cleaning treatment can meet the GB 8978-2002 Class I emission standard after simple neutralization, and is expected to be widely applied.

A hot rolled steel having a composition including comprising of the following elements 0.01%≤Carbon≤0.1%, 0.2%≤Manganese≤2%, 0.2%≤Silicon≤1.5%, 0.01%≤Aluminum≤2%, 0.1%≤Tin≤1%, 0.1%≤Copper≤0.5%, 0.001%≤Niobium≤0.1%, 0.002%≤Phosphorus≤0.02%, 0%≤Sulfur≤0.005%, 0%≤Nitrogen≤0.01%, with 0.3%≤Sn+Cu≤1.2% and can contain one or more of the following optional elements 0%≤Titanium≤0.1%, 0%≤Vanadium≤0.1%, 0%≤Chromium≤1%, 0%≤Molybdenum≤0.5%, 0%≤Calcium≤0.01%, 0%≤Boron≤0.01%, 0%≤Magnesium≤0.05%, 0%≤Calcium≤0.01%, 0%≤Cerium≤0.1%, 0%≤Boron≤0.05%, 0%≤ Nickel≤0.01%, the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of said steel sheet including in area fraction, 75% to 95% Ferrite, 1% to 15% Pearlite and optionally Bainite is between 0% and 25% wherein the average grain size of all the microstructural constituent is less than 15 microns.

The proposed ceramic sinter body contains a first determined element, selected from five or six elements chosen from titanium (Ti), vanadium (V), zirconium (Zr), niobium (Nb), molybdenum, hafnium (Hf), tantalum (Ta), and tungsten (W); a second determined element, selected from yttrium (Y) and aluminum (Al); and elemental carbon (C). The total amount of the first determined element, the second determined element, and the elemental carbon contained in the ceramic sinter body is 98 atomic percent or more. The amount of the second determined element contained in the ceramic sinter body is 3,000 atomic ppm or less. The amount of carbon contained in the ceramic sinter body is 45 atomic percent or more and 55 atomic percent or less. The ceramic sinter body has a single-phase microstructure in which the first determined element forms a solid solution.

A ceramic sintered body which contains a first particular element consisting of five or six elements selected from among titanium (Ti), vanadium (V), zirconium (Zr), niobium (Nb), molybdenum (Mo), hafnium (Hf), tantalum (Ta), and tungsten (W); a second particular element consisting of one element selected from yttrium (Y) and aluminum (Al); and elemental carbon (C). The total amount of the first particular element, the second particular element, and elemental carbon contained in the ceramic sintered body is 98 at % or more. The amount of the second particular element contained in the ceramic sintered body is 3,000 at. ppm or less. The amount of carbon contained in the ceramic sintered body is 45 at % or more and 55 at % or less. The ceramic sintered body has a single phase microstructure in which the first particular element forms a solid solution.

A cold rolled and heat treated steel sheet having a composition including the following elements: 0.1%≤Carbon≤0.5%, 1%≤Maganeses≤3.4%, 0.5%≤Silicon≤2.5%, 0.01%≤Aluminum≤1.5%, 0.05%≤Chromium≤1%, 0.001%≤Niobium≤0.1%, 0%≤Sulfur≤0.003%, 0.002%≤Phosphorus≤0.02%, 0%≤Nitrogen≤0.01%, 0%≤Molybdenum≤0.5%, 0.001%≤Titanium≤0.1%, 0.01%≤Coppers≤2%, 0.01%≤Nickel≤3%, 0.0001%≤Calcium≤0.005%, 0%≤Vanadium≤0.1%, 0%≤Boron≤0.003%, 0%≤Ceriurm≤0.1%, 0%≤Magnesium≤0.010%, 0%≤Zirconium≤0.010% the remainder composition being composed of iron and the unavoidable impurities, and a microstructure of the rolled steel sheet includes by area fraction, 10% to 60% Bainite, 5% to 50% Ferrite, 5% to 25% Residual Austenite, Martensite 2% to 20%, Tempered Martensite 0% to 25%, the balance being Annealed Martensite, which content shall be from 1% to 45%.

The invention discloses a method for predicting unit calorific value carbon content based on coal quality industrial analysis data. The method comprises the following steps: 1, acquiring multi-database coal type industrial analysis data, element analysis data and calorific value; 2, calculating dry ash-free basis volatile components, hydrogen elements, carbon elements, sulfur elements and lower calorific values of the database coal types; step 3, calculating a carbon hydrogen ratio and a unit calorific value carbon content of a dry ash-free base of the coal type in the database; step 4, through linear fitting, respectively obtaining a function relationship between a volatile component, a sulfur content, a calorific value and a carbon content per unit calorific value of the coal type drying ash-free basis in the database; 5, a new parameter A0 is obtained, and the new parameter and the unit calorific value carbon content are subjected to linear fitting; 6, sampling the target coal for industrial analysis, and detecting the calorific value and the sulfur content of the target coal at the same time; step 7, calculating dry ash-free basis volatile sulfur content, lower calorific value and parameter A0 of the target coal type; 8, predicting the dry ash-free basis unit calorific value carbon content of the target coal type; step 9, calculating the unit calorific value carbon content of the target coal type; the method can accurately predict the unit calorific value carbon content of the bituminous coal, and guides the coal purchase.

The application discloses a method for cooperatively roasting and magnetically separating and enriching gold and iron by using carbonaceous gold ore and cyanidation tailings, fully utilizes the mineralogical characteristics of the carbonaceous gold ore and the cyanidation tailings, and roasts the carbonaceous gold ore and the cyanidation tailings after cold-pressing and forming in an air-tight manner, so that the hematite in the cyanidation tailings is controllably reduced into magnetite by carbonaceous substances and pyrite in the carbonaceous gold ore, iron concentrate is obtained through roasting, grinding, screening and magnetic separation, and gold is maximally enriched in the tailings of the magnetic separation and is recovered through a subsequent leaching process. In the roasting process, the hematite in the cyanidation tailings and the pyrite in the minerals have redox reactions with carbon monoxide, elemental carbon and the pyrite generated by pyrolysis of the organic carbon, which not only eliminates the gold-killing effect of the organic carbon, but also destroys the pyrite and hematite inclusions of gold, and simultaneously realizes the efficient separation and comprehensive utilization of gold and iron in the carbonaceous gold ore and the cyanidation tailings.

The application discloses a regression calculation method for received base element carbon content of coal, and belongs to the technical field of received base element carbon content measurement of coal, which comprises the following steps: obtaining coal quality original data after analysis and measurement, performing maximum minimum normalization processing to obtain normalized original data, training and authenticating a MISM received base element carbon content regression calculation model of coal by using the normalized original data, processing actual measured coal quality original data by using the trained and authenticated model, and calculating the received base element carbon content of coal. The application designs the MISM received base element carbon content regression calculation model of coal, can capture important features of coal quality data, establish the relationship between the coal quality data and the received base element carbon content of coal, and can obtain the received base element carbon content of coal through regression calculation only by measuring part of the coal quality original data, so that the detection cost of the received base element carbon content of coal is reduced, and the accuracy of the calculation result is ensured.

The invention discloses a preparation method of ZrO2 toughened metal ceramic. The preparation method comprises the following steps: ZrO2, ceramic-based phase powder and elemental carbon are uniformly mixed, a high-temperature carbon thermal reaction is carried out, compound ceramic powder is formed, and the ceramic-based phase powder comprises TiO2; uniformly mixing the compound ceramic powder with the metal binding phase powder; the mixture is subjected to rapid hot pressing sintering under the anaerobic condition, and a metal ceramic composite precursor is obtained; and under the condition of controlling the oxidation strength, oxidation sintering is carried out, the ZrO2 toughened metal ceramic is obtained, and the oxidation strength is smaller than or equal to the critical strength required for completely converting the Zr element into ZrO2. As the ZrO2 strengthening phase is generated in situ through carbonization dispersion and oxygen-controlled oxidation, the problem of easy agglomeration caused by direct doping sintering of exogenous ZrO2 powder is avoided, the toughening characteristic of ZrO2 is fully played, and the finally obtained ZrO2 toughened metal ceramic has obviously stronger toughness.

The application relates to a preparation method and application of a hydrogen production molten catalyst for hydrocarbon cracking, which comprises adding bismuth in nickel-molybdenum oxide to form a modified NiMo-Bi liquid alloy so as to produce a ternary Ni 3x Mo x -Bi liquid alloy catalyst. The catalyst has low activation energy, can crack methane at 450 DEG C-1000 DEG C, and has high hydrogen production efficiency. At 800 DEG C, the Ni 12 Mo4-Bi catalyst has 100% H2 selectivity and 260 hours of stability. At 1000 DEG C, the 1cm Ni 12 Mo4-Bi catalyst can obtain 62% methane conversion. The application adopts the low-melting-point molten alloy NiMo-Bi as the catalyst, combines the high activity of a nickel-based catalyst for hydrocarbons and the low melting point of a bismuth-based alloy, has high activity and high stability, can effectively crack hydrocarbons, and can continuously and efficiently produce hydrogen through catalytic cracking. Another product of cracking can be separated through water washing to obtain elemental carbon, thereby solving the problems of poor stability, poor carbon deposition resistance and easy deactivation of existing Ni-based supported catalysts or other solid catalysts.

The invention relates to the technical field of batteries, in particular to a diaphragm and a battery. The diaphragm comprises a base material layer and a first coating located on the surface of one side or two sides of the base material layer, the first coating comprises first particles, the first particles are prepared from a first compound, the first compound comprises a pyrimidine group and a characteristic group, the characteristic group is selected from at least one of carbonyl, amino, cyano, halogen and hydroxyl, and the characteristic group is selected from at least one of pyrimidine, cyano, halogen and hydroxyl. The first coating comprises element carbon and element nitrogen, the diaphragm meets the following relational expressions: 0.2 < = a < = 0.6, 0.1 < = b < = 0.45, 0.15 < = M < = 0.8, 32% < = q < = 60%, M = b / a, a is the weight ratio of the element carbon on the surface of the first coating, b is the weight ratio of the element nitrogen on the surface of the first coating, and q is the porosity of the base material layer. According to the diaphragm, the migration rate of lithium ions can be increased, the interface impedance between the diaphragm and a pole piece is reduced, and the normal-temperature rate performance and the low-temperature cycle performance of a battery are improved.

The application discloses a method for generating boron carbide-based wear-resistant ceramic material with uniform carbon distribution in situ, the boron carbide-based wear-resistant ceramic material and application thereof, and the method comprises the following steps: adding superfine TiC and B4C to generate elemental carbon and TiB2 in situ through hot-pressing sintering; and promoting the full reaction of the TiC and the B4C and the uniform distribution of the elemental carbon through a multi-step hot-pressing sintering process, so that the elemental carbon in the boron carbide composite ceramic sintered through the hot-pressing sintering is small and uniformly distributed. Meanwhile, the TiB2 generated in situ is uniformly distributed in the boron carbide composite ceramic, so that the fracture toughness of the ceramic is improved.

A preparation method of ultra-micro carbon iron alloy material, high-carbon iron alloy blocks are pulverized, sprayed into a suspension roasting furnace in an oxygen-rich environment for spontaneous heating partial oxidation, the partially oxidized powder is cooled, and the carbon and oxygen element contents are detected, then the partially oxidized powder is mixed with un-oxidized high-carbon iron alloy powder according to the proportion, and the mixture is uniformly mixed, briquetted, and then put into a vacuum sintering furnace for deep decarburization and deoxidation, after the reaction is completed, the material in the furnace is cooled and discharged to obtain the ultra-micro carbon iron alloy material. The invention utilizes the combustible characteristics of elemental carbon and iron in high-carbon iron alloy material under certain conditions, accurately controls the decarburization and oxygenation conditions, and the material in the suspension state is not sintered, the decarburization is uniform without the need for secondary grinding, and no additional heat source is needed, thereby effectively reducing the production cost, improving the product quality, and producing the ultra-micro carbon iron alloy material after vacuum sintering.

The present invention relates to a method and device for transforming carbon dioxide (CO2) into its elements, C and O2, by means of the combined use of laser irradiation (4) and dielectric barrier discharge plasma (1) which are applied to high-melting-point ceramic or metallic substrate catalysts in a chamber (2). In this way, laser radiation increases the temperature only in the area in which it is applied, to the catalysts, in order for the emission plasma to reach a temperature close to 3400 K, capable of breaking down CO2, only in that area and not in the entire plasma reactor chamber.

The invention relates to the technical field of carbon emission statistics of thermal power enterprises, and discloses a carbon emission data abnormity identification and early warning method and device. According to the method, a multi-dimensional anomaly identification and early warning mechanism is constructed by fusing multi-source data such as carbon emission online monitoring data, daily coal quality test data, coal quality parameter reference values and the like; comprising abnormity identification and early warning based on comparison of a monitoring method and an accounting method, abnormity identification and early warning based on element carbon content fitting and abnormity identification and early warning based on a unit heat value carbon content recommendation value, and accurate identification and timely early warning of carbon emission data abnormity of thermal power enterprises are realized. By establishing an elemental carbon content fitting formula and calculating a fitting value by using daily coal quality data, daily monitoring of the elemental carbon content is realized, the problem of elemental carbon content detection lag is solved, and carbon emission data abnormity can be identified in time.

Producing hydrogen gas includes combining a gaseous feedstock stream with a particulate catalyst, wherein the gaseous feedstock stream comprises a gaseous hydrocarbon, and the particulate catalyst is selected to promote decomposition of the gaseous hydrocarbon; entraining the particulate catalyst in the gaseous feedstock stream to yield an aerosolized reaction mixture comprising aerosolized catalyst particles; and heating the aerosolized reaction mixture to decompose the gaseous hydrocarbon, thereby yielding a product stream comprising elemental carbon and hydrogen gas.

The present invention provides a non-heat treated steel wire rod having excellent cold forgeability and a manufacturing method thereof. According to one embodiment of the present invention, the non-heat treated steel wire rod having excellent cold forgeability contains, by weight, carbon (C): about 0.20% to 0.40%, silicon (Si): about 0.10% to 0.30%, manganese (Mn): about 1.30% to 1.60%, phosphorus (P): about more than 0% to 0.05%, sulfur (S): about more than 0% to 0.05%, chromium (Cr): about 0.02% to 0.30%, nickel (Ni): about 0.02% to 0.30%, molybdenum (Mo): about 0.02% to 0.30%, vanadium (V): about 0.01% to 0.15%, Niobium (Nb): approximately 0.01% to 0.05%, aluminum (Al): approximately 0.005% to 0.060%, titanium (Ti): approximately 0.005% to 0.020%, copper (Cu): approximately 0.01% to 0.30%, boron (B): approximately 0.0001% to 0.0020%, nitrogen (N): approximately 0.005% to 0.015%, and the balance includes iron (Fe) and other unavoidable impurities, and the total of the niobium (Nb) and the vanadium (V) is approximately 0.02% to 0.2%, and a tensile strength of approximately 900 MPa or more can be achieved.

The application discloses a waste battery material powder and a preparation method and application thereof, and belongs to the technical field of battery recycling. The waste battery material powder comprises metal compound powder and elemental carbon material, the content percentage of carbon elements in the waste battery material powder is 10wt%-40wt%, and I D / I G ≤0.5, wherein I D , I G are the intensity of D-band characteristic peaks and G-band characteristic peaks in a Raman spectrum of the waste battery material powder respectively. The waste battery material powder has a lower I D / I G value, indicating that the waste battery material powder has a lower content of amorphous carbon and a lower oxidation degree of graphite; the waste battery material powder meeting the conditions of the content percentage of carbon elements being 10wt%-40wt% and I D / I G ≤0.5 has a good metal recovery rate in a hydrometallurgical process, and the obtained graphite residue can have good regeneration capacity.

The present application relates to solid waste resource utilization technical field, disclose a kind of methods for preparing silicon micro powder based on chlorination waste brine quenching slag in situ carbothermal reduction, method includes: S1, the molten salt chlorination waste brine quenching slag is carried out drying and ball milling treatment, and pretreatment material is obtained;S2, pretreatment material is carried out magnetic separation, and non-magnetic mixture is obtained;S3, after non-magnetic mixture and mixed acid are carried out acid dipping reaction, solid-liquid separation is carried out, and the silicon-rich filter residue containing silicon dioxide and elemental carbon is obtained;S4, after silicon-rich filter residue is washed and dried, silicon dioxide and elemental carbon in it are made to carry out carbothermal reduction reaction under inert atmosphere, and silicon micro powder product is obtained.The purity and resource utilization rate of silicon micro powder product are improved by the scheme of the present application, and high-value and clean utilization of waste water quenching slag is realized.