163 results about "Anthracite" patented technology

The invention discloses an anthracite-based fast-charging carbon negative electrode material and a preparation method thereof.The preparation method comprises the steps that firstly, component separation is conducted on anthracite, meanwhile, the dual effects of reducing ash content and separating maceral components are achieved, then grading treatment is conducted by means of the density and hardness difference of vitrinite and inertinite, small-particle-size vitrinite is further sufficiently enriched, and the carbon negative electrode material is obtained. The content of vitrinite in the auxiliary material B is larger than or equal to 96 wt%, and then the auxiliary material B is subjected to hot air oxidation treatment to be subjected to a cross-linking reaction, so that the auxiliary material B is promoted to form a hard-carbon-like structure in the high-temperature carbonization process; meanwhile, collecting a mixed material containing 50-70wt% of vitrinite and 30-40wt% of inertinite as a main material A, and graphitizing the main material A; the graphitized main material A, the oxidized auxiliary material B and a binder are heated, fused and carbonized to form a graphite / hard-like carbon hybrid structure, and the anthracite-based fast-charging carbon negative electrode material with excellent electrochemical performance is obtained.

The invention discloses an iron alloy electrode paste and a preparation process, and belongs to the technical field of electrode paste preparation, the iron alloy electrode paste comprises a composite aggregate system and a composite binder system, the composite aggregate system comprises the following components by mass: 40-60% of anthracite aggregate, 15-25% of artificial graphite flake, and 3-8% of silicon carbide whisker; the composite binder system comprises the following components in percentage by mass: 70-80% of medium-temperature modified coal pitch, 10-15% of furan resin and 5-10% of dispersion liquid containing nano boron carbide, and the composite binder system is combined with the composite aggregate system through a gradient permeation process to form a three-dimensional conductive network and an enhanced interface; the composite aggregate system and the composite binder system are optimally proportioned, and gradient permeation and gradient kneading processes are combined, so that the comprehensive performance of the electrode paste is remarkably improved, the thermal shock resistance is greatly improved and the linear shrinkage rate is reduced while low resistivity is maintained, the electrode paste is suitable for smelting ferroalloys such as silicomanganese and ferrochromium, and the service life is remarkably prolonged.

The invention discloses a high-antimony lead production process based on lead refining alkaline residues, and belongs to the technical field of lead bullion refining alkaline residues. Through carbonization treatment after urea intercalation and urea decomposition and escape, more pores and larger interlayer spacing are left, so that the specific surface area of anthracite is increased, porous anthracite is obtained, and the specific surface area of the anthracite is increased; the porous anthracite is subjected to secondary intercalation by using nano calcium oxide, the obtained modified porous anthracite is larger in interlayer spacing and larger in surface area, a large amount of nano calcium oxide is uniformly attached to the surface of the anthracite, the reaction activity is remarkably improved, and an enlarged pore structure is beneficial to gas diffusion, so that the reduction reaction efficiency of the anthracite is improved; the zeolite-based modified asphalt powder is used as a binder, and zeolite particles can fill micro pores and cracks in the asphalt, so that the void ratio is reduced, the compactness of the asphalt is improved, and the bonding strength is improved; the lead product prepared through the production technology is high in purity, the antimony recovery efficiency is high, meanwhile, the amount of generated slag is small, and the content of lead in the slag is low.

The invention discloses a high-aluminum limonite and specularite ore blending and sintering method which comprises the following steps: 1) preparing primary pre-blending powder: pre-blending high-aluminum limonite, specularite concentrate powder, iron oxide scale, limestone powder and anthracite powder to prepare the primary pre-blending powder with the water content of 6.5-7%; (2) preparing a uniformly mixed material: blending the primary pre-blended material powder obtained in the step (1) with high-silicon iron ore powder and hematite and limonite powder to prepare the uniformly mixed material; 3) sintering and burdening: burdening the uniformly mixed material obtained in the step 2) with limestone, dolomite powder, quicklime, solid fuel and return mine, and 4) controlling the components of the sintered ore as follows: 2.3-2.5% of Al2O3, 5.7-6.5% of SiO2, 8-8.5% of FeO and 1.85-2.5% of MgO. According to the invention, while 20-30% of the proportion of the discount ore silk road powder in the total uniformly mixed material is increased, the sintering cost is reduced by 20-42 yuan / ton, the drum strength of the sintered ore is greater than or equal to 78.5%, the return mine rate is less than or equal to 27%, and the RDI + 3.15 mm is greater than or equal to 63%.

The invention relates to a manufacturing method of a sodium ion battery negative electrode hard carbon material. According to the hard carbon, coal-based hard carbon prepared by taking anthracite as a raw material and carbon black particles in waste gas discharged by a diesel engine are used as carbon sources. And carrying out pre-oxidation pyrolysis and carbonization processes after acid pickling and purification to finally form the hard carbon composite material. The conductivity of the hard carbon material is greatly enhanced, more efficient charge transfer and ion conduction are realized, and the sodium storage capacity is also greatly improved. Finally, the hard carbon composite material has higher reversible capacity, coulombic efficiency and rate capability. In addition, due to the existence of more hydrophilic groups, the hydrophobicity of the hard carbon composite material is also greatly improved.

The application discloses a zinc extraction process from secondary zinc oxide, and belongs to the technical field of zinc oxide preparation. In the rotary kiln roasting, composite porous flaky reducing carbon with waste paper, rice husk and wooden chips as main raw materials is used as a reducing agent. Compared with the commercially available anthracite, the composite porous flaky reducing carbon has low cost, realizes resource recycling, and has a large specific surface area and porous properties. A multi-level structure of flaky layers and pores is constructed, so that the contact sites of the composite porous flaky reducing carbon and the secondary zinc oxide are increased. The porous structure can avoid the caking of the material layer caused by the stacking and agglomeration of the flaky layers, and avoid the obstruction of gas flow, so that the pain points of the traditional reducing agent, such as local agglomeration and insufficient contact, are solved. The surface of the composite porous flaky reducing carbon is deposited with calcium oxide. The presence of the calcium oxide can react with a small amount of sulfur elements generated in the rotary kiln roasting process of the composite porous flaky reducing carbon, so as to generate calcium sulfate and reduce the content of sulfur dioxide.

The present invention discloses a method for improving the combustion efficiency of pulverized coal with oxygen enrichment in a blast furnace, comprising the following steps: Step 1, prepare the raw materials charged into the blast furnace, the fuel charged into the furnace, and the injection materials. The raw materials charged into the furnace are sinter, pellet, and lump ore; the fuel charged into the furnace is large coke and coke breeze, and the pulverized coal injection material for the blast furnace is a mixed powder of bituminous coal + anthracite + blast furnace slag; Step 2, the blast furnace adopts a burden distribution mode of "restraining the peripheral gas flow + developing the central gas flow", and the mass percentage of the ore charged at the periphery is 33.3 - 35.7% of the ore batch; Step 3, the oxygen enrichment rate adopted by the blast furnace is 10 - 14%, and the air inlet area is adjusted according to the actual air volume of the blast furnace, with the actual wind speed being 285 - 300 m / s; Step 4, the blast furnace smelts with technical parameters of a hot blast temperature of 1250 - 1350 °C and a coal injection ratio of 190 - 220 kg / t·Fe, realizing the improvement of the combustion efficiency of pulverized coal with oxygen enrichment in the blast furnace. This method can increase the oxygen enrichment rate of the blast furnace blast, increase the output of the blast furnace, use a large proportion of high-volatile bituminous coal for injection, increase the coal ratio charged into the furnace, and reduce the coke consumption.

The invention discloses a hard carbon negative electrode material and a preparation method thereof, and belongs to the technical field of sodium ion batteries, the synthesis steps adopt a two-step plasma method, and the method comprises the following steps: step 1, taking biomass carbon, anthracite and metal salt as reactants, and carrying out ball milling on the mixture by adopting a plasma ball milling process; 2, the precursor obtained in the step 1 is subjected to plasma ball milling, the temperature in a plasma ball-milling cavity is heated to 200-400 DEG C in situ, and the particle size of the anthracite after ball milling is 2-15 microns; and step 3, performing high-temperature sintering in an inert atmosphere, soaking the obtained product in hydrochloric acid to remove impurities in ash, and then washing to be neutral to finally obtain the hard carbon negative electrode material. The hard carbon negative electrode material prepared by the invention shows high coulombic efficiency and specific capacity, good cycling stability and excellent rate capability.

The invention provides a high-capacity fast-filling graphite composite negative electrode material and a preparation method thereof, and the preparation method comprises the following steps: by taking anthracite and needle coke mixed micro powder as a raw material, pre-carbonizing the mixed raw material, and then physically activating by taking water vapor or carbon dioxide as an activating agent to prepare a porous carbon material with rich micropores and moderate specific surface area; a nitrogen-sulfur cocompound or copolymer is used as a doping agent, and the porous carbon material is doped under a hydrothermal reaction condition to prepare the nitrogen-sulfur co-doped porous carbon material. Performing low-temperature graphitization on the porous carbon under a nitrogen-sulfur co-doped catalytic condition to obtain a graphitized nitrogen-sulfur co-doped porous carbon material; then coating and forming the graphitized nitrogen-sulfur co-doped porous carbon material by taking an organic carbon source as a coating agent, an oxide with a perovskite structure as a catalyst and a lithium salt with high thermal stability as a pre-lithiation agent and adopting a kneading and compacting process; and carrying out high-temperature calcination, crushing and screening to prepare the high-capacity fast-charging graphite composite negative electrode material with the secondary particle structure.

The invention discloses a multi-dimensional evaluation method of a blast furnace process extreme energy efficiency technology, and relates to the field of steel production energy efficiency evaluation. Aiming at six extreme energy efficiency technologies of a blast furnace process, a'technical unit energy-saving cost (CCEa)-net present value (NPV)-internal return rate (IRR) 'ternary index system is constructed, an energy-saving supply curve and a cost-benefit analysis method are combined, and comprehensive evaluation is realized through four steps: calculating the energy-saving and emission-reducing potential when the blast furnace uses anthracite, and introducing exclusive emission factor correction; calculating the unit energy-saving cost considering the multi-pollutant synergistic benefit, and combining the exclusive reachable rate of the technology; the full-life-cycle cost effectiveness is analyzed from the perspective of enterprises, and technology maturity correction is introduced; and carrying out dynamic weighted sorting based on a TOPSIS method, and outputting technical priorities. The method breaks through the limitation of single-dimensional evaluation, realizes the collaborative evaluation of economic and environmental benefits, and provides a decision basis for the low-carbon transformation of the blast furnace.

The invention discloses an efficient carbon ash dissociation method for stone coal vanadium ore acid leaching vanadium tailings, which comprises the following steps: 1) pulping: mixing the stone coal vanadium ore acid leaching vanadium tailings, an additive and water for pulping to obtain mixed slurry; (2) the mixed slurry is subjected to ore grinding treatment, and ore grinding pulp is obtained; according to the method, the stone coal vanadium ore acid leaching vanadium tailings are subjected to ore grinding under the additive system with the specific combination and proportion, and the dissociation performance of the stone coal vanadium ore acid leaching vanadium tailings is synergistically improved; meanwhile, aiming at the characteristic that the coal surface of the stone coal is partially oxidized, a flotation reagent composed of a traditional collecting agent, composite oleic acid and octanol is adopted, the collecting capacity is effectively improved, the reagent is saved, higher carbon and ash flotation separation selectivity can be obtained, and obtained carbon-rich concentrate can be used as blending combustion coal; the obtained high-ash tailings can be used for preparing Portland cement, baking-free bricks and other building materials after being dehydrated, resource utilization of the stone coal vanadium ore acid leaching vanadium tailings is achieved, and the method has good application and popularization value.

This invention discloses an automatic weighing and mixing device and a fully automated caking index tester and its testing method. The automatic weighing and mixing device includes an anthracite weighing and feeding mechanism, a test coal weighing and feeding mechanism, and a crucible rotation and lifting mechanism. The anthracite weighing and feeding mechanism includes a first feeding and weighing mechanism and an anthracite feeding mechanism. The test coal weighing and feeding mechanism includes a second feeding and weighing mechanism and a test coal feeding mechanism. The crucible is located on the crucible rotation and lifting mechanism. The crucible rotation and lifting mechanism moves the crucible between the first feeding and weighing mechanism and the anthracite feeding mechanism to receive and weigh the anthracite. The crucible rotation and lifting mechanism also moves the crucible between the second feeding and weighing mechanism and the test coal feeding mechanism to receive and weigh the test coal. This invention achieves full automation of the testing process, has a simple structure, provides high accuracy in test results, and has high work efficiency.

The utility model discloses a sewage treatment multi -medium filter device relates to multi -medium filter device technical field, including filter box, the one side fixed connection of filter box has the water inlet pipe, the inside of filter box is provided with from top to bottom in proper order anthracite layer, quartz sand layer and garnet layer, the mechanism of washing and brushing, the mechanism of washing and brushing sets up on filter box, and the mechanism of washing and brushing is used for the cleaning of anthracite layer, quartz sand layer and garnet layer. The utility model discloses through the mechanism of washing and brushing can spray water and wash from below, drive cleaning brush body to brush and wash anthracite layer on the top simultaneously, make up the defect that top washing is not enough, make cleaning more sufficient and comprehensive, can utilize the loosening of the impurity that is jammed on the micropore on anthracite layer, quartz sand layer and garnet layer with the knocking vibration effect of vibration auxiliary mechanism, so that being washed and brushed off by water or brush body, further make cleaning more sufficient and comprehensive, reduce residual.

This invention provides a method for evaluating the cost-effectiveness of semi-coke based on the effective calorific value of pulverized coal, relating to the field of iron and steel metallurgy. First, a formula for calculating the effective calorific value of pulverized coal in a blast furnace is established. By calculating the heat released from incomplete combustion of carbon and deducting the heat absorbed by moisture decomposition, hydrocarbon cracking, ash slag formation, and desulfurization, an effective calorific value more consistent with the actual operating conditions of the blast furnace is obtained. Subsequently, this effective calorific value is divided by the injection cost to construct a cost-effectiveness index. By calculating and comparing the cost-effectiveness index of the target fuel combination after semi-coke partially replaces anthracite with the benchmark combination cost-effectiveness index, the economic viability of semi-coke substitution can be accurately determined, and the critical price or price range for cost-effective semi-coke can be directly calculated. This invention overcomes the shortcomings of traditional evaluation methods that are detached from the actual thermal environment of the blast furnace, providing a scientific and quantitative decision-making basis for fuel procurement and coal blending optimization.

The invention relates to the technical field of reduction furnaces, in particular to an efficient reduction furnace for solid waste smelting treatment, which comprises a mounting base, a reduction furnace body is arranged on the mounting base, a solid waste conveying mechanism for feeding is arranged on the mounting base, and a high-temperature reduction mechanism for improving reducing atmosphere is arranged in the reduction furnace body. A waste gas purification mechanism is arranged at the exhaust end of the reduction furnace body, the high-temperature reduction mechanism comprises a material distribution circular rail detachably installed in the reduction furnace body, a plurality of horizontal pipelines are arranged on the outer side of the material distribution circular rail in the circumferential direction in an array mode, and the horizontal pipelines extend out of the outer side of the reduction furnace body. By arranging the high-temperature reduction mechanism and utilizing mutual cooperation between the material distributing circular rail and the material blowing circular pipe, pulverized coal can uniformly fall downwards in a circular ring shape, and compared with the mode that anthracite is directly added into a hearth in the prior art, the contact rate between the pulverized coal and solid waste can be effectively increased, so that the direct recovery rate of metal is increased.

The invention relates to the technical field of sodium batteries, and discloses a coal-based composite sodium battery negative electrode material and a preparation method thereof.The preparation method comprises the following steps that S1, anthracite is subjected to supercritical CO2 treatment, and a treated body is obtained and mixed with nano antimony oxide; s2, heating the mixture to obtain coal-based graphite; s3, the coal-based graphite is treated through a Hummers method, and the composite material is obtained. According to the method, the pore structure of the anthracite is regulated and controlled in a supercritical CO2 mode, then the nano antimony oxide is doped into pores of the anthracite, the anthracite is charred during subsequent firing and can better wrap antimony, meanwhile, the pore structure and connectivity of the coal are improved by the supercritical CO2, and the volume expansion of the antimony oxide can be greatly relieved. After the treatment, the graphene / Sb composite material formed by oxidation reduction and ultrasonic exfoliation of the graphite can enable the combination of graphene and antimony to be tighter, so that the electrochemical performance is better.

The invention relates to the technical field of carbon material preparation, and provides a coal-derived carbon-based nickel diatomic catalyst, and a preparation method and application thereof. The preparation method comprises the following steps: S100, grinding, mixing and activating anthracite and potassium hydroxide to obtain a first material; s200, mixing the first material with an oxidizing agent, and heating and oxidizing to obtain a second material; s300, the second material is put into a soluble nickel salt solution to be soaked and stirred, and a third material is obtained; and S400, grinding and mixing the third material and a nitrogen-containing compound, carbonizing, and pickling to obtain the coal-derived carbon-based nickel diatomic catalyst. The coal-derived carbon-based nickel diatomic catalyst prepared by the method has good catalytic performance, the active site of the catalyst is Ni2-N6, the structure is stable, meanwhile, the generation energy barrier for generating a carboxyl intermediate can be effectively reduced, and the generation rate of carbon monoxide is increased.

The invention provides a coal dust deashing method, and belongs to the technical field of coal cleaning and processing. According to the method, the anthracite is subjected to first acidolysis by adopting hydrochloric acid, so that carbonate minerals and metal oxides such as Fe2O3 and CaO in the anthracite are directionally removed; then destroying a silicate crystal structure in the anthracite by adopting a hydrofluoric acid solution so as to deeply desiliconize; and finally, hydrochloric acid is adopted for second acidolysis, insoluble fluorides such as CaF2 generated in the hydrofluoric acid desiliconization stage are dissolved, efficient deashing of anthracite is achieved, and the ash content of finally obtained deashed coal is smaller than or equal to 0.2 wt%. The method has the advantages of extremely high anthracite ash removal efficiency and low cost, is suitable for efficiently cleaning anthracite to prepare subsequent products, and does not cause secondary pollution.

The invention relates to the technical field of lithium ion battery negative electrode material preparation, and discloses a graphitized anthracite-based negative electrode material grading method. The method comprises the following steps: (1) conveying a graphitized negative electrode material to a first-stage airflow classifier (4) for first-stage classification, and collecting a negative electrode material with a first granularity obtained after first-stage classification; and (2) conveying the negative electrode material with the particle size smaller than the first particle size obtained after primary classification to a secondary airflow classifier (12) for secondary classification, and collecting the negative electrode material with the second particle size obtained after secondary classification. According to the method disclosed by the invention, the graphitized anthracite-based negative electrode material is crushed and graded as required by adopting a mode of combining superfine mechanical crushing and multi-stage airflow classification.

The invention discloses coal water slurry prepared from epoxy resin wastewater and a preparation method and application of the coal water slurry, and the coal water slurry comprises the following components in parts by weight: 225-600 parts of mixed coal; 150 to 400 parts of epoxy resin wastewater; 0.1 to 10 parts of an additive; the mixed coal is composed of bituminous coal and anthracite, and the weight ratio of the bituminous coal to the anthracite is (1-5): (1-5). The epoxy resin wastewater is used for replacing fresh water, anthracite and bituminous coal are mixed, the prepared coal water slurry has no corrosion to a rod mill and is good in slurrying property and high in ash fusion point, the water-cooled wall gasification furnace is used for gasifying the coal water slurry, the gasification reaction temperature is high, oxygen consumption is low, the carbon conversion rate is high, the COD content of external gasification sewage of the gasification furnace and the sewage discharge amount are low, and the coal water slurry can be recycled. The method has the advantages of realization of the resource utilization of the epoxy resin wastewater, improvement of the adaptive capacity of coal types, no environmental pollution, environmental protection, and generation of important economic values and social benefits.

The invention discloses a method for blocking the long range of anthracite-based hard carbon microcrystals by using mechanical ball milling, which comprises the following steps: 1, under the protection of inert atmosphere, heating anthracite powder which is crushed and screened to a target particle size to a target temperature, and pre-carbonizing to obtain a carbonized material with an initial microcrystal structure; 2, taking the carbonized material with the initial microcrystal structure as a raw material, and breaking long-range carbon microcrystals in the carbonized material through a mechanical ball milling process to obtain a carbonized precursor formed by stacking small-size aromatic carbon clusters; 3, sequentially carrying out acid pickling treatment and water washing treatment on the carbonized precursor, and then carrying out drying treatment; and 4, under the protection of inert atmosphere, carrying out high-temperature carbonization treatment on the dried product to obtain the anthracite-based hard carbon with short-range ordered carbon microcrystals. According to the invention, the anthracite which is wide in source and low in cost is directly used as a raw material, and the directional construction of short-range ordered microcrystals in the hard carbon negative electrode and the remarkable improvement of the rate capability of the battery can be realized through a simple mechanical ball-milling process capable of realizing large-scale production.

The invention relates to the technical field of coal conveying, in particular to a blanking device and unblocking structure for anthracite conveying, which comprises a belt conveying frame, a weight detection component mounted on the belt conveying frame, and a blanking hopper arranged above the end part of the belt conveying frame, a rotating baffle, a material distributing plate, a center stacking assembly and a pressing assembly are arranged in the falling hopper. When the center stacking assembly is used, coal can be conveyed to the middle of the conveying belt, the weights of the two sides of the conveying belt can be kept consistent, and discharging and conveying are stable. Through the arrangement of the pressing assembly, coal is prevented from leaking into the belt conveying frame from a gap between the belt conveying frame and the conveying belt through vibration, dust dissipation generated by vibration during conveying is reduced, and the service life of the discharging device is prolonged; and the crushing assembly and the vibration motor are arranged, so that the automatic unblocking effect can be achieved, the impact of coal on the conveying belt can be reduced through the crushing assembly and the material distributing plate, and the conveying belt is protected.

The present invention relates to the technical field of reduction furnaces, and in particular to a high-efficiency reduction furnace for solid waste smelting and treatment, comprising a mounting base, a reduction furnace body being provided on the mounting base, a solid waste feeding mechanism for feeding materials being provided on the mounting base, a high-temperature reduction mechanism for improving the reducing atmosphere being provided inside the reduction furnace body, an exhaust end of the reduction furnace body being provided with an exhaust gas purification mechanism, and the high-temperature reduction mechanism comprising a material dividing circular rail detachably mounted inside the reduction furnace body, a plurality of horizontal pipes being arranged in an array along the circumferential direction on the outer side of the material dividing circular rail, and the horizontal pipes extending outward from the outer side of the reduction furnace body. The present invention, by providing a high-temperature reduction mechanism and utilizing the mutual cooperation between the material dividing circular rail and the blowing circular pipe, can cause pulverized coal to fall downward uniformly in the form of a circular ring. Compared with the method of directly adding anthracite into the furnace in the prior art, the contact rate between pulverized coal and solid waste can be effectively increased, thereby increasing the direct recovery rate of metal.

The invention discloses a method for producing a high-phosphorus-content calcium magnesium phosphate fertilizer by using an industrial byproduct magnesium ammonium phosphate, which comprises the following steps: drying and screening magnesium ammonium phosphate, adding phosphorite, dolomite or serpentine and coke or anthracite, feeding the materials into a smelting furnace according to a ratio, melting and smelting at a high temperature, blowing air or oxygen by an air blower at the smelting temperature of 1400-1600 DEG C for 2-3 hours, and cooling to room temperature to obtain the high-phosphorus-content calcium magnesium phosphate fertilizer. The smelting time is 0.5-4 hours, discharging molten slag from a slag opening of the smelting furnace, and carrying out water quenching to obtain the calcium magnesium phosphate fertilizer; gas generated in the process enters a hot-blast stove along with smelting furnace gas, at the moment, the temperature of a hearth of the hot-blast stove reaches 900-1000 DEG C due to gas combustion, and ammonia reacts with nitrogen oxide in the tail gas to obtain nitrogen and water, and reacts with sulfur dioxide to finally obtain ammonium bisulfate. According to the invention, resource utilization of the industrial byproduct magnesium ammonium phosphate can be realized, the calcium magnesium phosphate fertilizer with high phosphorus content can be obtained, and nitrogen oxides and sulfur dioxide in the tail gas in the production process of the calcium magnesium phosphate fertilizer can be more effectively removed.

This invention discloses a method for combined ash reduction in the beneficiation and metallurgy of high-ash anthracite. Based on the dispersal characteristics of high-ash anthracite, a crushing-grinding-multi-stage flotation-alkali leaching process is designed, improving the flotation reagent regime. Simultaneously, a highly efficient combined collector is designed specifically for high-ash anthracite, enhancing the ash reduction effect of the process. Furthermore, this invention proposes an alkaline leaching treatment for the middlings obtained from flotation, improving the overall recovery rate of the coal preparation process. The low-ash anthracite product obtained by this method achieves a yield of over 56%, with ash content reduced to below 10%, and an overall recovery rate of over 84%, meeting the technical requirements for low-ash products. Moreover, this method requires only conventional mineral processing equipment, has a simple process flow, and is easily scalable for large-scale industrial production.

The invention discloses a preparation method of an anthracite-based graphite negative electrode material, which comprises the following steps: placing anthracite in a reaction furnace, vacuumizing twice, introducing nitrogen, keeping the nitrogen atmosphere, heating to 350-450 DEG C, then switching to hydrogen, keeping the temperature for 4-12 hours in the hydrogen atmosphere, and finally switching to nitrogen for natural cooling to obtain pretreated anthracite; and mixing the pretreated anthracite with 1-3wt% of a catalyst, and carrying out a high-temperature catalytic graphitization reaction to obtain the anthracite-based graphite negative electrode material. The anthracite is pretreated, so that the crosslinking effect of oxygen and sulfur in the anthracite on a carbon layer is effectively avoided, and the breakage of a side chain in the anthracite is promoted, so that residual carbon is more likely to be represented as pure side-chain-free aromatic hydrocarbon, and the internal structure of the anthracite is more easily and directionally arranged under the action of a catalyst; pores are formed in the surfaces of anthracite particles, so that permeation of the catalyst in the anthracite is enhanced, the catalytic effect is enhanced, and the catalytic graphitization effect is improved while the dosage of the catalyst is reduced.

The utility model discloses an integrated water purifier for surface water treatment, which comprises a water purifier, the water purifier comprises a water purification tank, a reactor is arranged on the water purification tank, a filter tank is fixedly arranged in the water purification tank, a honeycomb filler layer is arranged at the top of the filter tank, the filter tank is communicated with the reactor, and an anthracite filter layer and a quartz sand filter layer are arranged at the bottom of the water purification tank. A back flushing pipe is arranged below the quartz sand filter layer, one side of the back flushing pipe is communicated with a water outlet pipe and a driving pipe, the driving pipe is provided with a flow rate adjusting device and a water pump, sewage in the reactor reacts with a flocculating agent and then enters the filter box, and large particles in the sewage enter the filter box under the action of the honeycomb filler layer. Filtered water is further filtered by the quartz sand filter layer and the anthracite filter layer and then is discharged through the backwashing pipe and the water outlet pipe, siphon backwashing is changed into a water pump, backwashing strength is high, backwashing is thorough and clean, and the filter effect is good.

The present invention discloses a high-capacity coated composite graphite material for lithium-ion batteries and a preparation method thereof. High-quality anthracite is selected and pulverized to obtain fine anthracite powder as coating material A; natural graphite is selected as matrix material B; asphalt, resin, and tar are used as coating agent C. First, A and C are mixed and heated to fuse until uniformly dispersed; then B is added in batches while controlling the fusion temperature curve and dispersion frequency to obtain a composite graphite precursor. After shaping, pre-carbonization, graphitization, sieving, and demagnetization of the composite graphite precursor, the coated composite graphite material is obtained. The present invention selects high-quality fine anthracite powder, with low material cost. Combining the material characteristics of artificial graphite and natural graphite, it effectively controls the construction of a composite graphite coating structure with natural graphite as the matrix and anthracite particles and a carbon coating layer covering the surface, effectively improving the lithium storage capacity of the material and the compatibility between the material and the electrolyte, and developing a high-capacity and cycle-stable coated composite graphite material.

The present invention discloses a hard carbon negative electrode material and a preparation method thereof, which belongs to the technical field of sodium ion batteries. The synthesis step adopts a two-step plasma method, step 1: using biomass carbon, anthracite and metal salt as reactants, the mixture is ball-milled by a plasma ball milling process. Step 2: The precursor obtained in step 1 is subjected to plasma ball milling, and the temperature in the plasma ball ink chamber is in situ heated to 200-400°C. The particle size of the anthracite after ball milling is 2-15μm; step 3: high-temperature sintering is performed under an inert atmosphere, and the obtained product is soaked in hydrochloric acid to remove impurities in the ash, and then washed with water to neutrality, and finally a hard carbon negative electrode material is obtained. The hard carbon negative electrode material prepared by the present invention exhibits high coulombic efficiency and specific capacity, good cycle stability and excellent rate performance.

This invention relates to the field of power engineering control technology, and in particular to an intelligent coal blending system and method. It includes: a coal type identification unit for identifying the type of coal supplied to the coal mill; wherein the supplied coal types include lignite, bituminous coal, and anthracite; a unit calculation unit for real-time acquisition of the calorific value K and sulfur content I of the coal; and an intelligent blending unit for real-time adjustment and control of the amount of bituminous coal in the coal mill's supplied coal types based on the calorific value K and the sulfur content I. This invention, through intelligent, automated, and real-time adjustment and control of the amount of bituminous coal in the blended coal, and by using the calorific value and sulfur content as parameters for adaptive correction, effectively improves the complete combustion of coal to achieve the required energy supply and reduces pollution generated by coal combustion.