64 results about "Bituminous coal" patented technology

The invention provides a bituminous coal caking index full-process detection system based on a mechanical arm and a use method thereof, which can realize the operation of the whole bituminous coal caking index detection process from blanking weighing to crucible testing and then cleaning and recycling through the mechanical arm, and can liberate laboratory technicians from a tedious, monotonous and harmful working environment. And intelligent, unmanned, specialized, technical and standardized caking index detection and inspection service is realized. The system comprises a blanking weighing module used for placing quantitative samples into a crucible; the bonding pre-treatment and post-treatment module is used for treating samples before and after coking; the high-temperature furnace module is used for performing high-temperature coking treatment on the sample; the mechanical arm is used for clamping a crucible or a crucible holder and circulating among the blanking weighing module, the bonding pretreatment and aftertreatment module, the high-temperature furnace module, the bonding rotary drum tester module, the cooling module and the cleaning module.

This invention relates to the field of coking coal blending control technology, and discloses a method for controlling the coking stabilization of bituminous coal and coking coal blends, comprising the following steps: obtaining the thermoplastic parameters, petrographic parameters, and moisture parameters of bituminous coal and coking coal in the current control batch; establishing a dual-coal plasticity synergistic stabilization window based on the thermoplastic parameters and petrographic parameters, and determining the target dry basis blending ratio within the dual-coal plasticity synergistic stabilization window; converting the target dry basis blending ratio into the actual wet basis feed rate based on the moisture parameter; obtaining the actual particle size distribution after crushing, and adjusting the crushing parameters and feed compensation correction when there is a particle size deviation; blending according to the corrected actual wet basis feed rate, and obtaining the thermoplastic verification parameters of the blended coal; when the blended coal deviates from the target verification range, identifying the cause of deviation as moisture deviation, particle size deviation, or coal quality deviation according to a preset order, and performing corresponding corrections.

The invention relates to the technical field of sodium ion battery negative electrode materials, in particular to a hard carbon negative electrode material as well as a preparation method and application of the hard carbon negative electrode material. And the compaction density, the first efficiency and the capacity of the hard carbon negative electrode material are obviously improved. In addition, the technological process is simple, the usage amount of highly corrosive reagents (such as HF and NaOH) is reduced, low-rank coal (such as lignite and bituminous coal) can be compatible, and the raw material cost is reduced.

The invention discloses a microemulsion collecting agent applying jatropha curcas oil to low-rank coal flotation and preparation and application of the microemulsion collecting agent, and belongs to the technical field of low-rank coal flotation, the microemulsion collecting agent is composed of jatropha curcas oil biodiesel, a surfactant, a cosurfactant and water, and the preparation method of the microemulsion collecting agent comprises the steps that 1, crude jatropha curcas oil and methyl alcohol are subjected to transesterification in the presence of a basic catalyst, the jatropha curcas oil biodiesel is obtained; (2) dissolving a surfactant in water to prepare a solution; (3) mixing the jatropha curcas oil biodiesel with a surfactant solution, adding a cosurfactant, and stirring at room temperature to form a microemulsion; and (4) the microemulsion is filtered, and the microemulsion collecting agent is obtained. The collecting agent solves the problems that a low-order bituminous coal flotation collecting agent is low in selectivity, poor in collecting performance, large in agent dosage, low in clean coal yield and high in ash content, and has good industrial application and popularization prospects.

The invention relates to the technical field of bituminous coal carbon content prediction, and discloses a bituminous coal coal quality industrial analysis-based unit calorific value carbon content prediction method, which comprises the following steps of 1, sampling a target coal type for industrial analysis, and detecting the total moisture Mt, the ash content Aar, the volatile component Var and the fixed carbon FCar content of the target coal type; measuring the calorific value of the sampled coal to obtain the lower calorific value Qnet, ar of the coal type; step 2, calculating a dry ash-free basis volatile component Vdaf and a lower calorific value Qnet, daf of the target coal type; 3, predicting the carbon content CQdaf of the dry ash-free basis unit calorific value of the target coal type; and step 4, calculating the unit calorific value carbon content CQar of the target coal type. According to the method, the unit calorific value carbon content of the bituminous coal can be accurately predicted, and coal purchase is guided; the coal carbon content is further calculated by using the unit calorific value carbon content calculated by the method, the prediction precision is very high, and the correlation coefficient can reach 1-10-10.

The present application relates to coal physicochemical detection technical field, especially to a kind of sample particle size correction method for bituminous coal caking index, including preparation n samples, in n samples, the proportion of each sample particle size 0.1mm~0.2mm coal sample is respectively marked as X1, X2, X3……X n , n samples are tested, the caking index of each sample is determined, the caking index of the sample is calculated, the linear equation=aX+b of n samples is established, the caking index of any proportion X between the high and low points X1~Xn of the linear relationship is calculated, and the caking index under the X proportion is taken as the final result; the present application can effectively eliminate the influence of the change of the proportion of coal sample with particle size of 0.1mm~0.2mm on the determination of caking index, effectively eliminate the measurement error of laboratory internal and interlaboratory, improve the precision and accuracy of bituminous coal caking index determination method.

The invention relates to a method for judging the proportioning accuracy of a coal blending process, which belongs to the technical field of blast furnace ironmaking, and comprises the following steps: sampling bituminous coal and anthracite delivered from a stockpiling site at multiple points every day, and testing the components as a first analysis sample and a second analysis sample; carrying out normality test on the first analysis sample and the second analysis sample to obtain a test result; when the first analysis sample or the second analysis sample is in non-normal distribution, determining that the quality of the bituminous coal or the anthracite fluctuates severely or has a phenomenon of warehousing and ex-warehouse mixing; performing multi-point sampling on the raw coal entering the coal mill every day, and testing components as a third analysis sample; and carrying out normality test on the third analysis sample, and when the third analysis sample is in non-normal distribution, determining that an obvious proportion fluctuation or single coal mixing phenomenon exists in the period of time. According to the method, the analysis sample is subjected to normality test, so that the matching accuracy of the coal blending process can be effectively verified, and effective early warning on the matching abnormal condition of the coal blending process is realized.

This invention belongs to the technical field of blast furnace pulverized coal injection equipment, particularly the safety injection component for high-volatile bituminous coal and the blast furnace pulverized coal injection equipment and its usage method. Addressing the problems of low combustion rate, substandard pulverized coal particle size, and susceptibility to moisture absorption during pulverized coal storage, this component features an insulation sleeve on the outer wall of the injection pipe, preheating the pulverized coal with blast furnace exhaust gas to reduce heating energy consumption and promote rapid ignition. A spiral plate inside the injection pipe enhances the mixing of pulverized coal and nitrogen, and an electric push rod at the top controls a bending plate to adjust the pulverized coal injection angle, strengthening airflow disturbance and increasing the contact area between pulverized coal and oxygen. The blast furnace pulverized coal injection equipment includes a grinding cylinder and a storage box. The grinding cylinder has a multi-stage grinding structure, with a rotating shaft driving a grinding wheel to perform primary and secondary grinding of the pulverized coal, ensuring uniform particle size. The storage box utilizes exhaust gas heat to dry the pulverized coal and suppress spontaneous combustion. By optimizing the preheating, grinding, injection, and storage processes, the equipment improves the pulverized coal combustion rate and utilization rate, ensuring production safety.

The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a method for preventing a cold pressing block from bursting and bonding in the carbonization process. The method comprises the following steps: mixing iron ore powder, bituminous coal, anthracite and an adhesive in proportion, heating, and carrying out cold press molding to prepare a cold press block; the method comprises the following steps: spraying a composite anti-sticking agent solution mainly comprising desulfurized gypsum and lignin on the surface of a cold-pressed block, sequentially heating in a nitrogen atmosphere, and carrying out multi-stage carbonization treatment to finally obtain a composite iron coke product. By optimizing the heating system and innovatively adopting the desulfurized gypsum-based composite anti-sticking agent, the problems of cracking and bonding of the cold-pressed block in the carbonization process are remarkably inhibited, the yield, the mechanical strength and the process efficiency are greatly improved, high-value utilization of industrial solid wastes is realized, and the method has the advantages that the raw materials are easy to obtain, the method is green and environment-friendly, the process is simple and convenient, and the like. And the practical application requirements of blast furnace ironmaking production are met.

The invention relates to an injection coal proportioning and utilization technology in the field of blast furnace ironmaking, and discloses injection coal and a coal blending method thereof. According to the method, the fixed carbon mass fraction of mixed pulverized coal is not lower than 74%, the sulfur mass fraction is not higher than 0.75%, and the dry basis high calorific value is not lower than 7600 kcal / kg as control indexes, high-sulfur injection coal, large bituminous coal and high-carbon fly ash are selected to prepare the pulverized coal, and matching is conducted within the range that the high-carbon fly ash mass fraction ranges from 1% to 2%, and the large bituminous coal mass fraction ranges from 11% to 18%. And the carbon content and the fineness of the high-carbon fly ash are controlled, so that the obtained mixed pulverized coal meets the requirements of blast furnace injection granularity and components. Compared with the prior art, the method has the advantages that the pulverized coal injection cost is reduced on the premise of ensuring smooth operation of the blast furnace and stable sulfur content of the molten iron, and stable resource utilization of the high-carbon fly ash is realized.

The present application relates to a kind of vacuum roasting coupling microbial upgrading no-bonding high-sulfur bituminous coal preparation silicon smelting reducing agent method, belong to industrial silicon smelting composite reducing agent technical field.The present application mixes even with bituminous coal powder and corn cob powder and obtains mixture A, hydrogen peroxide solution is added in mixture A and grinds and mixes evenly and obtains mixture B;Mixture B is placed in temperature 800~1200 ℃ under vacuum roasting 30~90min, with furnace cooling and obtains roasting mixture C;Deionized water, bacteria liquid and sodium silicate are added to roasting mixture C, and carry out microbial leaching at temperature 25~65 ℃ for 5~10h, and stratify after standing, remove supernatant;Repeat microbial leaching step until supernatant is neutral, solid-liquid separation, and solid drying obtains low-sulfur composite reducing agent.The low-sulfur composite reducing agent obtained by the present application reaches 91.2~93.7%, and the caking index is 28~53, and the reaction activation energy is 13.4~17.7KJ / mol, meet the requirements of industrial silicon composite reducing agent.

This application provides a method for preparing new blast furnace charge using sintered return ore, belonging to the field of iron and steel metallurgical technology. The method includes pre-treating sintered return ore, pulverized coal, and a binder by crushing, screening, and drying; wherein the pulverized coal includes bituminous coal and coke powder; uniformly mixing the pre-treated sintered return ore, bituminous coal, coke powder, and binder to obtain a mixture; heating and cold-pressing the mixture to prepare a cold-pressed billet; and carbonizing and cooling the cold-pressed billet to prepare a sintered return ore composite iron coke product. This method effectively solves the problem of inefficient and low-carbon utilization of sintered return ore. Furthermore, using sintered return ore to replace iron concentrate in the preparation of composite iron coke significantly reduces production costs while ensuring high reactivity, achieving a low-cost transformation.

The invention discloses a feeding device based on roadway coal mining, and relates to the technical field of roadway coal mine conveying, the feeding device comprises a feeding machine body, two protection plates are fixedly connected to the feeding machine body, a feeding hopper is fixedly connected between the two protection plates, and a protection mechanism is arranged above the feeding machine body; the protection mechanism is used for pushing materials to get close to the center of the feeding machine body conveying belt and comprises a material pushing plate slidably connected to one side of the protection plate. Through arrangement of the protection mechanism and cooperation of a material pushing plate, a supporting plate and a material blowing nozzle, the situation that crushed materials generated during material conveying are close to the edge of a conveying belt of the feeding machine body is effectively avoided, meanwhile, friction force generated during crushed material moving is effectively prevented, and the stability of the feeding machine body during conveying of soft coal with the medium coalification degree is guaranteed; the two kinds of particles can obtain matched driving energy, the friction force between the two kinds of particles and the feeding machine body is reduced, and meanwhile raising and diffusion of flying dust are limited to a certain degree in the pushing process.

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 invention discloses a primary air powder pipeline segmented electromagnetic heating system for deep peak regulation of an anthracite unit, which comprises an air pipe main body, the air pipe main body comprises an inner pipe and an outer pipe, the outer pipe is sleeved outside the inner pipe, and an interlayer is arranged between the inner pipe and the outer pipe; the electromagnetic heating system comprises a first electromagnetic coil and a second electromagnetic coil; the first electromagnetic coil and the second electromagnetic coil are both connected with the electric control system, and the electric control system is used for controlling the first electromagnetic coil and the second electromagnetic coil to be powered on alternately; the temperature monitoring system is mounted in the inner pipe; the terminal control system is used for integrally controlling the operation of the device; wherein a pressure relief hole is formed in the air pipe main body. According to the invention, two groups of electromagnetic coils which are arranged in sections are adopted for alternate heating and are matched with multi-point temperature monitoring along the way, so that accurate partitioned heat compensation of an air-powder mixture is realized, and the problem of low-load combustion delay caused by the characteristics of low volatile component and high ignition temperature of anthracite is solved.

This invention discloses a NOx control method for a chain grate rotary kiln based on multi-source fuel utilization. This method, targeting different levels of environmental warnings and ultra-low emission requirements, first establishes a solid fuel combustion characteristic database including anthracite, bituminous coal, and their blends based on industrial analysis, elemental analysis, and thermogravimetric experiments. Simultaneously, it employs CFD numerical simulation technology, coupling an Eulerian-Lagrange multiphase flow model and a P-1 radiation model, to analyze the flow field and NOx formation patterns under pulverized coal and natural gas co-firing conditions. Upon receiving control commands, it calculates the inlet concentration threshold based on the real-time efficiency of the denitrification system, intelligently recommends the optimal fuel ratio using the multi-source database, and outputs corresponding kiln tail temperature, combustion air volume, and raw material structure control parameters. This invention, through a dual approach of "experimentation + simulation," achieves the suppression of fuel-type and thermal NOx formation at the source, meeting differentiated environmental indicators while ensuring stable production.

The invention discloses a muffle furnace automatic sample feeding and discharging device and method for bituminous coal caking index determination, and relates to the technical field of muffle furnaces, and the muffle furnace automatic sample feeding and discharging device specifically comprises a bearing base body, a control module, a muffle furnace, a transferring unit, a temporary storage unit, a sample feeding and discharging execution unit and a cooling unit, during operation, the temperature needs to be increased to 850 + / -5 DEG C through initialization, heat preservation is carried out, the sample is conveyed to the execution unit through the conveying unit, the sample is precisely conveyed into the furnace through the execution unit for dry distillation, automatic sampling is carried out after dry distillation, natural air cooling is carried out firstly, then forced cooling is carried out, and circulation operation is carried out. The temperature fluctuation in the furnace can be controlled within a qualified range, the potential safety hazard of manual high-temperature operation is avoided, the accuracy and repeatability of detection data are guaranteed, and the large-scale detection efficiency is greatly improved.

This invention discloses a low-dimensional coal-based hard carbon material with both high sodium storage capacity and high initial coulombic efficiency (ICE), belonging to the technical field of alkali metal ion battery anode materials. The method involves liquid-phase oxidation and depolymerization of Xinjiang bituminous coal to obtain coal oxide nanosheets and coal oxide-based graphene quantum dots; crosslinking, self-assembly, and deoxygenation reduction of a mixture of coal oxide nanosheets and coal oxide-based graphene quantum dots, or coal oxide nanosheets, using amine-containing compounds to obtain a low-dimensional coal-based precursor; and then, during high-temperature calcination, using graphite plates to assist in the pyrolysis of the low-dimensional coal-based precursor to prepare a series of low-dimensional coal-based hard carbon materials. This low-dimensional coal-based hard carbon material, as an anode for sodium-ion batteries, exhibits both high sodium storage capacity and high initial coulombic efficiency (ICE), achieving a high efficiency of 0.02 A g. ‑1 The specific capacitance at the current density can reach up to 420.40 mA hg. ‑1 It also boasts a high ICE ratio of 91.97%.

This invention discloses a method for the resource utilization and coal blending combustion of steel rolling sludge. The method involves mixing bituminous coal A with steel rolling sludge to prepare a mixture; feeding the mixture into a hot air dryer to prepare a mixed fuel; calculating the contribution of the steel rolling sludge to the volatile matter, ash content, and carbon content of the mixed fuel according to simplified rules; blending the mixed fuel, bituminous coal B, and bituminous coal C according to a coal blending model to prepare a blended coal; determining the R90 fineness of the blended coal obtained by pulverizing it in a coal mill based on the volatile matter content; using the obtained blended coal as fuel in a pulverized coal boiler for power generation; and determining the technical parameters of the pulverized coal boiler based on the volatile matter content. This invention couples steel rolling sludge with a coal-fired boiler, utilizing the synergistic utilization of oil and iron oxides in the steel rolling sludge. The oil rapidly releases combustible gases in the early stages of combustion, shortening the ignition delay time and improving combustion efficiency. The iron oxides act as a catalyst, promoting the oxidation of carbon particles. This achieves the harmless disposal and energy utilization of industrial solid waste without reducing boiler efficiency.

The invention provides a calculation method for determining the economic oxygen enrichment rate of a blast furnace based on constant thermal parameters, and relates to the technical field of ferrous metallurgy. The method aims at solving the technical problem that the economic oxygen enrichment rate capable of guaranteeing the stability of the thermal regulation cannot be cooperatively determined when the proportion of the bituminous coal injected by the blast furnace is adjusted. The method comprises the following steps: determining a theoretical combustion temperature and a blast furnace heat loss value under a reference working condition as target constraint conditions; for different coal price differences and bituminous coal mixing proportions, performing iterative calculation by cooperatively adjusting the oxygen enrichment rate and the total coal injection ratio so as to solve operation parameters meeting the constraint conditions; and then the smelting cost per ton of iron under each working condition is calculated, and the oxygen enrichment rate corresponding to the lowest point of the cost is determined through optimization, namely the economic oxygen enrichment rate. The method can actively adapt to market price fluctuation, provides a scientific and quantitative decision basis for low-cost operation on the premise of guaranteeing stable operation of the blast furnace, and effectively improves the economic benefits of the blast furnace.

The invention discloses a zero-smoke combustion principle and method for bituminous coal, lignite, biomass fuel and polyolefin waste plastics. Carbon-based solids are matched with non-toxic and harmless auxiliary materials, are kept in a specific occurrence state and are hydraulically bonded into cylindrical fuel with specific ventilation holes, and the cylindrical fuel is longitudinally and transversely stacked in a medium, small and miniature stove kang stove adopting a heat-preservation and fire-resistant stove core; igniting the ignition agent formed by combining the mixed alcohol gel ignition paste or ignition cake and the straw charcoal grating from the upper part, and starting to combust orderly and fully; the vertical distribution of the temperature of the hearth in which a high-temperature area is above and a low-temperature area is below is quickly formed by long flame radiant heat, so that ignition coal and underlying coal are subjected to differential static combustion without blowing air and a high chimney; the environment-friendly and energy-saving effects of zero smoke, high sulfur fixation rate, high heating efficiency, low nitrogen oxide, particulate matters and volatile organic compounds in the whole process from the ignition moment, and direct discharge of tail gas as the cleanliness is comparable to that of natural gas combustors are achieved, and ash is used as an acid clay aggregate structure modifier.

This invention belongs to the field of boiler technology and provides a 232MW large-capacity circulating fluidized bed hot water boiler. It includes a high-energy ignition device, a fully membrane-walled isobaric air chamber, a primary air chamber, an air distribution plate, a coal feeding device at the furnace front, a boiler ash removal device, a secondary air box, a furnace, a high-temperature insulated separator, risers, a return feeder, a diverting flue, a tail-end vertical flue, an economizer, an air preheater, and a compartmented outlet flue. The high-temperature insulated separator is a fully downward-sloping, stepless insulated separator; the return feeder is a dual-path return structure; the tubes of the economizer and air preheater form the tail-end heating surface, which is a high-heat-exchange, self-cleaning ash-removing tube array. This invention features more stable combustion, higher separation efficiency, low flue gas resistance, reliable operation, and significant energy-saving and wear-reducing effects. It can burn various fuels such as bituminous coal, lignite, and low-quality coal, making it suitable for large-scale centralized heating projects in northern China.

The method for determining the maximum allowable temperature of the outlet of the double-inlet and double-outlet steel ball coal mill comprises the following steps: preparing a coal sample, and grinding an air-dry-based coal sample to the pulverized coal fineness R90,% of daily operation to serve as a detection coal sample; obtaining the air dry basis lower calorific value Qnet, ad of the detected coal sample; setting a test bed and operation condition requirements; carrying out a pulverized coal explosion performance test by changing the pulverized coal mass, and testing to obtain the pulverized coal explosion lower limit mass m0 (g); calculating a pulverized coal explosion lower limit mass concentration Kb (unit: kg / m < 3 >) and a pulverized coal explosion lower limit heat concentration EHLC; according to the coal powder explosion lower limit heat concentration EHLC or the coal powder explosion index Kd, the maximum allowable calculation temperature tM2j of an outlet of the coal mill is calculated; and finally determining the maximum allowable temperature tM2y of the outlet of the coal mill under the current pulverized coal fineness. The invention is suitable for anthracite, meagre coal, bituminous coal and lignite, and adopts a double-inlet and double-outlet steel ball milling direct-fired pulverizing system.

The invention relates to a hard carbon material and a preparation method and application thereof, and the preparation method of the hard carbon material comprises the following steps: mixing a first carbon source and a second carbon source, carrying out high-energy ball milling, and carbonizing to obtain the hard carbon material, the first carbon source comprises one of lignite, sub-bituminous coal, bituminous coal and anthracite; the second carbon source comprises an organic compound material; the first carbon source is different from the second carbon source. Compared with the prior art, the preparation method has the advantages that the process is simple and convenient, the cost is low, and the prepared hard carbon material also shows excellent reversible capacity and capacity retention ratio under high rate.

The utility model relates to bituminous coal caking index determination technical field, specifically disclose a kind of bituminous coal caking index determination pressure ware, including the base of coal sample placement, the side of base is equipped with vertical shaft, the upper end of vertical shaft is connected with weight block, the upper end of base is equipped with rotating shaft, the lower end of base is equipped with motor that drives rotating shaft rotation, the lateral wall of rotating shaft is equipped with guide plate, vertical shaft penetrates guide plate and is slidably matched with guide plate, the lateral wall of vertical shaft is equipped with support bar, the lateral wall of rotating shaft is connected with support plate by pin shaft, support plate one end is connected with pressure rod, the upper end of rotating shaft is connected with electric push rod that pushes pressure rod downward, support plate rotates and pushes support bar upward and lifts vertical shaft under the action of electric push rod;The utility model realizes to the circumferential direction of coal sample individual pressurization test, through multi-station automatic switching, the problem that current manual individual feeding test operation is complicated is solved, realizes continuous test, and efficiency is significantly improved.

The invention relates to the technical field of blast furnace coal injection, and discloses a method for improving blast furnace bituminous coal injection proportion, which comprises the steps of raw coal control, pulverized coal preparation system transformation, pulverized coal preparation control parameter improvement and blast furnace coal injection parameter improvement. By controlling the moisture of the raw coal to be within 15%, the problems that high-moisture pulverized coal cracking consumes a large amount of heat in a tuyere area, the pulverized coal combustion rate is interfered, and the blast furnace fuel ratio is affected are solved; by controlling the ignition point value of the soft coal raw coal to be greater than 320 DEG C and combining with oxygen content parameter control, safe pulverization is ensured; through the arrangement of the pulverized coal bunker, the belt conveyor and the powder mixing bunker, it is guaranteed that bituminous coal and anthracite in blast furnace coal injection mixed coal are fully mixed, and the composition proportion is regulated and controlled at any time; rapid combustion of the pulverized coal at the front end of the tuyere is promoted by adopting measures of large air volume (greater than or equal to 3300m < 3 > / min), high air temperature (greater than 1220 DEG C) and high oxygen enrichment rate (greater than 5%), and cracking heat consumption of the high volatile pulverized coal is compensated.

The invention discloses a preparation process of a coal-based high-micropore carbon electrode material and application of the coal-based high-micropore carbon electrode material in a supercapacitor, and relates to the technical field of energy storage electrode materials. According to the method, lignite or bituminous coal is subjected to solvent extraction at normal temperature and normal pressure, raffinate is subjected to hydrothermal pretreatment, and efficient activation is realized by adopting a gradient temperature control method of low-temperature pore channel pre-construction-high-temperature short-time etching. Comprising the following steps: performing solvent extraction on a coal sample at normal temperature and normal pressure; carrying out hydrothermal treatment on the extracted heavy component; mixing the hydrothermal product with a chemical activator according to a certain proportion, placing the mixture in a tubular furnace under a protective atmosphere, firstly heating to a primary activation temperature for activation, and then heating to a high activation temperature; and pickling, washing and drying the activated product to obtain the coal-based porous carbon material. The process is green, simple, efficient and energy-saving, and solves the problems of non-uniform contact of an activator, easy collapse of a pore structure, low graphitization degree and the like in a traditional activation method.

This invention discloses a production method for reducing the agglomeration of alkaline pellets during roasting. The method includes: mixing iron ore powder, limestone powder, and bentonite in a mixer; adding the mixture to a disc pelletizer and supplementing with water to produce pellets with an average particle size of 8-16 mm; feeding the pellets onto a chain grate-rotary kiln roasting equipment; preheating and roasting in the chain grate and high-temperature roasting in the rotary kiln; and cooling the pellets in an annular cooler to obtain the finished pellets. The method further includes: using bituminous coal for the second stage of preheating in the chain grate; and using two pulverized coal injection guns in the rotary kiln. The first pulverized coal injection gun is inserted into the center of the rotary kiln, injecting a mixture of 50% bituminous coal and 50% anthracite; and the second pulverized coal injection gun is inserted into the kiln head of the rotary kiln and supplements with an appropriate amount of 100% anthracite. This invention can effectively reduce the agglomeration of alkaline pellets during rotary kiln roasting, thereby reducing the manual cleaning burden of unclogging the strip screen and ensuring normal production.