149 results about "Bituminous coal" 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 relates to a method for preparing a hard carbon material from carbon dot heterogeneous cross-linked bituminous coal, a coal-based hard carbon material and application. The preparation method comprises the following steps: (1) soaking pretreated bituminous coal in an acid solution, washing to be neutral, and drying to obtain dry pulverized coal; (2) dispersing the carbon dots in an alcohol solvent for ultrasonic treatment to obtain a dispersion liquid; (3) mixing the dried pulverized coal obtained in the step (1) and the dispersion liquid obtained in the step (2), mechanically stirring, and drying to obtain a mixture; (4) performing low-temperature heating crosslinking on the mixture obtained in the step (3) in an oxygen-containing atmosphere so as to obtain a heterogeneous crosslinking product; and (5) performing high-temperature carbonization on the heterogeneous cross-linked product in an inert atmosphere to obtain the coal-based hard carbon material. The coal-based hard carbon material can be used as a sodium ion battery / potassium ion battery negative electrode, and has excellent sodium / potassium storage performance.

The invention belongs to the technical field of sodium ion batteries, and particularly relates to a bituminous coal-based hard carbon negative electrode material based on oxygen treatment, a preparation method and application. The oxygen-containing functional group is introduced into the bituminous coal material, so that the electron transmission performance and the ion diffusion rate of the bituminous coal material are optimized, and the sodium storage performance and the first coulombic efficiency of the bituminous coal-based carbon material are remarkably improved. The invention provides an effective and practical strategy, converts low-cost bituminous coal into the high-grade hard carbon negative electrode of the sodium ion battery, and is suitable for popularization and application.

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.

The present invention provides a black polyimide film manufactured by imidizing a polyamic acid obtained from a dianhydride monomer and a diamine monomer, the black polyimide film comprising a black pigment containing bituminous coal and perylene black.

The invention discloses mixed pulverized coal for blast furnace injection, and relates to the technical field of steel smelting. The blast furnace injection mixed pulverized coal comprises the following components in parts by mass: 30-55 parts of bituminous coal, 40-65 parts of anthracite and 0.5-3 parts of a combustion improver, wherein the combustion improver comprises an iron-based MOF material and / or an iron-based MOF material derivative. Under the synergistic effect of the bituminous coal, the anthracite and the combustion improver, the ignition temperature of the mixed pulverized coal can be remarkably reduced, and the combustion efficiency is improved.

The invention relates to a sample micro-weighing device and method for bituminous coal caking index measurement and industrial analysis. The sample micro-weighing device comprises a horizontal guide rail, a vertical guide rail, a cantilever support, a standard sample micro-weighing device, a to-be-measured sample micro-weighing device, an analytical balance, a sample bottle, a crucible and a control system. The vertical guide rail can move along the horizontal guide rail, and the to-be-measured sample micro-weighing device is movably connected with the vertical guide rail through a rotating device; and the standard sample micro-weighing device is movably connected with the vertical guide rail through a cantilever bracket. The device and the method are mainly used for measuring the caking index of bituminous coal according to a GB / T 5447 Bituminous Coal Bituminous Index Measurement Method and carrying out coal sample industrial analysis according to a GB / T 212 Air Dried Coal Sample Ash Measurement, can realize trace weighing of the sample, can realize weighing of the whole sample, can execute uniform mixing operation before weighing, and can be used for measuring the caking index of the bituminous coal according to the GB / T 5447 Bituminous Coal Bituminous Index Measurement Method. And the problem of sample segregation easily caused by conventional weighing and sampling is effectively avoided.

The invention discloses a method for preparing a raw material of a hard carbon negative electrode material from bituminous coal, which comprises the following steps: by taking the bituminous coal as a main raw material, removing ash substances in the bituminous coal through the processes of crushing, alkaline leaching, alkaline leaching activation, centrifugal washing and acid leaching to prepare the raw material of the hard carbon negative electrode material. And the produced deashing liquid is subjected to silicon precipitation and aluminum precipitation processes to realize separation of silicon and aluminum and recycling of alkali liquor. According to the method, high-value utilization of the bituminous coal in the field of preparation of the sodium-ion battery hard carbon negative electrode material is realized, meanwhile, separation and extraction of valuable components such as silicon and aluminum are realized, a direction is found for high-value resource utilization of the bituminous coal, and meanwhile, conditions are created for low-cost preparation of the sodium-ion battery negative electrode material. The method has the characteristics of comprehensive utilization of valuable components, low cost and the like.

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 relates to the technical field of coal chemical industry, in particular to a big data-based bituminous coal Aoya dilatation degree monitoring system and method. The method comprises the following steps: acquiring Aoya expansion degree data of current bituminous coal in a temperature rise process; clustering the Audible dilatation degree data by adopting an MST clustering algorithm to obtain a plurality of clusters; and performing anomaly detection on the plurality of clusters to obtain abnormal data in the corresponding clusters. According to the method, the Aoya dilatation degree data in the bituminous coal heating process is analyzed, and the analysis result is introduced into the outlier detection algorithm to monitor the bituminous coal data, so that the accuracy of monitoring the Aoya dilatation degree data of the current bituminous coal is improved.

The invention discloses a low-dimensional coal-based hard carbon material with high sodium storage capacity and high initial coulombic efficiency and a preparation method of the low-dimensional coal-based hard carbon material, and belongs to the technical field of alkali metal ion battery negative electrode materials. According to the method, Xinjiang bituminous coal is subjected to liquid-phase oxidation depolymerization, and oxidized coal nanosheets and oxidized coal-based graphene quantum dots are obtained; the preparation method comprises the following steps: carrying out crosslinking, self-assembly and deoxidation reduction on a mixture of coal oxide nanosheets and coal oxide-based graphene quantum dots or the coal oxide nanosheets through an amine-containing compound to obtain a low-dimensional coal-based precursor; in the high-temperature calcination stage, a graphite plate is used for assisting pyrolysis of the low-dimensional coal-based precursor, and a series of low-dimensional coal-based hard carbon materials are prepared. The low-dimensional coal-based hard carbon material serving as a sodium ion battery negative electrode has high sodium storage capacity and high initial coulombic efficiency (ICE), the specific capacity under the current density of 0.02 A g <-1 > can reach 420.40 mA h g <-1 > to the maximum, and meanwhile, the low-dimensional coal-based hard carbon material has the high ICE of 91.97%.

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 utility model discloses a portable alarm detection device. The portable alarm detection device comprises a grab handle assembly, a smoke guide assembly and an air supply assembly. According to the portable alarm detection device, a smoke guide assembly is connected to the top end of a grab handle assembly, an air supply assembly is connected to the bottom end of the grab handle assembly, the grab handle assembly comprises a shell, a heat insulation layer is fixedly connected to the inner side of the shell, an iron pipe is fixedly connected to the inner side of the heat insulation layer, and a blocking net is fixedly connected to the bottom end of the iron pipe; the bituminous coal is reserved in the iron pipe due to the arrangement of the blocking net, the bituminous coal is arranged on the inner side of the iron pipe, the outer side of the shell is fixedly connected with a heat insulation sleeve, the whole device is composed of a grab handle assembly, a smoke guide assembly and an air supply assembly, the bituminous coal is combusted in the grab handle assembly, and smoke is guided to a smoke sensor needing to be detected through the smoke guide assembly. And the air supply assembly is matched to supply air to accelerate air circulation, so that the smoke sensor is effectively detected, the situation that the smoke sensor is damaged is avoided, and the damaged smoke sensor can be conveniently replaced in time.

The invention discloses columnar activated carbon for water surface floating oil treatment and a preparation method thereof, and relates to the technical field of adsorption material preparation, and the preparation method comprises the following steps: carrying out semi-coking treatment on bituminous coal as raw material coal, grinding the raw material coal subjected to semi-coking treatment into powder, taking 100 parts of coal powder, 35 parts of coal tar and 10 parts of water, uniformly mixing to prepare coal paste, carrying out compression stretching molding, and carrying out cold air drying under negative pressure to obtain the columnar activated carbon for water surface floating oil treatment. A dry forming material is prepared; and carbonizing at the temperature of 550-650 DEG C to obtain a carbonized material, and activating at the temperature of 880-960 DEG C for 4-6 hours to obtain the activated carbon. The preparation method is simple in preparation process, free of any auxiliary agent except a binder and easy to operate; the prepared activated carbon has high adsorption capacity, low water absorption rate and high floating rate, and can effectively adsorb floating oil on the water surface and float on the water surface.

The invention relates to the technical field of thermal power generation, and discloses an integrated system and method for a middle storage type hot air pulverized coal feeding meagre coal boiler, in the system, the output end of a bituminous coal pulverizing unit and the output end of a meagre coal pulverizing unit are correspondingly connected with the input end of a bituminous coal pulverized coal feeder and the input end of a meagre coal pulverized coal feeder respectively; the output ends of the bituminous coal powder feeder and the meagre coal powder feeder are respectively connected to the hearth; the bituminous coal powder feeder and the meagre coal powder feeder are respectively provided with a temperature control pipeline, one end of the air temperature control system is connected to the bituminous coal powder feeder through the temperature control pipeline, and the other end of the air temperature control system is connected to the meagre coal powder feeder through the temperature control pipeline. The air temperature control system is connected with the bituminous coal pulverized coal feeder and the meagre coal pulverized coal feeder through the temperature control pipeline, the temperature of hot air fed into the hearth can be accurately controlled according to different coal types and operation working conditions, the appropriate hot air temperature is beneficial to safe and stable ignition and combustion of pulverized coal of different coal qualities, the combustion process is optimized, the combustion efficiency is improved, and the energy consumption is reduced. And incomplete combustion loss is reduced.

The invention discloses a detection method for reducing a caking index measurement error of bituminous coal. The detection method is characterized by comprising the following steps: 1) weighing a sample; 2) stirring the sample; 3) pressurizing the sample; 4) burning and cooling the sample; and (5) rotating the sample into a drum, screening, weighing and calculating. The invention aims to provide the detection method for reducing the caking index measurement error of the bituminous coal, and in the measurement process, a mode of supplementing manual stirring and uniform mixing with mechanical automatic stirring is adopted, so that a more accurate and reliable measurement value is obtained.

The invention discloses a soft carbon coated sulfur-nitrogen co-doped coal-based hard carbon material and a preparation method thereof.The preparation method comprises the steps that firstly, bituminous coal powder and thiourea particles are dissolved in absolute ethyl alcohol, fully stirred and mixed to be uniform, and after drying, bituminous coal-thiourea mixed powder is prepared; carrying out primary carbonization treatment on the bituminous coal-thiourea mixed powder in an inert atmosphere to prepare a sulfur-nitrogen co-doped coal-based hard carbon material; and depositing asphalt on the surface of the sulfur and nitrogen co-doped coal-based hard carbon material, and carrying out secondary carbonization treatment on the product to prepare the soft carbon coated sulfur and nitrogen co-doped coal-based hard carbon material, a sodium ion battery based on the soft carbon coated sulfur-nitrogen co-doped coal-based hard carbon material has high sodium storage specific capacity and first coulombic efficiency and high potential platform area sodium storage capacity proportion.

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 belongs to the technical field of blast furnace smelting furnace charge preparation, and particularly relates to a method for generating metallized agglomerates through high-temperature reduction of biomass prepared in high-silicon iron ore, which comprises the following steps: S1) drying biomass, bituminous coal and high-silicon iron ore, then screening, and adding into a ball mill for uniform mixing; s2) pressing the uniformly mixed material by using a briquetting machine to form a cylindrical block mass; and S3) carrying out roasting reduction treatment on the block mass. The method has the advantages that the biomass is used as a part of reducing agent to replace traditional pulverized coal, so that the use of fossil fuel is reduced, the energy consumption is reduced, and the reduction of carbon emission is facilitated. According to the method, the reduction efficiency of the high-silicon iron ore is improved by accurately controlling the carbon-oxygen ratio and the biomass ratio. And reducing gas is rapidly generated in the pyrolysis process of the biomass, biomass charcoal is deposited on the surfaces of high-silicon iron ore particles and in pores, a coupling effect is formed, and low-temperature rapid reduction of iron oxide is promoted.

The invention relates to the technical field of coal dry distillation coking, in particular to a coal coking capability determination method based on colloid characteristic parameters. The method comprises the following steps: S1, collecting a coal sample, and heating the coal sample at a first heating rate; s2, when the current dry distillation process is a second stage, heating the coal sample at a second heating rate; s3, in the second stage, analyzing the synchronism of the maximum colloid thickness and the maximum volatile component release rate, and determining whether the second heating rate is reduced or not based on the analysis result and the expansion coefficient; and S4, in the third stage, calculating the coking capability coefficient based on the colloid generation amount, the softening temperature range and the maximum plasticity value. According to the invention, intelligent monitoring is carried out on the bituminous coal dry distillation process, feedback adjustment is carried out in combination with actual data so as to further optimize the coking process, synchronism of the maximum colloid thickness and the maximum volatile component release rate is considered, the heating rate is optimized, and stable improvement of coke quality is realized.

The utility model provides a device for recovering carbon dioxide from flue gas generated after oxygen-fuel combustion of a heating furnace. The device comprises an oxygen-fuel heating unit; the external exhaust flue gas pipeline and the circulating flue gas pipeline are connected with the total oxygen heating unit in parallel through a smoke guide machine; the oxygen-flue gas heat exchanger and the flue gas-bituminous coal water heat exchanger are sequentially connected with a flue gas discharge pipeline; the water washing tower is connected with the flue gas-heat medium water heat exchanger; the drying unit, the buffering unit and the carbon dioxide collecting unit are sequentially connected with the water washing tower. According to the device, flue gas is led out through a flue gas leading machine and divided into two paths, and one path is mixed with oxygen subjected to heat exchange through a circulating flue gas machine to serve as a combustion-supporting medium to enter a total-oxygen heating furnace; and the other path enters the flue gas-oxygen heat exchanger to exchange heat with external combustion-supporting oxygen of the device, then enters the flue gas-heating medium water heat exchanger to exchange heat with heating medium water and recover waste heat, and then enters the adsorption unit to reduce the water content in the flue gas and purify carbon dioxide in the flue gas after further reducing the discharge temperature and removing water-soluble impurities through the washing unit.

The invention relates to the technical field of coal processing, in particular to a method for removing sulfur, mercury and ash in bituminous coal by using chlorine salinized soil, which comprises the following steps of: 1, mixing the bituminous coal, the chlorine salinized soil and water in required amount to obtain a bituminous coal mixed solution; 2, carrying out electrolytic treatment on the bituminous coal mixed solution under ultrasonic and stirring conditions; and step 3, transferring the bituminous coal mixed solution subjected to electrolysis treatment into a flotation tank, and carrying out flotation to obtain the bituminous coal without sulfur, mercury and ash. The chlorine salinized soil acts on the bituminous coal, ultrasonic electrolysis and flotation assistance are combined, sulfur, mercury and ash in the bituminous coal are efficiently removed, the method is non-toxic, green and environmentally friendly, the reaction condition is mild, the reaction time is short, the process is simple, the method has popularization value, efficient conversion and clean utilization of coal are promoted, and meanwhile comprehensive utilization of the chlorine salinized soil is facilitated.

The invention relates to the technical field of metallurgical engineering, and discloses a mixed coal injection, coal gun and blowpipe improvement process, which comprises the following steps: S1, designing and optimizing a coal blending structure, selecting high-volatility bituminous coal and low-volatility coal to mix and inject pulverized coal, dynamically adjusting the proportion according to the coal quality characteristics, and controlling the volatile component range of the pulverized coal to be 20-25%; s2, process parameters are adjusted, the temperature range of gas entering a mill is 260-280 DEG C, in the step S1, the initial proportion is 40%-50% of high-volatility bituminous coal and 50%-60% of low-volatility coal, and the proportion of the low-volatility coal is adjusted to 35%-40% in stages. By optimizing the coal blending structure, flexibly adjusting the proportion of the high-volatility bituminous coal to the semi-coke powder and controlling process parameters, the combustion efficiency and the injection amount of the pulverized coal are effectively improved, it is ensured that the pulverized coal can be combusted and utilized more sufficiently in the injection process, and the production efficiency is substantially improved.

The invention provides a bituminous coal unit SCR denitration flow field partitioning system, and relates to the technical field of denitration, and the system comprises a combustion module, a nitrogen oxide detection module, a flue gas pipeline, a denitration tower, a reducing agent injection module, a catalyst layer, and a control module; the flue gas pipeline comprises a plurality of partition plates, and the area between every two adjacent partition plates is a partitioned flue; the reducing agent spraying module is arranged in the denitration tower and is positioned below an outlet of the partitioned flue; and the reducing agent spraying module is used for spraying a reducing agent to the catalyst layer, and the reducing agent reacts with nitric oxide output from the outlet of each partition flue. A plurality of partition plates are arranged in a flue gas pipeline, and a flue area is divided into a plurality of subarea flues; and the reducing agent injection system is adjusted according to the concentration data, so that effective denitration of the nitrogen oxide is realized, insufficient fusion of the nitrogen oxide and the reducing agent is avoided, and the denitration efficiency is improved.

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 application provides a method for directly reducing vanadium-titanium magnetite in a gas-based shaft furnace, and belongs to the technical field of metallurgical processes. The method comprises the following steps: mixing: uniformly mixing 10-15 parts by weight of pulverized bituminous coal, 80-85 parts by weight of iron vanadium-titanium magnetite powder, 5-10 parts by weight of a high-temperature accelerator and 8-12 parts by weight of hot water to obtain mixed materials; balling: balling the mixed materials to obtain briquettes, which do not need to be heated, dried or roasted; and reducing: directly reducing the briquettes in a gas-based shaft furnace to obtain finished vanadium-titanium DRI. The application uses 100% vanadium-titanium ore, adopts non-blast furnace technology and a gas-based shaft furnace direct reduction process, the carbon in the prepared bituminous coal and the hot water are subjected to a gasification reaction at high temperature to generate CO and H2 required by the reduced iron, the amount of reducing gas used is reduced, and the technical problem of unstable supply of reduced coke in the prior art for deeply reducing vanadium-titanium magnetite is fundamentally solved.

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.