115 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 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.

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 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 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 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 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.

The invention belongs to the technical field of ultra-pure coal preparation, and particularly discloses a method for preparing ultra-pure coal based on low-ash bituminous coal, aiming at low-metamorphic bituminous coal with low ash content, the ash content of the prepared ultra-pure coal is reduced to 0.5 wt% or below by adopting a multi-stage flotation method and cooperating with interval type ore grinding, the whole preparation method is simple in process and high in preparation efficiency, and the method is suitable for industrial production. The ultra-pure coal can be conveniently and quickly prepared, and the high-value utilization of the coal is favorably improved.

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.

This invention relates to the field of coal dry distillation and coking technology, and particularly to a method for determining the coking capacity of coal based on plastic mass characteristic parameters. The method includes steps S1: collecting a coal sample and heating it at a first heating rate; step S2: heating the coal sample at a second heating rate while the current dry distillation process is in the second stage; step S3: in the second stage, analyzing the synchronicity between the maximum plastic mass thickness and the maximum volatile matter release rate, and determining whether to reduce the second heating rate based on the analysis results and the expansion coefficient; step S4: in the third stage, calculating the coking capacity coefficient based on the amount of plastic mass generated, the softening temperature range, and the maximum plasticity value. This invention intelligently monitors the dry distillation process of bituminous coal, combines actual data for feedback adjustments, and further optimizes the coking process. By considering the synchronicity between the maximum plastic mass thickness and the maximum volatile matter release rate, the heating rate is optimized to achieve a stable improvement in coke quality.

The present application belongs to the technical field of flue gas treatment, and specifically provides a preparation method of non-tar active coke, comprising the following steps: (1) adding phenolic resin powder, carboxymethyl cellulose powder and short glass fiber into pitch in a stirring state to obtain a mixture; (2) mixing bituminous coal and active coke grinding waste coke powder to obtain coal powder; (3) putting the coal powder into a kneader and starting stirring, adding the mixture into the kneader, then adding a Tween aqueous solution, and performing kneading to obtain a kneaded material; (4) granulating and drying the kneaded material, and then performing carbonization and activation to obtain the non-tar active coke. The preparation method uses waste coke under the vibrating screen of the regeneration tower of a desulfurization and denitrification system as the main raw material, and replaces part of the coal to reduce the preparation cost of the active coke. And a step-by-step mixing method is adopted, and a series of high molecular organic materials with different functions are matched to replace tar and improve the environmental friendliness of the preparation process.

The invention discloses a staged combustion dry method cement production process, and relates to the field of cement production. Comprising the following steps: raw material pretreatment: respectively crushing limestone, a high-silicon raw material, construction waste, an iron raw material and bituminous coal, and then mixing and homogenizing in a homogenizing stacking shed; staged combustion and clinker firing, wherein the mixed and homogenized raw materials are placed in a rotary kiln to be subjected to staged combustion to generate clinker; cooling the clinker, namely rapidly cooling the clinker discharged from the kiln through a grate cooler; cement grinding: mixing the clinker with gypsum and fly ash, and then grinding to obtain a finished product cement; the ground cement enters a bulk material bin to be stored or is packaged into bags through a packaging machine, and the raw materials comprise, by mass, 70-80 parts of limestone, 5-10 parts of a high-silicon raw material, 10-15 parts of construction waste, 5-10 parts of an iron raw material and 3-5 parts of bituminous coal. NOx generation is reduced through a staged combustion technology, and collaborative optimization of production and environmental protection is achieved in combination with a multi-stage denitration and denitrification agent adding system.

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 utility model relates to the technical field of cement firing, in particular to a cement kiln capable of realizing mixed combustion of waste tire powder and low-heating-value bituminous coal, which comprises a base, a cement kiln main body is mounted on the left side of the top of the base, the top of the cement kiln main body is communicated with a smoke exhaust pipe, and the top of the smoke exhaust pipe is communicated with a smoke guide pipe. And a dust removal assembly is arranged in an inner cavity of the smoke guide pipe. According to the base, cement is fired through mixed combustion of waste tire powder and low-heating-value bituminous coal, waste gas generated in the firing process flows into the smoke guide pipe through the smoke exhaust pipe, the waste gas is introduced into the filter shell through the smoke guide pipe, impurities in the waste gas are filtered out through the filter plate, and the filtered impurities fall into the storage box to be collected under the action of gravity; after long-time use, much dust is attached to the inner wall of the smoke guide pipe, and a transmission shaft of a motor drives a rotating rod, a first belt pulley, a second belt pulley and a driving belt to rotate.

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.