54results about How to "Low ash" patented technology

The invention provides a lignite-based supercapacitor activated carbon electrode material and a preparation method thereof, and belongs to the technical field of electrochemical power supply material preparation. The preparation method comprises the following steps: S1, performing hydrochloric acid pickling on lignite raw coal powder for X2 hours, performing hydrofluoric acid pickling for X2 hours, and heating a calcium phosphate solution for deoxidation to obtain pretreated lignite; s2, uniformly stirring and mixing the pretreated lignite, an alkaline activator and deionized water according to the mass ratio of 1: X4: (5-10) to obtain a mixture; s3, activation is conducted, the activation temperature is X1 DEG C, and the activation time is X3 h; cooling to obtain a roasted product; s4, acid pickling with diluted hydrochloric acid; the specific capacitance of the active carbon electrode material is Y F / g, wherein Y = a + b * X1 + c * X2 + d * X3 + e * X4-f * X1 * X2 + g * X1 * X3 + h * X1 * X4 + i * X2 * X3 + j * X2 * X4 + k * X3 * X4-l * X12-m * X22-n * X32-o * X42. The preparation method is simple, the cost is low, the process repeatability is good, the prepared porous carbon has a high specific surface area, and the power density and the cycling stability of the supercapacitor are improved.

The invention relates to a post-treatment method of a vinyl polymer and the vinyl polymer obtained by the method. According to the post-treatment method disclosed by the invention, the post-treatment method comprising a washing step and an adsorption step is adopted, so that the ash content in the vinyl polymer can be effectively reduced in a simple manner.

The invention relates to the field of coal dressing flotation reagents, and discloses a green coal dressing flotation reagent and a preparation method and application thereof. The invention provides a green coal dressing flotation reagent which is composed of 70-80 parts of methyl oleate, 15-30 parts of methyl palmitate and 3-6 parts of an emulsifying agent (sorbitan oleate Span80). The preparation method comprises the following steps: firstly, weighing raw materials, magnetically stirring methyl oleate and methyl palmitate for 30 minutes, then mixing with sorbitan oleate (Span80), and heating and stirring in a water bath at 55 DEG C for 2 hours to obtain the medicament. In the application of coal slime flotation, the reagent solution is added into ore pulp and matched with a foaming agent, and flotation clean coal is formed by utilizing bubbles to carry coal slime particles. A plurality of groups of experiments show that the agent is excellent in performance, the clean coal recovery rate can reach 79.66%, the ash content is as low as 10.91%, the agent dosage is remarkably reduced compared with a traditional collecting agent, meanwhile, raw materials are green and environmentally friendly, the coal dressing industry is effectively promoted to develop towards the efficient and green direction, and the agent has extremely high application value.

The present application discloses a method for preparing a carbon material for a battery, comprising: filtering and concentrating papermaking black liquor to obtain liquid lignin; polymerization: adding a cross-linking agent to the liquid lignin for cross-linking and curing reaction to obtain a lignin polymer solid; pre-oxidation: pre-oxidizing the lignin polymer solid to obtain a lignin-based resin; pre-carbonization: pre-carbonizing the lignin-based resin in a non-oxidizing gas atmosphere to obtain a carbon material precursor 1; gas phase deashing: gas phase deashing the carbon material precursor 1 in a non-oxidizing gas atmosphere under the action of a halogen compound and / or a halogen element to obtain a carbon material precursor 2; calcination: crushing the carbon material precursor 2 and calcining it in a protective atmosphere to obtain a carbon material for a battery. The method of the present application effectively improves the expansion and foaming phenomenon during lignin carbonization, and the obtained carbon material has low ash content, controllable specific surface area, and excellent electrochemical performance. A lignin-based resin as mentioned above is also disclosed.

The present invention relates to a conductive silver paste for automotive coated glass and a preparation method thereof, belonging to the technical field of functional glass. The conductive silver paste comprises the following components and weight contents: 50-80% of flaky mixed silver powder; 5-10% of spherical silver powder; 2-10% of organic resin; 8-45% of organic solvent; and 0.5-2% of organic additive. The preparation method comprises: firstly mixing the organic resin with the organic solvent to obtain an organic carrier; then mixing and dispersing the flaky mixed silver powder, the spherical silver powder, the organic additive, and the organic carrier to obtain the conductive silver paste. Compared with the prior art, the present invention effectively solves the problems of low resistance, adhesion, wide sintering window, and bonding strength between the silver paste and the copper foil.

The invention belongs to the technical field of semiconductor graphite materials, and particularly relates to a semiconductor graphite material and a preparation method thereof. The semiconductor graphite material comprises the following raw materials in percentage by mass: 23-33% of pitch coke powder, 23-33% of green petroleum coke powder, 5-15% of artificial graphite powder, 3-8% of natural graphite powder and the balance of modified pitch. The semiconductor graphite material disclosed by the invention has relatively high breaking strength, compressive strength, hardness and density; the prepared ceramic has low resistivity, porosity and ash content, the preparation process is simpler, and the production cost is reduced.

The invention relates to the technical field of refined cotton processing, in particular to an efficient and optimized refined cotton processing production method which comprises the following production steps: S1, preparing materials: selecting cotton linters as raw materials; s2, cotton opening is conducted, cotton linters are placed on a feeding port of a cotton opener, and equipment is started for cotton opening treatment; s3, preparation of a cooking agent: taking quinone and 2-methylquinone as assistants, putting the assistants into sodium hydroxide, sodium carbonate and amino acid salt, and mixing and stirring to prepare the cooking agent; and S4, cooking treatment: putting the cotton linters into the prepared cooking agent, cooking, and reacting sodium hydroxide with cellulose. By regulating and controlling the biological thallus glycolysis process, directional control over the polymerization degree of the product is achieved, the range of the polymerization degree is narrowed, the fiber reaction uniformity is improved, the fluctuation range of the polymerization degree of products of the same specification is smaller than 80, the impurity removal efficiency is improved, the content of impurities, ash and metal ions is reduced, efficient impurity removal and refining are achieved, and the quality of processed refined cotton is improved.

The invention discloses a resin-based hard carbon composite material and application thereof in button type half-cell preparation. The method comprises the following steps: melting phenol, and adding a formaldehyde solution to prepare a mixed solution A; dispersing the carbon nano tube powder and hexadecyl trimethyl ammonium bromide in pure water, and grinding to obtain carbon nano tube dispersed slurry B; and adding the carbon nanotube dispersion slurry B into the mixed solution A to obtain a mixed solution C, adjusting the pH value to prepare a phenolic resin precursor solution, carrying out cross-linking curing to prepare a phenolic resin cured precursor, carrying out mechanical grinding, and putting the phenolic resin cured precursor into a tubular furnace to finally prepare the resin-based hard carbon composite material. Conductive carbon is introduced to the condensation polymerization end of phenol and formaldehyde, a communicated conductive network is formed in the composite material by regulating and controlling the material composition, the electron transmission distance between particles is shortened, the intrinsic conductivity of original resin carbon is improved, and the composite material has the advantages of high capacity, high first efficiency, high magnification and low ash content; wide application prospects are realized in the field of lithium ion battery negative electrode materials.

The invention discloses a preparation method and application of a resin-based hard carbon composite material, the preparation method comprises the following steps: melting phenol, adding a formaldehyde solution, adding carbon nanotube powder, and adjusting the pH value to 8-10 by using triethylamine to prepare a phenolic resin precursor solution; carrying out cross-linking curing reaction on the phenolic resin precursor solution to obtain a phenolic resin cured precursor; and mechanically grinding the phenolic resin curing precursor, and putting the phenolic resin curing precursor into a tubular furnace to finally prepare the resin-based hard carbon composite material with the conductivity of more than 30S / cm. Conductive carbon is introduced to the condensation polymerization end of phenol and formaldehyde, a communicated conductive network is formed in the composite material by regulating and controlling the material composition, the electron transmission distance between particles is shortened, the intrinsic conductivity of original resin carbon is improved, and the composite material has the advantages of high capacity, high first efficiency, high magnification and low ash content; wide application prospects are realized in the field of lithium ion battery negative electrode materials.

The invention provides a method and a system for continuously extracting and washing a crude benzomelamine product. The method comprises the following steps: mixing a crude product solid of benzotripolycyanamide with water to prepare slurry capable of continuously flowing, and continuously feeding in a fluid form; enabling the slurry to be in countercurrent contact with washing water in the turntable extraction tower so as to realize continuous extraction and washing of the crude product of the benzotripolycyanamide; meanwhile, the spiral conveyor is additionally arranged at the bottom of the turntable extraction tower, so that washed benzotripolycyanamide solids can be conveniently settled to the lower part of the turntable extraction tower so as to realize continuous discharging and further to be dried. Compared with traditional intermittent cross-flow washing, the method has the advantages that continuous extraction and washing of crude benzomelamine product solids can be achieved, washing efficiency is improved, washing water is saved, impurities such as benzamide and potassium hydroxide remaining in benzomelamine can be efficiently removed, the ash content and the free alkali content of the product are reduced, and the method is suitable for industrial production. And the purity of the benzotripolycyanamide product is improved.

The invention belongs to the technical field of plant active ingredient extraction, and relates to a segmented enzymolysis-cascade membrane separation extraction method of cyclocarya paliurus combined-state selenium polysaccharide and the combined-state selenium polysaccharide prepared by the method. The method comprises the following steps: firstly, constructing a first extraction system for a cyclocarya paliurus leaf raw material, carrying out first-stage enzymolysis, inactivation and solid-liquid separation, separating a first liquid phase through a nanofiltration membrane to form a low-molecular selenium-containing component flow, and excluding the low-molecular selenium-containing component flow in a subsequent alcohol precipitation and recovery step; and constructing a second extraction system from the first solid phase, carrying out second-stage enzymolysis, inactivation and solid-liquid separation, sequentially carrying out microfiltration, first ultrafiltration, second ultrafiltration and nanofiltration washing on the second liquid phase, and carrying out ethanol precipitation to obtain the combined-state selenium polysaccharide. The proportion of target molecular weight interval components in the obtained product is increased, the mass fraction of polysaccharide is increased, and the proportion of inorganic selenium, the mass fraction of protein and the ash content are reduced.

The invention relates to soluble chitin extracted from natural traditional Chinese medicine maggot and a preparation method thereof.The soluble chitin is obtained by extracting chitin of maggot powder through an alkaline method and then conducting modification through a modifying agent, the modifying agent is selected from one or more of 1, 2-epoxypropane and ethylene oxide, and the modifying agent is selected from one or more of 1, 2-epoxypropane and ethylene oxide. The mass / mol ratio of the maggot powder to the modifier is 1g: (0.05-0.2 mol). Compared with the prior art, the chitin extraction rate is high, the chitin is modified to be water-soluble, and the use occasion of the chitin is greatly improved.

The present invention is a method for preparing activated carbon and liquid fertilizer by biomass pyrolysis based on the combined action of biomass vinegar liquid and biomass oil. The method stirs and mixes the crushed biomass with the vinegar liquid obtained by pyrolysis and filters it through a filter, obtains a liquid phase and sends it to a chelating tank to add N / P / K chelation to obtain liquid fertilizer; the solid phase biomass obtained by filtration is sent to a closed heating container and heated to 270-280°C and kept constant at 1-1.5, and then sent to a pyrolysis furnace for pyrolysis, and the gas phase is obtained after pyrolysis. After condensation and centrifugal separation of vinegar liquid and biomass oil, the gas phase is obtained for pyrolysis, and after a certain proportion of biochar and biomass oil is ultrasonically separated, it is sent to an activation furnace for activation to obtain high-quality, high-yield activated carbon. The present invention uses the combined action of vinegar liquid and biomass oil produced by pyrolysis to solve the problems of high cost, pollution, low quality and low yield of activated carbon made from biochar in traditional biomass quality improvement methods, and finally obtains high-quality activated carbon and liquid fertilizer.

The application discloses a method for preparing direct reduced iron from iron-containing raw materials with near-zero carbon, and belongs to the technical field of steel metallurgy. The method comprises the following steps: uniformly mixing iron-containing raw materials, an organic-inorganic composite binder, biomass carbon and water, and then sequentially performing high-pressure forming and drying and solidification to obtain cold briquetting; and the cold briquetting is reduced by pure hydrogen to obtain direct reduced iron. The method can prepare cold briquetting suitable for the performance requirements of a shaft furnace for direct reduction at a relatively low temperature (<300 DEG C), and further prepares direct reduced iron by pure hydrogen reduction. The method has a short process flow, near-zero carbon emission, and provides a new technical route for the green and low-carbon transformation of the steel industry.

The utility model discloses a kind of perforating device of bundled straw biomass fuel, including frame, and frame is provided with perforating device, and perforating device includes linear power mechanism, mounting seat and punch assembly, the end surface of mounting seat is connected with linear power mechanism, and the other end surface is provided with punch assembly;The bottom of frame is provided with the positioning assembly for positioning straw bundle, and linear power mechanism drives punch assembly to carry out punching operation to the straw bundle after positioning. Linear power mechanism includes any one in hydraulic cylinder, cylinder, electric cylinder, and hydraulic cylinder is connected with hydraulic pump group and control valve group, cylinder is equipped with gas source equipment and solenoid valve, electric cylinder is electrically connected with servo driver and controller. The utility model punches in straw bundle, obtains straw bundle with air hole, increases airflow flow in straw bundle, effectively improves the combustion efficiency of whole straw bundle, can effectively reduce the volume and structure of combustion furnace, reduces combustion furnace investment cost.

The invention provides a carbon anode plate for fluorine preparation and a preparation method and application thereof, and belongs to the technical field of carbon anode plates. Eutectic prepared from aluminum fluoride, calcium fluoride and lithium fluoride is mixed with carbon nanotube / carbon black aggregate particles, needle coke and medium-temperature coal pitch, a carbon anode plate is prepared through a conventional carbon plate manufacturing process, carbon chemical vapor deposition and copper electroplating are performed on the surface, and the carbon anode plate for fluorine preparation is prepared. The preparation method of the carbon anode plate for fluorine preparation is simple, the generation of polarization of the carbon anode plate is prevented, and the carbon anode plate has the advantages of low porosity, low ash content, high mechanical strength, high volume density, obviously prolonged service life, low resistivity and the like, and has a wide application prospect.

The utility model provides a device for generating coke breeze for blast furnace injection by pyrolyzing feed coal, which comprises a feeding unit, a pyrolyzing and separating unit, a heat carrier heating unit and a blast furnace injection separating unit which are sequentially connected, the pyrolysis and separation unit is divided into a pyrolysis reaction area and a gas-solid separation area, a solid outlet of the gas-solid separation area is connected with the heat carrier heating unit, an upper outlet of the heat carrier heating unit is connected with the blast furnace injection separation unit, and the blast furnace injection separation unit is used for extracting coke breeze for blast furnace injection. Through the arrangement of the washing and grinding device, the granularity of feed coal is controlled, the ash content in the feed coal is reduced, coke breeze is heated after pyrolytic reaction, the ash content of the coke breeze is reduced, and the granularity of the coke breeze is controlled through separation, so that the coke breeze can meet the use requirements of blast furnace injection materials, and the utilization value of low-rank coal and coke breeze products is improved; the device is simple in structure, easy and convenient to operate, low in cost, high in economic benefit and wide in application range.

The invention discloses natural neohesperidin and a separation and purification method thereof, and belongs to the technical field of natural product extraction.The high-purity neohesperidin is prepared from immature bitter oranges through smashing, extraction, coarse crystallization, organic solvent pulping, water pulping and recrystallization. The problems of complex process, long production period, high equipment requirement, high comprehensive production cost, high product ash content and the like in the existing neohesperidin separation and purification process are solved.

The invention belongs to the technical field of feed, and particularly relates to a production method of corn steep liquor fermented protein and the corn steep liquor fermented protein.The production method comprises the steps that corn steep liquor is sterilized, and the sterilized corn steep liquor is obtained; inoculating a leavening agent into the sterilized corn steep liquor, and carrying out aerobic fermentation to obtain corn steep liquor fermentation liquor; the corn steep liquor fermentation liquor is subjected to an air floatation method to obtain an air floatation liquid and fermentation protein mixture; carrying out cation removal on the air floatation liquid to obtain cation precipitate and supernate; mixing the supernate and the fermented protein mixture, and drying to obtain corn steep liquor fermented protein; compared with corn steep liquor dry powder obtained by directly drying corn steep liquor, the corn steep liquor fermented protein obtained by the invention has the advantages that toxin contained in the corn steep liquor fermented protein is reduced, the caking problem can be effectively solved, and the ash content is reduced.

This invention discloses a rapid deep peak-shaving system and method for co-firing biomass in a coal-fired circulating fluidized bed, belonging to the field of fuel combustion technology. This invention controls in-furnace combustion by adjusting the biomass co-firing ratio and feeding position, thereby improving the response rate under varying loads. It utilizes a bed material storage and conveying system to recycle the bed material in the furnace, recover the sensible heat of high-temperature ash slag, and control the material concentration and circulation loop stability during load changes. Furthermore, this invention introduces heated, clean, low-oxygen flue gas into the furnace, suppressing the formation of excessive nitrogen oxides and facilitating bed temperature stability during rapid load changes.

This invention discloses a cerium sulfosalicylate sulfonate for use as a coal combustion catalyst, its preparation method, the catalyst itself, and its applications. The preparation method includes: S10, mixing cerium nitrate and sulfosalicylic acid dihydrate with water to obtain a cerium sulfosalicylate complex solution; S20, adding the cerium sulfosalicylate complex solution to a first reverse micelle solution to obtain a first mixed solution, then adding n-butanol in batches to obtain a first microemulsion; S30, adding ammonia to a second reverse micelle solution, then adding n-butanol in batches to obtain a second microemulsion; S40, mixing the first and second microemulsions and stirring to obtain a pale blue, opalescent colloidal solution, thus obtaining a second mixed solution; S50, drying and grinding the second mixed solution to obtain cerium sulfosalicylate. This cerium sulfosalicylate coal combustion catalyst is easily dispersed and can catalyze the pyrolysis and oxidation processes of coal from within, improving the utilization rate and calorific value of coal.

The invention relates to the technical field of solid biomass waste recycling and biomass activated carbon preparation, in particular to a perovskite active agent loaded coconut shell activated carbon composite material and a preparation method and application thereof. The preparation method of the perovskite active agent loaded coconut shell activated carbon composite material comprises the following steps: preparing coconut shell activated carbon by taking coconut shell as a raw material; laCo (1-x) MnxO3 is prepared, the molar ratio of lanthanum to cobalt to manganese is 1: (1-x): x, and x is 0-1; and loading LaCo < 1-x > Mn < x > O < 3 > on the coconut shell activated carbon to obtain the perovskite active agent loaded coconut shell activated carbon composite material. According to the preparation method, the problems that in the prior art, extra electrification is needed for electrolysis, the raw material proportion requirement is high, the proportion is complex, and the method is not suitable for large-scale industrial production are solved, efficient absorption of the harmful dye malachite green in the printing and dyeing wastewater is achieved, and the preparation method has important research significance and environment-friendly application value.

The invention provides a preparation method of porous graphite and a material for preparing the porous graphite, the method comprises the following steps: adding modified water-soluble cellulose and a dispersing agent into deionized water, and uniformly stirring to obtain a resin base solution; the viscosity of the resin base solution is 110 to 140 cps; adding polystyrene microspheres into the resin base solution, and fully stirring to obtain a mixed solution; pouring the mixed solution into a mold, then putting the mold into a drying oven, drying at 90-120 DEG C, and removing the mold to obtain resin; placing the resin in a carbonization furnace, carrying out carbonization treatment in a protective atmosphere, and naturally cooling to normal temperature to obtain a porous graphite base material; repeatedly dipping and carbonizing the porous graphite base material by using the resin base solution until the preset density is reached, so as to obtain a densified base material; and placing the densified base material in a high-temperature furnace, and carrying out graphitization treatment at 2500-2600 DEG C to obtain the porous graphite.

The invention discloses a preparation method and application of a biomass hard carbon material and a precursor thereof, and belongs to the technical field of preparation of electrode materials for sodium ion batteries. The preparation method of the precursor of the biomass hard carbon material comprises the following steps: steam carbonization and steam explosion; for the steam carbonization, crushed biomass powder is put into a steam explosion kettle at room temperature, the kettle cover is closed, and steam is introduced to start steam carbonization; for the steam explosion, after the steam carbonization is completed, the temperature in the steam explosion kettle is kept unchanged, the pressure is released, and then the material in the steam explosion kettle is taken out and dried to obtain the precursor of the biomass hard carbon material; the preparation method of the biomass hard carbon material comprises the following steps: crushing, high-temperature carbonization, and coating carbonization; the preparation method of the invention can solve the technical problems that the yield of biomass hard carbon materials is difficult to improve, the pore structure is difficult to control, and the purity needs to be improved.

The present invention provides a method for co-producing ethanol and L-arabinose using corn bran, the method comprising pretreatment, enzymolysis, fermentation, alcohol distillation, decolorization, ion exchange, concentration, and crystallization. The present invention obtains alcohol and L-arabinose by processing corn bran, which can further improve the utilization value of corn bran and increase the income. In addition, the obtained alcohol can be used as a clean fuel, which meets the needs of environmental protection, and L-arabinose has a broad market as a health functional sugar; the method of the present invention, relative to the dry basis of corn bran, the alcohol yield reaches 22-23%, and the L-arabinose yield is 15.5-16%.

The invention discloses a lubricating oil composition with low friction and high extreme pressure properties and application of the lubricating oil composition. The lubricating oil composition is characterized by comprising lubricating base oil, ZDDP, carboxylic acid end group beta-diketone and aromatic ester, the viscosity grade of the lubricating base oil is between SAE 20 and SAE 50, and the lubricating base oil accounts for 90-98% of the total mass of the lubricating oil composition; the mass ratio of the ZDDP to the carboxylic acid-terminated beta-diketone to the aromatic ester is 1: (1-2): (1-4), and the total mass of the three is 2-10% of the total mass of the lubricating oil composition; the molecular structure of the beta-diketone is redesigned, the molecular polarity of the beta-diketone is adjusted to increase the chemical adsorption capacity of the beta-diketone, and meanwhile, the adaptability of the beta-diketone in the lubricating base oil is improved by using the aromatic ester, so that the lubricating oil can have excellent properties of low friction and high extreme pressure.

The present invention provides a swirl burner head, comprising a central cavity; an intermediate cylinder is sleeved on the central cavity; an outer cylinder is sleeved on the intermediate cylinder; an inner cylinder is connected to the end of the central cavity in the outer cylinder; a sleeve is provided on the inner cylinder surface inside the outer cylinder; an L-shaped ring plate connected to the central cavity, the outer cylinder and the intermediate cylinder is sleeved on the sleeve; a flange plate is provided at the end of the outer cylinder; the outer cylinder, the L-shaped ring plate, the central cavity, the sleeve and the flange blockage form a swirl chamber; the swirl chamber is connected to the inner cylinder through a swirl tube; the swirl chamber is connected to the central cavity through a second swirl plate; the outer cylinder, the intermediate cylinder and the L-shaped ring plate form a second swirl chamber; a swirl plate is provided between the outer cylinder and the intermediate cylinder; an air duct is connected to the outer cylinder; a partition is provided in the air duct; the partition divides the air duct into a first air duct and a second air duct; the first air duct is connected to the second swirl chamber; the second air duct is connected to the swirl chamber; regulating valves are provided in the first air duct and the second air duct, and the combustion effect is guaranteed by the three swirl winds of the burner head, thereby improving the combustion effect of the fuel.

This invention belongs to the field of battery manufacturing technology, specifically relating to a wood-based hard carbon anode material, its preparation method, and its application in sodium-ion batteries. Addressing the high cost of hard carbon material precursors, this invention proposes a method for preparing a wood-based hard carbon anode material, comprising: using natural wood particles as a carbon source precursor, first subjecting them to hydrothermal treatment in a strong acid solution containing hydrogen peroxide, followed by high-temperature carbonization to obtain the wood-based hard carbon anode material. This invention uses natural wood as a raw material, eliminating the need for pore-blocking agents, and thus forming a wood-based hard carbon anode material with a closed-cell structure, providing a better environment for sodium ion insertion and extraction.

The utility model discloses single crystal furnace main heater calcining equipment which comprises an equipment base, a side plate is integrally formed on the side of the equipment base, a top plate is integrally formed at the upper end of the side plate, six groups of main heaters are positioned in the equipment base, and a device seat is positioned at the bottoms of the main heaters. An observation window is formed in the edge side of the side plate, high-temperature-resistant glass is positioned on the inner side of the observation window, codes are arranged on the equipment base, and a heater supporting mechanism is fixed to the position, where the main heater is positioned, of the equipment base. According to the single crystal furnace main heater calcining equipment, six main heaters can be calcined at the same time, the use effect of the heaters can be verified in time by calcining in advance, the heating state, hot resistance, cold resistance and the like of the heaters can be monitored in time, the state of the heaters can be monitored in real time, the ash content of graphite pieces can be reduced, and the service life of the heaters is prolonged. And therefore, the blow-in ignition probability is greatly reduced.