217 results about "Carbon dust" patented technology

The invention discloses a carbon nano tube strengthening toughening silicon carbide ceramic. The ceramic is prepared from raw materials comprising silicon carbide powder, boron carbide micro powder, carbon dust, carbon nano tube, agglomerant and dispersing agent of which the weight ratio is 100:0.5-3:1.5-8:0.5-3:3-6:0.2-3.0. Hot pressed sintering or sintering-free process is adopted for preparation. A carbon nano tube strengthening hot pressed sintering silicon carbide material has the high flexural strength of 593MPa, weibull modulus achieves 14.7, reliability is substantially improved compared with general silicon carbide, excellent mechanical property of a carbon nano tube functions in the silicon carbide, and the prepared silicon carbide ceramic has excellent strengthening toughening performance.

The invention discloses a fuel cracking furnace containing a boiler, horizontal waste plastics and a waste tyre cracking furnace tail gas treatment system, wherein, fuel comprises solid fuel and gas fuel or liquid fuel. The tail gas treatment system comprises a carbon dust particle filtration system connected with the fuel cracking furnace, a gas-solid separation system connected with the carbon dust particle filtration system, a flue gas emission system connected with the gas-solid separation system, and a circulating water cooling system. Compared with the prior art, the tail gas treatment system is environmental-friendly and economical; the system has long service life and convenient and fast assembly and disassembly; and the system can reduce or eliminate carbon dust particles in tail gas, and the emission temperature is approximately identical with the atmospheric temperature.

The invention relates an approach to produce artificial pumice. It is burned by nether materials: inorganic material, sodium hydroxide, borax, Paris white, carbon dust and isinglass. Thereinto, inorganic material is selected from minerals or clay. It follows nether steps: mixing above materials in terms of given ratio, cracking blending to 60-200 items and loading into a module to bake.

The invention relates to an A1203-MgO-C unfired product with carbon wrapped by nano Al2O3-MgO film and a preparation method thereof. The product uses natural high alumina bauxite (AlOOH) and sintered periclase (MgO) as initial raw material and employs method of sol-gel technology, which comprises following steps, putting superfine high alumina bauxite, carbon dust, water and additive into high speed impact mixer, carrying out coating process so as to let the materials have strong impact and mix with each other to form high density composite sol suspension liquid of carbon and aluminium hydroxide, therefore Al(OH)3 is mightily adsorbed on the surface of carbon, then realizing workmanship of coating powdered carbon by aluminium hydroxide. During the wet-milled process of mixture, the magnesium oxide powder and the mixture water in the matrix powder have hydration reaction to produce magnesium hydroxide sol, and the magnesium hydroxide sol and the aluminium hydroxide sol have situ synthesis reaction to produce nanostructured matrix of carbon-aluminium spinel to prepare A1203-MgO-C unfired product of the invention.

The invention relates to a feeding device, in particular to an intermittent feeding device for carbon dust. The technical problems are solved with the intermittent feeding device. The intermittent feeding device comprises an installation plate, a box body, a driving mechanism, a discharging mechanism, a baffle and others; the box body is arranged on the right side of the front wall of the installation plate, the driving mechanism and the discharging mechanism are arranged on the left side of the front wall of the installation plate, the driving mechanism is located behind the discharging mechanism, a first connecting plate is arranged on the right side of the discharging mechanism, a first through hole is formed in the right side of the top of the box body, a discharging pipe is arranged at the bottom of the box body, a third through hole is formed in the upper portion of the left wall of the discharging pipe, and the baffle is arranged between the left wall and the right wall of the upper portion of the discharging pipe. The intermittent feeding device can achieve intermittent quantified feeding, the carbon dust can be prevented from blocking a discharging port and adhering to thedischarging pipe, the first connecting plate can intermittently control the carbon dust to flow into the discharging pipe with the discharging mechanism, and the device is high in practicability.

Color-coated activated carbon and method of preparation are disclosed in the product of application of a thin, continuous coating of an insoluble colorant-containing polymer emulsion on the material, without causing a reduction in adsorption capacity of the untreated activated carbon. In addition, the resultant avoidance of carbon dust leads to improved performance for contaminant removal.

The invention discloses a shading ring processing method and a shading ring. The method comprises the following steps that the shading ring is provided, the shading ring comprises a body, an anti-static coating and a through hole, the anti-static coating coats the body, the through hole is formed in the body, the body is made of plastic materials, and the anti-static coating is a carbon dust layer; the wall of the through hole is corroded through aqueous alkali to form a matte structure. According to the shading ring processing method and the shading ring, the shading ring is processed inside an ultrasonic generator through aqueous alkali so that the matte structure can be formed on the wall of the through hole of the shading ring, the poor phenomena of dazzling, halo, ghosting and the like caused by reflection of the wall of the through hole are avoided, and therefore the photographing effect is ensured and the photographing product quality is improved.

A method of inhibiting dissolution of a transition metal alloy anode (40) of an aluminium electrowinning cell comprises providing a barrier layer (11,20,50,50′) on a non-anodic structural cell material (15), such as carbon, and electrolysing alumina dissolved in a molten electrolyte (30). The non-anodic structural material is able to supply an oxidisable by-product to the electrolyte and/or is active for reducing electrolyte species exposed to the structural material into an oxidisable by-product, such as sodium metal or carbon dust. However, the barrier layer inhibits the presence in the molten electrolyte (30) of the oxidisable by-product that constitutes an agent for chemically reducing the anode's transition metal oxides and anodically evolved oxygen. This inhibits reduction of the anode's transition metal oxides by the oxidisable by-product and maintains the anodically evolved oxygen at a concentration such as to produce, at the alloy/oxide layer interface, stable and coherent transition metal oxides having a high level of oxidation. The barrier layer may comprise molten aluminium (20) and/or a layer of refractory hard material (11,50,50′).

The present invention discloses a high borosilicate glass clarifying agent belonging to the technical field of glass clarifying agents. The glass clarifying agent is a compound clarifying agent comprising following raw materials in mass ratio: sodium sulfate to cerium oxide to lanthanum oxide to stannic oxide to carbon dust to halides in a mass ratio of (0.6-6.0):(0.01-2.0):(0.01-0.5):(0.01-0.8):(0.01-2.0):(0.5-6.0). The present invention also discloses a preparation method and application of the high borosilicate glass clarifying agent. The high borosilicate glass clarifying agent can realize continuous clarifying action in different temperature stages to ensure that glass liquid can continue to discharge bubbles in the different temperature stages so as to obtain products with a relatively excellent clarifying effect, the condition that the number per square meter of the bubbles greater than 0.02mm is not more than 1 is detected, the clarifying agent is poisonless, harmless, safe, environmentally friendly, and good in clarifying effect. Glass prepared by using the clarifying agent is low in bubble residue, and high in quality.

The invention discloses a preparation method of high-porosity alumina porous ceramics, which belongs to the technical field of ceramic preparation. The preparation method comprises the steps of: adding a sintering auxiliary agent and an intensifier in form of xerogel; and subjecting alumina skeletal materials, carbon dust, an ethocel composite pore-forming agent, a zirconium xerogel intensifier and a magnesium xerogel sintering auxiliary agent, which serve as raw materials, to ball-milling mixing, compression molding and heat-insulating sintering, and then cooling the mixture to a room temperature to obtain alumina porous ceramics. The preparation method has the key point that on the basis of pore forming of the pore-forming agent, zirconium xerogel serving as the intensifier and magnesium xerogel serving as the sintering auxiliary agent are added to improve the porosity and strength of the alumina porous ceramics. The preparation method has a simple process and is convenient to operate; and the prepared high-porosity alumina porous ceramics contain two air holes of different sizes and maintain high bending strength.

A small-scale scrapped tire boiler system for heating a small-scale facility using heat generated by burning scrapped tires. The system includes a scrapped tire burner furnace, a heat exchanger for heating a cool heat transfer medium from the facility by the combustion gas from the furnace and supplying the heated medium to the facility, and an exhaust gas purifier for purifying sulfurous acid gas and carbon dust contained in exhaust gas. The purifier includes an exhaust gas tower having a vertical path to discharge the combustion gas, a water sprayer for spraying water from the upper side of the tower so that the sulfurous acid gas is made to melt to water and the carbon dust is made to adsorb to fall down, a neutralizer for precipitating sulfurous acid gas components into alkali salts in a sulfurous acid aqueous solution to thereby neutralize water, and a tank containing the solution and water. The precipitated alkali salts are removed from the bottom of the tank and the floating carbon dust is removed from the upper portion of the tank.

A method for avoidance of attrited carbon dust is disclosed to lead to improved canister performance in emission control. Product attrition by dusting of granular and shaped activated carbons is disclosed to be reduced significantly, or essentially eliminated, by the application of a thin, continuous polymer coating on the granular or shaped activated carbon, without a reduction in adsorption velocity or capacity of the activated carbon when used in automotive emission control canisters.

The invention discloses a dyestuff pollution magnetic adsorbing material. The dyestuff pollution magnetic adsorbing material is prepared from, by weight, 0.5-1 part of beta-hydroxyalkylamide, 17-20 parts of ferrous chloride, 20-25 parts of iron chloride hexahydrate, 0.7-1 part of 8-hydroxyquinoline, 3-4 parts of allylpolyethyleneglycol, 40-50 parts of oxide complex carbon dust, 1-2 parts of sucrose acetate isobutyrate, 4-6 parts of diatomaceous earth, 0.5-1 part of sodium carboxymethylcellulose, and 2-3 parts of barium stearate. The dyestuff pollution magnetic adsorbing material is high in stability, and not prone to degradation, can be adapted to multiple dyestuff pollution effluent environments, after dyestuff in dyestuff pollution effluent is adsorbed, magnetic separation recycle is easy to achieve, secondary pollution cannot be caused, and the adsorbent itself cannot result in problems like heavy metal pollution to the environment neither.

The invention discloses a boron carbide composite material and a preparation method thereof. The boron carbide composite material is characterized by being prepared from the following components in percentage by mass: 30 to 60 percent of boron carbide powder, 5 to 25 percent of carbon dust, 10 to 25 percent of silicon powder and 15 to 45 percent of metal powder. The preparation method comprises the following steps: weighing the components according to corresponding proportions, taking out part of powder from the metal powder according to the demand for later use, and mixing remaining metal powder with other powder to obtain ceramic-metal mixed powder; respectively carrying out layer-by-layer sintering on the metal powder and the ceramic-metal mixed powder by adopting a directional energy field, and repeating the sintering process until material additive manufacturing is finished, wherein the atmosphere in the whole manufacturing process is a protective atmosphere such as vacuum atmosphere or argon atmosphere. The boron carbide composite material prepared by the preparation method disclosed by the invention is of a laminated structure, has the characteristics of high obdurability, good radiation resistance, low density, high reliability and the like, and can be widely used as a high-performance frictional material, an armored protection material, a storage material of a nuclear reactor spent fuel and the like.

The invention relates to a bottom dusting electrical furnace steelmaking process. The technical scheme includes that the bottom of an electrical furnace 1 is provided with 1-6 bottom guns 3 based on electrical furnace steelmaking method with precharing system, current-carrying gas is adopted to blow powder into a metal pool by 1-6 bottom guns 3, and blowing amount of powder is 20-100wt% of addition when the powder is added into the furnace; wherein, the bottom guns 3 are arranged symmetrically or asymmetrically 0-0.7 time of furnace bottom radius away from the furnace bottom center; the bottom gun 3 is in contact or non-contact structure; the current-carrying gas is one of Ar, N2, natural gas, O2 and CO2; the powder is one or more than one of ground quick lime, limestone powder, ferric oxide powder, concentrate fines, carbon dust, dolomite powder, flousper powder, calcium carbide powder and alloy powder; powder granularity is 0.01-0.10mm; blowing technological parameters include that pressure is 0.3-1.2MPa, gas supply flow is 0.1-1.0Nm3/t steel and powder gas ratio is 4-10. The invention has the characteristics that stirring effect is enhanced, metal material yield is improved and residue material utilization ratio is improved, duration of heating is shortened and steel quality is improved.

The invention discloses a preparation method for a base metal oxygen reduction catalyst. The preparation method includes following steps: weighing a defined amount of carbon dust treated by concentrated nitric acid; adding newly steamed pyrrole, oxidizing agent (ferric chloride) and doping agent (para-toluenesulfonic acid) in the carbon dust; decompressing and filtering mixed solution after uniformly stirring; then drying in a vacuum manner for a few of hours; weighing a defined amount of cobalt salt to be mixed with the mixed solution; decompressing and evaporating after uniformly stirring; and calcinating dried powder at a high temperature so as to obtain the base metal oxygen reduction catalyst with good electrochemical performances. The cheap and environment-friendly ferric chloride is used as the oxidizing agent, the base metal catalyst with the excellent oxygen reduction performance is prepared, the maximum peak potential of an oxygen reduction process catalyzed by the catalyst reaches 0.686V, and the maximum electron transfer number reaches 3.84.

The invention relates to a method for directly preparing titanium alloy by titanium concentrate powder, and belongs to the technical field of the preparation process for metal titanium alloys. The method mainly comprises the following steps: taking Gossampinus titanium concentrate powder as a raw material to obtain a fine material of titanium concentrate through ball milling and screening; then performing tabletting and sintering; winding round tablets on a molybdenum rod by using a fine molybdenum wire to prepare a cathode, or sintering the ore concentrate powder to form circular sheets, putting the circular sheets into a small stainless steel crucible directly, immersing the integral small stainless steel crucible into molten salt in an electrolytic cell, leading the small stainless steel crucible out by using the molybdenum wire as the cathode; taking copper solution of saturated carbon dust in a solid oxygen-permeable membrane tube as an anode; taking a corundum crucible as a reaction vessel, and taking CaCl2 as a molten salt electrolyte; taking high-purity argon as protective gas; performing electrolysis at a temperature of 1,100 DEG C under the constant voltage of between 3.5 and 4.0 V for 2 to 6 hours, taking the electrolyzed cathode out, and washing and drying the electrolyzed cathode to prepare the titanium alloy. The method has the characteristics of short flow, high efficiency, no pollution, low cost and the like.

The invention discloses a preparation method of acrylic resin-based glass fiber reinforced plastic, comprising the following steps of: pultruding 100 percent of acrylic resin, 150-200 percent of powdery aluminum hydroxide, 5-30 percent of carbon dust, 0.3-2.5 percent of benzoyl peroxide, 0.2-5 percent of polyethylene glycol and 0.5-6 percent of stearic acid or stearic acid salt by a pultrusion process; feeding the materials into a process tank; and continuously forming by using glass fiber yarn as a vector and a die for heating in three-section areas to obtain the acrylic resin-based glass fiber reinforced plastic. The acrylic resin-based glass fiber reinforced plastic has high combustion property and an oxygen index up to 70; in addition, after 150 parts of aluminum hydroxide and 5-30 parts of carbon dust are filled, the acrylic resin-based glass fiber reinforced plastic keeps high comprehensive mechanical properties, longitudinal stretching strength as high as 500MPa, longitudinal bending strength as high as 400MPa and elastic modulus up to 25.5GPa.

The invention belongs to the field of ceramic materials and relates to a through-pore porous ceramic prepared by using pulverized fuel ash and a preparation method of the through-pore porous ceramic.The industrial solid waste pulverized fuel ash is taken as the raw material, a carbon dust is taken as a pore forming agent, a small quantity of kaolin and potassium feldspar is added as sintering aids, and the porous ceramic is obtained through ball-milling, mixing, dry pressing, and sintering at the high temperature. The mixing ratio of the solid waste of the method is up to 90%, wherein the mixing ratio of the pulverized fuel ash is up to 90% when the mixing ratio of the carbon dust is 5%, the proportion of the industrial solid waste pulverized fuel ash in the ingredients is greatly increased, and the purposes of treating the waste by the waste, comprehensively utilizing the resources and expanding the industry chain of circular economy are fulfilled. The total porosity of the porous ceramic is 38%-56%, the volume density is 1.1 g/cm<3> to 1.6 g/cm<3>, the water absorption is 24-50%, and the porous ceramic can be used for filtering high-temperature flue gas, sewage and the like, andthe application field of the industrial solid waste reutilization product is expanded.

The invention discloses a natural gas dewatering system for using waste heat of molecular sieve regenerated gas. The natural gas dewatering system comprises a first dewatering tower, a second dewatering tower, a dust filter, a mercury removal machine, a carbon dust filter, a regenerated gas heater, a regenerated gas cooler, a regenerated gas separator and a dewatering unit water carbon filter; a cold-hot regenerated gas heat exchange mechanism is additionally arranged and comprises a tube shell type cold-hot regenerated gas heat exchanger (1); hot regenerated gas and cold regenerated gas exchange heat in the cold-hot regenerated gas heat exchanger (1); the hot regenerated gas of a tube pass is cooled, and the cold regenerated gas of a shell pass is heated, so that the waste heat of the hotregenerated gas is recycled. A liquefaction plant with daily natural gas treatment capacity of one million standard m<3>/day is used as an example, the total heat regeneration annual operating time of two dewatering towers is 4,000 hours, and 1,800 MW waste heat can be recycled in one year and is equivalent to 268.28 tce (equivalent value) of standard coal. Through the natural gas dewatering system, the waste heat of the molecular sieve regenerated gas is recycled; the pollution to the environment is reduced; the natural gas dewatering system is energy-saving and environmentally friendly.

The invention relates to a rare earth alloy anode for electrodeposited zinc, and a preparation method thereof, which belong to the field of nonferrous metal application. The rare earth alloy anode for the electrodeposited zinc is prepared from the components in percentage by weight: 0.001 to 0.05 percent of rare earth, 0.2 to 0.5 percent of silver, and the balance lead. The preparation method comprises the steps of feeding a lead ingot into an industrial frequency furnace for melting, and fetching slags when the temperature reaches to 500 DEG C; when the melt temperature reaches to 600 DEG C, feeding a prefabricated lead-silver master alloy; adding a carbon dust covering agent in the industrial frequency furnace; when the melt temperature reaches to 650 DEG C, using a bell jar for adding a rare earth master alloy, and electromagnetically or mechanically stirring for 10min; carrying out closed over-entering and down-out constant-volume casting; and after casting a workblank, rolling and welding to obtain the rare earth alloy anode. According to the rare earth alloy anode for electrodeposited zinc, and the preparation method thereof provided by the invention, the rare earth with refined grains and an anode activation performance is selectively added on the basis of a Pb-Ag binary alloy, and the closed over-entering and down-out castig process is adopted, so that the rare earth investment is less, the burning loss is less, and the effective components in the rare earth in a finished product are ensured to meet the requirement.