55results about How to "Improve erosion performance" patented technology

The invention discloses a tap hole stemming for a large-scale blast furnace and a preparation method. The stemming is composed of a binder and the following ingredients: by weight, 40-50 parts of brown aluminum oxide, 8-15 parts of silicon carbide, 6-12 parts of ferro-silicon nitride, 10-15 parts of clay, 6-9 parts of silicon powder, 2-5 parts of alpha-Al2O3, 6-10 parts of coke powder, 1-3 parts of graphite, and 4-6 parts of high-temperature pitch. The binder is tar. The preparation method comprises steps: according to the above ingredients and weight parts, raw materials are prepared, and mixed uniformly, then tar is added into the raw materials, the mixture is subjected to roller compaction and mixing to form a stemming material. The addition amount of the tar is controlled to make the Marshall value of the stemming material be 1100-1400 KPa, the stemming material is then subjected to pressing and molding to obtain final products. The prepared stemming is advantaged by good integrated performances, high intensity, small average hole size, good heat conductivity coefficient and good performances of resistance to slag and iron, corrosion and washing.

The invention provides a tapping channel casting material with good oxidation resistance. The casting material comprises the following raw materials in percentage by mass: 60 to 70 percent of white corundum granules with a diameter of 0 to 8 millimeters, 2 to 8 percent of silicon carbide with a diameter of 0 to 1 millimeter, 10 to 16 percent of fine silicon carbide powder of 200 to 325 meshes, 2 to 6 percent of Al2O3 super-micro powder, 2 to 4 percent of SiO2 super-micro powder, 2 to 4 percent of asphalt, 2 to 4 percent of aluminate cement, 1 to 2 percent of clay powder, 1 to 3 percent of metal nitride, and 0.05 to 0.2 percent of polycarboxylic acid water reducing agent. The tapping channel casting material has the advantages that: the water consumption of the casting material is obviously reduced, the porosity of the casting material is reduced, the compactness and the strength of the casting material are improved, the flowing property of the casting material is improved, and the constructability of the casting material is improved; the casting material has excellent oxidation resistance and corrosion resistance to molten slag and molten iron; and the service life of the casting material is greatly improved.

The invention relates to an aluminum-plastic separating agent and a preparation method thereof. The separating agent comprises the following components in part by weight: 1 to 25 parts of water, 5 to 50 parts of acidic compound and 25 to 95 parts of organic solvent. The preparation method comprises the following steps of: weighing corresponding components in the proportion in turn, and properly mixing to obtain a uniform phase; and soaking aluminum-plastic crushed matters in the prepared separating solution, stirring, separating and washing to finally obtain 80 to 90 percent of plastic and 8 to 15 percent of aluminum. The separating agent is difficult to volatilize, has a high speed of separating the aluminum and plastic, and does not have oxidation corrosion on the aluminum. In addition, the separating agent has the advantages of readily available raw materials, low environmental pollution and reuse, production equipment and process are simple, and the cost is low. The product prepared by the invention can be widely applied to aluminum-plastic separation of aluminum-plastic packaging materials such as medicines, foods, cosmetics, daily products, industrial products and the like.

The invention discloses an automatic repairing and remanufacturing method of a turbine blade and relates to the technical field of repairing and remanufacturing of turbine blades. The automatic repairing and remanufacturing method comprises the technological steps of scanning an original blade, establishing a three-dimensional model, conducting reverse modeling through a computer, planning a cutting area and a cutting path, conducting cutting, scanning a gap, conducting reverse modeling, conducting gap overlaying planning, conducting printing overlaying, conducting heat treatment, conducting nondestructive examination, conducting machining and conducting scanning. The determined blade is scanned through a robot 3D scanning system, the 3D model of the blade is obtained through software treatment, the to-be-cut area and the cutting path are defined on the model, and then the damaged portion is completely removed or an area to be manufactured is established. By the adoption of the technical scheme, the problems of water erosion damage repair of the blade, repair and upgrading of the blade and the like can be rapidly and efficiently solved at a high quality; and compared with traditional machining, the automatic repairing and remanufacturing method simplifies the machining technology, greatly improves the on-site machining efficiency of the blade and determines a new direction forefficient and intelligent repairing and remanufacturing for the damage of the turbine rotor blade.

The invention provides a low-heat Portland cement with high early strength and a preparation method and application thereof. The cement comprises, by mass, 80-95 parts of low-heat Portland cement clinker, 0-15 parts of mineral slag, 0-15 parts of silica fume, 0.03-0.05 part of graphene oxide and 5 parts of gypsum; the low-heat Portland cement clinker comprises, by mass, 30-45 parts of C3S, 37-47 parts of C2S, 1-5 parts of C3A and 10-15 parts C4AF. Through the addition of the mineral slag and the silica fume as admixtures of the low-heat cement and through the addition of graphene oxide as a modifier, the intrusion of erosive media can be effectively suppressed and the occurrence of initial erosion damage can be delayed, so that the early strength performance of the low-heat cement is improved while low hydration heat and high crack resistance are maintained; the low-heat Portland cement has the advantages of good crack resistance, good resistance to chloride ion and sulfate erosion andthe like, and therefore is more suitable for practical use.

The invention discloses a novel siliceous nuclear power sacrificial material and a preparation method thereof. The novel sacrificial material is mainly prepared from 325-335 parts of PII.52.5-grade portland cement, 175-190 parts of pulverized fuel ash, 15-25 parts of silicon powder, 1,650-1,750 parts of quartz sand, 145-155 parts of water, 7-10 parts of water reducing agent, 1-1.5 parts of polypropylene fibers and 0.5-1.5 parts of sulfonated graphene. The preparation technology is simple, and a common forcing-type single-horizontal-shaft concrete mixer is adopted for preparing the nuclear power sacrificial material which is excellent in liquidity, strength and corrosion resistance. The prepared novel siliceous iron nuclear power sacrificial material has the advantages of good working performance, high strength, good corrosion resistance and the like, is mainly applied to a current third-generation nuclear power station reactor core catcher and has high engineering application value.

The invention discloses a novel ferrosilicon nuclear power sacrifice material and a preparation method thereof. The novel ferrosilicon nuclear power sacrifice material is primarily composed of 375-400parts of PII.52.5 level silicate cement, 130-145 parts of coal ash, 15-25 parts of silicon powder, 950-1100 parts of quartz sand, 900-1050 parts of hematite iron ores, 175-185 parts of water, 7-10 parts of a water reducer, 1-1.6 parts of polypropylene fibers and 0.5-1.6 parts of sulfonated graphene. The preparation process is simple. The nuclear power sacrifice material which is excellent in flowability, strength and corrosion resistance can be prepared by adopting a conventional forced single horizontal shaft concrete mixer. The prepared novel ferrosilicon nuclear power sacrifice material has the advantages of good working property, high strength, good corrosion resistance, is primarily applied to an existing reactor core trap of a third generation nuclear power plant and has wide engineering application value.

The compact ceramic fiber spraying lining consists of ceramic fiber and high temperature binding agent, and the high temperature binding agent has ingredients including fine alumina powder 2.8-3.2 wt%, fine silica powder 3.3-3.7 wt%, nanometer level alumina powder 0.9-1.1 wt%, and ammonia water 0.9-1.1 wt% except water. During forming ceramic fiber spraying lining, one spray gun with several atomizing nozzles around it is used, the high temperature binding agent is pumped into the atomizing chamber and sprayed via the atomizing nozzles while ceramic fiber is sprayed from the spray gun, and the sprayed binding agent and the ceramic fiber are mixed in the air and the mixture is jetted to the lined surface to form the compact ceramic fiber spraying lining. With high strength, excellent waterproof performance, high heat shock resistance, easy construction and low cost, the sprayed lining is suitable for industrial furnace, tower, cylinder, etc.

The invention discloses an anti-erosion molybdenum alloy electrode and a manufacturing method thereof. The anti-erosion molybdenum alloy electrode is prepared by means of solid-liquid doping and multi-element ball-milling doping. The recrystallization temperature of the electrode is higher than 1300 DEG C, the microstructure of the electrode is uniform crystal grains, the dimensions of which are 20-70 [mu]m, and the electrode is prepared from the following components in percent by weight: 3-5wt% of ZrO2, 0.8-1.2wt% of Si, 0.1-0.5wt% of B, 0.001-3wt% of GeO2, 0.001-3wt% of SnO2, 0.001-3wt% of Bi2O3, 0-5wt% of W and 0-4wt% of Al2O3 and the balance of Mo and inevitable impurities. By controlling the content of zirconium oxide and the proportion of silicon and boron in a Mo-Si-B alloy reasonably, the alloy has good anti-erosion capacity, high recrystallization temperature and high-temperature behavior and also has good processing capacity. In addition, other targeted microelements are alsodoped in the molybdenum alloy electrode, so that the anti-erosion capacity to different molten glass is improved.

The invention discloses a multi-scale boride reinforced high-temperature-resistant and molten aluminum erosion-resistant iron-based material and a preparation method thereof. The multi-scale boride reinforced iron-based material prepared by the method is smelted by using an electric furnace, and a formed casting structure consists of a matrix ferrite phase, a rod-shaped Cr-rich M2B (M=Fe, Cr, Mo)boride phase, a net-shaped eutectic Mo-rich M2B boride and a dispersed granular TiB2 phase, so that the multi-scale boride reinforced iron-based material has good molten aluminum erosion resistance and strong toughness. The high temperature hardness at 750 DEG C reaches 300.0-450.0 HV, the room temperature impact toughness is greater than 4.0 J/cm2, and the high temperature molten aluminum erosionrate is reduced by 50%-80% compared with H13 steel. The prepared molten aluminum erosion-resistant iron-based material can greatly prolong the service life of parts and has high economic benefit.

The invention relates to an organic secondary encapsulation slurry for sheet-type resistors, and a preparation method thereof, wherein the organic secondary encapsulation slurry at least contains, by weight, 10-30% of a black pigment, 30-50% of an oxide, 5-10% of an organic resin, and 30-50% of an organic resin, and mixing stirring and rolling with a three-roller grinder are performed to obtain the product. According to the present invention, the organic encapsulation slurry has advantages of good adhesion, good chemical stability, good stability, room temperature storage, and strong competitiveness and broad market prospects in the sheet-type resistor industry.

The invention relates to a calcium-zirconium refractory material and a preparation method thereof. According to a technical scheme of the invention, the preparation method comprises the following steps: with 60 to 80 wt% of calcium oxide particles, 10 to 30 wt% of calcium oxide micropowder and 2 to 20 wt% of zirconium oxide micropowder as raw materials, adding 2 to 7 wt% of phenolic resin into theraw materials, carrying out stirring for 3 to 30 minutes, and carrying out press molding; and placing a molded green body into a high-temperature furnace, carrying out sintering under the condition of 1500 to 1800 DEG C for 3 to 6 hours, and carrying out cooling so as to obtain the calcium-zirconium refractory material. The preparation method provided by the invention has the characteristics of simple process and high production efficiency; and the calcium-zirconium refractory material prepared by using the preparation method provided by the invention has the advantages of high melting point,good thermodynamic stability, excellent vacuum stability, excellent melt erosion resistance and strong high-temperature melt purifying capacity, can be used as a lining of a metallurgical furnace anda container, and specifically meets the needs of clean steel production and vacuum melting.

The invention relates to a production method of chromium corundum bricks with reduction reaction resistance and thermal shock resistance for a non-ferrous metal smelting fuming furnace or a side-blownfurnace. The method includes uniformly mixing the crushed chromium slag, sintered corundum and chromium concentrate; adding into a three-phase electric arc furnace for smelting; smelting to obtain achromium corundum material; crushing, grinding, screening and grading the chromium corundum material to obtain particles with the particle sizes of 5-3mm, 3-1mm and 1-0mm and powder with the particlesizes of 180-mesh and 325-mesh respectively, adding 3-1mm fused zirconium mullite to obtain a mixed premix, adding a binding agent phosphoric acid, uniformly stirring, and standing for more than or equal to 48h; and adding a binding agent aluminum dihydrogen phosphate, mixing, carrying out compression molding, and carrying out high-temperature firing to obtain the chromium corundum brick. The invention has the advantages that the raw material cost is low, the cost performance is high, and the produced chromium corundum brick not only has scouring resistance, erosion resistance and high temperature resistance, but also has reduction reaction resistance and thermal shock resistance, and can be used for furnace slag line parts, bottoms and reaction zones for smelting lead, zinc, tin and othernonferrous metals.