46results about How to "Low refractoriness" patented technology

The invention discloses a high-temperature glaze coating, a preparation method thereof, a binder and a using method of the coating, and aims at solving the problems of poor high-temperature resistance, low emissivity and absorptivity in a high-temperature zone, instability, and easiness of attenuation of the existing far-infrared energy-saving coating. The high-temperature glaze coating has the characteristics of good radiation heat transfer effect, high external blackness (the emissivity is greater than 0.95) and the like, and has the advantages of stable emissivity and absorptivity, non-attenuation performance and long service life in a long-term use process. Meanwhile, the coating can be tightly combined with a basal body by matching with the binder disclosed by the invention; the adhesive force is increased; a glazed ceramic polymer can be formed on the basal body after high-temperature sintering; the high-temperature glaze coating has the advantages of hardness, abrasive resistance, and long service life, and does not fall off; and the coating disclosed by the invention can also evenly coat the surface which cannot be covered by general coatings.

The invention discloses a preparation method of ceramic bond for a low-temperature high-strength cubic boron nitride (CBN) grinding tool, which comprises the following steps: evenly mixing 35-75% of a, 2-15% of b, 5-20% of c and 5-25% of d by weight percent, grounding and sieving, melting at 1200-1400 DEG C for 1-6h, carrying out water quench, drying, secondary grinding and secondary sieving to obtain basic ceramic bond, and evenly mixing the obtained basic ceramic bond with nano oxide the weight of which accounts for 0.2-15% of that of the basic ceramic bond to obtain the ceramic bond of theinvention, wherein the a is silica or silicon dioxide, the b is aluminum hydroxide or aluminum oxide, the c is anhydrous sodium carbonate or sodium oxide, and the d is boric acid or boron trioxide. Through adding nano oxide to the basic ceramic bond, the refractoriness of the basic ceramic bond is reduced by 10-50 DEG C, the fluidity is improved by 5-25%, and the breaking strength is improved by 5-45%.

Light spherical ceramsite filter materials and their preparation method characterized in that red mudstone and fly ash is used as main materials, slight pore-forming agent is doped therein, wherein red mudstone in 40-70% by weight, fly ash in 28-55% by weight, and pore-forming agent in 1-5% by weight, and the products are given by grinding, mixing, palletizing to forming spherical particles with 3-10mm diameter and by dry prebraking for 10-20 min at a temperature of 300-500 DEG C., and by calcining for 10-30 min at a temperature of 1050-1180 DEG C. The products can be provided with evenly porousness, and by simply process.

The invention provides a steel ladle edge refractory castable which comprises the following raw materials in percentage by mass: 40-60% of flint clay aggregate, 15-25% of used magnesia carbon bricks, 15-25% of high aluminium bauxite, 1-3% of cement, 1-2% of borax glass, 2-3% of spodumene, 3-4% of kyanite, 2-3% of silicon micro-powder, 1-2% of steel fiber and 1-2% of binding agent, wherein the binding agent comprises at least one of sodium tripolyphosphate, sodium hexametaphosphate and explosion-proof fiber. According to the steel ladle edge refractory castable provided by the invention, high strength, bonded slag resistance and an excellent anti-heat shock stability property are taken into consideration, and the using quality of the steel ladle edge material is greatly improved.

The invention discloses dry powder lost foam casting coating and a preparation method thereof. The dry powder lost foam casting coating is composed of following raw materials of, by weight, 70-76 parts of high aluminum powder, 15-19 parts of zircon powder, 7-9 parts of meerschaum, 1-3 parts of sodium bentonite, 0.6-1.5 parts of dispersing agents NNO, 1.2-3 parts of sodium pyrophosphate, 1.5-3 parts of yellow dextrin, 1-1.5 parts of potato powder, and 0.01-0.03 part of antifoaming agent. According to the obtained dry powder lost foam casting coating, the coating thickness is even, a coating isflat, the high-temperature strength is high, and the coating hanging performance is excellent.

The invention discloses an additive raw material composite and an additive for a superhard material product, a preparation method of the additive, a combined binder and the superhard material product. The raw material composite is composed of the following components including, by mass, 25%-40% of Bi2O3, 25%-40% of B2O3, 5%-25% of ZnO, 2%-10% of SiO2, 2%-10% of Al2O3, 1%-5% of Na2CO3, 1%-5% of Li2CO3, 0%-5% of MgCO3 and 1%-5% of CaF2. The additive prepared from the raw material composite has a microcrystal structure and is larger than 200 MPa in strength, the refractoriness of the additive is lower than 500 DEG C which is far lower than the sintering temperature of the metal binder superhard material product, the additive is uniformly dispersed and fine in structure among framework particles after sintering, the influence on the integral strength of the product is small, and accordingly, the grinding efficiency of the metal binder superhard material product can be remarkably improved and the service life of the metal binder superhard material product can be remarkably prolonged.

The invention belongs to the technical field of sludge reclaiming resource utilization, and in particular relates to lightweight high-strength ceramic particles manufactured by using urban sludge and a manufacturing method for the lightweight high-strength ceramic particles. The method comprises the following steps of: crushing 30 to 50 parts of building garbage to obtain crushed building garbage; and mixing the crushed building garbage, 40 to 60 parts of urban sludge and 40 to 60 parts of potassium feldspar powder uniformly, roasting the mixture for 20 to 120 minutes at the temperature of between 1,150 and 1,500 DEG C, cooling, and thus obtaining the lightweight high-strength ceramic particles. The urban sludge, the building garbage and the potassium feldspar powder are mixed in a certain ratio and coordinated, so that the strength of the lightweight high-strength ceramic particles reaches 60 to 120MPa, and the ceramic particles have more excellent physical and mechanical properties compared with common natural stones. According to the ceramic particles and the manufacturing method, wastes can be changed into valuable, environmental pollution is improved, and the innocent, reduction and recycle principles of Chinese solid waste treatment are met; and the invention has remarkable economic benefit and social benefit.

The invention discloses a high-temperature ceramic binder and a preparation method thereof. The ceramic binder is composed of the following materials in parts by weight: 40-46 parts of SiO2, 35-45 parts of B2O3, 25-32 parts of TiO2, 5-10 parts of MgO, 8-15 parts of Li2O, 10-20 parts of CaCO3 and 2-8 parts of Na2O. By fully mixing all the raw materials in a ball mill, adding water, carrying out ball milling for 6-8 h, standing for 3-4 h, pouring out the water, drying at a temperature of 90-105 DEG C, and then carrying out ball milling and sieving the obtained product so as to prepare the ceramic binder. The ceramic binder prepared according to the invention has the characteristics of low refractoriness and high strength.

The invention relates to the field of ore, in particular to a silica processing pretreatment device. The technical problem is to provide the silica processing pretreatment device. According to the technical scheme, the silica processing pretreatment device comprises a bottom frame, a supporting frame, a control display screen, a stepping motor, an edge grinding mechanism, a color system sorting mechanism, a film layer removing mechanism and a storage bin, wherein and the bottom frame is welded with the supporting frame. The device has the effects that the edge grinding treatment is carried outon silica with sharp edges and corners in advance, so that the abrasion to a machine during further processing is avoided; and meanwhile, machine chippings are mixed into silica raw materials, and the reddish-brown silica with iron oxide films is sorted out through color discrimination to be washed with acid liquor, so that the waste of a large amount of acid liquor and low treatment effect caused by treatment on all the silica raw materials are avoided, the removal of the iron oxide films is beneficial to further processing on the silica raw materials, and the quality of silica products is improved.

The invention discloses a casting long and thin hole forming sand core structure. End portion fireproof casing pipes, a transition fireproof casing pipe, a process steel pipe, a casing pipe bonding resin layer, an outer sand core layer, an inner sand core layer and end face sealing layers are included. The transition fireproof casing pipe is arranged between the end portion fireproof casing pipes,the transition fireproof casing pipe and the end portion fireproof casing pipes are in butt joint through the casing pipe bonding resin layer to form a hollow fireproof casing pipe. The process steelpipe is coaxially arranged in an inner hole of the fireproof casing pipe. A ventilation hole is formed in a pipe body of the process steel pipe. The outer sand core layer is arranged between an innerhole of the process steel pipe and the inner hole of the fireproof casing pipe. The inner sand core layer is arranged in the inner hole of the process steel pipe. The end face sealing layers are arranged at the two ends of the outer sand core layer. An air outlet channel is arranged at the center of the inner sand core layer. According to a long and thin casting hole sand core of the structure, the defects that an ordinary sand core is low in surface fireproof degree and is prone to burning losses, burning through, washing damage or washing fracture through high-temperature molten iron can beeliminated, sand discharging and process steel pipe recycling and repeated usage are facilitated, the sand usage amount is small, and the casting cost is low.

The invention discloses a low-temperature ceramic bond and a preparation method thereof. The ceramic bond is prepared from the following substances in parts by weight: 36-45 parts of SiO2, 23-33 parts of B2O3, 30-40 parts of Fe2O3, 2-8 parts of CaO, 7-10 parts of Li2CO3, 3-5 parts of KNO3 and 6-9 parts of Na2O. The preparation method comprises the following steps: sufficiently mixing all raw materials in a ball mill; adding water, carrying out ball milling for 10-15 hours, and standing for 3-4 hours; pouring the water out, and baking at 90-105 DEG C; and carrying out ball milling, and screening to prepare the ceramic bond. The prepared ceramic bond has the characteristics of low refractoriness and high strength.

The invention provides a method for preventing crush of a slag ladle when positioning furnace washing slag, which comprises the steps of: paving paint wasted by a tundish used by continuous casting steel at the bottom of the slag ladle, wherein the paved paint is 200-220 mm thick; then paving 800-820 kg of wasted oxidized steel slag of a rotary furnace, wherein the grain size of the steel slag is smaller than 100 mm; and carrying out slag positioning operation by using the slag ladle to effectively prevent damage caused by crush of the ladle when positioning furnace washing slag. The wasted paint used consists of 80% of powder and 20% of mixture of which the grain size is 30-50 mm.

The invention discloses a ceramic bond and a preparation method thereof. The ceramic bond is prepared from the following substances in parts by weight: 20-30 parts of Na2O, 30-40 parts of B2O3, 45-50 parts of Al2O3, 15-30 parts of SiO2, 8-10 parts of Li2CO3, 1-5 parts of KNO3 and 5-10 parts of TiO2. The preparation method comprises the following steps: sufficiently mixing all raw materials in a ball mill; adding water, carrying out ball milling for 10-15 hours, and standing for 3-5 hours; pouring the water out, and baking at 90-110 DEG C; and carrying out ball milling, and screening to prepare the ceramic bond. The prepared ceramic bond has the characteristics of low refractoriness and high strength.

The invention provides a brick. The brick mainly comprises plastic clay, quartz sand, wollastonite, feldspar, a toughening material, a ceramic pigment and the like. The brick can present complicated patterns, the colors and patterns of the brick are enriched, and the complicated beauty of Chinese blue-and-white is reproduced by utilizing the material of the clay brick to reproduce the skill of group fine work. In addition, the invention further relates to a manufacturing process of the brick, according to the process, a complicated pattern structure is divided into simple unit pieces, then the simple unit pieces are pressed and formed respectively, then the simple unit pieces are spliced into complicated patterns and fired, the preparation process of the complicated pattern structure is simplified, the requirement for the process technology is met, and the physical performance of the brick in the aspects of breaking strength and the like is improved.

The invention discloses a high-strength ceramic bond and a preparation method thereof. The ceramic bond is composed of the following substances of, by weight, 1-3 parts of sodium pyrophosphate, 5-8 parts of borax, 2-3 parts of sodium silicate, 0.02-0.05 part of magnesium oxide, 1-2 parts of modified phenolic resin, 0.5-0.8 part of calcite, 0.2-0.4 part of barium sulfate and 0.1-0.5 part of calciumcarbonate. All raw materials are sufficiently mixed in a ball mill, then water is added, ball milling is conducted for 6-8 h, and then still standing is conducted for 3-4 h; and the water is poured out, drying is conducted under the condition of 95-105 DEG C, and then ball milling and sieving are conducted to prepared and obtain the ceramic bond. The prepared ceramic bond has the characteristicsof being low in fire resisting degree and high in strength.

The invention discloses a high-temperature ceramic bond and a preparation method thereof. The high-temperature ceramic bond comprises the following substances in parts by weight: 2-6 parts of iron ore, 5-6 parts of zinc oxide, 5-10 parts of TiO2, 1-1.5 parts of MgO, 3-8 parts of clay, 1-3 parts of boron nitride, and 1-2 parts of barium oxide. The preparation method comprises the following steps: sufficiently mixing all the raw materials in a ball mill, adding water, performing ball milling for 6-8 h, then standing for 3-4 h, pouring water out, drying at the temperature of 90-105 DEG C, performing ball milling again, and sieving, thereby obtaining the high-temperature ceramic bond. The high-temperature ceramic bond prepared according to the preparation method has the characteristics of being low in degree of fire resistance and high in strength.

The invention relates to a sol-gel preparation method of a ceramic bonding agent. The preparation method comprises the steps that 1) zinc acetate and zirconium acetate are taken and dissolved in an acetic acid solution to prepare a mixed solution A, and sodium nitrate, lithium nitrate and aluminum nitrate are taken and dissolved in a boric acid solution to prepare a mixed solution B; 2) tetrabutyltitanate is taken and added into absolute ethanol to prepare a solution, the mixed solution A is added, and heat reaction is carried out under ultrasonic conditions to prepare sol A; 3) firstly the mixed solution B is added into acidic silica sol for mixing uniformly, and then the sol A is added to prepare mixed sol; 4) ammonia is added into the mixed sol under the ultrasonic conditions, so thatpH of a system reaches 5 or above, and wet gel is prepared; and 5) the obtained wet gel is dried, sintered and cooled to obtain the ceramic bonding agent. According to the preparation method, the uniform mixing of components of the ceramic bonding agent at the molecular level is promoted through smooth rubber alloy, the grain size is small, the reactivity is high, refractoriness is greatly reduced, and high-temperature fluidity is significantly improved; and formed pores after sintering are small and uniform, the structure is uniform without defects, and the mechanical strength is high.

The invention discloses a dual-sealing mechanism for a tank cover of an aluminum melt degasification tank. The dual-sealing mechanism comprises an inner sealing strip, an outer sealing strip, wrappingcloth and an L-shaped part, wherein the outer sealing strip is away from a furnace chamber of the degasification tank relative to the inner sealing strip; the inner sealing strip and the outer sealing strip are wrapped with the wrapping cloth; the L-shaped part comprises a first flat plate and a second flat plate which are in vertical butted joint, the first flat plate is connected and fixed witha batten, so that the inner sides of the wrapping cloth are attached, the inner sealing strip and the outer sealing strip are separated to constitute a clearance groove, the batten is located at thebottom of the clearance groove, and the second flat plate is connected and fixed with the tank cover; channel steel is fixed on the tank cover and comprises a third flat plate and a fourth flat platewhich are parallel to each other, a fifth flat plate is vertically connected between the third flat plate and the fourth flat plate, a nut is fixed on the fourth flat plate, and a through hole coaxialwith the nut is formed in the fourth flat plate; a cushion block is fixed on the third flat plate. With the adoption of the dual-sealing mechanism, the thermal insulation effect of the tank cover isimproved, and the sealing strips are convenient to dismount and mount and are connected stably after being mounted.

The invention discloses a method for producing an alkali-free glass fiber by albite serving as a fluxible clarifying agent. The method comprises the following steps of: (a) weighing; (b) burdening; (c) melting; (d) accessing; (e) wire-drawing; (f) drying; and (g) subsequent working. The alkali-free glass fiber comprises the following components in parts by mass: 60 to 140 parts of kaolin, 280 to 450 parts of pyrophyllite, 150 to 200 parts of calcined lime, 60 to 90 parts of dolomite, 60 to 90 parts of colemanite, 130 to 230 parts of quartzitic sandstone, 15 to 30 parts of fluorite and 15 to 30 parts of albite, and the sum of the proportions of the components is 1,000. According to the method, the albite is used as a fluxible clarifying agent, so that crystals are prevented from being separated out and damaging a product during forming of the glass fiber. The albite can be used for reducing the fire resistance of the kaolin, so that the industrial production difficulty is reduced. According to the method for producing the alkali-free glass fiber, the cost and the production difficulty are reduced, the stability of melting temperature and the quality of the product are improved, and relatively high economic benefit is realized.

The invention relates to a plastic refractory for repairing a furnace lining of a medium-frequency induction furnace and a preparation method of the plastic refractory. According to the technical scheme, 63.0 wt%-78.0 wt% of vanadium iron slag, 12.0 wt%-17.0 wt% of basalt, 8.0 wt%-13.0 wt% of bauxite and 2.0 wt%-7.0 wt% of bentonite serve as raw materials, a binding agent accounting for 4.0 wt%-5.5 wt% of the raw materials is added, the raw materials are mixed to be uniform, and the plastic refractory for repairing the furnace lining of the medium-frequency induction furnace is obtained. The vanadium iron slag comprises the following main chemical components: more than or equal to 83.5 wt% of Al2O3, more than or equal to 9.0 wt% of MgO, less than or equal to 5.0 wt% of CaO, less than or equal to 0.3 wt% of SiO2, less than or equal to 0.2 wt% of Fe2O3 and less than or equal to 0.2 wt% of IL. Therefore, the method has the characteristics of environmental friendliness, simple process and low production cost; and the prepared plastic refractory for repairing the furnace lining of the medium-frequency induction furnace is convenient in construction mode, high in bonding strength, excellent in slag resistance and long in service life.