79results about How to "Anti-scour" patented technology

A method for greening side slopes with greening brick cages includes the following steps that restoration is performed, wherein the slope surfaces of the side slopes are finished according to slope ratios, slope heights and flatness of the side slopes, sundries on the slope surfaces are cleaned up, and thus the handled slope surfaces are regular and consistent in slope ratio; meshes are hung, wherein after anchor rods are fixed to the side slopes, the wire meshes are connected with the anchor rods, and the wire meshes are fixed to the side slopes; the cages are hung, the wire mesh brick cages are connected with the anchor rods and the wire meshes so that the wire mesh brick cages can be fixed to the side slopes; borrowed-soil spray-seeding is performed, wherein mixed soil is sprayed in the mesh cages and the wire meshes, and continuous hardened bodies with plant growth matrixes are formed; mixture spraying is sprayed, wherein a mixture made of grass seeds is sprayed onto the mixed soil to form spray-seeding faces; covering is performed, the spray-seeding faces are covered with covering materials. With the method, the side slopes can be effectively greened, borrowed soil can be fixed to the side slopes more firmly, the borrowed soil layers are high in constitutive property, fast greening of the side slopes is achieved, the problem about water and soil loss is solved, and the side slopes have the advantages of being resistant to scouring and landslide, firm, durable and long in greening effect time.

The present invention is metal type paint for centrifugal casting high-alloy furnace tube and its production process. The material includes zirconite powder, silica sol, fluotrite powder, cellulose, PVA and bentonite; and the mixing production process includes dry mixing zirconite powder, fluotrite powder and bentonite inside a crushing roller mill for 15 min, dissolving cellulose and PVA in water and mixing and milling for 3 hr, and adding silica sol and mixing and milling for 30 min. The paint can form coating with increased low temperature strength, increased low temperature plasticity, raised flush resistance and vibration resistance.

The invention relates to an erosion-prevention stop valve seal pair which comprises a valve seat and a valve clack which are corresponding to each other; the seal surface of the valve seat is an outer conical surface; the seal surface of the valve clack is an inner conical surface which is matched with the outer conical surface; the center of the valve seat is provided with a valve seat hole; thecentral part of the inner conical surface of the valve clack is provided with a column structure which can insert in the valve seat hole; the lower end surface of the column structure is set into an arc-shaped concave surface and lower than the seal surface of the valve clack. According to the invention, on the basis of keeping the original seal effect of the stop valve seal pair, the erosion andcorrosion of a medium to the seal surface is relieved, thus the seal ring is always protected, the seal effect is more reliable, and the erosion-prevention stop valve seal pair is especially suitablefor the flow rate control of high-temperature high-pressure gas media.

The invention relates to an inorganic hydrophobic antifouling glaze used for a porcelain insulator as well as a preparation method and an application thereof and belongs to the technical field of improvement of glazes used for the porcelain insulators. The inorganic hydrophobic antifouling glaze used for the porcelain insulator is prepared from the following raw materials in percentage by weight: 3-14% of silica sol, 0.5-4% of methylsilane, 12-21% of acetic acid and 75-89% of propyl alcohol. The inorganic hydrophobic antifouling glaze used for the porcelain insulator is simple in formula, hydrophilicity of the surface of the traditional porcelain insulator is changed, antifouling property is improved, and the inorganic hydrophobic antifouling glaze used for the porcelain insulator has the advantages of aging resistance, scour resistance, good weather resistance, high strength and long life. The invention also provides a simple preparation method and an application of the inorganic hydrophobic antifouling glaze.

The invention discloses a gunning mix for kiln repair. The gunning mix is characterized by comprising the following components by mass percent: 37-41% of dead burnt magnesia, 56-61% of forsterite, 1.0-1.4% of borax, 0.4-0.6% of inorganic salt, 0.2-0.4% of sodium tripolyphosphate and 0.4-0.6% of sodium hexametaphosphate. The gunning mix has the beneficial effects that forsterite and dead burnt magnesia are adopted as main raw materials; the gunning mix prepared with the formula has the advantages of high adhesive rate, good antistrip performance, high sintering speed, erosion resistance, anti-scouring performance and low high-temperature expansibility when applied to kilns and thermal equipment, and has more than 95% of adhesive rate; the mineral resources of the raw materials including magnesia and forsterite are abundant and the auxiliary raw materials can be obtained everywhere, so that the formula is simple and the inventory costs of the raw materials are reduced; the high adhesive rate of the product is favorable for not only achieving reduction of the production cost but also reducing the adverse effects of residues on molten steel.

The invention relates to a mullite brick used for furnace bottom of a COREX furnace, which comprises the following raw materials: 50-70% of mullite homogenizing material, 10-20% of white corundum, 10-20% of andalusite, 5-10% of a-Al2O3, 3-5% of clay, and paper pulp waste liquid accounting for 2-5% of total weight of the above raw materials. The porosity of the mullite brick is low which is less than 16.5%, the compression strength is greater than 100MPa, the thermal shock stability is greater than 30 times, refractoriness under load is greater than 1678 DEG C, all indexes are superior to those of common domestic corundum mullite bricks, and the mullite brick provided by the invention has the characteristics of high mechanical strength, high temperature resistance, erosion resistance and scouring resistance.

The invention is a kind of magnesio high intensity functional filter device, which is box type structure. It is made up of compound left and right boxes, and the middle multiaperture mask. The right box inner cavity has a liquid steel inlet and steel channel of calcium oxide dredge blocking board. The multiaperture is made up of right compound multiaperture board, magnesio multiaperture board, the calcium oxide equal-radius sphere in it and upper magnesio multiaperture board. The left box inner cavity is clean steel room, on top of which there has an air outlet and magnesio dredge blocking board, there has a magnesio dredge blocking weir and liquid steel outlet. The process: the invention uses magnesium oxide as base material, uses calcium oxide, calcium carbonate, zirconium dioxide, titanium dioxide as functional materials. The box body and pieces are pressed and formed, assembled, dried, and baked in the mould. The merits are: the intensity is high, impact resisting, the functional material reacts with nonmetal in the liquid steel, thus 60%-90% impurities in the liquid steel.

The invention relates to a rapid repairing material prepared from a waste high-aluminum brick and a preparation method thereof. The rapid repairing material comprises, by weight, 10-20 parts of waste high-aluminum brick, 5-8 parts of zirconium silicate sand, 20-30 parts of bauxite, 10-18 parts of clay powder, 3-5 parts of kyanite, 2-3 parts of a composite additive and 15-18 parts of a composite binder. The rapid repairing material prepared from a waste high-aluminum brick can replace a high-cost ramming material, realizes recycle of a waste high-aluminum brick, beautifies the environment and reduces a cost. The rapid repairing material is an ideal refractory material for fast first-aid repair of steel rolling and ironmaking thermal furnaces and has the characteristics of high thermal state strength, quenching and quick heating resistance, washing resistance and no baking. Compared with the existing first-aid repair material, the rapid repairing material can shorten a production period by 5-8 days and create large benefits for a client.

The invention relates to an anti-scouring tapping hole sleeve brick, which comprises the following components by weight part: 50-65 parts of fused magnesia, 15-25 parts of corundum, 5-10 parts of magnesium aluminate spinel, 12-14 parts of graphite, 1-2 parts of high temperature asphalt, 1.5-3 parts of metal aluminium powder, 1-2 parts of resin-oatmeal, and 1-3 parts of binder. According to the invention, corundum is a high-grade aluminium raw material which has anti-scouring effect; and the added magnesium aluminate spinel is capable of increasing the high temperature intensity of sleeve brick. The sleeve brick has good anti-scouring and antioxidation effects under high temperature state, service life is greatly increased, and replacing frequency is shortened. The average service life can reach more than 300 heat.

The invention belongs to the technical field of solid waste resource utilization, and discloses a solidified mud soil and construction waste recycled aggregate composite inorganic material and a molding method thereof; a skeleton structure is formed by a graded and mixed construction waste recycled aggregate, gaps of the graded and mixed construction waste recycled aggregate are filled with solidified mud soil, and the solidified mud soil is obtained by adding a high-efficiency water-reducing powder curing agent into engineering waste mud with a certain moisture content for evenly mixing. Thevolume ratio of construction waste regeneration aggregate to solidified mud soil is (80% to 60%): (20% to 40%). The solidified mud soil and construction waste recycled aggregate composite inorganic material adopts waste resources as main raw materials, is low in cost and easy to produce, realizes resource recycling and is in line with the sustainable development strategy; the solidified mud soil and construction waste recycled aggregate composite inorganic material has the characteristics of scour resistance, high strength, good water stability and dry shrinkage and the like after being formed, and is applicable to all kinds of urban road subgrades, subbases, grassroots, mountain landscaping project mountain filling and other projects.

The invention relates to a rubber lining gate valve. The rubber lining gate valve comprises a valve body, a gate plate, a valve rod, a bracket and a hand wheel. The valve body is mainly formed by connecting a left valve body part and a right valve body part which are of a symmetric structure through bolts, wearproof rubber layers are integrally vulcanized on a channel of the left valve body part,a channel of the right valve body part and an end surface of a flange, U-shaped steps are arranged at channel ports of opposite end surfaces of the left valve body part and right valve body part respectively, a U-shaped sealing base is mounted in a U-shaped sealing groove formed by connecting the U-shaped steps on the two sides, and the U-shaped sealing base and the U-shaped outer end face of thegate plate are matched with each other to form a sealing pair. Transverse sealing grooves are respectively formed in the end faces of the left valve body part and right valve body part at the upper end of the U-shaped sealing groove respectively, rubber sealing strips which are in sealing fit with the planes of the two sides of the gate plate are mounted in the transverse sealing grooves in the two sides respectively, and transverse metal scraping blades which are in contact with the planes of the two sides of the gate plate are embedded in the rubber sealing strips. The machining precision ofthe valve body is high, and the valve body has the advantages of great erosion resistance, good wearing resistance, excellent corrosion resistance, superior sealing performance and the like and is applicable to a control valve of a pipeline containing abrasive and corrosive slurry.

The invention relates to a monolithic stopper used for continuous casting, and a preparation method of the monolithic stopper; the monolithic stopper comprises a stopper head and a stopper body, wherein the stopper head comprises the following components by mass percent: 55-65% of SiC particles with the particle size less than or equal to 1mm, 12-15% of SiC powder with the particle size less than or equal to 325 meshes, 20-25% of graphite powder with the particle size less than or equal to 325 meshes, 2-4% of AlN powder with the particle size less than or equal to 325 meshes, 1-3% of Si powder with the particle size less than or equal to 325 meshes and 4-7% of phenolic resin; and the stopper body comprises the following components by mass percent: 55-65% of aluminum-containing raw material particles with the particle size less than or equal to 1mm, 15-20% of aluminum-containing raw material powder with the particle size less than or equal to 325 meshes, 20-25% of graphite powder with the particle size less than or equal to 325 meshes and 4-7% of phenolic resin. The monolithic stopper used for continuous casting has the characteristics of being high in slag erosion resistance, good in thermal shock stability, and high in strength, having anti-scouring performance and high temperature resistance, and the like, and has the service life more than 12h, thus meeting the multi-furnace continuous casting performance requirement and the product quality requirement.

The invention relates to the technical field of environmental protection engineering, in particular to an ecological slope protection method applied to a sand gravel side slope. The ecological slope protection method applied to the sand gravel side slope comprises the steps of side slope soil pretreatment, mixed grass seed preparation, preparation of a composite ecological base material, spray seeding of the composite ecological base material, side slope maintenance and the like. Quantitative slow-release fertilizer, spray-seeding soil and water are mixed into thin slurry to be sprayed to a slope body, the mud content and fertility of a sand gravel matrix are improved, soil is improved, and the water content of the soil is increased; mixed sowing is performed by using a planting system in which pioneer vegetation and long-term vegetation are organically combined, so that the slope vegetation recovery capability is further improved; and through spray seeding of the composite ecological base material with certain thickness for fixing sand, retaining water, increasing fertility and promoting growth, the water-heat-fertilizer-gas effect of the original soil is improved while the surface of the sand gravel side slope is reinforced, the side slope is quickly regreened, the side slope is stabilized, and water and soil loss is reduced.

The invention relates to a revetment structure composed of plastic steel plate piles and concrete. The revetment structure comprises plastic steel plate piles and a concrete coping, wherein the plastic steel plate piles are connected through a connector having two mutually matched ends; the concrete coping is preformed and can be stably buckled with the upper ends of the plate piles. The revetment structure can be used for revetments of rivers or lakes, is safe and stable, high in construction speed, low in construction cost, environment-friendly and pollution-free, less in influence on the surrounding environment, and long in durability, can be further used for resisting the seepage of embankments and dike bodies of rivers and protecting dams.