33 results about "Erosiveness" patented technology

The invention discloses a composite slag weir and a preparation method thereof; and a body of the slag weir is integrally and tightly connected by an upper slag baffling part and a lower molten steelbaffling part. The upper slag baffling part is manufactured by aluminum and magnesium materials; and the lower molten steel baffling part is manufactured by magnesium materials. Based on the situations that the lower part of the body of the slag weir is mainly contacted with the molten steel with more assuasive erosiveness; while the upper part of the body of the slag weir is mainly contacted withthe slag with stronger erosiveness, the magnesium materials with common corrosion resistance as well as the aluminum and magnesium materials with stronger corrosion resistance are respectively adopted as the manufacturing materials for the upper slag baffling part and the lower molten steel baffling part of the slag weir, and the upper part and the lower part of the body of the slag weir of different materials are organically connected into a whole through a preparation technique. The composite slag weir reasonably uses durable goods resources, which not only guarantees the slag weir not to generate pollution to the molten steel, but also greatly prolongs the service life of the slag weir, simultaneously, the service life of the upper part and the lower part of the slag weir is led to bebasically synchronous, thus most economically using the slag weir and effectively reducing the production cost.

The invnetion provides fluoroposphate glass, precision press molding preform, optical element blank, optical element and method of manufacturing the same. A fluorophosphate glass of the invention contains 30 to 50 cationic % of a phosphorus ingredient in terms of P5+, the glass having, in a nuclear magnetic resonance spectrum, a resonance spectrum which is generated near a reference frequency of 31P and has a shape of Gaussian function. The glass of the invention is reduced in volatility and erosiveness.

A device for testing the electrical erosiveness of the electrical contact material is provided, which relates to a test equipment for research on the electrical erosiveness of the electrical contact material. The invention comprises an electrical source, an electrical load, a control circuit, an executive body for operation of the electrical contact and the control and measuring system of the arc process. The test equipment can conveniently adjust the electric parameters of the test circuit and the correct operating parameters of the examined electrical contact, which solves the problems in the existing testing device that the current device for testing the electrical erosiveness of the electrical contact material can not detect and control the correct displacement of the electrical contact and can not realize the synchro control to the relationship between the making and breaking operation and the power phase by the electrical contact. Through the accuracy control to the correct displacement process of the electrical contact in the testing process as well as the strict restriction to the phase angle condition corresponding to the making and breaking process of the electrical contact, the device avoids the discreteness of the testing result of the electrical erosiveness of the electrical contact material, which provides equipment means and experimental basis for the research on the mechanism of the electrical erosiveness of the electrical contact material.

The invention provides a stemming utilizing a waste refractory material and a preparation method thereof. The stemming comprises the following raw materials: silicon carbide particles or fine powder, high-temperature fine asphalt powder, Jilin fine clay powder, coke particles, industrial grade corundum particles or fine powder, wherein recovered aluminum and magnesium material particles or fine powder used for an electric furnace is added; and tar serves as a bonding agent. The preparation method comprises the following steps of: preparing the raw materials according to a proportion; after uniformly stirring particle materials in a stirring machine for 1 to 10 minutes, adding 20 to 30 percent of the tar; stirring for 5 to 10 minutes; adding fine powder materials; stirring for 5 to 15 minutes; adding the remaining tar and stirring for 25 to 40 minutes; and extruding by using a stemming extruder and packaging. The stemming has the following advantages: high operating performance, low stemming sintering shrinkage, rapid sintering property, high scour resistance and slag iron erosiveness. The invention provides a way for regenerating and utilizing the waste refractory material, and contributes to saving resources and protecting environment.

The invention relates to a microporous graphite silicon carbide brick and belongs to the field of refractory material for iron making blast furnace. The microporous graphite silicon carbide brick is prepared from main raw materials of SiC, Si, Ti and pyrolytic graphite and a binder of modified phenol-formaldehyde resin through steps of pugging, die vibration forming, low temperature baking, immersion and high temperature sintering. The brick has excellent thermal conductivity, alkali resistance, inoxidizability, slag erosiveness, small average aperture and apertures with an aperture larger than 1 mum having a volume no more than 4%, and suits for bosh, belly, middle and lower part of a large blast furnace. Besides, the brick has a long service life and substantial economic benefits.

The invention discloses a raw material composition for a graphite-silicon carbide riser tube. The raw material composition comprises the following raw materials in percentage by weight: 30% to 50% of flake graphite, 20% to 50% of silicon carbide, 4% to 10% of elemental silicon powder, 1% to 5% of boron carbide powder, and 10% to 14% of a bonding agent. The manufacturing process of the graphite-silicon carbide riser tube comprises the following steps: mixing raw materials evenly, and manufacturing qualified mud materials; loading the qualified mud materials into mould cavities, putting the mould cavities into an isostatic press cylinder, and pressing and shaping; demoulding, and processing blanks into desired sizes; preheating the blanks, and coating anti-oxidation glaze when the blanks are hot; burning the blanks in a naked mode so that the glaze is melted into glass glaze; detecting an air hole rate, and obtaining finished products if burned blanks are qualified. The process disclosed by the invention is simple, the prepared riser tube has high heat stability, the riser tube is ensured not to be burst, in addition, the riser tube has strong resistance to the erosiveness of molten aluminum, the corrosion problem of an iron riser tube is overcome, and the situation that iron is increased in molten aluminum is prevented; compared with the common riser tube which is combined with silicon nitride and silicon carbide, the production cost is low, and the raw material composition is suitable for large-scale industrial promotion.

The invention relates to a durability reinforced material of concrete as well as a preparation method and application thereof. The reinforced material comprises the following components in parts by weight: 100 parts of original ultra-pulverized fly ash beads, 6-9 parts of water reducing agent, 30-80 parts of ultrafine slag powder, 0.075-0.3 part of air entraining agent, 55-75 parts of excitant and 0.37-1.25 parts of retarding agent. The production method of the durability reinforced material comprises the following steps of: firstly, mixing the original ultra-pulverized fly ash beads with the water reducing agent; and secondly, mechanically mixing the mixture with other components. According to the application of the durability reinforced material, the durability reinforced material of the concrete is doped in cement or cementitious materials, wherein the doping amount of the durability reinforced material of the concrete is 5.0-20.0 percent by weight of the total weight of the cement or cementitious materials. According to the durability reinforced material disclosed by the invention, the capability of the cement of resisting the erosiveness of sulphate can be improved 7-8 times, the capability of the cement of resisting the penetrability of chloride ions can be improved by over 5 times and the service life of a concrete structure is prolonged by 4-5 times.

The invention discloses a testing device of high temperature erosiveness of electrodes for a glass electric melting furnace and a method thereof, and belongs to the field of glassmaking. The testing device comprises electrodes to be tested, a controllable preheating furnace, a rotating base which is arranged at the bottom of the preheating furnace and is driven by means of a motor, a crucible which is disposed on the rotating base and is used for containing erosive molten glass and a furnace lid which is placed on the preheating furnace by means of an adjustment lever. The two electrodes to be tested pass through the furnace lid and are inserted into the erosive molten glass in the crucible. An end of each electrode to be tested above the furnace lid is provided with two connection terminals. A voltmeter is connected in parallel between a connection terminal A1 and a connection terminal B1 of the electrode to be tested A and the electrode to be tested B so as to form a voltage measuring circuit. a connection terminal A2 and a connection terminal B2 are connected in series with an ammeter, a switch and a power supply capable of realizing voltage transformation output to form a current measuring circuit. The testing device provided by the invention has a simple structure, is practical and convenient, has high reliability and stability, and fills up the blank of measuring equipment and measuring methods of this kind.

The invention belongs to an acid-resisting complex phase ceramic coating and a preparation method thereof. Firstly, 2-5 wt% of adhesive and 2-4 wt% of dispersing agent are prepared into concentrated solution, and then 25-30 wt% of water is added to prepare premixing solution; alumina, silica and silicon carbide micro powder are mixed at ratio and are added into premixing solution and the mixture is carried out ball milling for 2 hours; 0.5-1 wt% of catalyst is added for ball milling for 0.5 hour; after slurry viscosity is suitable, the slurry is brushed or sprayed by a spray gun on the surface of materials, such as cement, concrete and the like to form an even coating; and after heat treatment, Al2O3/SO2/SiC series anti-reversion complex phase ceramic coating is obtained. The complex phase ceramic coating not only can be applied on the surface of cement, concrete and the like, but also can be used for the anti-corrosion of metal surface. The coating surface is even and compact, has no cracks and has favorable abrasion performance and favorable acid resistant erosiveness.

The invention discloses a device and method for researching influence of surrounding rock fracture water on a buffer material erosion process, and relates to the technical field of surrounding rock fracture research. The device comprises a pressure/volume controller, a pure water/solution converter, a test rock core, a pressurization structure and a recovery structure, wherein a buffer material sample is arranged in the test rock core, the test rock core is arranged in the pressurization structure, one end of the pure water/solution converter is communicated with the pressure/volume controller, the other end of the pure water/solution converter is communicated with one end of the test rock core, and the recovery structure is used for recovering a solution flowing out of the test rock core. According to the invention, a granite core is processed into a hollow cavity, and compacted bentonite is limited to expand in the cavity; artificial fractures can be cut from a complete rock core, or a cavity for accommodating a bentonite sample is processed from a rock core with natural fractures; and underground water or a specific test solution flows in a test system, and the expansion plugging performance and anti-erosion performance of sodium bentonite under the action of granite crack water are studied.

The invention provides a foundation beam construction method, which comprises the following steps of: foundation trench excavation: increasing the excavation area of a foundation trench so as to facilitate operations of supporting a formwork by short vertical rods, removing the formwork and conveniently leveling the elevation; foundation treatment: compacting the dug foundation trench, digging outa soft soil layer with a preset thickness at a position with non-uniform soil texture in the foundation trench, then using a material with stable performance and no erosiveness as a cushion layer, and filling the dug soft soil layer; support construction: selecting a short rod with the length of 1.2-1.5 m as a vertical rod of a support; and formwork manufacturing: specifically, conducting blanking segmentation on the formwork according to a formwork splicing design drawing, and conducting splicing according to the formwork splicing drawing. According to the construction method, the frame bodyand the formwork are used for well isolating the groove bottom soil layer from poured concrete, the influence of site elevation on construction can be overcome, good effect on construction in rainy seasons is achieved, meanwhile, the cushion layer concrete curing period and the foundation beam groove bottom leveling procedure are omitted, the construction progress is greatly accelerated, and theconstruction efficiency is improved.