7results about How to "Erosion effect is good" patented technology

The present invention relates to a "plum blossom pile" type air-permeable brick for composite ladle and a preparation method thereof, wherein the air-permeable brick comprises a dispersion block, a castable, a cover plate, an air chamber, a steel shell, and a slit, wherein the dispersion blocks are evenly and spacedly arranged from the center to the outer circle, the castable is filled between the dispersion blocks, the slits are evenly distributed in the castable, the steel shell is wrapped at the outermost part of the air-permeable brick, the cover plate is at the bottom of the air-permeable brick, and an air chamber is left between the dispersion block, the castable and the cover plate. The air-permeable brick produced by the present invention has good air flow stability and uniformity, large gas ventilation volume, high-strength brick body, good anti-permeability and thermal vibration stability, and a long service life.

The invention discloses a hydrolysis-resistant catalyst for polyester and a method for producing low-melting-point TPEE by adopting the hydrolysis-resistant catalyst, and the hydrolysis-resistant catalyst is prepared by the following steps in sequence: firstly, weighing 0.5-1.5 kg of chitosan, adding the chitosan into 1kg of organic alcohol BDO, fully stirring until the chitosan is completely dispersed in the BDO, then dropwise adding 100-300g of surfactant monopotassium phosphate, stirring for 30-60 minutes, and then adding 0.5-1.5 kg of organic alcohol BDO, fully stirring until the chitosan is completely dispersed in the BDO to obtain the hydrolysis-resistant catalyst. Dissolving the chitosan solid in the dispersion liquid completely, then adding acetic acid into the solution, and adjusting the pH value to be 5-6 to obtain hydrolysis-resistant liquid; 1.25-2.5 kg of tetrabutyl titanate is weighed and dropwise added into the hydrolysis-resistant solution, full stirring is conducted till no floccules exist in the solution, meanwhile, the temperature of the solution is increased to 60-100 DEG C, negative pressure distillation is conducted under the condition of 10-40 kPa, low-boiling-point substances are removed, the clear and transparent hydrolysis-resistant titanium catalyst is obtained finally, and the titanium content ranges from 6.14% to 6.67%. The method can improve the catalytic efficiency, and effectively solves the problems that the catalyst is easy to hydrolyze to influence the chromaticity of the product and the catalytic activity is uncontrollable.

The invention relates to a method for solidifying aeolian sand and resisting wind erosion by combining microorganisms with sugar calcium, which is characterized in that a sandy soil body is more sufficiently and efficiently solidified by utilizing a synergistic effect mechanism of combining MICP with sugar calcium, so that the purposes of enhancing the strength of the sandy soil body and resisting natural environment erosion are achieved; in the process of solidifying the sandy soil by combining sugar and calcium with MICP, the sugar and calcium can promote the growth of microorganisms, regulate the reaction environment and contribute to the generation of calcium carbonate precipitates, so that the sandy soil particles play a role in cementation, and meanwhile, the sugar and calcium are dissolved in water to release viscous substances, so that the generated calcium carbonate precipitates are more uniform, and the quality of the soil is improved. The effect of solidifying a sandy soil body is more obvious; the method adopts green and environment-friendly materials, is suitable for reinforcing a large-area sandy soil area, has a very remarkable curing effect, has the excellent characteristic of resisting natural environment erosion, and is widely applied to the fields of sandy soil curing, protection and the like.

The utility model discloses a high-safety steel ladle bottom masonry structure, which relates to the field of refractory materials and comprises a steel ladle body, a ladle bottom permanent layer is laid at the bottom of the inner side of the steel ladle body, a safety layer is laid on the top surface of the ladle bottom permanent layer, a shock absorption layer is laid on the top surface of the safety layer, and a working layer is laid on the top surface of the shock absorption layer. An impact layer is arranged in the center of the top face of the working layer, impact area bottom covering bricks are laid in the impact layer, the impact area bottom covering bricks are vertically laid, the impact area bottom covering bricks are sequentially laid from inside to outside and from top to bottom in a wet mode through fire clay, finally, an approximately-conical impact layer is formed, corundum spinel bricks are laid on the topmost portion of the impact layer, and the corundum spinel bricks are laid on the topmost portion of the impact layer. The impact layer is provided with a plurality of sliding grooves at equal intervals from the top to the bottom along the side wall, the outer side face of the impact layer is paved with outer vertical surface ladle bottom bricks, the design is reasonable, the structure is simple, the maintenance cost is low, the ladle bottom bleed-out risk is reduced, the use safety performance is high, the molten steel impact resistance performance is good, and the service life can be better prolonged.

The invention discloses modified aluminate cement, carbon sequestered phosphoaluminate cement and a preparation method, based on the mineral phase activity and hydration characteristics of aluminate cement, the mineral phase content of CA and CA2 in the aluminate cement and the (CA / CA2) ratio are regulated and controlled within the range of 0.5-1.5, mineral phase matching is optimized, and the engineering performance of the phosphoaluminate cement is improved. The phosphoaluminate cement obtained by compounding the modified aluminate cement, phosphate and an admixture has adjustable setting time, high early strength and later strength and excellent CO2 corrosion resistance, and a novel cementing material is provided for carbon sequestration. And meanwhile, the concrete also has excellent anti-permeability, sulfate corrosion resistance, high temperature resistance, freezing resistance and repairing performance.

The invention relates to graphitized carbon fiber cloth, and belongs to the technical field of silicon carbide preparation. The graphitized carbon fiber cloth comprises a base body and carbon fiber bundles in the base body, the base body is tar pitch, the carbon fiber bundles are graphitized carbon fiber bundles, and the graphitized carbon fiber bundles are arranged in the tar pitch base body in parallel. The included angle phi between the graphitized carbon fiber bundle and the short edge of the graphitized carbon fiber cloth is more than or equal to 0 degree and less than or equal to 90 degrees. The graphitized carbon fiber cloth provided by the invention wraps the outer side of a crucible in a process of preparing silicon carbide by a PVT method, the erosion effect of Si atmosphere on a heat preservation felt can be reduced, so that the uniformity of a temperature field in the growth process of the silicon carbide is improved, and the graphitized carbon fiber cloth has relatively long service life and good reusability.

The application belongs to the technical field of material concrete, and particularly relates to a carbonic acid water erosion resistant concrete and a preparation method and application thereof. The carbonic acid water erosion resistant concrete is made of the following raw materials: ordinary Portland cement, sulphoaluminate cement, fly ash, slag powder, machine-made sand, gravel, water, water reducing agent, retarder, stabilizer, wherein the stabilizer is prepared by compounding a water-soluble polymer and an organic silane hydrophobic agent. The carbonic acid water erosion resistant concrete provided by the application can maintain excellent mechanical properties, anti-permeability and carbonic acid water erosion resistance in a carbonic acid water environment. The application is suitable for engineering application in a karst area or a carbonic acid water environment containing erosive CO2, and can effectively solve the technical problems that the performance of concrete in a carbonic acid water environment is degraded, and the safety and durability of the concrete structure and material cannot be guaranteed.