33 results about "Baddeleyite" patented technology

The invention relates to a magnesium-calcium-zirconium brick manufactured by means of in-situ reaction and used for secondary refining and a production method. During manufacturing, 0-20% of 3 mm-5 mm magnesia particles, 30-55% of 1 mm-3 mm magnesia particles, 4-15% of 0.088 mm-1 mm fine magnesia particles, 2-10% of 0.088 mm-0.5 mm fine desilicated zirconia particles, 5-30% of magnesia powder with the diameter being less than 0.088 mm, 0-15% of calcium zirconate powder with the diameter being less than 0.088 mm, 2-9% of zirconia micro powder with the diameter being less than 0.020 mm, 2-8% of calcium carbonate micro powder with the diameter being less than 0.020 mm, 4-8% of additional waste pulp liquid and 0.2-0.05% of additional third-generation water reducing agents are used; during production, the adopted process includes the steps that firstly, the zirconia micro powder and the calcium carbonate micro powder are premixed; secondly, the 3 mm-5 mm magnesia particles, the 1 mm-3 mm magnesia particles and the 0.088 mm-1 mm fine magnesia particles are added to a mixing mill, and he waste pulp liquid and the third-generation water reducing agents are added to the mixing mill to be mixed; thirdly, magnesia powder with the diameter being less than 0.088 mm, calcium zirconate with the diameter being less than 0.088 mm and premixed zirconia-calcium carbonate micro powder with the diameter being less than 0.020 mm are add and mixed until the mixture is even; finally, forming, drying, 1580-1700 DEG C sintering and checking are conducted on the mixture to obtain a refractory material with periclase-calcium zirconate-baddeleyite as a main crystal phase. The magnesium-calcium-zirconium brick has the advantages of being convenient to manufacture, low in cost, simple to use and excellent in performance, has excellent anti-erosion performance and thermal shock resistance, excellent high-temperature physical and chemical stability, and is competent for the work of secondary refining to make clean steel.

The invention relates to a method for accurately determining zirconium and hafnium components in a zirconium-hafnium mixture by using an extraction spectrophotometric method. In the presence of a large amount of zirconium, the zirconium and hafnium are extracted and separated by using a methylisobutylketone-thiocyanic acid (MIBK-HSCN) system solvent, and the zirconium and hafnium components are accurately determined by combining an arsenazo III spectrophotometry. By the method, the zirconium and hafnium components in tested objects of zirconium oxychloride, baddeleyite, zircon sand, zirconium oxide, ferrozirconium and the like can be accurately determined; and the method has the advantages of high sensitivity, good selectivity, simplicity, convenience and quickness for instrument operation, accurate determination result and the like, and the test cost and the requirement on instrument equipment can be effectively reduced.

The invention discloses a wear-resistant ceramic for daily use and a preparation method thereof. The wear-resistant daily-use ceramics include a daily-use ceramic body and a glaze layer, and the glaze layer is made of the following raw materials in parts by weight: 30-40 parts of zircon sand, 10-15 parts of baddeleyite, and 5-10 parts of syenite, 3-6 parts of titanium carbide powder, 3-5 parts of titanium dioxide, 4-6 parts of lutetium oxide, 2-4 parts of tungsten powder, 2-4 parts of polyvinyl alcohol with a mass fraction of 5wt% 2-4 parts of glycerin, 20-30 parts of water. The wear-resistant daily-use ceramics of the present invention are obtained through synergistic cooperation of components, and the obtained wear-resistant daily-use ceramics have a smooth glazed surface, good texture, excellent hardness and bending strength, and excellent wear resistance.

The invention discloses a production method of electrically melt yttrium oxide stabilized zirconia granulation powder which is profitable, green and environmentally friendly. The method comprises the following steps: adding zircon sand and Y-doped cubic zirconia powder (or Y-Zr powder) in reducing agent for mixing and electric smelting or directly adding baddeleyite for mixing and electric smelting, cooling, performing coarse crushing and fine crushing, screening, performing coarse grinding and fine grinding, performing wet grinding to generate pulp, performing surface modification, performing spray granulation, mixing evenly and packaging. The method of the invention uses Y-Zr powder as raw material, the technical process is simple and easy, the method does not discharge waste water, waste gas and waste residue; the equipment investment is less, the product quality meets user requirements, the production process does not adopt secondary electric smelting and high-temperature heat treatment and add stabilizing agent; and under the same conditions, compared with the stabilized Zr and granulation powder thereof which are produced by the current and popular technology, the granulation powder quality is higher, the performance is better and the cost is reduced by 30-40%.

The invention relates to an electric fused AZS brick corrosion-resistant to low-iron glass, which belongs to the field of refractory materials. The fused AZS bricks resistant to corrosion by low-iron glass are composed of the following mass fractions: ZrO 2 : 31‑45%; SiO 2 : 9‑14%; Na 2 O: 0.6‑1.9%; doped oxide: 0.5‑16.5%, the balance being alumina. The doped oxide is Y 2 o 3 、 Ta 2 o 5 , Nb 2 o 5 Or one or more of SrO. The prepared fused AZS brick has good corrosion resistance, low porosity and high ability to withstand the stress of baddeleyite phase transformation. Compared with ordinary AZS brick, the corrosion resistance is increased by more than 30%, and the glass phase exudates rate reduced by 30%.

The invention discloses a multi-reusable polycrystalline crucible and a molding method thereof, and relates to the technical field of crucibles; the polycrystalline crucible is composed of the following raw materials according to the percentage of the total weight of raw materials: fused silica 25%-35 %, low porosity corundum 25%-35%, zirconia 10%-40%, chromium oxide 10%-30%. Fused quartz, low porosity corundum, zirconia, and chromium oxide of the present invention interact with each other after melting at high temperature to change the crystal structure between the components; in addition, after the raw materials are melted at high temperature, the crystal phases recombine to form a The mullite phase improves the heat resistance of the crucible, the baddeleyite phase enhances the erosion resistance of the crucible, the α-alumina phase enhances the stability of the crucible, and the glass phase enhances the compactness of the crystal; thus making The formed polycrystalline crucible has the advantages of good heat resistance, good toughness, high stability, strong corrosion resistance, and is not easy to break and break.

The invention discloses a zircon self-flowing castable. The zircon self-flowing castable is characterized by comprising aggregate, powder and an admixture, the aggregate is prepared from high-aluminabauxite clinker, sub-white corundum, zirconite and baddeleyite which account for 70-80% of the sum of the mass of the aggregate and the mass of the powder; the powder comprises silica powder accounting for 1-6% of the sum of the mass of the aggregate and the powder, sub-white corundum powder accounting for 1-10% of the sum of the mass of the aggregate and the powder, alumina powder accounting for1-12% of the sum of the mass of the aggregate and the powder, zirconia powder accounting for 2-3% of the sum of the mass of the aggregate and the powder, white mud accounting for 1-10% of the sum of the aggregate and powder, high-alumina bauxite clinker accounting for 0-25% of the sum of agrregate and the power, the mass of the high-alumina cement accounting for 0-3% of the total mass of the aggregate and the powder, and the mass of the pure calcium aluminate cement accounting for 0-6% of the total mass of the aggregate and the powder. The zirconium self-flowing castable is stable in propertyand performance at high temperature and excellent in fire resistance, the cracking resistance can be improved by 2%-3% of zirconium oxide powder, and the fire resistance is integrally improved.

The invention discloses a preparation method for a corundum baddeleyite eutectoid composite nonswirl nozzle inner layer. The method comprises the following steps: preparing ZrO2-Al2O3 composite powder; grading the grain size of the ZrO2-Al2O3 composite powder; adding a rare earth additive; grinding for 24 to 48 hours; adding ZrO2-Al2O3 gel, in amount which is 5 to 10 percent of the total amount of the materials, serving as a binding agent; performing isostatic pressing; drying at the temperature of 105 + / - 5 DEG C for 24 hours; and sintering at the temperature of 1,700 and 1,720 DEG C to prepare the corundum baddeleyite eutectoid composite nonswirl nozzle inner layer, wherein the zirconium oxide (ZrO2) content is 45 + / - 1 percent, the ZrO2+Al2O3 is more than or equal to 95 percent, the corundum baddeleyite eutectoid content is more than or equal to 90 percent, the volume density is 4.50 to 4.60 g / cm<3>, and the cold state pressure-resistant strength is more than or equal to 300 MPa. The result of a test of an applicant shows that the service life can reach 23 hours.

The invention discloses a sorting method and system of baddeleyite. The sorting method of the baddeleyite comprises a first step, a second step, a third step, a fourth step, a fifth step and a sixth step. The sorting system of the baddeleyite comprises a first subsystem, a second subsystem, a third subsystem, a fourth subsystem, a fifth subsystem and a sixth subsystem.

The present invention provides a preparation method of high (001) plane flaky zirconia, which is prepared through hydrolysis and self-reaction of a single reagent of fluozirconic acid. According to the present invention, only two reagents, fluozirconic acid and ethanol, are used in the whole process, 5 synthetic raw materials are simple and easily available, reaction time is extremely short, and reaction temperature is low, thereby avoiding complicated procedures of reaction, calcination, cleaning and the like, and simplifying the process; and synthesized flaky zirconia particles are uniform, intact in crystal plane, high in (001) plane proportion and high in specific surface area, and thus have good application prospects such as adsorption, catalysis and sensing. Drawings x i i E Standard baddeleyite 11 11 1 o 1G2,70 3WO 45G SAG 6W3 72G Raman displacement (cm) * Warmingup * k * Eu * .- ~ * £ * *S * * * qbqh 4%44 4 4 a