38results about How to "Strong process practicability" patented technology

The invention relates to a low-dielectric porous mullite wave-transmitting material and a preparation method thereof. The porous mullite wave-transmitting material has a closed-pore structure, and its porosity is 30-70%, preferably 30-51%.

The invention relates to a method for recycling waste silicon slag discharged in production of zirconyl chloride and belongs to a method for recycling waste slag discharged in the preparation process of a zirconium compound. The method is characterized by comprising the following steps of: firstly, converting waste silicon slag into an aqueous solution of sodium silicate, filtering, and then using the residue filtered out directly as a raw material for preparing the zirconyl chloride product; performing crystallization treatment on the filtrate, filtering the crystallized product, drying the obtained filter cake, and preparing all of the filter cake into a 4A molecular sieve product; and then realizing complete recycling of the waste silicon slag. The method for recycling waste silicon slag discharged in the production of zirconyl chloride provided by the invention is low in equipment investment and simple and convenient in operation steps. As a result, the environmental pollution of the waste silicon slag discharged in the production of zirconyl chloride in the prior art on soil, water and atmosphere is avoided. The production cost of the zirconyl chloride is obviously reduced, the economic benefit of a zirconyl chloride production enterprise is improved and the development of the zirconyl chloride industry is promoted.

A fluteless rolling technology for rolling steel section includes sequentially determining 14 technological parameters including total cross-section shrinkage ratio of the workpiece to be rolled, the pressing down size of each pass, total number of passes, 5 correcting coefficients, etc, and rolling by fluteless rolling mill while regulating the clamp to the workpieces.

The invention relates to a preparation method of a tungsten nickel iron alloy metallographic phase, which belongs to the technical field of determination of a material surface structure. A machining method is mainly adopted to obtain a metallographic phase tissue structure of tungsten nickel iron alloy. The preparation method comprises a sample preparation step, a grinding step and a polishing step. In the sample preparation process, the tungsten alloy is cut into a sample piece, and after the cold mounting is performed on the sample, a remaining surface metamorphic layer in the electric sparkmachining is removed. In the grinding process, the tungsten alloy sample is inserted into an epoxy resin clamp, the surface of the sample is ground, after the grinding, the sample is ground by adopting diamond spray or diamond grinding paste, and finally the sample is ultrasonically cleaned. In the polishing process, after the sample is polished, the sample is ultrasonically cleaned and dried. According to the preparation method of the tungsten nickel iron alloy metallographic phase prepared in the invention, after the grinding and polishing, the metallographic phase observation can be performed without chemical corrosion, and the obtained metallographic phase is clear and complete in tissue structure and has no defects such as over-corrosion or corrosion pits; and the whole preparation process is safe and environmentally friendly, the operability is high, and the preparation process is simple and reliable.