35results about How to "Has a grinding effect" patented technology

The invention provides a chromium-reducing cement grinding aid and a preparation method thereof, which solves the problems of ferrous sulfate and chromium-reducing cement grinding aids in the prior art. Cement grinding aids will be gradually oxidized, which will affect the chromium reduction effect, and there is a technical problem of strict requirements on the use temperature. Its preparation comprises the following components by weight: 10-20 parts of alcohol amine; 5-15 parts of inorganic salt; 2-20 parts of organic acid; 45-83 parts of water. The chromium-reducing cement grinding aid prepared by the present invention not only has the grinding-aiding effect of the grinding aid itself, but also has strong oxidation resistance, is suitable for long-term storage, and can avoid storage being oxidized and affecting the chromium-reducing effect; the finished product is a uniform solution , can avoid the phenomenon of sediment accumulation that is easy to cause pump blockage; and has excellent high temperature resistance, and can well adapt to changes in the temperature of cement working conditions; the production process is simple, easy to operate and quality control, with obvious technical advantages and broad market prospects .

The invention provides a preparation method of an activated grinding aid for concrete composite admixture, comprising: pretreating polyacrylamide to obtain 3 + cationic polyacrylamide solution; add the K12 solution with a mass concentration of 8~12% to the cationic polyacrylamide solution at a constant speed, and at the same time, use an ultrasonic generator with a power of 200~500W and a frequency of 40~120kHz , heated to 60°C and stirred at a constant temperature for 1-2 hours; after the dropwise addition was completed, turn off the ultrasonic generator, stop stirring, and lower the temperature to 50°C for 1-2 hours; put the solution obtained after ultrasonication in a vacuum drying oven, without The activated grinding aid for the concrete composite admixture is obtained by evaporating, drying and concentrating at a temperature exceeding 50°C. The grinding aid prepared by the method of the invention can slowly release K12 molecules during the grinding process to continuously produce the grinding aiding effect, thereby greatly improving the grinding efficiency.

The invention relates to the technical field of glass, in particular to a preparation method of ultra-thin glass, comprising the following steps: (1) taking glass, soaking the glass in a thinning etchant, and performing the first thinning treatment on the glass; (2) The thinned glass is double-sided grinding and polishing; (3) The double-sided grinding and polishing glass is attached to the carrier glass, and then soaked in the thinning etchant, and the glass is subjected to the second thinning treatment to make Get ultra-thin glass. The ultra-thin glass preparation method of the present invention can prepare ultra-thin glass with thin thickness, strong light transmission, good softness, and high touch sensitivity. It is used to prepare ultra-thin glass with a thickness of 0.03mm.