3results about How to "High interfacial tension" patented technology

The invention belongs to the field of metal-based composite materials, and relates to a micro-nano particle reinforced metal-based composite material and a preparation method thereof. Comprising the following steps: mixing micro-nano reinforced particles and salt particles in proportion, heating to melt the salt particles, and ultrasonically stirring to obtain molten salt-micro-nano turbid liquid; smelting a metal matrix to obtain a metal melt, adding the molten salt-micro-nano suspension into the metal melt, stirring to obtain a mixture melt, and preserving heat; stopping stirring, allowing the mixture melt to stand, allowing the micro-nano reinforced particles to enter the metal melt from the molten salt to form an alloy melt, and keeping the temperature until the molten salt and the alloy melt are layered; and casting the alloy melt and the molten salt together, cooling, and stripping the salt body to obtain the micro-nano particle reinforced metal matrix composite material. According to the preparation method, the metal-based composite material with uniformly dispersed micro-nano particles is obtained by optimizing the preparation process, meanwhile, the preparation difficulty and the preparation cost are reduced, and a solution with application potential is provided for industrial production of the metal-based composite material.

This invention relates to a protective slag for sulfur-containing free-cutting steel crystallizers using photovoltaic silicon mud and its preparation method. The protective slag of this invention contains, by mass percentage, 30.6–31.6 wt% CaO, 36.7–37.7 wt% SiO2, 6.1–7.1 wt% Al2O3, 8.2–9.2 wt% Na2O, 5.0–6.0 wt% F, and 9.0–10.0 wt% C. 固 H2O up to 0.5 wt%; C 固 The carbon in the protective slag is fixed. Raw materials include 7-9 wt% silica mud, 14-16 wt% blast furnace slag, 24-26 wt% phosphorus slag, 14-16 wt% silicate cement, 4-6 wt% wollastonite, 10-12 wt% soda ash, 2-4 wt% fluorite, 6-8 wt% cryolite, and 10-12 wt% carbon powder. The preparation method includes batching, slurry preparation (solid content 40-45%), spray granulation (spray gun orifice diameter 1.0-1.5 mm, inlet temperature 450-480℃), and post-treatment. This invention enables the utilization of photovoltaic silica mud, reducing the cost of protective slag containing silica mud by 870 yuan per ton, and increasing the flaw detection pass rate of continuously cast billets from 25.99% to 55.17%, thus possessing both energy-saving and emission-reduction value and a circular economy value.

The invention provides a cement grinding aid as well as a preparation method and application thereof, and belongs to the technical field of cement. The preparation method comprises the following steps: preparing NH2-UiO-66, reacting the NH2-UiO-66 with maleic anhydride to prepare MA-NH2-UiO-66, and carrying out polymerization reaction on the MA-NH2-UiO-66, a monomer 1 prepared from maleic anhydride and diethanol amine, a monomer 2 prepared from maleic anhydride and diol, a silane coupling agent and allyl polyoxyethylene ether to prepare the cement grinding aid. The cement grinding aid prepared by the invention not only can play roles in improving cement particle distribution, exciting hydration power, improving early strength and later strength of cement and the like, but also is beneficial to improving a grinding process in a cement production process, and plays an important role in reducing energy consumption and improving the use efficiency of energy; wide application prospects are realized.