3results about How to "High resource utilization rate" patented technology

The invention discloses a volume-stable high-magnesium Portland cement clinker, a preparation method and high-magnesium Portland cement. The clinker is prepared from the following mineral components in percentage by weight: 45 to 60 percent of C3S, 15 to 25 percent of C2S, 5 to 10 percent of C3A, 10 to 15 percent of C4AF, 2 to 8 percent of Ca3Mg (SiO4) 2 and 0.1 to 1 percent of 3MgO. V2O5. By introducing the vanadium-containing waste catalyst, the sintering temperature of the clinker can be obviously reduced, a 3MgO. V2O5 compound is formed, free magnesium oxide is converted into a combined stable calcium-magnesium compound, the volume-stable high-magnesium Portland cement clinker is obtained, and the autoclaving expansion rate of the cement is less than 0.01% when the content of magnesium oxide in the clinker reaches 4.5-10%.

The utility model discloses a system for improving the activity of lead-zinc tailings, which is characterized in that industrial flue gas tail gas is blown by a grinding device and a fan to carry out coarse crushing and primary mineralization on the lead-zinc tailings, the lead-zinc tailings are activated for the first time in a microwave activation device, and then the lead-zinc tailings are activated for the second time through a superfine grinding device, so that the treatment cycle of the lead-zinc tailings is shortened; the activated lead-zinc tailings lay a foundation for subsequent large-scale utilization and improvement of the recycling rate. The grinding device and the superfine grinding device are connected with the fan, the fan is used for blowing hot flue gas tail gas to dry and mineralize the lead-zinc tailings, and then the fan is used for discharging the mineralized tail gas, so that the lead-zinc tailings can be activated, and the flue gas tail gas can be reused to meet the emission standard; resource utilization is improved; environmental protection is facilitated; and sustainable development is realized.

The application relates to a rapid-forming geopolymer concrete prefabricated component and a preparation method thereof. The technical scheme is as follows: 125-150 parts by mass of sodium metasilicate is mixed with 200-235 parts by mass of water to obtain a solution; the solution is stirred until it is clear, and is cooled to 5-15 DEG C to obtain an alkali activator; the alkali activator is mixed with 225-285 parts by mass of metakaolin, 60-120 parts by mass of fly ash, 400-600 parts by mass of fine aggregate and 550-850 parts by mass of coarse aggregate, is stirred, is poured, and is shaped for 10-30 min; demolding is carried out, and maintenance is carried out at normal temperature for 2-7 days to obtain the rapid-forming geopolymer concrete prefabricated component. The application has the characteristics of high solid waste resource utilization rate, short forming time, low maintenance cost and high mold flow efficiency, can be directly operated on a construction site and can be rapidly and continuously produced, and the prepared rapid-forming geopolymer concrete prefabricated component has early compressive strength.