8 results about "Alkali activated slag" patented technology

The present application relates to solid waste resource utilization technical field, specifically to a kind of three-source solid waste flow state solidified soil and preparation method thereof, by weight fraction, the three-source solid waste flow state solidified soil includes the following components: alkali residue slurry 60~70 parts, tertiary fly ash 10~20 parts, waste mud residue 3~10 parts, cement 10~20 parts and water reducing agent.According to application scene requirement, select control parameter, carry out scheme design, establish prediction model, realize performance prediction, and carry out mix proportion verification, response application scene requirement, form closed loop;And the correlation between microstructure and macro strength is established.The three-source solid waste flow state solidified soil provided by the present application realizes the high-mixing use of solid waste resources, and the solid waste content can reach 80~90%, the fluidity and compressive strength thereof are 160~420mm and 0.47~1.10MPa respectively, which are controllable and adjustable, and can be applied to different application scenarios.

This invention belongs to the technical field of industrial solid waste resource utilization and novel inorganic cementitious materials. It discloses an alkaline slag-based geopolymer and its preparation method, with the core being the synthesis and application of a special composite activator. The special composite activator uses industrial by-products as the main raw material and is synthesized through modification, compounding, and low-temperature calcination processes. This overcomes the technical defects of traditional activators, such as low activation efficiency, slow strength development of geopolymers, high brittleness, and high cost. It can efficiently activate the activity of silicon-aluminum components in alkaline slag, promoting the full progress of the geopolymerization reaction. The alkaline slag-based geopolymer of this invention uses alkaline slag as the main raw material (with a dosage of up to 60%-85%), supplemented with appropriate amounts of silicon-aluminum admixtures, a special composite activator, and a modifier. It is prepared through pretreatment, batching, stirring, molding, and curing steps. Its 28-day compressive strength can reach 40-85 MPa, and its flexural strength can reach 5-12 MPa. It also possesses excellent water resistance, corrosion resistance, and freeze resistance. Furthermore, the preparation process has low energy consumption and no harmful gas emissions, realizing the large-scale resource utilization of alkaline slag. This invention also discloses in detail the synthesis process of special composite activators, which is simple, highly controllable, and has low production costs. It is easy to scale up industrial production and solves the problems of imperfect and limited application of existing alkaline residue base polymer activation systems. It has environmental, economic and social benefits.

The invention belongs to the technical field of building materials, and discloses a fly ash modified environment-friendly building cementing material and a preparation process thereof. The material is composed of 60%-85% of modified fly ash which is crystallized, activated and ground through gradient temperature control, 10%-25% of alkaline residues and 5%-15% of red mud. The modified fly ash is subjected to three-stage gradient heat treatment and ball milling to form a high-activity structure with the amorphous state content of 40-60% and the microcrystal size of 50-300nm; the alkaline residues and the red mud form a composite chemical excitation system, ions such as Ca < 2 + >, Al < 3 + > and SiO3 < 2-> are synergistically released, and co-generation of C-A-S-H and N-A-S-H gel is promoted. The problem of slow early hydration of traditional fly ash is solved, the early strength and long-term durability are improved, the volume stability is excellent, the process is green, the equipment universality is high, industrial amplification is easy, the comprehensive cost is low, and the method is suitable for engineering such as pump concrete, prefabricated part production and road base.

The present application relates to the technical field of steelmaking continuous casting process, and particularly relates to a hot-rolled steel D-type inclusion control method and hot-rolled steel. The hot-rolled steel D-type inclusion control method converts traditional calcium-magnesium-aluminum-silicon complex oxides into high-melting-point magnesium-aluminum spinel through four-step cooperation of "aluminum deoxidization-high-alkali slag-vacuum aluminum control-magnesium modification", and makes the magnesium-aluminum spinel sufficiently float before solidification, so that the D-type inclusions are less than or equal to 0.5 level.

The application discloses a waste alkali-activated cemented filling material for vanadium extraction tailings and a preparation method thereof. The raw material of the waste alkali-activated cemented filling material for vanadium extraction tailings comprises solid raw material, alkaline activator and water; wherein, according to mass percentage, the solid raw material comprises vanadium extraction tailings 60%-80%, gypsum 5%-15%, quicklime 5%-15%, and cement 10%-20%; the alkaline activator is obtained by wet oxidation pretreatment of ethylene alkali residue wastewater; the mass of the alkaline activator accounts for 10%-25% of the mass of the solid raw material, and the mass of the water accounts for 15%-30% of the mass of the solid raw material. The ethylene alkali residue wastewater is pretreated by wet oxidation and then used as the alkaline activator to activate the vanadium extraction tailings, so that waste is treated by waste, and the production cost is reduced; the filling material meets the filling strength requirement, the 28-day compressive strength is above 2 MPa, and the leaching liquid test result meets the environmental standard requirement.

This application relates to the technical field of alkali slag treatment equipment and discloses a continuous separation device for ecological treatment of alkali slag. It includes a crystal-inducing cloth sleeve installed at one end of a horizontal reaction tank. A disturbance mixing structure is movably installed at the end of the horizontal reaction tank near the crystal-inducing cloth sleeve. A slurry conveying structure is connected to one side of the crystal-inducing cloth sleeve. A supernatant discharge structure is fixedly installed at the end of the horizontal reaction tank away from the crystal-inducing cloth sleeve. A slag discharge structure is fixedly installed at the bottom of the horizontal reaction tank. In this application, lime slurry and coarse-particle calcium carbonate slurry are dispersed and flow together into the liquid to be treated at the crystal-inducing cloth sleeve and undergo a causticization reaction. After the reaction, the slurry enters the area where the slurry conveying structure is located after being subjected to the disturbance mixing structure. Subsequently, the supernatant is discharged, the coarse-particle calcium carbonate slurry is returned, and the bottom sludge is discharged. This effectively improves the stability of continuous stratified treatment of the reaction slurry and improves the continuous operation effect of liquid phase output, slurry return, and sludge discharge.

This invention discloses an intelligent control method for the smelting and refining process of lead-bismuth alloys, comprising: A1: acquiring visual images of alkaline slag from the alkaline refining molten pool of lead-bismuth alloys, molten pool smelting temperature data, and stirring operation data, and preprocessing them respectively; A2: acquiring output features from the dust stripping branch, thermal distortion stripping branch, and color deviation stripping branch; A3: performing adaptive fusion to sequentially calculate the characteristic images of alkaline slag from the pure molten pool; A4: calculating the effective alkaline slag visual features; A5: calculating the reaction progress and the critical risk value of excessive bismuth metal burn-off; A6: calculating the reaction termination judgment flag, and terminating the smelting reaction when the reaction termination judgment flag is 1. This invention can solve the problems of traditional methods being difficult to adapt to complex fields of view with strong interference, unable to accurately identify the reaction progress and the critical point of burn-off, and thus difficult to balance the impurity removal effect and the control of bismuth metal oxidation burn-off.