5results about How to "Improve gelling activity" patented technology

The invention discloses a preparation method of an oil shale-based aggregate ultra-high performance concrete material, which comprises the following steps: (1) uniformly mixing oil shale slag, glass powder, lithium slag powder and magnesium oxide, sintering, cooling to room temperature after sintering, and crushing the sintered product to obtain an oil shale-based fine aggregate; (2) taking the following raw materials: a composite cementing material, the oil shale-based fine aggregate, fly ash, silica fume, modified ardealite powder, fibers, a water reducing agent, sodium hydroxide and / or potassium hydroxide; the composite cementing material is composed of Portland cement and mineral powder. The concrete material is obtained by uniformly mixing the raw materials, adding mixing water and uniformly stirring. According to the method disclosed by the invention, the problem that the strength and the impermeability of the ultra-high performance concrete material prepared by taking the oil shale residues as the fine aggregate are reduced is solved, and the problem that cement components of the ultra-high performance concrete material are wasted is relieved.

The present invention provides a method for producing active micropowder by co-processing manganese slag with a fluidized bed furnace. The preparation method of the active micropowder comprises: first drying the crushed electrolytic manganese slag, then mixing it with a calcination aid and sending it into a fluidized bed furnace for calcination, and finally grinding the calcined sample; wherein the amount of the calcination aid added is 1-15% of the mass of the dried electrolytic manganese slag. The active micropowder of the electrolytic manganese slag obtained by the method of the present invention can be used as a cement admixture and a concrete admixture, thereby realizing the resource utilization of the electrolytic manganese slag.

The invention discloses a method for treating steel slag by utilizing an ironmaking system, which comprises the following steps: S1, placing the steel slag above a blast furnace tapping channel, and preheating the steel slag by utilizing waste heat; s2, 20-30 minutes after the slag iron is discharged from the blast furnace, the preheated steel slag is uniformly added into liquid slag iron generated in the process of discharging the slag iron from the blast furnace, and molten mixed slag is formed in the main iron runner section; in the step S2, the steel slag adding position is located in a main iron runner section 2-4 m away from a blast furnace taphole. The method for treating the steel slag by using the ironmaking system can simultaneously solve the problems of low stability and low gelation activity of the steel slag, does not add new procedures, is simple in process and low in cost, and opens up a new way for resource utilization of the steel slag.

The invention relates to the technical field of concrete, in particular to temperature shrinkage cracking resistant low-carbon concrete and a preparation method thereof. The temperature shrinkage cracking resistant low-carbon concrete is prepared from the following raw materials in parts by weight: 200 to 220 parts of gel material, 340 to 380 parts of fine aggregate, 420 to 450 parts of coarse aggregate, 18 to 25 parts of chopped basalt fiber loaded carbon sphere composite material, 1.2 to 1.5 parts of retarder, 0.8 to 1.3 parts of polycarboxylate superplasticizer and 67 to 72 parts of water, the gel material comprises the following raw materials in percentage by weight: 30-35% of modified steel slag powder, 1-5% of fly ash and the balance of cement. According to the concrete, the short-cut basalt fiber is used for loading the carbon sphere composite material, expansion of temperature shrinkage cracks can be effectively limited, the replacement rate of cement by steel slag powder in the low-carbon concrete is effectively increased by further modifying the steel slag, meanwhile, f-CaO in the steel slag powder can be reasonably utilized, temperature shrinkage of mass concrete can be compensated, and the concrete has a good thermal insulation effect. The crack resistance is improved.

The application discloses a kind of sludge solidifying agent using carbon fixation desulfurization ash, by cement clinker 12~15%, mineral powder 50~55%, steel slag powder 15~20%, carbon fixation desulfurization ash 10~15%, solid additive 1~2%, liquid additive 1~2% composition by mass percentage.The application uses desulfurization ash to fix CO2 in industrial tail gas to improve the activity of desulfurization ash, then carbon fixation desulfurization ash is compounded with cement clinker, mineral powder, steel slag powder, solid additive, liquid additive to obtain sludge solidifying agent.The application does not need to use various chemical means of flotation agent to enrich the carbon fixation component in desulfurization ash, and the cementation activity of desulfurization ash after carbon fixation is greatly improved, can better play sulfate activation effect, and with additive play superposition coupling effect, and with cement clinker, a kind of cementing material system, can jointly prepare sludge solidifying agent, to waste treat waste at the same time, improve the solidification strength of the sludge solidifying agent to sludge and the solidification effect of heavy metals in sludge.