7 results about "Schreyerite" patented technology

The invention belongs to the field of blast furnace ironmaking, and particularly relates to an iron ore blending method for blast furnace smelting of high-titanium schreyerite, which comprises the following processes: (1) establishing an ore blending model for blast furnace smelting of high-titanium schreyerite; (2) determining the chemical components of the sintered ore and the fuel consumption in the sintering process; (3) calculating the schreyerite proportion; (4) calculating the charging grade; and (5) calculating the pig iron cost. The method not only can stably control the slag components and the slag-iron ratio, but also can obtain the cost of ton iron, thereby providing reference for reasonable ore blending of enterprises.

A method for smelting high-titanium vanadium-titanium magnetite by means of a hydrogen-enriched carbon-recycling oxygen blast furnace. The method comprises: S1, determining a furnace charge structure; S2, determining a furnace charge distribution regime; S3, determining a blast regime; S4, determining a thermal regime; S5, determining a slagging regime; and S6, smelting high-titanium vanadium-titanium magnetite on the basis of the relevant parameters in steps S1 to S5, wherein the furnace charge structure comprises ores, the ores comprise vanadium-titanium sinter and vanadium-titanium pellets, the vanadium-titanium sinter accounts for 10-70% by mass, the vanadium-titanium pellets account for 90-30% by mass, and the in-furnace mass percentage of vanadium-titanium magnetite contained in the vanadium-titanium sinter and the vanadium-titanium pellets is greater than 65%. The present invention can further improve the smelting intensity on the basis of reducing carbon emissions, thereby achieving efficient comprehensive utilization of the high-titanium vanadium-titanium magnetite, and further achieving efficient smelting of schreyerite.

The invention relates to the technical field of blast furnace ironmaking, and discloses a method for reducing alkalinity of high-titanium slag in blast furnace smelting of schreyerite, which comprises the following steps: (1) adjusting a furnace charge structure: controlling the mass ratio of sintered ore to vanadium-titanium pellets to be (9-11): (9-10), and controlling the raw ore proportion to be 2-6wt%; (2) the furnace condition and the furnace temperature are stabilized, the air quantity fluctuation is controlled within 100 m < 3 >, and the oxygen quantity fluctuation is controlled within 1000 m < 3 >; and (3) the temperature of the blast furnace molten iron is controlled to be 1430-1470 DEG C. By reducing the alkalinity of the slag, the normal emission of the slag iron is not influenced, and the effect of reducing the fuel consumption of each ton of iron is achieved.

The application provides a schreyerite adsorbent and a synthesis method and application thereof in treating chromium-contaminated wastewater. The synthesis method of the schreyerite adsorbent comprises the following steps: adding an iron-based amorphous strip into a Na2S2O8 aqueous solution, then adjusting the pH of the system to 2-3.5, and performing reaction; after the reaction is completed, filtering, washing and drying are performed to obtain the schreyerite adsorbent. The schreyerite adsorbent obtained by the method has high surface area and good adsorption performance, can effectively remove Cr(VI) in water as an adsorbent, has short adsorption reaction time, and has a maximum adsorption capacity for Cr(VI) under the same treatment condition, which is significantly higher than that of the existing schreyerite adsorbent, and has a wide application prospect.

The invention provides a preparation method and application of multifunctional magnetic hydrogel, and relates to the technical field of environmental pollution treatment. The embodiment of the invention provides a preparation method and application of multifunctional magnetic hydrogel. The method comprises the following steps: S1, preparing Schwertmannite powder; s2, preparing a magnetotactic bacterium suspension; s3, compounding of Schwertmannite and magnetotactic bacteria; s4, preparing a polyvinyl alcohol solution; s5, preparing an MOF colloidal solution; s6, preparation of the multifunctional magnetic hydrogel: mixing the Schwertmannite-magnetotactic bacterium compound and the MOF colloidal solution in a polyvinyl alcohol solution, and stirring to obtain a precursor solution; and placing the precursor solution under a circulating freezing-unfreezing condition for crosslinking to obtain the three-dimensional network multifunctional magnetic hydrogel. The multifunctional magnetic hydrogel provided by the embodiment of the invention integrates'efficient repair, real-time monitoring and convenient recovery ', and has the characteristics of greenness, intelligence and sustainability.

The invention provides a method for preparing coke by using acid-soluble titanium slag electric furnace fly ash, which comprises the following steps: S1) crushing a coal type of which the fluidity is less than 5000ddpm, and humidifying to obtain a basic coal type; and S2) mixing the basic coal type with the acid-soluble titanium slag electric furnace fly ash, and coking to obtain coke. According to the coke prepared in the invention, the acid-soluble titanium slag electric furnace fly ash is introduced, so that the ability of Buddaler reaction is improved, and meanwhile, iron oxide in the acid-soluble titanium slag electric furnace fly ash is also a raw material for blast furnace ironmaking, so that the yield of blast furnace pig iron is improved; the titanium dioxide has the capability of passivating the coke, so that the strength of the coke in the blast furnace after reaction can be maintained, and the effect of stabilizing the framework of the coke blast furnace can be realized; furthermore, part of the titanium dioxide is reduced into titanium carbonitride, and the rest of the titanium dioxide enters blast furnace slag for schreyerite smelting, so that recycling of the titanium dioxide can be realized, secondary efficient utilization of the fly ash is realized, and the method has great popularization and application values.

The invention discloses a sintering method of a high-alkalinity high-magnesium-aluminum schreyerite ultrahigh material layer, relates to the technical field of schreyerite and blast furnace smelting, and solves the problems that an existing schreyerite sintering method is not suitable for schreyerite with ultrahigh material layer, high alkalinity and high magnesium-aluminum, and the waste of high-alkalinity high-magnesium-aluminum schreyerite resources is serious. Comprising the following steps that a mineral powder raw material is taken and introduced into a sintering device, and a secondary mixing machine is arranged in the sintering device; a secondary mixer of the sintering device is controlled to mix the mineral powder raw materials to obtain a mixture, and the moisture and temperature of the mixture are increased; and finishing sintering to obtain a finished product. The method is suitable for sintering high-alkalinity high-magnesium-aluminum raw materials by optimizing the mineral powder raw material of the sintered ore, optimizing the physical and chemical indexes of the raw material and controlling the moisture and temperature of the mixture in the sintering process. And even if the material layer thickness is 800-1000mm, stable production can be realized, the sintering efficiency is high, the prepared finished product has the effect of stable performance, the production cost is effectively reduced, and the method has superiority.