8 results about "Coke rate" patented technology

The invention discloses a method for predicting a coke ratio in a blast furnace smelting process, and relates to the technical field of blast furnace smelting, and the method comprises the following steps: constructing a calculation mathematical model of the coke ratio, calculating a theoretical replacement ratio of a blast furnace through a theoretical replacement ratio formula, and analyzing a relationship between a blast furnace parameter and a pulverized coal utilization rate through machine learning to obtain a predicted pulverized coal utilization rate; and obtaining a coke ratio correction coefficient through machine learning, and substituting the obtained theoretical replacement ratio, the pulverized coal utilization rate and the coke ratio correction coefficient into a calculation mathematical model of the coke ratio to obtain a predicted coke ratio. According to the method for predicting the coke ratio in the blast furnace smelting process, the predicted value and the actual observed value of the coke ratio show good consistency, the relative error is within an acceptable range, the prediction precision of the method meets the engineering application requirement, the change of the coke ratio in the blast furnace smelting process can be effectively predicted, and the method is suitable for popularization and application. The practical feasibility is realized.

The present application relates to the industrial MTO reaction depth and catalyst activity intelligent control method and device. Among them, the control method is to obtain the operation data of MTO production device, set the optimization target of MTO production, take the reaction residue content as the variable reflecting the reaction depth, calculate the reaction residue content optimization value and the reaction coke rate optimization value to realize the optimization target, adopt the automatic control algorithm or the automatic control model, calculate the regeneration air flow regulating valve valve position optimization value and the regeneration slide valve valve position optimization value to realize the reaction residue content optimization value and the reaction coke rate optimization value respectively, and control the regeneration air flow regulating valve valve position and the regeneration slide valve valve position. The device is provided with an intelligent optimization controller, the operation data is obtained through the DCS of MTO production device, the regeneration air flow regulating valve valve position optimization value and the regeneration slide valve valve position optimization value under the optimization target are calculated according to the intelligent control model, and the corresponding optimization control is realized through the DCS.

An iron ore reducing and melting apparatus includes a furnace including from bottom to top: a hearth, a tuyere level, a shaft level and a top level, the blast furnace including at least one first gas injector on the tuyere level, at least one first reducing gas generator connected to the at least one first gas injector, wherein the apparatus is adapted to provide reducing gas including 30-100% (vol / vol) hydrogen on the tuyere level and to operate at a coke rate of below 200 kg / t hot metal.

The invention discloses a compound smelting aid and a refining process of carbonated lead plaster, and belongs to the technical field of secondary lead smelting, that is, the compound smelting aid is added in the refining process, and the compound smelting aid contains a porous carbon-loaded alkaline desulfurizer with large specific surface area and porosity, so that the contact efficiency between the compound smelting aid and sulfide can be increased; the reduction coke rate in the refining process is reduced, the lead recovery rate is improved, and the sulfur dioxide yield is low; calcium oxide loaded on the surface of the coal gasification slag-based porous carbon is desulfurized to generate calcium sulfate to be deposited on the surface, carbon monoxide molecules are adsorbed to the top ends of calcium atoms on the surface of the calcium sulfate under the oxygen-enriched condition through the electrostatic interaction and the physical adsorption effect of the coal gasification slag-based porous carbon, and then carbon monoxide and oxygen atoms attract each other; and carbon dioxide is formed and then is adsorbed on calcium atoms on the surface in an inclined manner, so that conversion from carbon monoxide to carbon dioxide is realized.

A method for operating a smelting furnace installation, in particular a blast furnace installation, includes the following steps:feeding coke, iron oxide containing material and if required fluxing agents to the top of the smelting furnace;injecting a first reducing gas containing hydrogen at a tuyere level of the smelting furnace at a temperature above 1600° C.;injecting oxygen at the tuyere level of the smelting furnace; andinjecting a second reducing gas at a lower shaft level of the smelting furnace. Coke is fed at a lump coke rate below 220 kg / t HM and wherein the rate of oxygen injected at the tuyere level is below 120 Nm3 / t HM.

The invention relates to the technical field of petrochemical industry ethylene cracking, and discloses a method and a system for inhibiting coking of an ethylene cracking furnace. The method comprises the following steps: naphtha and diluted steam I are introduced into a mesoporous emulsifier from a first feeding hole in the bottom of the mesoporous emulsifier containing a nano-emulsification part and a second feeding hole in the side wall of the mesoporous emulsifier for emulsification treatment, and an oil-water emulsified mixture is obtained; the oil-water emulsified mixture is introduced into a first preheating section of a convection chamber of an ethylene cracking furnace for first preheating treatment, and a material I is obtained; introducing diluted steam II and the material I into a mesoporous disperser, and mixing to obtain a material II; and sequentially introducing the material II into a second preheating section of the convection chamber of the ethylene cracking furnace and a radiation chamber of the ethylene cracking furnace, and respectively carrying out heating treatment and cracking treatment. The method provided by the invention can prolong the operation cycle of the furnace tube and reduce the coking rate of the furnace tube of the ethylene cracking furnace in the normal operation cycle of an ethylene device.

This invention discloses a lead-zinc smelting method and system using coke and coal as fuels. The method includes steps for zinc smelting in a closed blast furnace, and further includes a pulverized coal injection step: reducing the coke feed rate and decreasing the hourly coke feed amount; injecting pulverized coal from the tuyeres of the closed lead-zinc blast furnace into the furnace. This smelting method is capable of simultaneously producing metallic lead and metallic zinc. Based on the traditional ISP zinc smelting process, it replaces part of the coke with coal, reducing coke consumption and lowering smelting production costs.

The invention relates to a method for judging whether the particle size or strength of coke is normal or not by utilizing the coke return rate, and belongs to the technical field of blast furnace ironmaking. Performing data cleaning on the return coke rate data to obtain return coke rate data after data cleaning; carrying out normality test on the coke return rate data after data cleaning; and on the premise that the coke quality and the screening system are normal, when the coke return rate data after data cleaning conforms to normal distribution, the coke particle size or strength is normal. According to the method, the coke return rate is formed by acquiring the daily coke return amount and the coke charging amount data, then the cleaned coke return rate data is subjected to normality test, and the abnormal coke return rate is determined according to normal distribution characteristics, so that effective early warning and diagnosis of the abnormal condition of the coke return rate of the blast furnace screening system are realized.