The invention provides a non-return-ore sintering production process and device A -5mm return ore circulation sintering procedure in the traditional sintering process is omitted, particle ore screening is added based on an original sintering ore screening system, the 1-5 mm part serves as small-particle sintering ore to be directly used for a blast furnace, and the <1 mm part serves as sintering dust and mixed with other dust to be used Meanwhile, particle ore screening is added under a blast furnace groove, -5mm blast furnace return ore is screened, the 1-5 mm particle part is recycled to be used for the blast furnace, and the <1 mm part serves as dust to be used The non-return-ore sintering process can improve the sintering yield by 20% or above, lowers the sintering energy consumption and pollutant emission by 15% or above, and has remarkable economical and social benefits

Non-return-ore sintering method and device

The invention provides a method for treating metallurgical dust and sludge The method comprises the following steps: drying the metallurgical dust and sludge until the content of free moisture is lower than 025%, mixing with uniform ore, a sintered powder, flux, a coke powder and returned ore, and adding water to stir so as to obtain mixed raw materials; feeding the mixed raw materials into a cylindrical mixer to be mixed, and sintering Compared with the prior art, the method disclosed by the invention has the beneficial effects that 1, compared with the traditional direct landfill method,the method in the invention can achieve effects of recovering lots of iron elements in dust and sludge, reducing soil and underground water pollution and saving land resources; 2, compared with a solidification technology, the method in the invention is low in cost, huge in treatment quantity and high in raw material adaptability; 3, any by-product is not produced

Method for treating metallurgical dust and sludge

The invention provides a uniform mixing technology of recycled solid wastes before sintering, and a production line thereof. Various solid wastes are intensively processed to prepare a uniformly mixed material with suitable water content, homogenous components and single kind, so the stability of products in the reutilization of solid wastes is guaranteed. A uniform mixing production line of the recycled solid wastes before sintering comprises an ash distribution workshop, a slurry distribution workshop and a mixing workshop, the ash distribution workshop conveys quantitatively outputted dedusted ash to the mixing workshop through a scraper plate conveyor, the slurry distribution workshop conveys quantitatively outputted slurry to the mixing workshop through a sludge conveying pipeline, and the strong mixer of the mixing workshop strong stirs ash and slurry to form a bulk uniformly-mixed material used as a standby sintering material. Compared with the prior art, the technology and the production line have the advantages of individual recovery and comprehensive utilization of solid wastes generated in every process in the metallurgical industry, production cost reduction, and environment protection reaching.

Uniform mixing technology of recycled solid wastes before sintering, and production line thereof

The invention discloses a method for producing a sintering ore. The method comprises the following steps of selecting a converter steel-making solid secondary resource, a fuel raw material and a sintering return ore as raw materials used for producing the sintering ore, wherein the converter steel-making solid secondary resource at least comprises the following raw materials: wet dust collection mud, dry dust collection ash, continuous casting cutting iron slag and a solvent raw material; mixing the wet dust collection mud, the dry dust collection ash, the continuous casting cutting iron slag, the solvent raw material and the fuel raw material to obtain a mixture P; sequentially carrying out distribution, ignition and sintering treatment on the mixture P to obtain a mixture Q; cooling the mixture Q, and carrying out screening treatment on the cooled mixture Q to obtain the sintering ore. The method disclosed by the invention realizes the secondary utilization of waste resources, greatly reduces the dependence on an iron ore resource due to no need of carrying out sintering agglomeration by using iron concentrate powder and has the characteristic of low cost.

Method for producing sintering ore

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Method for producing sintering ore