35results about How to "Improve the strength of sinter" patented technology

The invention relates to a sintering technology of ferrochrome mineral powder, which comprises the following steps: adding bentonite binder, fuel and water for uniform mixing after more than 65 percent of mineral powder is ground to -0.074mm, and pelletizing; then, coating a layer of fuel on the surface of the spherulite; loading the product into a sintering machine, with the height of the material layer being 550 to 700mm; and igniting for sintering after drying and preheating, and cooling, smashing and sieving thermal sintered ore, thus obtaining the finished product sintered ore with particle size of 3-40mm and return mineral powder with particle size of -3mm. The technology has simple method and convenient operation, and by activating chromite, the technology reduces the reaction temperature, improves strength and output of the sintered ore, saves consumption of solid fuel, has strong adaptability to material, can realize industrialized production, and is especially suitable for sintering of granular ferrochrome mineral powder or ferrochrome concentrate.

The invention relates to a magnesium-iron-calcium complexing compound flux for a puddling and sintering ore. The magnesium-iron-calcium complexing compound flux for the puddling and sintering ore is prepared from the components in percentage by mass: 0.25 percent to 0.75 percent of organic high-viscosity material, 11 percent to 13 percent of oxygenation sintering flux, and 86.25 percent to 88.75 percent of flux carrier. The organic high-viscosity material is a mixture of one or two of carboxymethylcellulose and a water soluble resin and is 0.25 percent to 0.75 percent by mass; the oxygenationsintering flux is iron oxide red (Fe2O3), has the granularity being less than or equal to 0.044mm, and is 11 percent to 13 percent by mass; and the flux carrier is a mixture of one or two of high-ironhigh-calcium refiring magnesium powder and calcite powder, and is 86.25 percent to 88.75 percent by mass. According to the magnesium-iron-calcium complexing compound flux for the puddling and sintering ore provided by the invention, more than 90 percent of sintering mixture is bonded and pelletized, so that the permeability of a sintered layer is improved, the height of the sintered layer is favorably increased, the solid fuel consumption is reduced, and low-temperature sintering is realized. The permeability of a sintered layer is improved, the sintering speed and the yield are improved, low-negative-pressure air-extracting and sintering can be adopted, the electric consumption is saved, and the energy is saved.