Method for enabling waste active carbon powder to be used for sintering, sintering mixture and sinter

A technology for sintering mixed materials and waste activated carbon, which is applied in the field of sintering and can solve problems such as affecting the output of sintered ore.

Active Publication Date: 2020-07-31
武汉钢铁有限公司
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Problems solved by technology

[0004] The embodiment of the present invention provides a method of using waste activated carbon powder for sintering, sintering mixture and sintering ore, so as to solve the technical problem that the activated carbon recovered in the desulfurization and denitrification process is used as sintering fuel and affects the output of sintering ore

Method used

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  • Method for enabling waste active carbon powder to be used for sintering, sintering mixture and sinter
  • Method for enabling waste active carbon powder to be used for sintering, sintering mixture and sinter
  • Method for enabling waste active carbon powder to be used for sintering, sintering mixture and sinter

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Embodiment 1 to Embodiment 5

[0052] Embodiment 1 to embodiment 5 provide a kind of method that waste activated carbon powder is used for sintering, sintering mixture and sintered ore, and sintering mixture comprises activated carbon, coke powder, iron ore material and solvent, and the proportioning of waste activated carbon powder is 0.6-1.4%, its moisture content and particle size composition are shown in Table 1; the proportion of coke powder is 3.1-3.7%, its moisture content and particle size composition are shown in Table 1, and the alkalinity of sintered ore is 1.9-2.0. The iron ore material is selected from the returned ore and the mixed ore. The mixed ore is the ore after mixing various iron ore materials. The solvents include limestone, dolomite and quicklime, the compositions of which are shown in Table 2. The specific ratio of each raw material is shown in Table 3.

[0053] The sintering mixture is mixed with water, granulated, distributed, ignited and sintered to obtain sintered ore. Wherein,...

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Abstract

The embodiment of the invention provides a method for enabling waste active carbon powder to be used for sintering, a sintering mixture and sinter. The waste active carbon powder is generated when sintering smoke is purified by active carbon. The method includes the steps that the waste active carbon powder and coke powder are mixed according to the mass ratio of (12-37.8):(62.2-88), and sinteringfuel is obtained; the granularity of the waste active carbon powder is smaller than or equal to 3 mm, wherein the mass fraction of the waste active carbon powder with the granularity smaller than 0.5mm is 70%-80%; the granularity of the coke powder is smaller than or equal to 8 mm, wherein the mass fraction of the coke powder with the granularity smaller than 0.5 mm is 10%-15%; the sintering fuel, to-be-sintered iron ore powder and a solvent are mixed, and the sintering mixture is obtained; the mass ratio of the sintering fuel to the to-be-sintered iron ore powder is (3-6):(75-90); and afterbeing pelletized, the sintering mixture is sintered. By the adoption of the method, the sintering rate can reach 88.87%, the yield of the sinter can reach 76.44%, the prepared sinter is good in metallurgical performance, the drum strength of the sinter is larger than 81%, the SO2 concentration of exhausted smoke is not larger than 38 mg/m<3>, and the NOx concentration is not larger than 94 mg/m<3>. Meanwhile, secondary utilization of the waste active carbon powder is achieved.

Description

technical field [0001] The invention belongs to the technical field of sintering, and in particular relates to a method for using waste activated carbon powder for sintering, a sintering mixture and a sintering ore. Background technique [0002] At present, the desulfurization and denitrification device of the flue gas of the sintering machine adopts the activated carbon flue gas purification device in the adsorption tower to purify the flue gas. Because the activated carbon is porous, has a large surface area and strong adsorption capacity, it can comprehensively remove sulfur dioxide in the flue gas of the sintering machine head. Harmful substances such as nitrogen oxides and dioxins can completely eliminate the corrosion of the surrounding environment by the discharged harmful substances, and can greatly reduce the emission of particulate matter. The activated carbon in the activated carbon flue gas purification device is added into the adsorption tower from the top of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16C22B1/24C21B5/00
CPCC21B5/008C22B1/16C22B1/24
Inventor 肖慧李军沈文俊张江鸣
Owner 武汉钢铁有限公司
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