Method for controlling ferrous oxide content in sintering ore

A technology of ferrous oxide and sintered ore, which is applied in the field of ironmaking sintered ore preparation, can solve the problems of unfavorable blast furnace smelting stable production, complicated operation, and many steps, and achieve the goal of reducing solid fuel consumption, reducing consumption, and saving sintering costs Effect

Inactive Publication Date: 2012-07-04
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thereby, cause these method steps to be more, the operation is more complicated
Moreover, many methods cannot stably control the content of FeO in sintered ore within an appropriate range, which is not conducive to the stable production of blast furnace smelting

Method used

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  • Method for controlling ferrous oxide content in sintering ore
  • Method for controlling ferrous oxide content in sintering ore
  • Method for controlling ferrous oxide content in sintering ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The material structure and operation of the sintering machine are as follows: new material 38.2kg / m, cold return ore 17kg / m, hot return ore control at 1.8kg / m, dust removal ash 1.3kg / m, blast furnace dust ash wet ratio 2%, coke The powder-to-wet ratio is 4.4%, the calculated value of fixed carbon in the mixture is 2.86%, the speed of the sintering machine is 1.6m / min, the thickness of the material layer is 668mm, and the sintering end point is 310°C.

[0046] The results show that sinter FeO: 7.51%; compared with the comparative example, the stability rate of sinter FeO increases by 1.76%, the drum strength increases by 2.01%, and the solid fuel consumption of sinter decreases by 1.54kg.

Embodiment 2

[0048] The material structure and operation of the sintering machine are as follows: new material 38.7kg / m, cold return ore 18.2kg / m, hot return ore controlled at 2.1kg / m, dust removal ash 1.2kg / m, blast furnace dust ash wet ratio 2%, The wet ratio of coke powder is 4.5%, the calculated value of fixed carbon in the mixture is 2.87%, the speed of the sintering machine is 1.52m / min, the thickness of the material layer is 695mm, and the sintering end point is 316°C.

[0049] The results show that sinter FeO: 7.54%. Compared with the comparative example, the stability rate of sinter FeO increases by 7.61%, the drum strength increases by 2.85%, and the solid fuel consumption of sinter decreases by 5.42kg.

Embodiment 3

[0051] The material structure and operation of the sintering machine are as follows: new material 39.3kg / m, cold return ore 21.5kg / m, hot return ore controlled at 2.3kg / m, dust removal ash 1.2kg / m, blast furnace dust ash wet ratio 3%, The wet ratio of coke powder is 4.58%, the calculated value of fixed carbon in the mixture is 2.85%, the speed of the sintering machine is 1.61m / min, the thickness of the material layer is 693mm, and the sintering end point is 321°C.

[0052] The results show that sinter FeO: 7.56%; compared with the comparative example, the stability rate of sinter FeO increases by 9.71%, the drum strength increases by 2.97%, and the solid fuel consumption of sinter decreases by 7.97kg.

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Abstract

The invention provides a method for controlling the ferrous oxide (FeO) content in a sintering ore. In the method, the sintering ore comprises the following raw materials: titanium-containing iron ore powder, fuel, a flux and blast furnace dust; and a value in formula 1 is controlled within 2.8wt%-2.9wt% so as to control the ferrous oxide content in the sintering ore within 7.2wt%-8.2wt%, wherein, the formula 1 is as follows: (FC) mixture=[Wfuel*(1-Afuel-Vfuel-Sfuel-Hfuel)+R(blast furnace dust)*Wnew material*C(blast furnace dust)] / Wmixture*100%. The method of the invention can control the FeOcontent in the sintering ore accurately and stably to obtain the sintering ore with excellent reducibility and intensity, thus further promoting iron increase and coke reduction during the blast-furnace smelting process, lowering the iron-making cost, reducing the coke powder usage during the sintering process, lowering the solid fuel consumption and saving the cost while realizing recovery and reuse of the blast furnace dust.

Description

technical field [0001] The invention relates to the field of preparation of ironmaking sintered ore, more specifically, relates to a method for controlling the content of ferrous oxide in the sintered ore by controlling the fixed carbon content in the sintered raw material. Background technique [0002] Sinter is the main raw material for blast furnace ironmaking, and its quality plays a very important role in blast furnace production. Generally speaking, sintered ore is a porous aggregate sintered by many minerals. It is dried (evaporated water), preheated (decomposed crystal water and carbonate), fuel combustion (oxidation-reduction reaction occurs) reaction with solid phase), melting (generation of low-melting liquid phase) and condensation (crystallization of iron ore and binder phase), among which the mixture consists of iron ore powder, fuel, flux and a certain amount of water mixed. [0003] Ferrous oxide (FeO) is an important component of sinter, and it is a compre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02
Inventor 何木光何斌李程
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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