Blast furnace smelting method for quickly acquiring stable indexes through ordinary ore and schreyerite interchange

A stable index, blast furnace smelting technology, applied in the field of blast furnace smelting, can solve the problems of low accuracy, complexity, time-consuming, etc., and achieve the effect of simple method and accurate index calculation quantity

Active Publication Date: 2020-05-05
WUKUN STEEL +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the invention of the present invention is to: aim at the above existing problems, provide a blast furnace smelting method for quickly obtaining stable indicators through mining and vanadium-titanium ore exchange, obtain blast furnace parameters automatically or manually, and automatically complete various calculation systems through multiple calculation systems Calculate the correlation process and precisely control the process of batching balance, composition index prediction, material feeding into the furnace, smelting param...

Method used

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  • Blast furnace smelting method for quickly acquiring stable indexes through ordinary ore and schreyerite interchange
  • Blast furnace smelting method for quickly acquiring stable indexes through ordinary ore and schreyerite interchange
  • Blast furnace smelting method for quickly acquiring stable indexes through ordinary ore and schreyerite interchange

Examples

Experimental program
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Effect test

Embodiment 1

[0091]Step (1), after the blast furnace is overhauled and the output reaches the standard, the smelting of titanium slag in the vanadium-titanium ore is resumed, and the materials used for the furnace are ordinary ore (including sinter, self-produced high-silica acidic oxidizing pellets and conventional low-silicon blocks) ore), and the charge structure of vanadium-titanium ore (including sinter, high-titanium pellets, and high-silicon lump ore) after changing the material.

[0092] Before the material change: the chemical composition of the sinter is: Fe is 52.36%, SiO 2 6.10%, CaO 12.95%, Al 2 O 3 2.05%, MgO 2.45%, TiO 2 is 0.46%, S is 0.045%, and the bulk density is 1.88t / m 3 ; Among them, the chemical composition of self-produced high siliceous acid oxidizing pellets is: Fe is 59.80%, SiO 2 9.50%, CaO 0.76%, Al 2 O 3 2.09%, MgO 0.77%, TiO 2 is 0.987%, and the bulk density is 2.50t / m 3 ; The chemical composition of low silicon lump ore is: Fe is 53.73%, SiO 2 4.00%...

Embodiment 2

[0155] The calculation formula and process of the following steps are the same as those in Example 1.

[0156] Step (1), the blast furnace is planned to have a long-term off-air maintenance, and the titanium slag smelting in the vanadium-titanium ore is converted into ordinary ore smelting, and the titanium slag smelting charge structure in the vanadium-titanium ore is sinter, high-titanium pellets, high-silicon lump ore; After the material change, the structure of ordinary ore charge is sinter, high-titanium pellet, and high-silicon lump ore;

[0157] Before the material change: the chemical composition of the sinter is: Fe is 52.86%, SiO 2 5.80%, CaO 12.10%, Al 2 O 3 1.98%, MgO 2.35%, TiO 2 is 0.37%, S is 0.040%, and the bulk density is 1.87t / m 3 ; The chemical composition of high titanium pellets is: Fe is 54.01%, SiO 2 4.26%, CaO 1.23%, Al 2 O 3 1.89%, MgO 1.45%, TiO 2 is 10.565%%, and the bulk density is 2.31t / m 3 ; The chemical composition of high silicon lump o...

Embodiment 3

[0191] The calculation formula and process of the following steps are the same as in Example 1.

[0192] Step (1), in the normal smelting process, it is calculated and converted to vanadium-titanium ore medium-titanium slag smelting with better economic efficiency under the current conditions. Materials used before changing materials: sintered ore, self-produced high silicic acid oxidizing pellets , Conventional low-silicon lump ore, after changing the material, it is a vanadium-titanium ore charge structure (including sinter, high-titanium pellets, and high-silicon lump ore);

[0193] Before material change: the chemical composition of the sintered ore is: Fe is 51.66%, SiO 2 6.19%, CaO 12.76%, Al 2 o 3 2.15%, MgO 2.46%, TiO 2 is 0.78%, S is 0.038%, and the bulk specific gravity is 1.85t / m 3 ; The chemical composition of self-produced high silicic acidic oxidizing pellets is: Fe is 58.5%, SiO 2 9.596%, CaO 0.80%, Al 2 o 3 2.20%, MgO 0.76%, TiO 2 1.076%, pile specific ...

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Abstract

The invention discloses a blast furnace smelting method for quickly acquiring stable indexes through interchange ordinary ore and schreyerite. According to the blast furnace smelting method, in the material interchange process during one smelting cycle, the quantity of burned coke is calculated according to the well-timed in-furnace air quantity of a blast furnace, and the location where a new rawmaterial column accurately arrives is determined according to hour material batches under the conditions of specific smelting parameters; through combination with the specific blast furnace smeltingparameters, the influence of Si content and fuel ratio and change characteristics of smelting parameters of different mineral varieties are controlled, and the indexes such as proper smelting parameters, slag and iron compositions and the fuel ratio of an interchanged new mineral variety are realized accurately and stably. The problem that associated data such as smelting parameters, coke ratio, alkalinity balance, final slag compositions, pig iron composition control and the smelting cycle interact with each other during interchanging of ordinary ore and schreyerite in the smelting process issolved. The blast furnace smelting method guarantees that the stable smelting indexes are quickly acquired after interchanging of mineral varieties under the stable and smooth furnace conditions. Theblast furnace smelting method has the characteristics of being simple and quick and accurate in control.

Description

technical field [0001] The invention relates to the technical field of blast furnace smelting, in particular to a blast furnace smelting method for quickly obtaining stable indicators by exchanging common ore and vanadium-titanium ore. Background technique [0002] It is a complex system engineering to strengthen the blast furnace smelting process, run stably, and obtain increasingly improved technical and economic indicators under specific conditions. As far as the blast furnace operation technology is concerned, it is necessary to find the direct smelting parameters and related parameters suitable for the specific raw material and fuel conditions, and to be able to predict the smelting results more accurately and continuously correct them, so as to obtain the conditions that are suitable for the conditions and have a relatively high quality. Good indicators of smelting results. The comprehensive composition and smelting parameters of ordinary ore and vanadium-titanium ore...

Claims

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Application Information

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IPC IPC(8): C21B5/00
CPCC21B5/006C21B5/008C21B2300/04
Inventor 林安川吴仕波刘宁斌胡兴康罗英杰王亚力夏海英葛居娜
Owner WUKUN STEEL
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