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Quantitative modularized method for accurately controlling blow-in, banking and blow-out of blast furnace

A precise control and blast furnace technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve problems such as complex calculation process of starting furnace ingredients, cumbersome calculation methods, whether the furnace is successfully started and the impact on subsequent production, and achieves small errors and simple methods , precise effect

Active Publication Date: 2015-01-28
红河钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, the calculation process of starting the furnace is complicated, and it is necessary to ensure that the calculation results of sinter, pellets, lump ore, limestone, dolomite and even silica are accurate under different conditions, and the composition of the primary iron slag is reasonable and the heat is sufficient. Otherwise, the It will have a serious impact on the success of the furnace opening and subsequent production; the furnace closure also involves complex calculations of various materials and operating parameters
The traditional calculation method is relatively cumbersome, and the actual fuel conditions and production conditions in the Central Plains may change temporarily, which requires timely, efficient and accurate calculation

Method used

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  • Quantitative modularized method for accurately controlling blow-in, banking and blow-out of blast furnace
  • Quantitative modularized method for accurately controlling blow-in, banking and blow-out of blast furnace
  • Quantitative modularized method for accurately controlling blow-in, banking and blow-out of blast furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] A. 450m 3 The first-level blast furnace is overhauled and started, and the materials used for the furnace include ore (including sinter, pellets and lump ore), coke and flux (including limestone, dolomite and silica).

[0084] Among them, the chemical composition of sinter is: TFe 50%, SiO 2 7.35%, CaO 13.25%, Al 2 o 3 2.10%, MgO 2.35%, TiO 2 0.95%, S 0.08%; stack specific gravity 1.90t / m 3 .

[0085] The chemical composition of the pellets is: TFe 57.5%, SiO 2 9.8%, CaO 0.55%, Al 2 o 3 1.59%, MgO 0.58%, TiO 2 0.81%; stack specific gravity 2.45t / m 3 .

[0086] The chemical composition of the lump ore is: TFe 54.5%, SiO 2 5.58%, CaO 0.25%, Al 2 o 3 0.65%, MgO 0.57%, TiO 2 0.15%; stack specific gravity 2.25t / m3 .

[0087] The coke composition is: C 83.7%, Ash 14.35%, bulk specific gravity 0.65t / m 3 .

[0088] The chemical composition of limestone is: CaO 53.5%; Al 2 O 3 <0.50.

[0089] The chemical composition of dolomite is: MgO 32.6%, CaO 18...

Embodiment 2

[0118] The calculation formula and process of the following steps are the same as those in Example 1.

[0119] A. 1350m 3 The high-grade blast furnace is overhauled and started, and the starting materials include ore (including sinter, pellets and lump ore), coke and flux (including limestone, dolomite and silica).

[0120] The chemical composition of sinter is: TFe 51.54%, SiO 2 7.05%, CaO 13.05%, Al 2 O 3 2.00%, MgO 2.35%, TiO 2 0.95%, S 0.08%; bulk density 1.95t / m 3 .

[0121] The chemical composition of the pellets is: TFe 58.5%, SiO 2 9.6%, CaO 0.55%, Al 2 O 3 1.39%, MgO 0.53%, TiO 2 0.71%; bulk density 2.55t / m 3 .

[0122] The chemical composition of the lump ore is: TFe 54.5%, SiO 2 5.58%, CaO 0.25%, Al 2 O 3 0.65%, MgO 0.57%, TiO 2 0.15%; bulk density 2.25t / m 3 .

[0123] Among them, the coke composition is: C 84.7%, Ash 13.65%, bulk specific gravity 0.65t / m 3 . .

[0124] The chemical composition of limestone is: CaO 53.5%; Al 2 O 3 <0.5...

Embodiment 3

[0138] The calculation formula and process of the following steps are the same as in Example 1.

[0139] A. 450m 3 The empty material line of the first-level blast furnace is shut down, and the materials used for the shutdown include ore (including sinter, pellets and lump ore), coke and flux.

[0140] Among them, the chemical composition of sinter is: TFe 50%, SiO 2 7.35%, CaO 13.25%, Al 2 o 3 2.10%, MgO 2.35%, TiO 2 0.95%, S 0.08%; stack specific gravity 1.90t / m 3 .

[0141] The chemical composition of the pellets is: TFe 57.5%, SiO 2 9.8%, CaO 0.55%, Al 2 o 3 1.59%, MgO 0.58%, TiO 2 0.81%; stack specific gravity 2.45t / m 3 .

[0142] The chemical composition of the lump ore is: TFe 54.5%, SiO 2 5.58%, CaO 0.25%, Al 2 o 3 0.65%, MgO 0.57%, TiO 2 0.15%; stack specific gravity 2.25t / m 3 .

[0143] Among them, the coke composition is: C 83.7%, Ash 14.35%, and the heap specific gravity is 0.65t / m 3 .

[0144] B. Based on the volume of the blast furnace...

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Abstract

The invention discloses a quantitative modularized method for accurately controlling blow-in, banking and blow-out of a blast furnace. The blow-in method comprises the following steps: burdening, feeding calculation, charging for the blast furnace, adjustment of charging, feed-in calculation and blow-in control. The banking method comprises the following steps: canceling limestone, dolomite and silica in claims 1 to 6, adjusting a total coke ratio and a total alkalinity according to the banking time, stably descending furnace burden, and when the calculated furnace burden is fed into the furnace, and the burden line is about 6 cm of the stock level, damping down so as to finish banking. The blow-out method comprises the following steps: after furnace burden feeding is stopped, calculating the burning coke quantity based on feed-in air quantity of the blast furnace, when the volume vacated in the furnace is up to the predetermined cleared amount, combining with outer furnace observation and determination, and damping down so as to finish blow-out. The quantitative modularized method is based on the principles of local material balance of each part in the blast furnace, full-furnace material balance and thermal balance, solves the problems that the associated data such as the total coke ratio, the alkalinity balance at the filled part, final slag constituents, cast iron composition control, empty burden batches and normal burden batches are processed in an interacted manner, and has the characteristics of simplicity in method, and quickness and accuracy in control.

Description

technical field [0001] The invention belongs to the technical field of blast furnace smelting, and relates to a method for precisely controlling the opening, sealing, and stopping of a blast furnace, in particular to a new blast furnace, a blast furnace overhaul, a blast furnace start-up production after a medium repair, and a medium- and long-term sealing of a blast furnace using a filling method. Furnace and shut down the furnace with empty material line to improve the hit rate and stability rate of the target parameters obtained in the process of opening, closing and shutting down the blast furnace involving huge parameters and complex calculations, effectively improving the accuracy of opening, closing and shutting down of the blast furnace , immediacy and efficiency, and promote the operation methods of opening, sealing and stopping the furnace in a precise, modular and quantitative manner. Background technique [0002] The start-up, overhaul and intermediate repair sta...

Claims

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Application Information

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IPC IPC(8): C21B5/00
Inventor 林安川陈元富张涛
Owner 红河钢铁有限公司
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