Blast furnace smelting method for quickly obtaining stable indicators by exchanging ordinary ore with vanadium-titanium ore

A stable index and blast furnace smelting technology, applied in the field of blast furnace smelting, can solve problems such as low accuracy, time-consuming, and complexity, and achieve the effect of simple method, accurate index calculation quantity, and satisfying the changing trend and suitability of parameters

Active Publication Date: 2021-08-17
WUKUN STEEL +1
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  • Summary
  • 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 parameter adjustment range, time node and verification, so as to greatly improve the accuracy and immediacy of various data to be solved in complex processes , and meet the high adaptability when the condition (data) changes temporarily, and form the closed-loop and correction of multiple related calculation systems such as batching, smelting parameters, index prediction, etc., to solve the traditional complex, time-consuming, and low-accuracy empirical Or the defects brought by the traditional multivariate simultaneous equations calculation ideas and models

Method used

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  • Blast furnace smelting method for quickly obtaining stable indicators by exchanging ordinary ore with vanadium-titanium ore
  • Blast furnace smelting method for quickly obtaining stable indicators by exchanging ordinary ore with vanadium-titanium ore
  • Blast furnace smelting method for quickly obtaining stable indicators by exchanging ordinary ore with vanadium-titanium ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091]Step (1), after the blast furnace is overhauled and opened to meet production standards, the smelting of titanium slag in vanadium-titanium ore is resumed, and the materials for starting the furnace are ordinary ore (including sintered ore, self-produced high-silicic acid oxidizing pellets and conventional low-silicon blocks ore), and after the material change, it is a vanadium-titanium ore charge structure (including sinter, high-titanium pellets, and high-silicon lump ore).

[0092] Before material change: the chemical composition of the sintered ore 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 specific gravity is 1.88t / m 3 ; Among them, the chemical composition of self-produced high silicic 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 It is 0.987%, and the heap specific gravity is 2.50t / m 3 ; The chemical composition of low-silicon lump ore i...

Embodiment 2

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

[0156] Step (1), the blast furnace is planned to be closed for long-term maintenance, and the smelting of titanium slag in vanadium-titanium ore is converted to ordinary ore smelting. The furnace charge structure for smelting titanium slag in vanadium-titanium ore is sintered ore, high-titanium pellets, and high-silicon lump ore; After the material change, the structure of the common ore charge is sintered ore, high-titanium pellets, and high-silicon lump ore;

[0157] Before material change: the chemical composition of the sintered ore 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 specific gravity 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 It is 10.565%, and the specific gravity of the pile is 2.31t / m 3 ; The c...

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 obtaining stable indicators by exchanging ordinary ore with vanadium-titanium ore. It involves calculating the amount of burning coke according to the timely air volume of the blast furnace during the refueling process in a smelting cycle, and then obtaining the specific The hourly material batch under the conditions of smelting parameters is used to determine the accurate arrival position of the new raw material column, and combined with the influence of specific blast furnace smelting parameters on [Si], the influence of fuel ratio and the change characteristics of smelting parameters of different minerals, it is accurate and stable The suitable smelting parameters, slag-iron composition, fuel ratio and other indicators of the new ore after transformation can be achieved. The invention solves the problems of smelting parameters, coke ratio, alkalinity balance, final The processing of interrelated data such as slag composition, pig iron composition control, and smelting cycle, and the method of quickly obtaining stable smelting indicators after the change of ore types under the condition of ensuring a stable furnace condition, has the characteristics of simple method, fast control and accuracy .

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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Patent Type & AuthorityPatents(China)
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
OwnerWUKUN STEEL