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CN-121976033-A - Method for predicting drum strength of vanadium-titanium sinter

CN121976033ACN 121976033 ACN121976033 ACN 121976033ACN-121976033-A

Abstract

The invention provides a method for predicting the drum strength of vanadium-titanium sinter, which predicts the drum strength of vanadium-titanium sinter by three components of TiO 2 、SiO 2 and CaO in vanadium-titanium sinter mixture, and predicts the drum strength of vanadium-titanium sinter by adding the interaction of TiO 2 、SiO 2 and CaO in the prediction, fully considers the interaction of TiO 2 and R and the influence of SiO 2 +CaO on the drum strength of vanadium-titanium sinter, and ensures that the prediction is more comprehensive, scientific and accurate.

Inventors

  • JIANG SHENG
  • ZHANG LILI
  • LING XINKE
  • Pu Shuiqiang

Assignees

  • 攀钢集团攀枝花钢铁研究院有限公司

Dates

Publication Date
20260505
Application Date
20260210

Claims (10)

  1. 1. A method for predicting drum strength of vanadium-titanium sinter is characterized in that the content W TiO2 of TiO 2 in the sinter, the alkalinity R of the sinter, the mass fraction W CaO+SiO2 of CaO+SiO 2 in the sinter and the sinter layer thickness Hmm are obtained through calculation according to sintering proportioning parameters; wherein, when the W TiO2 percent is less than or equal to 2.5 percent and less than or equal to 7.5 percent and the W TiO2 percent is less than or equal to 5.0 percent and less than or equal to 7.5 percent, Drum strength of vanadium-titanium sinter =0.8618×（W TiO2 ） 0.087 +0.5561×R 0.171 +TiO 2 ×R×10 -2 +(H 2 ×10 -6 +0.001873×H)+（(W CaO+SiO2 ) 2 ×10 -4 +0.1531×(W CaO+SiO2 )）+69; When the W TiO2 percent is less than or equal to 2.5 percent and less than 5.0 percent, Drum strength of vanadium-titanium sinter =1.944×W TiO2 +0.5561×R 0.171 + W TiO2 ×R×10 -2 +(H 2 ×10 -6 +0.001873×H)+((W CaO+SiO2 ) 2 ×10 -4 +0.1531×(W CaO+SiO2 ))+80.5.
  2. 2. The method for predicting the drum strength of vanadium-titanium sinter as recited in claim 1, wherein the basicity R of the sinter is a ratio of the mass fraction of CaO to the mass fraction of SiO 2 in the sinter, and R is 1.6-2.5.
  3. 3. The method for predicting the drum strength of vanadium-titanium sinter as recited in claim 1, wherein the sinter bed thickness H is the layer thickness of the sinter in the sintering device during sintering, and H is 600mm or less and 900mm or less.
  4. 4. The method for predicting the drum strength of a vanadium-titanium sinter of claim 1 wherein W CaO+SiO2 % to 23%.
  5. 5. The method for predicting the drum strength of vanadium-titanium sinter as recited in claim 1, wherein the mass fraction of FeO in the sinter is 7.2-8.8%.
  6. 6. The method for predicting drum strength of vanadium-titanium sinter as recited in claim 1, wherein the TFe in the sinter is 47-52%.
  7. 7. The method for predicting drum strength of vanadium-titanium sinter as recited in claim 1, wherein the mass content of moisture in the mixture of the sintering ingredients is 7.0-8.0%.
  8. 8. The method for predicting drum strength of vanadium-titanium sinter as recited in claim 7, wherein the temperature of the mixture is 50-70 ℃.
  9. 9. The method for predicting drum strength of vanadium-titanium sinter as recited in claim 1, wherein the sinter batch comprises iron concentrate with the following mass fractions: 10-70% of vanadium-titanium-iron concentrate, 20-60% Of high-grade iron concentrate, 5-30% Of medium grade iron concentrate.
  10. 10. The method for predicting the drum strength of the vanadium-titanium agglomerate according to claim 9, wherein the mass fraction of TiO 2 in the vanadium-titanium-iron concentrate is 8-13%, and the TFe in the vanadium-titanium-iron concentrate is 53-60%; TFe in the high-grade iron concentrate is 55-65%; TFe in the medium-grade iron ore concentrate is 40-50%.

Description

Method for predicting drum strength of vanadium-titanium sinter Technical Field The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a method for predicting drum strength of vanadium-titanium sinter. Background The quality of the sinter directly affects the stable and smooth running of the blast furnace, the sinter production process needs to obtain the finished sinter by mixing different kinds of iron concentrates through calculation proportion and sintering, then sampling and grading are carried out, and the manual detection of the drum strength of the sinter is adopted. The method is characterized in that the method comprises the following steps of researching and applying a combined model-based sinter quality prediction system of the university of Wuhan science and technology Shao Huijun, summarizing main factors influencing the quality of the sinter on the basis of analyzing the sintering process mechanism and the characteristics thereof, establishing a sinter quality prediction model, and better predicting indexes such as the strength of the sinter on the basis of an improved sinter drum strength prediction model of a Transformer network and a system thereof, wherein on one hand, the required parameters are more and more, and on the other hand, the models are aiming at the sintering without TiO 2, tiO 2 in raw materials is subjected to complex reaction in the sintering process, ilmenite in vanadium ore is difficult to fully react with fluxes (such as limestone and siliceous materials) to generate a material phase, so that the quality of the sinter is unstable and has large change. Therefore, it is important to quickly and accurately predict the drum strength of the sinter, and to provide support for the blast furnace production operation. Disclosure of Invention The invention aims to provide a method for predicting the drum strength of vanadium-titanium sinter, which fully considers the interaction influence of TiO 2 and R and the influence of SiO 2 +CaO on the drum strength of vanadium-titanium sinter, so that the prediction is more comprehensive, scientific and accurate. The application provides a method for predicting drum strength of vanadium-titanium sinter, which comprises the steps of calculating according to sintering proportioning parameters to obtain content W TiO2 of TiO 2 in the sinter, alkalinity R of the sinter, mass fraction W CaO+SiO2 of CaO+SiO 2 in the sinter and sinter layer thickness Hmm; wherein, when the W TiO2 percent is less than or equal to 2.5 percent and less than or equal to 7.5 percent and the W TiO2 percent is less than or equal to 5.0 percent and less than or equal to 7.5 percent, Drum strength of vanadium-titanium sinter =0.8618×（WTiO2）0.087+0.5561×R0.171+TiO2×R×10-2+(H2×10-6+0.001873×H)+（(WCaO+SiO2)2×10-4+0.1531×(WCaO+SiO2)）+69; When the W TiO2 percent is less than or equal to 2.5 percent and less than 5.0 percent, Drum strength of vanadium-titanium sinter =1.944×WTiO2+0.5561×R0.171+ WTiO2×R×10-2+(H2×10-6+0.001873×H)+((WCaO+SiO2)2×10-4+0.1531×(WCaO+SiO2))+80.5. Preferably, the alkalinity R of the sinter is the ratio of the mass fraction of CaO to the mass fraction of SiO 2 in the sinter, and R is more than or equal to 1.6 and less than or equal to 2.5. Preferably, the thickness Hmm of the sintering ore layer is the thickness of the sintering ore layer in the sintering device during sintering, and is more than or equal to 600mm and less than or equal to Hmm mm and less than or equal to 900mm. Preferably, the W CaO+SiO2% or less is 15% or less and 23% or less. Preferably, the mass fraction of FeO in the sinter is 7.2-8.8%. Preferably, the TFe in the sinter is 47-52%. Preferably, the mass content of the water in the mixed material of the sintering ingredients is 7.0-8.0%. Preferably, the temperature of the mixture is 50-70 ℃. Preferably, the sintering burden comprises the following iron concentrates in percentage by mass: 10-70% of vanadium-titanium-iron concentrate, 20-60% Of high-grade iron concentrate, 5-30% Of medium grade iron concentrate. Preferably, the mass fraction of TiO 2 in the vanadium-titanium-iron concentrate is 8-13%, and the TFe in the vanadium-titanium-iron concentrate is 53-60%; TFe in the high-grade iron concentrate is 55-65%; TFe in the medium-grade iron ore concentrate is 40-50%. The invention provides a method for predicting the drum strength of vanadium-titanium sinter, which is characterized in that the content W TiO2% of TiO 2 in the sinter, the alkalinity R of the sinter and the mass fraction W CaO+SiO2% of CaO+SiO 2 in the sinter are obtained according to sintering proportioning parameters, and the thickness H of a sinter layer, wherein the content W TiO2% is less than or equal to 2.5%, the content W TiO2% is less than or equal to 5.0%, the drum strength =0.8618×（WTiO2）0.087+0.5561×R0.171+TiO2×R×10-2+(H2×10-6+0.001873×H)+（(WCaO+SiO2)2×10-4+0.1531×(WCaO+SiO2)）+69; is less than or equal to 2.5%, the cont