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Iron runner casting material for blast furnace for smelting vanadium titanium ore and preparation method thereof

A technology for tap ditch and vanadium-titanium ore is applied in the field of tap ditch castables for smelting vanadium-titanium ore and its preparation, and can solve the problems of low superheat in blast furnace smelting, affecting the service life of iron ditch, increasing production costs, and the like, Achieve the effect of low water addition, reduced porosity and improved performance

Inactive Publication Date: 2013-11-13
WUHAN WINNING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The melting temperature of titanium-containing blast furnace slag is high, and the superheat degree of blast furnace smelting is low. However, the slag contains more minerals with high melting point and easy crystallization. Titanium slag is easy to adhere to the refractory material of the main trench, and if it is not cleaned in time, the slag and iron adhered to the refractory material of the iron trench will accumulate and thicken, seriously affecting the normal production of iron.
When cleaning the slag adhering to the castable surface of the iron trough, it is easy to damage the castable, which affects the service life of the iron trough and increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A casting material for a blast furnace for smelting vanadium-titanium ore and a preparation method thereof, the specific steps of which are:

[0051] One, the blast furnace of described smelting vanadium-titanium ore is used the raw material and content thereof of tap channel castable (hereinafter referred to as "castable"):

[0052] Fused brown corundum with a particle size of 8~5mm is 15~18wt%;

[0053] Fused brown corundum with a particle size of 5~3mm is 18~20 wt%;

[0054]Fused brown corundum with a particle size of 3-1mm is 24-25 wt%;

[0055] Silicon carbide with a particle size of 0.088~1mm is 10~11 wt%;

[0056] Silicon carbide with particle size ≤0.088mm is 13~15 wt%;

[0057] Ball pitch is 2~3 wt%;

[0058] Silica powder is 1 ~ 2wt%;

[0059] Activated alumina micropowder is 5~6wt%;

[0060] Silica powder is 2~3 wt%;

[0061] CA-70 cement is 5 ~ 6wt%.

[0062] The following are the admixtures used in the preparation of castables:

[0063] Metal alumi...

Embodiment 2

[0071] A casting material for a blast furnace for smelting vanadium-titanium ore and a preparation method thereof, the specific steps of which are:

[0072] One, the blast furnace of described smelting vanadium-titanium ore is used the raw material and content thereof of tap channel castable (hereinafter referred to as "castable"):

[0073] Fused brown corundum with a particle size of 8~5mm is 18~22wt%;

[0074] Fused brown corundum with a particle size of 5~3mm is 16~18 wt%;

[0075] Fused brown corundum with a particle size of 3-1mm is 22-24 wt%;

[0076] Silicon carbide with a particle size of 0.088~1mm is 11~13 wt%;

[0077] Silicon carbide with particle size ≤0.088mm is 11~13 wt%;

[0078] Ball pitch is 3~4 wt%;

[0079] Silica powder is 2 ~ 3wt%;

[0080] Activated alumina micropowder is 4~5wt%;

[0081] Silica powder is 3~4 wt%;

[0082] CA-70 cement is 4~5wt%.

[0083] The following are the admixtures used in the preparation of castables:

[0084] Metal alumin...

Embodiment 3

[0092] A casting material for a blast furnace for smelting vanadium-titanium ore and a preparation method thereof, the specific steps of which are:

[0093] One, the blast furnace of described smelting vanadium-titanium ore is used the raw material and content thereof of tap channel castable (hereinafter referred to as "castable"):

[0094] Fused brown corundum with a particle size of 8~5mm is 22~25wt%;

[0095] Fused brown corundum with a particle size of 5~3mm is 15~16 wt%;

[0096] Fused brown corundum with a particle size of 3-1mm is 20-22 wt%;

[0097] Silicon carbide with a particle size of 0.088~1mm is 13~15 wt%;

[0098] Silicon carbide with particle size ≤0.088mm is 10~11 wt%;

[0099] Ball pitch is 4~5 wt%;

[0100] Silica fine powder is 3 ~ 4wt%;

[0101] Activated alumina micropowder is 3~4wt%;

[0102] Silica powder is 4~5 wt%;

[0103] CA-70 cement is 3 ~ 4wt%.

[0104] The following are the admixtures used in the preparation of castables:

[0105] Metal...

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Abstract

The invention relates to an iron runner casting material for a blast furnace for smelting a vanadium titanium ore and a preparation method thereof. The method comprises the following steps of: firstly placing 1-4wt% of silicon dioxide micro-powder, 3-6wt% of active aluminum oxide micro-powder and 2-5wt% of silicon micro-powder in a conical stirring machine, externally adding metal aluminum powder accounting for 0.04-0.06wt% of raw materials and polycarboxylic acid type water reducer accounting for 0.3-0.5wt% of the raw materials, and stirring for 20-30min to prepare a premix; further stirring the premix, 10-150wt% of silicon carbide with the particle size of 0.088-1mm, 10-150wt% of silicon carbide with the particle size of not more than 0.088mm, 3-6wt% of CA-70 cement, 2-5wt% of ball asphalt and 50-70wt% of fused brown corundum particles by using a planetary stirring machine for 8-12min; and further preparing the iron runner casting material for the blast furnace for smelting the vanadium titanium ore. The graduation of the fused brown corundum particles is as follows: 8-5mm: 15-25wt%; 5-3mm: 15-20wt%; and 3-1mm: 20-25wt%. The iron runner casting material disclosed by the invention has the advantages of good scouring resistance, oxidation resistance, erosion resistance and thermal shock resistance, no slag adhesion, long service life and high one-time iron capacity.

Description

technical field [0001] The invention belongs to the technical field of tap trough castables. In particular, it relates to a castable castable for a blast furnace for smelting vanadium-titanium ore and a preparation method thereof. Background technique [0002] In the process of smelting vanadium-titanium magnetite, due to the low ore grade, the iron content is less than 50%, and the amount of slag and iron in front of the furnace is large, about 700 kg of slag is produced per ton of iron, which is much higher than the amount of slag smelted by ordinary ore blast furnaces. Moreover, the erosion of castables by titanium-containing blast furnace slag is also more serious than that of ordinary blast furnace slag. The melting temperature of titanium-containing blast furnace slag is high, and the superheat degree of blast furnace smelting is low. However, the slag contains more minerals with high melting point and easy crystallization. Titanium slag is easy to adhere to the refr...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 苏伯平李新健全坤朋
Owner WUHAN WINNING TECH
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