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Anhydrous stemming for blast-furnace tapping hole

An anhydrous taphole and tap hole technology, applied in the field of refractory materials, can solve the problem of difficult to deal with long-term slag and iron scouring, and achieve the effect of good air permeability and stable volume

Inactive Publication Date: 2011-02-09
HUNAN XIANGGANG RUITAI TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the opening is opened immediately after only about 30 minutes of sintering, the strength will not increase, and it will be difficult to cope with the erosion of slag and iron for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Take the raw materials according to the following ratio:

[0030] Coke 2~0㎜ 16%

[0031] Super high aluminum material 3~1㎜ 10%

[0032] Super high aluminum material 1~0㎜ 5%

[0033] Brown corundum ≤0.088㎜ 5%

[0034] Silicon carbide (90#) 1~0㎜ 10%

[0035] Silicon carbide (90#) ≤0.088㎜ 10%

[0036] Guangxi clay ≤0.088㎜ 16%

[0037] High temperature asphalt ≤0.088㎜ 8%

[0038] Sericite ≤0.088㎜ 10%

[0039] Refined quartz sand 40-70 mesh 10%

[0040] Resin (liquid) 3%

[0041] Tar (mixture of tar and anthracene oil) specific gravity 1.15~1.16 13%

[0042] (2) Weigh the above solid powder according to the proportion, then pour it into the heating mixer and dry mix it for 5 minutes, then add the liquid binder (add resin first, then tar or mixed oil), and mix and grind for 40 minutes. Minutes, then take the mud to make the Masha value, if the Masha value is higher than 1MPa, then increase the oil appropriately until the Masha value drops below 1MPa, then discharg...

Embodiment 2

[0044] (1) Take the raw materials according to the following ratio:

[0045] Coke 2~0㎜ 16%

[0046] Super high aluminum material 3~1㎜ 10%

[0047] Brown corundum 1~0㎜ 5%

[0048] Brown corundum ≤0.088㎜ 5%

[0049] Silicon carbide (90#) 1~0㎜ 10%

[0050] Silicon carbide (90#) ≤0.088㎜ 10%

[0051] Guangxi clay ≤0.088㎜ 16%

[0052] High temperature asphalt ≤0.088㎜ 8%

[0053] Sericite ≤0.088㎜ 10%

[0054] Refined quartz sand 40-70 mesh 10%

[0055] Resin (liquid) 3%

[0056] Tar (mixture of tar and anthracene oil) specific gravity 1.15~1.16 13%

[0057] (2) Weigh the above solid powder according to the proportion, then pour it into the heating mixer and dry mix it for 5 minutes, then add the liquid binder (add resin first, then tar or mixed oil), and mix and grind for 40 minutes. Minutes (rotation speed is 14 rev / min), then take the mud material to make the Masha value, if the Masha value is higher than 1MPa, then increase the oil appropriately until the Masha value dro...

Embodiment 3

[0059] (1) Take the raw materials according to the following ratio:

[0060] Coke 2~0㎜ 16%

[0061] Brown corundum 3~1㎜ 10%

[0062] Brown corundum 1~0㎜ 5%

[0063] Brown corundum ≤0.088㎜ 5%

[0064] Silicon carbide (90#) 1~0㎜ 10%

[0065] Silicon carbide (94#) ≤0.088㎜ 10%

[0066] Guangxi clay ≤0.088㎜ 16%

[0067] High temperature asphalt ≤0.088㎜ 8%

[0068] Sericite ≤0.088㎜ 10%

[0069] Refined quartz sand 40-70 mesh 10%

[0070] Resin (liquid) 3%

[0071] Tar (mixture of tar and anthracene oil) specific gravity 1.15~1.16 12%

[0072] (2) Weigh the above solid powder according to the proportion, then pour it into the heating mixer and dry mix it for 5 minutes, then add the liquid binder (add resin first, then tar or mixed oil), and mix and grind for 40 minutes. Minutes, then take the mud to make the Masha value, if the Masha value is higher than 1MPa, then increase the oil appropriately until the Masha value drops below 1MPa, then discharge the material, squeeze th...

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PUM

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Abstract

The invention discloses an anhydrous stemming for a blast-furnace tapping hole. Tar oil with specific weight of 1.15-1.16 or mixed oil of tar oil and anthracene oil is used as a binding agent, more than 50% of coarse and middle particles are added into a particle composition of the formulation, the content of fine powder with the particle size not more than 0.088 mm is controlled below 50%, a great amount of sericite is added into the formulation, and 40-70 mesh refined quartz sand is added. The stemming has good air permeability and rapid sintering performance and can be rapidly hardened within 20-30 min, the gas can be exhausted through ventilation holes, the strength of the stemming can be rapidly increased within short time and can satisfy about 30 min continuous opening tapping of single tapping holes of large and medium blast furnaces.

Description

Technical field [0001] The invention belongs to refractory materials, in particular to a formula of anhydrous taphole mud suitable for tapholes of large and medium-sized blast furnaces in steelworks and a production process thereof. Background technique [0002] At present, large and medium-sized blast furnaces in steelmaking plants have 2 to 4 tapholes (also known as tapholes), and generally the two tapholes tap iron alternately. However, in some special cases (such as the failure of a certain taphole mud gun or tapping machine, the need for pouring or overhaul of the tap trough, and other situations) it is necessary or only possible to use a single taphole for continuous tapping instead of Multiple tapholes can alternately tap iron, so the performance of the taphole clay required in this case is completely different from that required for multiple tapholes to tap iron alternately. When continuous tapping of single tap hole, the tap interval time of the same tap hole is ob...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 陆晓峰章兴高姚建材吕建江刘利华
Owner HUNAN XIANGGANG RUITAI TECH
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