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Copper smelting converter tuyere brick and preparation method thereof

A copper-smelting converter and tuyere technology, which is applied in the field of refractory materials for copper-smelting converters, can solve problems such as reducing the volume stability of magnesia-alumina-titanium bricks, and achieve enhanced thermal shock resistance and volume stability, simple process, and slag corrosion resistance. strong effect

Active Publication Date: 2016-11-09
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But MgO, Al in magnesia-aluminum-titanium brick 2 o 3 and TiO 2 The solid solution reaction is accompanied by obvious volume effect, which greatly reduces the volume stability of magnesia-alumina-titanium bricks.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A copper smelting converter tuyere brick and a preparation method thereof. Use 60~62wt% fused magnesia chrome sand particles as aggregate, 15~17wt% fused magnesia fine powder, 14~16wt% Cr 7 C 3 Fine powder, 5~7wt% zirconia micropowder and 1~2wt% yttrium oxide micropowder are base materials; The base material is added to the aggregate and mixed evenly. Then add zirconia sol accounting for 8~9wt% of the sum of the base material and the aggregate, mix evenly, press and form, cure at 25~30°C for 12~24h, and dry at 110~120°C 12~18h. Finally, place it in a muffle furnace, raise the temperature to 1550-1570°C at a heating rate of 4-5°C / min, keep it warm for 2-3 hours, and cool down with the furnace to make a copper smelting converter tuyere brick.

[0034] The copper smelting converter tuyere brick prepared in this example is measured: the cold compressive strength is 90~92MPa; the line change after burning is 0.10~0.12%; the 1450℃×3h static crucible method slag resistance...

Embodiment 2

[0036] A copper smelting converter tuyere brick and a preparation method thereof. Use 61~63wt% fused magnesia chrome sand particles as aggregate, 16~18wt% fused magnesia fine powder, 13~15wt% Cr 7 C 3Fine powder, 5~7wt% zirconia micropowder and 1~2wt% yttrium oxide micropowder are base materials; The base material is added to the aggregate and mixed evenly. Then add zirconia sol accounting for 8~9wt% of the sum of the base material and the aggregate, mix evenly, press and form, cure at 25~30°C for 12~24h, and dry at 110~120°C 12~18h. Finally, place it in a muffle furnace, raise the temperature to 1550-1570°C at a heating rate of 4-5°C / min, keep it warm for 2-3 hours, and cool down with the furnace to make a copper smelting converter tuyere brick.

[0037] The copper smelting converter tuyere brick prepared in this example is measured: the cold compressive strength is 91~93MPa; the line change after burning is 0.09~0.11%; the 1450℃×3h static crucible method slag resistance ...

Embodiment 3

[0039] A copper smelting converter tuyere brick and a preparation method thereof. With 62~64wt% fused magnesia chrome sand particles as aggregate, 17~19wt% fused magnesia fine powder, 12~14wt% Cr 7 C 3 Fine powder, 4~6wt% zirconia micropowder and 2~3wt% yttrium oxide micropowder are base materials; The base material is added to the aggregate and mixed evenly. Then add zirconia sol accounting for 9~10wt% of the sum of the base material and the aggregate, mix evenly, press and form, cure at 25~30°C for 12~24h, and dry at 110~120°C 12~18h. Finally, place it in a muffle furnace, raise the temperature to 1560-1580°C at a heating rate of 4-5°C / min, keep it warm for 2-3 hours, and cool down with the furnace to make a copper smelting converter tuyere brick.

[0040] The copper smelting converter tuyere brick prepared in this example is measured: the cold compressive strength is 92~94MPa; the line change after burning is 0.08~0.10%; the 1450℃×3h static crucible method slag resistan...

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Abstract

The invention relates to a copper smelting converter tuyere brick and a preparation method thereof. According to the technical scheme, 60-65wt% of fused magnesite chrome particles serve as aggregate, and 15-20wt% of fused magnesite fine powder, 11-16wt% of Cr7C3 fine powder, 4-7wt% of zirconia micro powder and 1-3wt% of yttria micro powder serve as matrix materials; the matrix materials are evenly mixed according to the contents of the aggregate and the matrix materials and then added into the aggregate, and the matrix materials and the aggregate are evenly mixed; then, zirconia sol accounting for 8-10wt% of the sum of the matrix materials and the aggregate is added and evenly mixed, forming is carried out, and the mixture is cured for 12-24 h at 25-30 DEG C and dried for 12-18 h at 110-120 DEG C; finally, the mixture is put into a muffle and heated to 1550-1580 DEG C at the heating rate of 4-5 DEG C / min, heat preservation is carried out for 2-3 h, furnace cooling is carried out, and the copper smelting converter tuyere brick is obtained. The process is simple; the prepared copper smelting converter tuyere brick is large in strength, high in slag corrosion resistance, excellent in thermal shock resistance and good in volume stability.

Description

technical field [0001] The invention belongs to the technical field of refractories for copper smelting converters. Specifically relates to a copper smelting converter tuyere brick and a preparation method thereof. Background technique [0002] The copper smelting converter is an important smelting equipment in the matte blowing process. When blasting air into the molten matte in the converter for blowing, FeS is preferentially oxidized to FeO, and reacts with the added quartz to enter the slag; then continue to blast, Cu 2 The sulfur in S oxidizes into the flue gas to obtain blister copper containing 98-99% copper. [0003] Converter copper smelting is an intermittent operation, and the temperature in the furnace fluctuates greatly (600~1450°C). Especially the refractory material in the tuyere area is the weak link of the copper smelting converter. peeled off and damaged. Therefore, strict requirements are put forward for the refractory materials in the tuyere area of ​...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/622
CPCC04B35/0435C04B35/622C04B2235/3225C04B2235/3244C04B2235/3839C04B2235/96
Inventor 张寒赵惠忠程水明赵鹏达余俊梁永和
Owner WUHAN UNIV OF SCI & TECH
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