Semi-rebonded magnesia-chrome brick for copper smelting furnace and its preparation method

A semi-recombination, copper smelting furnace technology, applied in the field of copper smelting furnace lining materials and its preparation, can solve the problems of easy deformation of the brick body, poor thermal shock stability, weak corrosion resistance, etc., and achieve high cost performance , Improve the thermal shock resistance stability, excellent effect of slag erosion resistance

Active Publication Date: 2014-10-01
宜兴新威利成耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The refractory lining used in traditional copper smelting furnaces mainly includes silica bricks, high alumina bricks, magnesia bricks, and magnesia chrome bricks. Due to the influence of chemical erosion and penetration, as well as sharp periodic temperature changes, the bricks are easily deformed; The directly bonded magnesia-chrome brick has excellent thermal shock stability, but its corrosion resistance is not strong; or the fused and combined magnesia-chrome brick has strong corrosion resistance, but its thermal shock stability is not good

Method used

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  • Semi-rebonded magnesia-chrome brick for copper smelting furnace and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Raw materials for semi-rebonded magnesia-chrome bricks for copper smelting furnaces are shown in Table 1:

[0021] Table 1 Raw materials contained in semi-rebonded magnesia-chrome bricks for copper smelting furnaces

[0022] raw material name

parts by weight

6-3mm fused magnesium chromium composite material

18

3-1mm fused magnesium chromium composite material

20

High purity magnesia

21

Chrome concentrate

10

1-0mm sintered magnesium chromium composite material

25

2μmCr 2 o 3 ultrafine powder

3

Cr metal powder

0.2

0.2mmCaCO 3

3

Sulfurous acid pulp waste liquid

4.8

[0023] The manufacturing method of the semi-recombined magnesia-chrome brick for copper smelting comprises the following steps:

[0024] 1) According to the weight parts of high-purity magnesia and chrome concentrate described in Table 1, enter the ball mill for co-grinding until the pa...

Embodiment 2

[0031] The raw materials contained in semi-recombined magnesia-chrome bricks for copper smelting are shown in Table 2:

[0032] Table 2 Raw materials contained in semi-rebonded magnesia-chrome bricks for copper smelting furnaces

[0033] raw material name

[0034] In this example, semi-rebonded magnesia-chrome bricks for copper smelting are prepared, the sintering temperature is 1700° C., the holding time is 4 hours, and the rest of the steps are the same as in Example 1.

Embodiment 3

[0036] The raw materials contained in the semi-recombined magnesia-chrome bricks for copper smelting furnace are shown in Table 3:

[0037] Table 3 Raw materials contained in semi-rebonded magnesia-chrome bricks for copper smelting furnaces

[0038] raw material name

[0039] In this example, semi-rebonded magnesia-chrome bricks for copper smelting furnaces were prepared, the sintering temperature was 1750° C., the holding time was 4.5 hours, and the rest of the steps were the same as in Example 1.

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Abstract

The invention discloses a semi-rebonded magnesite-chrome brick for a copper smelter. The brick is prepared by an electric smelting magnesite-chrome synthetic material, high purity magnesia, chrome concentrate, a sintered magnesite-chrome synthetic material, Cr2O3 ultrafine powder, a metal additive, an additive and a bonder. The semi-rebonded magnesite-chrome brick prepared by the invention is high in compactness, low in porosity and high in high temperature resistance, and the cost of the semi-rebonded magnesite-chrome brick is lower than that of rebonded magnesite-chrome brick with equivalent components while the thermal shock resistance and the scouring resistance are superior to those of silicon brick and rebonded magnesite-chrome brick currently used for the copper smelter. The semi-rebonded magnesite-chrome brick can replace the rebonded magnesite-chrome brick in a certain range, can be used for furnace top, slag line, nozzle and other severely corroded parts of the copper smelter, and has the objective economic benefit of lowering the cost and increasing the effect in industry of non-ferrous metal metallurgy, and in particular a copper melting process.

Description

technical field [0001] The invention relates to a furnace lining material for a copper smelting furnace and a preparation method thereof, in particular to a semi-rebonded magnesia-chrome brick for a copper smelting furnace and a preparation method thereof. Background technique [0002] The refractory lining used in traditional copper smelting furnaces mainly includes silica bricks, high alumina bricks, magnesia bricks, and magnesia chrome bricks. Due to the influence of chemical erosion and penetration, as well as sharp periodic temperature changes, the bricks are easily deformed; The directly bonded magnesia-chrome bricks have excellent thermal shock stability, but their corrosion resistance is not strong; or the fused and rebonded magnesia-chrome bricks have strong corrosion resistance, but their thermal shock stability is not good. Contents of the invention [0003] In view of the above technical problems, the present invention provides a semi-rebonded magnesia-chrome b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 钱元英蒋鑫匡宇航
Owner 宜兴新威利成耐火材料有限公司
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