High-temperature wear-resistance brick and casting method thereof

Abstract

The invention discloses a high-temperature wear-resistance brick, which is prepared from a raw material comprising the following chemical components in form of oxide in part by weight: 70 to 75 parts of Al2O3, 17 to 22 parts of SiO2, 5 to 7 parts of ZrO2 and Hf2O, 0.9 and 1.2 parts of Na2O, and 0 to 5 parts of Fe2O3, TiO2, CaO and MgO. The crystalline phase of the product consists of 38 to 45 percent of corundum, 38 to 45 percent of mullite, 5 to 7 percent of monoclinic zirconia and the balance of a glass phase. The refractoriness of the high-temperature wear-resistance brick prepared by the invention is above 1,750 DEG C, the pressure strength of the high-temperature wear-resistance brick is over 250MPa, and the high-temperature wear-resistance brick can be well used on a part where a wear-resistance and high-temperature-resistance material is required, and particularly the high-temperature wear-resistance brick can be used for building liner of a rotary calcining furnace to greatly improve the service life and economic benefit of the rotary calcining furnace. The invention also discloses a casting method of the high-temperature wear-resistance brick.

Description

technical field

[0001] The invention relates to a wear-resistant brick, in particular to a high-temperature wear-resistant brick and a casting method thereof. Background technique

[0002] At present, the slide rail bricks of the metallurgical pusher type heating furnace or the tapping platform of the walking heating furnace using the tapping platform to tap steel must not only bear the high temperature when the billet is heated, but also bear the wear when the billet slides. Refractory products The conditions of use are very harsh. At present, the products used in these parts mainly include chrome corundum bricks, mullite bricks, zirconium corundum bricks, etc. Since chrome corundum bricks contain chromium, it is easy to cause environmental pollution. Mullite bricks are heat-resistant Good shock resistance but poor wear resistance, zirconium corundum bricks have good wear resistance but poor thermal shock resistance. Contents of the invention

[0003] The technical probl...

Examples

Embodiment 1

[0026] A high-temperature wear-resistant brick, the weight of raw materials is calculated according to the following chemical composition, expressed in parts by weight based on oxides: Al 2 o 3 : 70, SiO 2 : 17, ZrO 2 +Hf 2 O: 5, Na 2 O: 0.9, Fe 2 o 3 +TiO 2 +CaO+MgO: 2, Al 2 o 3 Derived from bauxite clinker, Al 2 o 3 The particle size of the raw material is 30mm; ZrO 2 +Hf 2 O originates from ZrO 2 +Hf 2 O≥65.5% zircon sand; Na 2 O comes from Na 2 CO 3 ≥99% first grade industrial sodium carbonate, CaO is derived from calcite with CaO≥55.5%, 500kg is added to each furnace, and one furnace is produced every 60 minutes.

[0027] The melting and casting method of high temperature wear-resistant bricks, its steps are as follows:

[0028] (1) mixing the raw materials in a mixer to form a batch;

[0029] (2) Add the batch material into the electric arc furnace and melt it for 60 minutes at 2500°C to form a melt;

[0030] (3) Cast the high-temperature melt into a ...

Embodiment 2

[0032] A high-temperature wear-resistant brick, the weight of raw materials is calculated according to the following chemical composition, expressed in parts by weight based on oxides: Al 2 o 3 : 75, SiO 2 : 22, ZrO 2 +Hf 2 O: 7, Na 2 O: 1.2, Fe 2 o 3 +TiO 2 +CaO+MgO: 5, Al 2 o 3 Derived from kaolinite clinker, Al 2 o 3 The particle size of the raw material is 1mm; ZrO 2 +Hf 2 O originates from ZrO 2 +Hf 2 O≥98.5% desiliconized zirconium; Na 2 O comes from Na 2 CO 3 ≥99% first grade industrial sodium carbonate; CaO is derived from calcite with CaO≥55.5%, each furnace feeds 1200kg, and produces one furnace every 130 minutes.

[0033] The melting and casting method of high temperature wear-resistant bricks, its steps are as follows:

[0034] (1) Mixing the raw materials to form a batch;

[0035] (2) Add the batch material into the electric arc furnace and melt it at 1800°C for 60-150 minutes to form a melt;

[0036] (3) Cast the high-temperature melt into a g...

Embodiment 3

[0038] A high-temperature wear-resistant brick, the weight of raw materials is calculated according to the following chemical composition, expressed in parts by weight based on oxides: Al 2 o 3 : 72, SiO 2 : 18, ZrO 2 +Hf 2 O: 6, Na 2 O: 1.0, Fe 2 o 3 +TiO 2 +CaO+MgO: 3, Al 2 o 3 Derived from synthetic mullite, Al 2 o 3 The particle size of the raw material is 5mm; ZrO 2 +Hf 2 O originates from ZrO 2 +Hf 2 O≥98.5% desiliconized zirconium, Na 2 O comes from Na 2 CO 3 ≥99% primary industrial sodium carbonate; the CaO is derived from calcite with CaO≥55.5%, and 500kg is added to each furnace, and one furnace is produced every 60 minutes.

[0039] The melting and casting method of high temperature wear-resistant bricks, its steps are as follows:

[0040] (1) Mixing the raw materials to form a batch;

[0041] (2) Add the batch material into the electric arc furnace and melt it for 100 minutes at 2000°C to form a melt;

[0042] (3) Cast the high-temperature molten ...

technical field

[0001] The invention relates to a wear-resistant brick, in particular to a high-temperature wear-resistant brick and a casting method thereof. Background technique

[0002] At present, the slide rail bricks of the metallurgical pusher type heating furnace or the tapping platform of the walking heating furnace using the tapping platform to tap steel must not only bear the high temperature when the billet is heated, but also bear the wear when the billet slides. Refractory products The conditions of use are very harsh. At present, the products used in these parts mainly include chrome corundum bricks, mullite bricks, zirconium corundum bricks, etc. Since chrome corundum bricks contain chromium, it is easy to cause environmental pollution. Mullite bricks are heat-resistant Good shock resistance but poor wear resistance, zirconium corundum bricks have good wear resistance but poor thermal shock resistance. Contents of the invention

[0003] The technical probl...

Examples

Embodiment 1

[0026] A high-temperature wear-resistant brick, the weight of raw materials is calculated according to the following chemical composition, expressed in parts by weight based on oxides: Al 2 o 3 : 70, SiO 2 : 17, ZrO 2 +Hf 2 O: 5, Na 2 O: 0.9, Fe 2 o 3 +TiO 2 +CaO+MgO: 2, Al 2 o 3 Derived from bauxite clinker, Al 2 o 3 The particle size of the raw material is 30mm; ZrO 2 +Hf 2 O originates from ZrO 2 +Hf 2 O≥65.5% zircon sand; Na 2 O comes from Na 2 CO 3 ≥99% first grade industrial sodium carbonate, CaO is derived from calcite with CaO≥55.5%, 500kg is added to each furnace, and one furnace is produced every 60 minutes.

[0027] The melting and casting method of high temperature wear-resistant bricks, its steps are as follows:

[0028] (1) mixing the raw materials in a mixer to form a batch;

[0029] (2) Add the batch material into the electric arc furnace and melt it for 60 minutes at 2500°C to form a melt;

[0030] (3) Cast the high-temperature melt into a ...

Embodiment 2

[0032] A high-temperature wear-resistant brick, the weight of raw materials is calculated according to the following chemical composition, expressed in parts by weight based on oxides: Al 2 o 3 : 75, SiO 2 : 22, ZrO 2 +Hf 2 O: 7, Na 2 O: 1.2, Fe 2 o 3 +TiO 2 +CaO+MgO: 5, Al 2 o 3 Derived from kaolinite clinker, Al 2 o 3 The particle size of the raw material is 1mm; ZrO 2 +Hf 2 O originates from ZrO 2 +Hf 2 O≥98.5% desiliconized zirconium; Na 2 O comes from Na 2 CO 3 ≥99% first grade industrial sodium carbonate; CaO is derived from calcite with CaO≥55.5%, each furnace feeds 1200kg, and produces one furnace every 130 minutes.

[0033] The melting and casting method of high temperature wear-resistant bricks, its steps are as follows:

[0034] (1) Mixing the raw materials to form a batch;

[0035] (2) Add the batch material into the electric arc furnace and melt it at 1800°C for 60-150 minutes to form a melt;

[0036] (3) Cast the high-temperature melt into a g...

Embodiment 3

[0038] A high-temperature wear-resistant brick, the weight of raw materials is calculated according to the following chemical composition, expressed in parts by weight based on oxides: Al 2 o 3 : 72, SiO 2 : 18, ZrO 2 +Hf 2 O: 6, Na 2 O: 1.0, Fe 2 o 3 +TiO 2 +CaO+MgO: 3, Al 2 o 3 Derived from synthetic mullite, Al 2 o 3 The particle size of the raw material is 5mm; ZrO 2 +Hf 2 O originates from ZrO 2 +Hf 2 O≥98.5% desiliconized zirconium, Na 2 O comes from Na 2 CO 3 ≥99% primary industrial sodium carbonate; the CaO is derived from calcite with CaO≥55.5%, and 500kg is added to each furnace, and one furnace is produced every 60 minutes.

[0039] The melting and casting method of high temperature wear-resistant bricks, its steps are as follows:

[0040] (1) Mixing the raw materials to form a batch;

[0041] (2) Add the batch material into the electric arc furnace and melt it for 100 minutes at 2000°C to form a melt;

[0042] (3) Cast the high-temperature molten ...