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Fire-resistant pouring material used for bottom of lead smelting furnace

A technology for refractory castables and lead smelting furnaces, applied in the field of refractory materials, can solve the problems of strong penetration, damage to the bottom of refractory bricks, and high density of lead liquid, and achieve high compressive strength, good thermal shock stability, and promote The effect of room temperature curing

Active Publication Date: 2014-08-13
郑州瑞泰耐火科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high density and strong penetrability of lead liquid, coupled with the influence of low viscosity and high fluidity, lead liquid is easy to penetrate deeply along the joints of refractory bricks, and chemically reacts with refractory bricks and produces large volume expansion. , causing damage to the bottom of the refractory brick

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A refractory castable for the bottom of a lead smelting furnace, the mass percentage of each component is as follows:

[0019] 10-5mm super bauxite clinker: 27%, 5-3mm super bauxite clinker: 20%, d 90 95 90 The dosage of <0.088mm active magnesium aluminum spinel is 2% of the total mass of the above raw materials, and the dosage of the aluminum phosphate solution is 11% of the total mass of the above raw materials.

[0020] Implementation effect: Bulk density: 2.86g / cm 3 ; Compressive strength: 110℃×24 hours after baking, 108MPa, 1100℃×3 hours after burning, 116MPa; flexural strength, 110℃×24 hours after baking, 11MPa, 1100℃×3 hours after burning, 12MPa; ℃ × 3 hours after burning line rate of change + 0.1%.

Embodiment 2

[0022] A refractory castable for the bottom of a lead smelting furnace, the mass percentage of each component is as follows:

[0023] 10-5mm super bauxite clinker: 23%, 5-3mm super bauxite clinker: 20%, d 90 9590 The dosage of <0.088mm active magnesium aluminum spinel is 2% of the total mass of the above raw materials, and the dosage of the aluminum phosphate solution is 12% of the total mass of the above raw materials.

[0024] Implementation effect: Bulk density: 2.9g / cm 3 ;Compressive strength: 118MPa after baking at 110℃×24 hours, 125MPa after baking at 1100℃×3 hours; flexural strength, 12MPa after baking at 110℃×24 hours, 12MPa after baking at 1100℃×3 hours; ℃ × 3 hours after burning line rate of change + 0.1%.

Embodiment 3

[0026] A refractory castable for the bottom of a lead smelting furnace, the mass percentage of each component is as follows:

[0027] 10-5mm super bauxite clinker: 35%, 5-3mm super bauxite clinker: 15%, d 90 95 90 The dosage of <0.088mm active magnesium aluminum spinel is 3% of the total mass of the above raw materials, and the dosage of the aluminum phosphate solution is 10% of the total mass of the above raw materials.

[0028] Implementation effect: Bulk density: 2.8g / cm 3 ; Compressive strength: 110℃×24 hours after baking, 100MPa, 1100℃×3 hours after baking, 110MPa; flexural strength, 110℃×24 hours after baking, 11MPa, 1100℃×3 hours after burning, 12MPa; 1100 ℃ × 3 hours after burning line rate of change + 0.1%.

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Abstract

The invention relates to a fire-resistant pouring material used for the bottom of a lead smelting furnace. The fire-resistant pouring material comprises the following components: 10-5mm special-grade alumina clinker, 5-3mm special-grade alumina clinker, special-grade alumina clinker with d90 being less than 0.088mm, 3-1mm brown aluminium oxide, 1-0.088mm brown aluminium oxide, alpha-alumina micro powder with d95 being less than 0.020mm, silica powder, and industrial-grade chromium oxide green; in addition, an additive consisting of compound hardening accelerator and aluminium phosphate solution is also used. The magnesium-aluminium-chrome spinel castable disclosed by the invention can be sintered and shows excellent thermal shock resistance, stripping resistance, erosion resistance, slag bonding prevention and the like under a low temperature process condition during copper smelting, thereby meeting the use requirement of long-term use of a fireproof lining of a copper smelting tundish.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and more specifically, the invention relates to a refractory castable for the bottom of a lead smelting furnace. Background technique [0002] The emergence of refractory castables is a mileage cup in the history of refractory materials. Refractory castables not only have excellent performance, but also have a simple production process and low cost, especially in high-temperature equipment such as ladles, converters, and electric furnaces. Improve the service life of the equipment. [0003] The development trend of non-ferrous metallurgy is to continuously improve new processes and technologies, update smelting equipment, strengthen smelting operations, and increase labor productivity. Especially for lead smelting furnaces, with the increase in size and efficiency, the requirements for refractory materials are getting higher and higher. In the past, the bottom of the lead smelting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 李全有赵洪亮郑建立曹伟赵路生李沅锦
Owner 郑州瑞泰耐火科技有限公司
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