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Masonry material for ladle of ferro-silicon-calcium electric furnace

A silicon calcium iron alloy and molten iron technology, applied in the field of refractory materials, can solve the problems of low safety, easy burn-through, and high temperature of molten iron, and achieve the effects of prolonging service life, solving easy burning-through and low cost.

Inactive Publication Date: 2010-05-19
陕西盛华冶化有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The specific gravity of the slag is larger than that of the alloy liquid, so it is deposited on the bottom of the ladle. The temperature of the molten iron is as high as 1900°C (300°C-500°C higher than that of other ferroalloys), and at the same time, a large amount of high-temperature furnace gas is violently discharged. The ladle has to withstand The joint erosion and impact of high temperature, chemical, mechanical and other factors, obviously, the refractory lining of traditional silicon or high alumina refractory material, its refractory temperature obviously cannot withstand the erosion of molten iron above 1900 ℃, it is easy to burn through, safe Low sex

Method used

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Embodiment Construction

[0011] An embodiment is described below to further describe the present invention.

[0012] 1. Graphite brick impregnated with phosphoric acid;

[0013] 2. The method used - every five graphite bricks are combined and hooped into one, and fixed;

[0014] 3. Use the graphite bricks tied together with the above-mentioned hoops to build the inner layer of the molten iron wall;

[0015] 4. Add refractory cement with calcined anthracite grains, and build the outer layer of the molten iron clad wall. The proportioning ratio is (calcined anthracite coal grains: refractory cement)=75:25;

[0016] 5. Use a vibrating rod to tamp the ladle that has been built by masonry;

[0017] 6. Place the above-mentioned molten iron ladle at 1000-1200°C, bake for 4-8 hours, and keep warm at 1000-1100°C for use.

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Abstract

The invention relates to a high-temperature resistant masonry material for a ladle of a ferro-silicon-calcium electric furnace and a making method thereof. The making method of the masonry material for the ladle of the ferro-silicon-calcium electric furnace comprises the steps of: (1) adopting graphite bricks actively immersed with phosphoric acid; (2) bricking in a bundling mode to form a wall packing inner layer and preparing fire resistant cement into an outer layer by calcining smokeless coal particles; (3) tamping the bricked ladle; and (4) baking the ladle at 1000 DEG C to 1200 DEG C for 4 to 8 hours; keeping the temperature for later use at the temperature of 1000 DEG C to 1100 DEG C. Compared with a traditional masonry material, the masonry material for the ladle of the ferro-silicon-calcium electric furnace prolongs the service life of the ladle by three to five times.

Description

technical field [0001] The invention relates to a refractory material used in ferroalloy smelting, in particular to a high-temperature-resistant masonry material for a silicon-calcium-iron alloy electric furnace ladle and a manufacturing method thereof. Background technique [0002] In the smelting and production of small calcium silicon furnaces, the interval between tapping is 6-8 hours. Whenever it comes out of the furnace, the temperature of molten iron is very high, and each furnace has 500-800kg. Due to the small heat capacity, long interval time and small amount of slag, the molten iron ladle is in the shape of a pot. The refractory material of the ladle is built by tamping and sintering with electrode paste, and then laying a layer of 200mm thick quartz sand. The slag cleaning process after pouring and the time it takes will not affect the release of the next furnace. But for large-scale electric furnace smelting silicon-calcium, a furnace of molten iron containing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/622
Inventor 魏新华李兴波
Owner 陕西盛华冶化有限公司
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