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Coolant for steel making with red mud and preparation process thereof

A technology of coolant and red mud, applied in the field of iron and steel smelting, can solve the problems of unstable operation, high steelmaking cost, large temperature drop, etc., and achieve the effects of stable operation, low production cost, and improved yield

Inactive Publication Date: 2012-05-23
济南钢铁集团总公司生产服务公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, the converter coolant currently used in the field of iron and steel smelting is mainly lump iron ore. As a coolant, lump iron ore has a large temperature drop, unstable operation, high blowing loss, and high steelmaking costs.

Method used

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  • Coolant for steel making with red mud and preparation process thereof
  • Coolant for steel making with red mud and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Select 1 ton of red mud with a particle size of 300 meshes with an iron content of 47% (percentage by weight) after magnetic separation, and dry it in a dry and ventilated environment for 3 days until the water content of the red mud is equal to 5%; then add 5% (percentage by weight) Bentonite is stirred in a blender for 3 minutes until the material is uniform; then add 6% (percentage by weight) of sodium bicarbonate and stir for 5 minutes until the material is uniform; then the material is added to the ball press, and the diameter of pressing is 80 mm Then send the above red mud spheres into the drying furnace, and dry them for 180 minutes at 400°C until the water content of the red mud spheres is equal to 4%, and then you can get the finished red mud spheres, which can be packaged and put into storage .

Embodiment 2

[0021] Select 1 ton of red mud with a particle size of 100 meshes and an iron content of 47% (percentage by weight) after magnetic separation, and dry it in a dry and ventilated environment for 1 day until the water content of the red mud is equal to 6%; then add 1% (percentage by weight) The bentonite is stirred in a blender for 1 minute until the material is uniform; then add 2% (percentage by weight) of sodium bicarbonate and stir for 3 minutes until the material is uniform; then the material is added to the ball press, and the diameter of pressing is 20 mm Then send the above red mud spheres into the drying furnace, and dry them at 200°C for 30 minutes until the water content of the red mud spheres is equal to 5%, and then you can get the finished red mud spheres, which can be packaged and put into storage. .

Embodiment 3

[0023] Select 1 ton of red mud with a particle size of 200 meshes with an iron content of 47% (weight percentage) or more after magnetic separation, and dry it in a dry and ventilated environment for 2 days until the water content of the red mud is equal to 4%; then add 3% (weight percentage) The bentonite is stirred in a blender for 2 minutes until the material is uniform; then add 4% (percentage by weight) of sodium bicarbonate and stir for 4 minutes until the material is uniform; then the material is added to the ball press, and the diameter of pressing is 50 mm Then send the above red mud spheres into the drying furnace, and dry them for 100 minutes at 300°C until the water content of the red mud spheres is equal to 3%, and then you can get the finished red mud spheres, which can be packaged and put into storage. .

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Abstract

The invention discloses a coolant for steel making with red mud and a preparation process thereof, belonging to the field of steel making. The coolant for steel making with red mud is prepared according to the following steps of: airing suitable red mud, then adding 1-5 percent by weight of bentonite, and uniformly stirring in a stirrer; adding 2-6 percent by weight of sodium silicate and uniformly stirring; adding the materials into a ball press to press balls with diameters of 20-80 millimeters; and conveying the red mud balls into a drying oven, and drying for 30-180 minutes until the water content of the red mud balls is lower than or equal to 5 percent to obtain finished red mud balls. Compared with massive iron ore, the coolant for steel making with the red mud has small temperature drop, reduces the puff loss by 0.6 percent and improves the yield of steel; the improvement of the alkalinity reduces the consumption of fluorite and brings obvious economic benefit; and the secondary utilization to the red mud reduces the environmental pollution.

Description

technical field [0001] The invention relates to the field of iron and steel smelting, in particular to a red mud steelmaking coolant and a manufacturing process thereof. Background technique [0002] Red mud is a by-product of the alumina production process. At present, most of the alumina factories at home and abroad transport the red mud to the storage yard and build a dam for wet storage. This method will easily cause a large amount of waste lye to penetrate into the nearby farmland, resulting in alkalization and swamping of the soil. , polluting surface and groundwater sources. Another commonly used method is to dry and dehydrate the red mud and dry it after evaporation, and most of the stockyard dams are constructed with red mud. The stacking of red mud not only occupies a large amount of land, but also consumes more yard construction and maintenance costs, and the lye present in the red mud seeps into the ground, causing groundwater and soil pollution. The exposed re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/00
Inventor 赵恒沈相东侯广尧李刚
Owner 济南钢铁集团总公司生产服务公司