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Slag-forming constituent and preparation thereof

A slag-forming agent and drying technology, applied in the field of metallurgy, can solve the problems of low iron grade of steel-making sludge, secondary environmental pollution and high water content, and achieve the reduction of iron and steel material consumption, the improvement of dephosphorization efficiency, and the fast slag formation speed. Effect

Active Publication Date: 2010-09-29
PANZHIHUA GANGCHENG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking the 5 million tons of steel smelted in the headquarters of Panzhihua Iron and Steel Group as an example, the steelmaking converter produces about 50,000 tons of steelmaking sludge every year. A small part of the steelmaking sludge with high iron grade can be reused by magnetic separation. Selected for returning to sintering, but there are always problems of low iron grade and high water content in steelmaking sludge, which affects the normal production of sintering plants and the quality of sinter ore, so the reuse amount of steelmaking sludge is on a downward trend , stacking backlogs to form a cycle, causing secondary pollution to the environment

Method used

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  • Slag-forming constituent and preparation thereof
  • Slag-forming constituent and preparation thereof
  • Slag-forming constituent and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 25% by weight of high siliceous manganese ore, 25% by weight of steelmaking sludge, 45% by weight of quartz sand and 5% by weight of magnesium chloride binder are weighed and prepared, and then sent into the mixing mixer, fully mixed After stirring, make elliptical or round pellets of 30mm to 50mm, refer to Table 6 for the drying conditions, and control the moisture content to be less than 1% after drying.

Embodiment 2

[0033] 25% by weight of high siliceous manganese ore, 35% by weight of steelmaking sludge, 35% by weight of quartz sand and 5% by weight of magnesium chloride binder are weighed and prepared, and then sent into the mixing mixer, fully mixed After stirring, make elliptical or round pellets of 30mm to 50mm, refer to Table 6 for the drying conditions, and control the moisture content to be less than 1% after drying.

Embodiment 3

[0035] 25% by weight of manganese ore, 30% by weight of steelmaking sludge, 40% by weight of quartz sand and 5% by weight of magnesium chloride binder are weighed and prepared, and then sent into the mixing mixer, after fully mixing and stirring, Make elliptical or round pellets of 30mm to 50mm, refer to Table 6 for the drying conditions, and control the moisture content to be less than 1% after drying.

[0036] See Table 5 for the detection of the chemical components of the slagging agents obtained in Examples 1-3, Table 6 for the detection of the pulverization rate, and Table 7 for the smelting effect.

[0037] Table 5 Chemical Composition Detection (%)

[0038]

[0039] After being dried by natural stacking, it is sent to a vertical drying furnace for drying treatment. See Table 6 for the control of drying temperature and drying time.

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Abstract

The invention belongs to the metallurgical field, and particularly relates to a slag former and a method for preparing the same. The technical problem solved by the invention is to provide a slag former with quick slagging by utilizing steelmaking sludge as a main material. The slag former consists of the following materials in weight percentage: 25 to 35 percent of steelmaking sludge, 25 percentof manganese ore with high silica, 34 to 45 percent of quartz sand and 5 percent of magnesium chloride. The average slag forming time of the slag former is 4.4 minutes, which is 1.5 minutes shorter than the prior slaggng method, and the average dephosphorizing efficiency is improved by 6.75 percent. Therefore the slag former maximally recovers iron in the sludge and lowers iron and steel consumption.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a slagging agent and a preparation method thereof. Background technique [0002] Existing slag-forming agents generally make slag from lime and light-burned dolomite, such as adding quartz sand, manganese ore, magnesium chloride and other components to lime and light-burned dolomite to make slag, mix and stir, press into pellets and dry. Slag agent, but the inventors found that lime and light-burned dolomite cannot be fully melted in the slag in the converter, and there is a defect that the slagging speed is relatively slow. [0003] During the smelting process of iron and steel enterprises, the steelmaking converter produces a large amount of smoke and dust, which is precipitated by wet dust removal and becomes steelmaking sludge. Taking the 5 million tons of steel smelted in the headquarters of Panzhihua Iron and Steel Group as an example, the steelmaking converter produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/28C21C7/076
CPCY02P10/20
Inventor 青光红陈涛黎光正边程军吴胜利陈桂卫
Owner PANZHIHUA GANGCHENG GROUP
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