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Casting residual steel slag recycling method

A technology of steel slag recovery and excess injection, which is applied in the field of iron and steel metallurgy to achieve the effects of accelerating slag flow, reducing the consumption of cold slag materials and reducing the temperature drop.

Inactive Publication Date: 2015-12-09
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is no one in the prior art that can effectively remove phosphorus from semi-steel, improve the cleanliness of molten steel; reduce the temperature drop when tapping the converter, effectively reduce the consumption of semi-steel covering agent, and reduce the consumption of cold slag in the steelmaking converter , a method for recycling the remaining steel slag to reduce the consumption of steel materials

Method used

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  • Casting residual steel slag recycling method

Examples

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Effect test

Embodiment 1

[0041] Embodiment 1. The slag injection of furnace number P14608455 is hoisted by a crane to the sky over the trolley, and the ladle slag tank is slowly lowered. When the distance between the two tank mouths is 0.8m, the slag injection is slowly poured into the In the semi-steel empty tank on the straddle trolley, the time from the end of casting to the end of slag turning is controlled within 10 minutes, and the weight of the residual slag is 1.7t. The semi-steel tank on the straddle trolley is transported to the vanadium extraction span, and the transportation time is 31 minutes , the semi-steel tank is discharged from the vanadium extracting furnace P14518730, the furnace shakes slowly when the semi-steel is discharged, and the slag liquid foams and rises, add 0.72Kg / t to the semi-steel tank 半钢 Deoxidation of aluminum and iron reduces the consumption of semi-steel covering agent by 0.53Kg / t 半钢 . After the semi-steel is produced, it is transported to the steelmaking convert...

Embodiment 2

[0042] Example 2: Smelting No. P14608723 heat continuous casting slag injection is hoisted by a crane to the sky over the trolley, and the ladle slag tank is slowly lowered. When the distance between the two tank mouths is 0.7m, slowly pour the slag injection into the overpass In the semi-steel empty tank on the straddle trolley, the time from the end of casting to the end of slag turning is controlled at 11 minutes, and the weight of the residual slag is 1.5t. The semi-steel tank on the straddle trolley is transported to the vanadium extraction span, and the transportation time is 35 minutes , the semi-steel tank is discharged from the vanadium extracting furnace P14519393. When the semi-steel is discharged, the furnace shakes slowly, and the slag liquid foams and rises. Add 0.65Kg / t to the semi-steel tank 半钢 Deoxidation of aluminum and iron reduces the consumption of semi-steel covering agent by 0.85Kg / t 半钢 . After the semi-steel is produced, it is transported to the steelm...

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Abstract

The invention discloses a casting residual steel slag recycling method, and particularly provides a casting residual steel slag recycling method applied to the technical field of ferrous metallurgy. By means of the casting residual steel slag recycling method, phosphorus in semisteel can be effectively removed, the cleanliness of molten steel can be improved, the temperature drop generated during converter steel tapping is small, and the consumption of semisteel covering agents and the consumption of steelmaking converter cold slag materials are effectively reduced. The casting residual steel slag recycling method includes the following steps: a, molten steel casting is carried out; b, casting residual steel slag generated after molten steel casting is poured into a semisteel tank on a spanning part crossing trolley; c, the semisteel tank on the spanning part crossing trolley is delivered to a vanadium extracting spanning part; d, semisteel tapping is carried out on the semisteel tank at a vanadium extracting furnace; e, the casting residual steel slag generated after semisteel tapping is carried out is delivered to a steelmaking converter to be smelted; f, furnace post-treatment is carried out on the casting residual steel slag; g, the casting residual steel slag is refined; and h, the steps are sequentially repeated. By means of the casting residual steel slag recycling method, the phosphorus in the semisteel can be effectively removed, the cleanliness of the molten steel can be improved, and the consumption of steel materials can be greatly reduced.

Description

technical field [0001] The invention relates to a method for recycling excess steel slag, in particular to a method for recycling excess steel slag applied in the technical field of iron and steel metallurgy. Background technique [0002] In the utilization of the excess steel slag, pouring the excess steel slag into the empty ladle or pouring it into the heavy iron ladle has literature reports and proprietary technologies. Among them, the patent document with publication number: CN1804047 (publication date: 2006.07.19), Method for Recycling and Utilizing Excess Hot Steel Slag from Steelmaking, discloses a method for recycling and utilizing Excess Hot Steel Slag from Steelmaking. In this method, the poured hot state steel slag in the ladle is poured into the empty steel ladle; the steel ladle containing the poured hot state steel slag is transported to the converter, and steel is tapped in it; the steel ladle containing the molten steel and the poured hot state steel slag is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064C21C5/28
CPCY02P10/20
Inventor 郭奠荣杨森祥李锡福陈怀杰黄德胜解明科
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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