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Composite slagging agent for making semisteel, and preparation method and using method thereof

A composite slagging agent and slagging agent technology, applied in the field of metallurgy, can solve the problems of easy slag splashing, re-drying, and poor dephosphorization effect, and achieve the effects of reducing pressure, good effect, and reducing consumption of steel materials

Inactive Publication Date: 2011-09-14
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first technical problem to be solved by the present invention is to provide a method for dephosphorization of semi-steel steelmaking slag in view of the defects in the prior art that the slag is easy to splash and dry back, and the dephosphorization effect is poor. Compound slagging agent

Method used

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  • Composite slagging agent for making semisteel, and preparation method and using method thereof
  • Composite slagging agent for making semisteel, and preparation method and using method thereof
  • Composite slagging agent for making semisteel, and preparation method and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Put the vanadium extraction tailings, quartz sand, converter steel slag magnetically separated granulated iron, bentonite, and cement in Table 1 into the roller sand mixer at a mass ratio of 60:12:18:6:4, mix and stir, stir evenly and add to In the symmetrical ball press machine, adjust the pressure of the symmetrical ball press machine to 30Mpa to extrude spherical particles with a diameter of 20-50mm. The spherical particles are baked with a belt dryer at a baking temperature of 175°C and after baking for 78 minutes A composite slagging agent for pellets and semi-steel steelmaking is obtained. After testing, Fe in the obtained pellet semi-steel steelmaking composite slagging agent 2 O 3 Content, FeO content, MnO content, SiO 2 The content, CaO content and MgO content are shown in Table 3. It can be seen that the iron oxide content of the composite slagging agent prepared by the present invention is appropriate, thereby overcoming the defect that the slag is easy to spl...

Embodiment 2

[0058] Put the vanadium extraction tailings, quartz sand, converter steel slag magnetically separated granular iron, bentonite, and cement in the above table 1 into the roller sand mixer at a mass ratio of 70:10:10:6:4, mix and stir, stir evenly and then add In the symmetrical ball press, adjust the pressure of the symmetrical ball press to 35Mpa, extrude spherical particles with a diameter of 20-50mm, and bake the spherical particles with a belt dryer at a baking temperature of 180°C and baking for 85 minutes After that, the pellets and semi-steel steelmaking composite slagging agent are obtained. After testing, Fe in the obtained pellet semi-steel steelmaking composite slagging agent 2 0 3 Content, FeO content, MnO content, SiO 2 The content, CaO content and MgO content are shown in Table 3. It can be seen that the iron oxide content of the composite slagging agent prepared by the present invention is appropriate, thereby overcoming the defect that the slag is easy to splash ...

Embodiment 3

[0061] Put the vanadium extraction tailings, quartz sand, converter steel slag magnetically separated granular iron, bentonite, and cement in the above table 1 into the roller sand mixer at a mass ratio of 65:15:10:6:4, mix and stir, stir evenly and then add In the symmetrical ball press, adjust the pressure of the symmetrical ball press to 40Mpa, and extrude spherical particles with a diameter of 20-50mm. The spherical particles are baked with a belt dryer at a baking temperature of 130°C and baking for 70 minutes Then the pellets, semi-steel steelmaking composite slag-making agent are obtained. After testing, Fe in the obtained pellet semi-steel steelmaking composite slagging agent 2 O 3 Content, FeO content, MnO content, SiO 2 The content, CaO content and MgO content are shown in Table 3. It can be seen that the iron oxide content of the composite slagging agent prepared by the present invention is appropriate, thereby overcoming the defect that the slag is easy to splash an...

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Abstract

The invention discloses a composite slagging agent for making semisteel, and a preparation method and a using method thereof. The slagging agent comprises the following components in part by weight: 26 to 36 parts of iron-containing oxide, 27 to 35 parts of SiO2, 7 to 13 parts of CaO, 4 to 7 parts of MnO and 4 to 8 parts of MgO, wherein the iron-containing oxide comprises Fe2O3 and FeO in the weight ratio of (50-60):1. The preparation method comprises the following steps of: mixing vanadium-extracted tailings, quartz sand, converter steel slag magnetic ball iron and a binding agent according to a certain mass ratio and uniformly stirring; pressing into pellets; and drying to obtain the slagging agent. The slagging agent prepared by the preparation method can be used for making the semisteel together with active lime and high-magnesium lime. By the composite slagging agent prepared by the method, the defects that the slag is easy to splash and dry, has a poor dephosphorization effect, is extremely difficult to operate and the like are overcome in the semisteel making and using process.

Description

Technical field [0001] The invention relates to a slag-making agent for semi-steel steelmaking of a converter, a preparation method and a use method thereof, and belongs to the technical field of metallurgy. Background technique [0002] In China, some steel plants use vanadium-titanium magnetite for smelting. In order to ensure the effective use of resources, desulfurization and vanadium extraction processes are usually carried out before steelmaking. The carbon content of semi-steel obtained after desulfurization and vanadium extraction is 3.2 %~3.8%, the mass percentage of phosphorus in the semi-steel is 0.06%~0.09%, and the content of the remaining silicon and manganese heat-generating slag-forming elements are traces, resulting in insufficient heat source and slow slagging rate in the semi-steel steelmaking process. Therefore, in order to effectively carry out semi-steel steelmaking, it is usually necessary to add composite slagging materials in the steelmaking process to en...

Claims

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Application Information

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IPC IPC(8): C21C7/076C22B1/248C21C5/36
CPCY02P10/242Y02P10/20
Inventor 王建李茂林易良刚何为陈永林立余海滨杨森祥戈文荪彭毅
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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