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

A composite slag-forming agent and slag-forming agent technology, applied in the field of metallurgy, can solve the problems of poor dephosphorization effect, easy splashing and drying of slag, etc., and achieve the effects of good effect, shortened oxygen blowing time, and reduced production cost.

Inactive Publication Date: 2013-02-27
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 with a mass ratio of 60:12:18:6:4 and mix them. In the symmetrical briquetting machine, adjust the pressure of the symmetric briquetting machine to 30Mpa, extrude spherical particles with a diameter of 20-50mm, and bake the spherical particles with a belt dryer at a baking temperature of 175°C for 78 minutes. The composite slagging agent for pelletizing semi-steel making is obtained. After testing, Fe in the obtained pelletized semi-steel steelmaking compound slagging agent 2 o 3 content, FeO content, MnO content, SiO 2 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 defects that the slag is easy to splash and dry back.

[0056] The prepared...

Embodiment 2

[0058] Mix the vanadium extraction tailings, quartz sand, converter steel slag magnetically separated granulated iron, bentonite, and cement in the above Table 1 into the roller sand mixer with a mass ratio of 70:10:10:6:4, and then add In the symmetrical briquetting machine, adjust the pressure of the symmetric briquetting machine to 35Mpa, squeeze out spherical particles with a diameter of 20-50mm, and bake the spherical particles with a belt dryer at a baking temperature of 180°C for 85 minutes After that, the compound slagging agent for pelletizing semi-steel making is obtained. After testing, Fe in the obtained pelletized semi-steel steelmaking compound slagging agent 2 o 3 content, FeO content, MnO content, SiO 2 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 defects that the slag is easy to splash and dry back...

Embodiment 3

[0061] Mix the vanadium extraction tailings, quartz sand, converter steel slag magnetically separated granulated iron, bentonite, and cement in the above Table 1 into the roller sand mixer with a mass ratio of 65:15:10:6:4, and then add Into the symmetrical briquetting machine, adjust the pressure of the symmetric briquetting machine to 40Mpa, squeeze out spherical particles with a diameter of 20-50mm, and bake the spherical particles with a belt dryer at a baking temperature of 130°C for 70 minutes After that, the compound slagging agent for pelletizing semi-steel making is obtained. After testing, Fe in the obtained pelletized semi-steel steelmaking compound slagging agent 2 o 3 content, FeO content, MnO content, SiO 2 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 defects that the slag is easy to splash and dry ba...

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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 slagging agent for semi-steel making in a converter, a preparation method and a use method thereof, and belongs to the technical field of metallurgy. Background technique [0002] In my country, some iron and steel plants use vanadium-titanium magnetite for smelting. In order to ensure the effective utilization of resources, desulfurization and vanadium extraction processes are usually carried out before steelmaking. The carbon mass percentage in the semi-steel obtained after desulfurization and vanadium extraction is 3.2 % to 3.8%, the mass percentage of phosphorus in semi-steel is 0.06% to 0.09%, and the content of other silicon and manganese elements that generate heat and slag are traces, resulting in insufficient heat source and slow slagging speed in the process of semi-steel making. Problem, therefore, in order to effectively carry out semi-steel steelmaking, it is usually necessary to add composite slagging materials in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/076C22B1/248C21C5/36
CPCY02P10/20
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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