CN103146877B - A steel refining agent containing bamboo charcoal - Google Patents

Abstract

The invention discloses a bamboo charcoal-containing steel-making refining agent and a preparation method thereof, wherein the bamboo charcoal-containing steel-making refining agent comprises the following raw materials in parts by weight: 28-32 parts of calcium fluoride, 18-22 parts of ferric oxide, 17-19 parts of boron carbide, 15-17 parts of iron ore slag, 10-15 parts of bamboo charcoal, 6-8 parts of fluorite slag, 20-25 parts of hydrotalcite powder and 3-5 parts of modified nano powder; the invention takes calcium fluoride and ferric oxide as main raw materials, and bamboo charcoal, fluorite slag, hydrotalcite powder and modified nano powder are added, thereby changing waste into valuable, fully utilizing the adsorption performance of the calcium fluoride, having good desulfurization and dephosphorization effects of the refining agent, reducing the rephosphorization phenomenon, and simultaneously having high calcium fluoride content and reducing the production cost.

Description

A steel refining agent containing bamboo charcoal

technical field

The invention relates to the technical field of steelmaking, in particular to a steelmaking refining agent containing bamboo charcoal and a preparation method thereof. the

Background technique

At present, higher and higher requirements are put forward for steelmaking productivity and cost as well as the quality of steel products. In order to meet this requirement, refining outside the furnace, especially ladle furnace refining, has become an important production process in the modern refining process. It is widely used in various metallurgical enterprises Widely used, one of the main metallurgical functions of ladle furnace refining is to use refining agents to refine molten steel to achieve the purpose of reducing the content of oxygen, sulfur and inclusions in molten steel and improve the performance of steel. There are many types of refining agents. the

Contents of the invention

The object of the present invention is to provide a kind of steelmaking refining agent containing bamboo charcoal and preparation method thereof, in the refining agent formula of the present invention, have increased bamboo charcoal, fluorite slag, hydrotalcite powder and modified nanopowder, have fully utilized its adsorption performance, The refining agent has good desulfurization and dephosphorization effects and low cost. the

In order to achieve the above object, the present invention adopts the following technical solutions:

Steelmaking refining agent containing bamboo charcoal, the weight parts of its raw materials are: calcium fluoride 28-32, iron oxide 18-22, boron carbide 17-19, iron slag 15-17, bamboo charcoal 10-15, fluorite slag 6-8. Hydrotalcite powder 20-25 and modified nanometer powder 3-5.

Steelmaking refining agent containing bamboo charcoal, the weight parts of its raw materials are: calcium fluoride 30, iron oxide 20, boron carbide 18, iron slag 16, bamboo charcoal 12, fluorite slag 7, hydrotalcite powder 22 and modified nano Powder 4. the

The preparation method of the steelmaking refining agent containing bamboo charcoal, comprises the following steps:

(1) Crushing: use a crusher to break each raw material separately;

(2) Mixing: Mix the crushed raw materials according to the formula requirements, and mix them evenly with a ball mill;

(3) Screening: Screen the uniformly mixed raw materials with a 150-mesh screen;

(4) Drying: Baking the sieved raw materials in an oven to remove moisture, the baking temperature is 90-120°C, and the baking time is controlled according to the degree of moisture volatilization.

The preparation method of the modified nano-powder is as follows: melt the sepiolite powder at a temperature of 1600-1700°C, add iron powder equivalent to 2-4% of its weight, and 1-2% plant ash, stir evenly, and pour into in cold water, dried, and crushed into powder. the

Beneficial effects of the present invention:

The present invention uses calcium fluoride and iron oxide as main raw materials, adds bamboo charcoal, fluorite slag, hydrotalcite powder and modified nanometer powder, turns waste into treasure, fully utilizes its adsorption performance, refining agent desulfurization and dephosphorization effects Well, the phenomenon of returning phosphorus is reduced, and at the same time, the content of calcium fluoride is high, which reduces the production cost.

Detailed ways

Embodiment 1: the steelmaking refining agent that contains bamboo charcoal, the weight parts (kg) of its composition raw material is: calcium fluoride 30, iron oxide 20, boron carbide 18, iron slag 16, bamboo charcoal 12, fluorite slag 7, water Talc powder 22 and modified nano powder 4. the

The preparation method of the steelmaking refining agent containing bamboo charcoal, comprises the following steps:

(1) Crushing: use a crusher to break each raw material separately;

(2) Mixing: Mix the crushed raw materials according to the formula requirements, and mix them evenly with a ball mill;

(3) Screening: Screen the uniformly mixed raw materials with a 150-mesh screen;

(4) Drying: Baking the sieved raw materials in an oven to remove moisture, the baking temperature is 105°C, and the baking time is controlled according to the degree of moisture volatilization.

The preparation method of the modified nano-powder is as follows: melt the sepiolite powder at a temperature of 1600-1700°C, add iron powder equivalent to 4% of its weight, 2% plant ash, stir evenly, pour into cold water, and dry Dried and crushed into powder. the

Below in conjunction with the preparation examples of the above-mentioned refining agent, specifically describe the use method of the steelmaking refining agent of the present invention: 

Adopt the refining agent described in embodiment 1, according to routine dosing method, divide and add twice, test ladle has No. 1-5, desulfurization, sulfur phosphorus effect are as follows:

No. 1: Molten steel conditions: S 0.037%, P 0.169%; desulfurization rate 61%, dephosphorization rate 45%;

No. 2: molten steel conditions: S 0.043%, P 0.164%; desulfurization rate 51%, dephosphorization rate 50%;

No. 3: molten steel conditions: S 0.042%, P 0.162%; desulfurization rate 52%, dephosphorization rate 53%;

No. 4: molten steel conditions: S 0.046%, P 0.167%; desulfurization rate 47%, dephosphorization rate 47%;

No. 5: Molten steel conditions: S 0.039%, P 0.165%; desulfurization rate 58%, dephosphorization rate 49%.

It shows that the refining agent of the present invention has higher desulfurization, sulfur and phosphorus rates, good stability and low cost, and can basically meet the technical requirements of steel mills. the

Claims (2)

1. A steelmaking refining agent containing bamboo charcoal, characterized in that the parts by weight of its raw materials are: calcium fluoride 28-32, iron oxide 18-22, boron carbide 17-19, iron slag 15-17, bamboo charcoal 10-15, fluorite slag 6-8, hydrotalcite powder 20-25 and modified nano powder 3-5; Its preparation method comprises the following steps: (1) Crushing: use a crusher to crush each raw material separately; (2) Mixing: Mix the crushed raw materials according to the formula requirements, and mix them evenly with a ball mill; (3) Screening: Screen the uniformly mixed raw materials with a 150-mesh screen; (4) Drying: bake the sieved raw materials in an oven to remove moisture. The baking temperature is 90-120°C, and the baking time is controlled according to the degree of moisture volatilization; The preparation method of the modified nano-powder is as follows: melt the sepiolite powder at a temperature of 1600-1700°C, add iron powder equivalent to 2-4% of its weight, and 1-2% plant ash, stir evenly, and pour into in cold water, dried, and crushed into powder. 2. the steelmaking refining agent containing bamboo charcoal according to claim 1 is characterized in that the weight parts of its composition raw materials are: calcium fluoride 30, iron oxide 20, boron carbide 18, iron slag 16, bamboo charcoal 12, firefly Stone slag 7, hydrotalcite powder 22 and modified nanometer powder 4.