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Method for preparing continuous casting protection slag from using blast furnace water slag

A technology for continuous casting mold slag and blast furnace slag, which is applied in the field of blast furnace slag to prepare continuous casting mold slag, which can solve the problems of cumbersome process, high equipment cost, and difficulty in project approval and production, and achieve national resource saving, low production cost, and high technological efficiency. The effect of short process

Inactive Publication Date: 2011-01-19
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current utilization of blast furnace slag requires high equipment costs and cumbersome processes, making it difficult to establish a project and put it into production
Due to reasons such as metallurgical process or raw materials, the composition of blast furnace slag is complex, which is not conducive to the development and utilization of blast furnace slag
The resource utilization of blast furnace slag is prone to secondary pollution problems, and there is a bad cycle phenomenon of using waste to generate waste
In recent years, the resource utilization of blast furnace slag in my country has developed rapidly, but compared with developed countries, there is still a significant gap in the recycling level of blast furnace slag in my country
Moreover, even if all the research projects on resource utilization of blast furnace slag in my country are put into production, the resource of blast furnace slag cannot be fully utilized.

Method used

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  • Method for preparing continuous casting protection slag from using blast furnace water slag
  • Method for preparing continuous casting protection slag from using blast furnace water slag
  • Method for preparing continuous casting protection slag from using blast furnace water slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Main material: blast furnace slag

[0026] Auxiliary materials: fluorite, soda ash, wollastonite, carbonaceous materials

[0027] The mass percentage of raw materials is shown in Table 3

[0028] Table 3 Mold flux composition ratio

[0029] blast furnace slag

carbonaceous material

wollastonite

soda ash

fluorite

50％

2.5％

20％

17.25％

10.25％

[0030] Preparation:

[0031] (1) Pulverization: Pulverize the blast furnace slag, fluorite, soda ash, wollastonite and carbonaceous materials among the above raw materials into particles of 0.1-1mm.

[0032] (2) Mixing: Mix the pulverized granules in proportion and mix thoroughly.

[0033] (3) Pulping: add 15% to 45% water to the mixed raw materials to make slurry.

[0034] (4) Drying: After direct drying in a high-temperature furnace at 300°C to 500°C, the finished powdery continuous casting mold powder can be obtained, or use a disc granulator to spray granulate, and d...

Embodiment 2

[0037] Main material: blast furnace slag

[0038] Auxiliary materials: fluorite, soda ash, wollastonite, carbonaceous materials

[0039] The mass percentage of raw materials is shown in Table 4

[0040] Table 4 Mold flux composition ratio

[0041] blast furnace slag

carbonaceous material

wollastonite

soda ash

fluorite

43％

4.5％

25％

17.25％

10.25％

[0042] Preparation:

[0043] (1) Pulverization: Pulverize the blast furnace slag, fluorite, soda ash, wollastonite and carbonaceous materials among the above raw materials into particles of 0.1-1mm.

[0044] (2) Mixing: Mix the pulverized granules in proportion and mix thoroughly.

[0045] (3) Pulping: add 15% to 45% water to the mixed raw materials to make slurry.

[0046] (4) Drying: After direct drying in a high-temperature furnace at 300°C to 500°C, the finished powdery continuous casting mold powder can be obtained, or use a disc granulator to spray granulate, and d...

Embodiment 3

[0049] Main material: blast furnace slag

[0050] Accessories: fluorite, soda ash, carbonaceous materials

[0051] The mass percentage of raw materials is shown in Table 5

[0052] Table 5 Mold flux composition ratio

[0053] blast furnace slag

carbonaceous material

fluorite

soda ash

65

3.6

10.12

21.28

[0054] Preparation:

[0055] (1) Pulverization: Pulverize the blast furnace slag, fluorite, soda ash and carbonaceous materials among the above raw materials into particles of 0.1-1 mm.

[0056] (2) Mixing: Mix the pulverized granules in proportion and mix thoroughly.

[0057] (3) Pulping: add 15% to 45% water to the mixed raw materials to make slurry.

[0058] (4) Drying: After direct drying in a high-temperature furnace at 300°C to 500°C, the finished powdery continuous casting mold powder can be obtained, or use a disc granulator to spray granulate, and dry it in a high-temperature furnace at 500°C to 900°C After roas...

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Abstract

The invention relates to a method for preparing continuous casting mold flux by use of blast furnace granulating slag, which comprises the process steps, such as crushing, mixing, pulping, and drying. The preparation method for continuous casting mold flux has the advantages of low costs of raw materials, simple process, no danger of secondary pollution during production and application, and higher recovery and utilization rate of the blast furnace granulating slag. Moreover, the preparation method can be used to appropriately adjust the proportion of raw materials according to the different technological requirements of the continuous casting of different steel grades, so as to obtain the continuous casting mold fluxes with varied components.

Description

technical field [0001] The invention relates to the comprehensive utilization of industrial waste, in particular to the technical field of non-metallic material processing, in particular to the preparation of continuous casting mold slag by blast furnace water slag. Background technique [0002] Blast furnace slag is a by-product discharged from the blast furnace when smelting pig iron. There are two main methods of slag treatment after the separation of slag and iron: one is the dry slag method, and the other is the water quenching method. Using the dry slag method to treat blast furnace slag has serious environmental pollution, high cost and low resource utilization rate. It is rarely used now. Generally, dry slag pits or slag tanks are set up only for accident handling. At present, the blast furnace slag treatment mainly adopts the water quenching method. The basic principle of this process is to use a certain pressure and flow of water to turn the molten slag into a spo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/111
Inventor 刘承军孙丽枫宋智芳姜茂发
Owner NORTHEASTERN UNIV LIAONING
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