Slag heat storage ball

A heat storage ball and carbon slag technology, which is applied in the field of iron and steel production, can solve the problems of high viscosity of mold slag, increased cost, and carbon increase, and achieve the effects of reducing surface tension fluctuations, reducing longitudinal cracks, and reducing steel surface embrittlement

Inactive Publication Date: 2017-02-22
河南鹏钰集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this technical solution: ① Use only tailings slag as the base material, and the dosage is too large, that is, 65-85%. Although it can save costs to a certain extent, it will cause the crystalline ore phases precipitated by cooling to become more complicated, making mold slag high viscosity
② In order to improve thermal insulation performance, slag forming speed and fluidity of slag, 2~8% acidified graphite and 5~25% powdered graphite are added to the mold flux, so that the carbon content of the mold flux is 6~15%. Although the problem of mold slag adding carbon to molten steel has been solved to a certain extent, compared with the current market demand for high-quality steel, further improvement is still urgently needed
③The addition of 5~25% fluorite and 5~20% solid water glass increases the cost on the one hand, and makes the mold flux contain a relatively high content of CaF 2 、Na 2 O and other surface active substances are easy to make the slag adsorb on the vessel wall and cause slag circle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation of the slag-melting thermal storage ball of the present invention can be carried out according to the following steps:

[0035] ① Ingredients: According to the raw material formula (mass parts) and material requirements, weigh 20 parts of rice husk, 23 parts of clay, 40 parts of graphite tailings, 15 parts of carbon residue, 2.0 parts of sodium carboxymethyl cellulose, and stir evenly to prepare got the mixture;

[0036] ② Humidification and stirring; add water to the mixture for humidification and stirring, and the amount of water added is 12% of the mass of the mixture;

[0037] ③Pelletization: Using conventional disc granulation technology, the humidified mixture is made into granules, and the particle size obtained is mostly 1~3mm;

[0038] ④Drying measurement: Dry the obtained particles at 60~62°C, and the moisture (Wt%) content after drying is ≤0.50%; screen out the particles with a particle size of 1~3mm, and measure the chemical composition of t...

Embodiment 2

[0040] The preparation of the slag-melting thermal storage ball of the present invention can be carried out according to the following steps:

[0041] ① Ingredients: According to the raw material formula (mass parts) and material requirements, weigh 20 parts of rice husk, 25 parts of clay, 38 parts of graphite tailings slag, 15 parts of carbon residue, 2.0 parts of sodium carboxymethyl cellulose, and stir evenly to prepare got the mixture;

[0042] ② Humidification and stirring; add water to the mixture for humidification and stirring, and the amount of water added is 13% of the mass of the mixture;

[0043] ③Granulation: Using conventional disc granulation technology, the humidified mixture is made into granules, and the particle size obtained is mostly 2~4mm;

[0044] ④Drying measurement: Dry the obtained granules at 62~64℃, and the moisture (Wt%) content after drying is ≤0.50%; screen out the granules with a particle size of 2~4mm, and measure the chemical composition of t...

Embodiment 3

[0046] The preparation of the slag-melting thermal storage ball of the present invention can be carried out according to the following steps:

[0047] ① Ingredients: According to the raw material formula (mass parts) and material requirements, weigh 26 parts of rice husk, 25 parts of clay, 33 parts of graphite tailings slag, 15 parts of carbon residue, 1.0 part of sodium carboxymethyl cellulose, and stir evenly to prepare got the mixture;

[0048] ② Humidification and stirring; add water to the mixture for humidification and stirring, and the amount of water added is 14% of the mass of the mixture;

[0049] ③Granulation: adopt conventional disc granulation technology to make granules from the humidified mixture, and the particle size of the obtained granules is mostly 3~5mm;

[0050] ④Drying measurement: Dry the obtained granules at 63~65℃, and the moisture (Wt%) content after drying is ≤0.50%; screen out the granules with a particle size of 3~5mm, and measure the chemical co...

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Abstract

The invention discloses a slugging heat storage ball. The ball comprises the following raw materials (wt%): 20 to 30% of rice husk, 10 to 25% of clay, 25 to 40% of graphite tailing slag, 5 to 20% of carbon slag and 0.5 to 2.0% of carboxymethylcellulose sodium. The raw materials cooperatively adjust the viscosity and melting temperature of the slugging heat storage ball. The slugging heat storage ball has reasonable composition, a proper melting temperature, a good heat insulation effect and good adsorption capability on occluded foreign substances and can guarantee smooth continuous casting steelmaking and improve production efficiency.

Description

technical field [0001] The invention belongs to the technical field of iron and steel production, and in particular relates to a heat storage ball for melting slag. Background technique [0002] Extra-furnace refining and continuous casting technology is playing an increasingly important role in steelmaking production and has become an important link in the modern metallurgical process. In the process of continuous casting, the temperature of molten steel cools down quickly, and low temperature is one of the main reasons hindering the smooth progress of continuous casting. Therefore, the adjustment and control of molten steel temperature has become a prominent problem. [0003] In recent years, various molten steel reheating technologies have emerged continuously. Among them, the chemical heating method has been paid attention to due to its advantages of simple operation, fast heating speed, low investment, and low cost, and has been widely used in major steel mills at home...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/111C21C7/00
CPCY02P10/20
Inventor 程卓高云强
Owner 河南鹏钰集团有限公司
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