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Ni-Mg deoxidized block and preparation method thereof

A technology for magnesium deoxidation briquette and magnesium powder, which is applied in the field of iron and steel smelting to achieve the effects of improving properties and morphology, increasing solubility, and simplifying alloying processes

Active Publication Date: 2014-09-03
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of limitations in the production and use of traditional magnesium-containing deoxidizers, and propose a nickel-magnesium deoxidation briquette and its preparation method, which has the advantages of simplifying the production process, ensuring the deoxidation effect, and improving the safety performance of use. At the same time, it has the advantages of improving the properties of inclusions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh out following raw materials by following weight percentage: magnesium powder 60%, nickel powder 20%, all the other are iron powder, the particle size of described magnesium powder, nickel powder and iron powder are all 120 orders.

[0026] (2) Passivate the magnesium powder. Use NH with a concentration of 5g / L 4 F aqueous solution is used as a passivation solution, magnesium powder is added into the passivation solution, the passivation temperature is 71° C., and the passivation treatment time is 30 minutes. After passivation treatment, a passivation film with a thickness of 1.0-2.0 μm is formed on the surface of the material particles.

[0027] (3) The raw material powder and the binder are mechanically mixed in a mixer. The mixing time is 2.5 hours, the binder is carboxymethyl cellulose, and the addition amount accounts for 2% of the total amount of materials.

[0028] (4) It is pressed into a product by a double-roll press. The pressure of the roller pr...

Embodiment 2

[0032] (1) Weigh out following raw material by following weight percentage: magnesium powder 55%, nickel powder 25%, all the other are iron powder, the granularity of described magnesium powder, nickel powder and iron powder are all 200 orders.

[0033] (2) Passivate the magnesium powder. Use NH with a concentration of 6g / L 4 F aqueous solution is used as a passivation solution, magnesium powder is added into the passivation solution, the passivation temperature is 73°C, and the passivation treatment time is 32min. After passivation treatment, a passivation film with a thickness of 1.0-2.0 μm is formed on the surface of the material particles.

[0034] (3) The raw material powder and the binder are mechanically mixed in a mixer. The mixing time is 3 hours, the binder is carboxymethyl cellulose, and the addition amount accounts for 3% of the total weight of the total material.

[0035] (4) It is pressed into a product by a double-roll press. The pressure of the roller press...

Embodiment 3

[0039] (1) Weigh out following raw material by following weight percentage: magnesium powder 52%, nickel powder 33%, all the other are iron powder, the granularity of described magnesium powder, nickel powder and iron powder are all 270 orders.

[0040] (2) Passivate the magnesium powder. Use NH with a concentration of 8g / L 4 F aqueous solution is used as a passivation solution, magnesium powder is added into the passivation solution, the passivation temperature is 75°C, and the passivation treatment time is 35min. After passivation treatment, a passivation film with a thickness of 1.0-2.0 μm is formed on the surface of the material particles.

[0041] (3) The raw material powder and the binder are mechanically mixed in a mixer. The mixing time is 3.5 hours, the binder is carboxymethyl cellulose, and the addition amount accounts for 3.5% of the total amount of materials.

[0042] (4) It is pressed into a product by a double-roll press. The pressure of the roller press is 7...

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Abstract

The invention discloses a Ni-Mg deoxidized block and a preparation method thereof. The chemical components of the Ni-Mg deoxidized block comprise 10-60 wt% of magnesium powder, 30-80 wt% of nickel powder, and the balance consisting of iron powder. The preparation method comprises the following steps: passivating the magnesium powder, mechanically mixing the raw material powder with a binder in a mixer, and compacting with a double roll press to obtain a product. The compacted product is subject to drying and packaging for subsequent use. According to the invention, a mode of briquetting by using magnesium powder, nickel powder and iron powder is adopted herein, the yield rate of magnesium reaches 100 %, the production technology and alloying technology are simplified; by passivating the magnesium powder, adding a proper amount of the iron powder and adding a deoxidizer in molten steel, spray explosion phenomenon caused by high content of magnesium can be effectively avoided; the addition of nickel can increase the solubility of magnesium in steel, and the property and form of impurities can be improved as well as deep-deoxidizing the molten steel. The invention can be widely applied in the production of steel-making and casting.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, and relates to a steelmaking deoxidizer, in particular to a nickel-magnesium deoxidation briquette and a preparation method thereof. Background technique [0002] As users have more and more strict requirements on the quality of steel, in order to meet the needs of high strength, high life, corrosion resistance, and harsh conditions, the purity of molten steel must be greatly improved. The lower the total oxygen content in the steel, the less the number of non-metallic inclusions, the smaller the size, and the more uniform the distribution, the higher the purity level of the steel, the better the overall performance, the wider the use and the longer the service life . Magnesium has a strong deoxidation ability. Magnesium has a good deoxidation effect on molten steel deoxidation. Its deoxidation products are eliminated quickly, and the properties and shapes of the generated inclus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06
Inventor 尚德礼李德刚廖相巍康磊邓伟
Owner ANGANG STEEL CO LTD