Preparation method of ferrochromium-molybdenum alloy

A molybdenum alloy and ferrochromium technology is applied in the field of preparation of ferrochromium molybdenum alloy, which can solve the problem of high production cost and achieve the effects of reducing power consumption for smelting, uniform ingredients and low price

Inactive Publication Date: 2018-08-10
YANCHENG XINYANG ELECTROTHERMAL MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the current direct alloying technology for high-carbon ferrochromium with molybdenum oxide is not yet mature enough, and the industry is still exploring the realization scheme. The common problem of existing schemes is the high production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] A preparation method of chromium-iron-molybdenum alloy, comprising the steps of:

[0020] Step (1): Grinding the molybdenum ore containing sulfur and cobalt;

[0021] Step (2): Uniformly mixing the ground molybdenum ore with chromite powder and reinforcing agent, adding water to perform briquetting treatment to obtain pellets, and drying the pellets;

[0022] Step (3): uniformly put the dried pellets into a rotary hearth furnace for high-temperature reduction to obtain metallized pellets;

[0023] Step (4): Grinding the metallized pellets again, then adding a hololytic agent, performing high-temperature reduction again, melting and separating at high temperature, and obtaining chromium-iron-molybdenum alloy.

[0024] Preferably, in step (2), the mass ratio of molybdenum ore to chromite powder is 1:44-1:46, and the mass ratio of molybdenum ore to reinforcing agent is 1:0.1-1:2. Further, the mass ratio of molybdenum ore to chromite powder is 1:45, and the mass ratio of ...

Embodiment 1

[0032] Embodiment one, step (1): grind molybdenite; Step (2): grind molybdenite and chromite powder, particle size is 5 nanometers reinforcing agent: Cr 3 C 2 Mix evenly according to the mass proportion of 1:44:1, add water to carry out pressure ball forming treatment to obtain pellets, and dry the pellets; step (3): put the dried pellets evenly into the bottom of the rotary Carry out high-temperature reduction in the furnace at 1600 degrees Celsius for 60 minutes to obtain metallized pellets; step (4): grind the metallized pellets again, and then add all-analysis agent: ketone, perform high-temperature reduction again, and reduce The time is 20 minutes, the high temperature is melted and separated, and the chromium-iron-molybdenum alloy is obtained.

Embodiment 2

[0033] Embodiment two, step (1): the molybdenite is carried out grinding process; Step (2): the molybdenite after the grinding and chromite powder, particle size are the strengthening agent of 15 nanometers: Fe 3 Al is uniformly mixed according to the mass proportion of 1:45:0.1, and water is added to carry out pressure ball molding treatment to obtain pellets, and the pellets are dried; step (3): put the dried pellets evenly into the Carry out high-temperature reduction at 1800 degrees Celsius in the hearth furnace for 80 minutes to obtain metallized pellets; step (4): grind the metallized pellets again, then add all-analysis agent: organic acid, and perform high-temperature reduction again , the reduction time is 30 minutes, high temperature melting and separation, and the chromium-iron-molybdenum alloy is obtained.

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Abstract

The invention relates to a preparation method of a ferrochromium-molybdenum alloy. The preparation method comprises the following steps that (1), molybdenum ore containing sulfur and cobalt is finelyground; (2), the finely ground molybdenum ore is uniformly mixed with ferrochromium fine ore and a fortifier, water is added, pelletizing moulding treatment is carried out so as to obtain pellets, andthe pellets are dried; (3), the dried pellets are uniformly put in a rotary hearth furnace for high-temperature reduction, and thus metallized pellets are obtained; and (4), the metallized pellets are ground again, a whole precipitant is added, the high-temperature reduction is carried out again, high-temperature smelting separation is carried out, and thus the ferrochromium-molybdenum alloy is obtained.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a preparation method of a chromium-iron-molybdenum alloy. Background technique [0002] The structure and properties of the constituent phases in the alloy play a decisive role in the performance of the alloy. At the same time, changes in the structure of the alloy, that is, the relative number of phases in the alloy, the grain size, shape and distribution of each phase, also affect the performance of the alloy. big impact. Therefore, the combination of various elements is used to form various alloy phases, and then through appropriate treatment, various performance requirements may be met. [0003] As an alloying element of steel, molybdenum can improve the strength of steel, especially high temperature strength and toughness; improve the corrosion resistance of steel in acid-base solution and liquid metal; improve the wear resistance of steel and improve ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/06C22C30/00C22C1/02C22B1/24C22B5/02
CPCC22B1/2406C22B5/02C22C1/02C22C27/06C22C30/00C22C38/22
Inventor 郭小芳郭健郭乃林
Owner YANCHENG XINYANG ELECTROTHERMAL MATERIAL CO LTD
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