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Method for preparing high-purity ferrophosphorus

A ferrophosphorus, high-purity technology is applied in the field of preparation of high-purity ferrophosphorus, which can solve the problems of less research on the detitanium and manganese removal of ferrophosphorus, and achieve the effects of short reaction time, high product purity, and easy industrialization.

Active Publication Date: 2020-11-24
LINYING YUZHONG FERROALLOYS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the field of alloy refining, there are few studies on the process of removing titanium and manganese from ferrophosphorus

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] The preparation method of this high-purity ferrophosphorus adopts the following process steps: (1) using ferrophosphorus as a raw material, the mass content of the main components in the ferrophosphorus is: 20% to 30% of phosphorus, 1.2% to 2.3% of titanium, and 1.6% of manganese ~3.0%, vanadium 0.16~0.38%.

[0014] (2) Add ferrophosphorus and slagging agent in the induction furnace, the mass ratio of ferrophosphorus and slagging agent is 10:1~10:3; the quality requirement of the components in the slagging agent is: FeO 70~80% , SiO 2 3-8%, CaO 2-5%, and the rest are impurities; the alkalinity in the slagging agent R=CaO / SiO 2 = 0.25 to 1.67. The slagging agent is selected from one or more of iron ore, magnetite ore, iron oxide scale, sintered ore, silica and fluorite.

[0015] (3) Refining is carried out at 1300-1550° C. after the melting of the ferrophosphorus and slagging agent, and the refining time is 20-40 minutes.

[0016] (4) The refined ferrophosphorus is ...

Embodiment 1

[0017] Embodiment 1: The preparation method of this high-purity ferrophosphorus adopts the following specific techniques.

[0018] (1) Using ferrophosphorus as a raw material, the mass content of main components in the ferrophosphorus is: 27.8% phosphorus, 1.9% titanium, 2.8% manganese, and 0.24% vanadium.

[0019] (2) Add ferrophosphorus and slagging agent in the induction furnace, the mass ratio of ferrophosphorus and slagging agent is 10:2; In the described slagging agent, the composition content is: FeO 75wt%, SiO 2 6wt%, CaO 3wt%, the rest are impurities, basicity R=0.5.

[0020] (3) After the ferrophosphorus and slagging agent are melted, refining is carried out at 1400° C., and the refining time is 30 minutes.

[0021] (4) The refined ferrophosphorus is taken out of the furnace, cooled, and the upper slag is separated to obtain the high-purity ferrophosphorus. The mass content of main components in the high-purity ferrophosphorus is: phosphorus 23.55%, titanium 0.04%...

Embodiment 2

[0022] Embodiment 2: The preparation method of this high-purity ferrophosphorus adopts the following specific techniques.

[0023] (1) Using ferrophosphorus as raw material, the mass content of main components in the ferrophosphorus is: 25.2% phosphorus, 1.7% titanium, 2.1% manganese, and 0.28% vanadium.

[0024] (2) Add ferrophosphorus and slagging agent in the induction furnace, the mass ratio of ferrophosphorus and slagging agent is 10:1.5; In the described slagging agent, the composition content is: FeO 77wt%, SiO 2 4wt%, CaO 4.5wt%, the rest are impurities, basicity R=1.1.

[0025] (3) After the ferrophosphorus and slagging agent are melted, refining is carried out at 1500° C., and the refining time is 30 minutes.

[0026] (4) The refined ferrophosphorus is taken out of the furnace, cooled, and the upper slag is separated to obtain the high-purity ferrophosphorus. The mass content of main components in the high-purity ferrophosphorus is: phosphorus 22.47%, titanium 0.0...

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PUM

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Abstract

The invention discloses a method for preparing high-purity ferrophosphorus. The method comprises the following steps of adding the ferrophosphorus and a slagging constituent into an induction furnace,and refining to obtain the high-purity ferrophosphorus; and the slagging constituent comprises the following components in percentage by weight: 70% to 80% of FeO, 3% to 8% of SiO2, 2% to 5% of CaO and the balance impurities. According to the method of the invention, the slagging constituent is adopted for refining, and titanium and manganese in the ferrophosphorus can be effectively removed; andthe slagging constituent is mainly iron oxide, and phosphorus is not removed during refining, so that phosphorus is maintained while titanium and manganese are effectively removed, and the effects ofremoving impurities and retaining phosphorus are achieved. The induction furnace is adopted for smelting, the alkalinity of the slagging constituent is low, and the refining requirement can be achieved without oxygen blowing in the smelting process. The method can effectively remove impurity elements such as titanium, manganese and vanadium in the ferrophosphorus, and has the advantages of beinghigh in product purity, short in flow, short in reaction time, simple in operation, easy to industrialize and the like.

Description

technical field [0001] The invention relates to an alloy smelting method, in particular to a method for preparing high-purity ferrophosphorus. Background technique [0002] As a new type of energy-saving and environment-friendly soft magnetic material, iron-based amorphous alloy has the characteristics of high magnetic permeability, high magnetic induction intensity and high resistivity compared with traditional electrical steel and other crystalline soft magnetic materials. Indispensable important material for machinery and military industry. The no-load loss of the iron-based amorphous alloy is about 75% lower than that of the electrical steel core transformer, and the no-load current is about 80% lower. In 2018, the consumption of ordinary electrical steel in my country has exceeded 10 million tons. Realizing the substitution of iron-based amorphous alloys for electrical steel plays an important role in the energy saving of my country's power grid system. [0003] The e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C35/00C22C33/06
CPCC22C35/005C22C33/06C22C33/003
Inventor 王勇齐涛常朝芦永军樊安定韩飞
Owner LINYING YUZHONG FERROALLOYS