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A method for combining microwave pre-roasting and submerged arc furnace to produce ferromanganese alloy

A technology of ferromanganese alloy and joint production, which is applied in the field of microwave pre-roasting and submerged arc furnace joint production of ferromanganese alloy, can solve the problems of large load of smelting furnace, low productivity, easy material collapse, etc., and achieves improved productivity and fast heating rate. , to avoid the effect of collapse

Active Publication Date: 2017-07-28
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the existing ore cold material into the furnace to smelt ferromanganese alloy, the smelting furnace load is large, the productivity is not high, and the phenomenon of material collapse and splashing is easy to occur during the production process. It needs large pieces of ore or sintered, cooled, crushed and screened before it can be used. For the problem of small particle size ore, provide a method of microwave pre-roasting combined with submerged arc furnace to produce ferromanganese alloy

Method used

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  • A method for combining microwave pre-roasting and submerged arc furnace to produce ferromanganese alloy
  • A method for combining microwave pre-roasting and submerged arc furnace to produce ferromanganese alloy

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Effect test

Embodiment 1

[0028] The method for producing ferromanganese alloy in conjunction with microwave pre-roasting and submerged arc furnace, its specific steps are as follows:

[0029] Step 1. First, crush manganese ore and carbonaceous reducing agent to a particle size of 5-30mm and 1-20mm, and then mix the crushed manganese ore and carbonaceous reducing agent uniformly according to the mass ratio of 65:35 to obtain a mixed material; wherein Manganese ore includes the following mass percentage components: Mn 2 o 3 35.21%, Fe 3 o 4 5.6%, CaCO 3 25%; carbonaceous reducing agent is petroleum coke;

[0030] Step 2. Heat the mixed material obtained in step 1 to 750°C for 50 minutes under microwave conditions to obtain a hot material with no sintering and low pulverization rate maintained at 721°C. The hot material has no moisture and carbonic acid Salt decomposition rate and high-valent manganese oxide reduction rate reached 71%;

[0031] Step 3. Then put the hot material obtained in step 2 i...

Embodiment 2

[0033] like figure 1 Shown, this microwave pre-roasting and submerged arc furnace are combined to produce the method for ferromanganese alloy, and its concrete steps are as follows:

[0034] Step 1, first crushing manganese ore and carbonaceous reducing agent to a particle size of 5-50mm, 1-10mm, and then mixing the crushed manganese ore and carbonaceous reducing agent according to the mass ratio of 70:30 to obtain a mixed material; wherein Manganese ore includes the following mass percentage components: Mn 2 o 3 44.51%, Fe 3 o 4 7.43%, CaCO 3 24.54%; carbonaceous reducing agent is coke;

[0035] Step 2. Heat the mixed material obtained in step 1 to 850°C for 40 minutes under microwave conditions to obtain a hot material with no sintering and low pulverization rate maintained at 821°C. The hot material has no moisture and carbonic acid The salt decomposition rate and the high-valent manganese oxide reduction rate reach 81%; the microwave pre-roasting process is carried o...

Embodiment 3

[0038] like figure 1 Shown, this microwave pre-roasting and submerged arc furnace are combined to produce the method for ferromanganese alloy, and its concrete steps are as follows:

[0039]Step 1. First, crush the manganese ore and carbonaceous reducing agent to a particle size of 5-80mm and 1-30mm, and then mix the crushed manganese ore and carbonaceous reducing agent uniformly according to the mass ratio of 72:28 to obtain a mixed material; wherein Manganese ore includes the following mass percentage components: Mn 2 o 3 37.19%, Fe 3 o 4 6.32%, CaCO 3 26.42%; carbonaceous reducing agent is coal;

[0040] Step 2. Heat the mixed material obtained in step 1 to 900°C for 25 minutes under microwave conditions to obtain a hot material with no sintering and low pulverization rate maintained at 821°C. The hot material has no moisture and carbonic acid The salt decomposition rate and the high-valent manganese oxide reduction rate reach 81%; the microwave pre-roasting process i...

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Abstract

Belonging to the technical field of microwave metallurgy and manganese-iron alloy smelting, the invention relates to a method for microwave pre-roasting and submerged arc furnace combined production of manganese-iron alloy. The method includes: crushing manganese ore and a carbonaceous reducing agent, then mixing them evenly to obtain a mixed material; pre-roasting the mixed material under microwave condition to obtain a hot material; and then placing the obtained hot material into a submerged arc furnace, adding coke and conducting heating in the submerged arc furnace to 1450-1550DEG C to perform smelting, thus obtaining the manganese-iron alloy. In the microwave pre-roasting process, microwave heating can be carried out in a microwave shaft furnace. The method has short production cycle and low energy consumption, and can properly solve various harmful phenomena caused by charging of cold materials into the furnace.

Description

technical field [0001] The invention relates to a method for combining microwave pre-roasting and submerged arc furnace to produce ferromanganese alloy, belonging to the technical field of microwave metallurgy and ferromanganese alloy smelting. Background technique [0002] In modern industry, ferromanganese alloy has a very important strategic position. Ferromanganese alloys are widely used in the manufacturing of steel and stainless steel, with a consumption of 0.8-0.9% of steel production, which accounts for 85-90% of the total manganese demand. [0003] The current main industrial production process of manganese ferroalloy is to put the "cold material" of carbon-containing manganese ore directly into blast furnace or submerged arc furnace for smelting. The advantage of this process is that if a large ore (50-80mm) with a higher price is used, relatively less auxiliary equipment is required. But it has serious defects: the load of the smelting furnace is large, the prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B4/06C22B1/02
Inventor 彭金辉叶乾旭陈菓张利波杨大锦朱红波普靖中李磊
Owner KUNMING UNIV OF SCI & TECH
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