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Method for continuously producing manganese nitride product

A manganese nitride and product technology, applied in chemical instruments and methods, nitrogen compounds, inorganic chemistry, etc., can solve the problems of uneven furnace temperature, no movement of materials, and high production costs, and achieve lower production costs, lower investment costs, The effect of shortened production time

Pending Publication Date: 2022-05-31
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the production technology of manganese nitride alloy in China is still very backward, and there are many problems. The nitriding reaction is carried out in a closed furnace, which cannot be continuously produced. The system is unreasonable, the nitrogen content of the product is low, the composition deviation is large, the production cost is high, and the export requirements cannot be met

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] After crushing about 1 ton of electrolytic manganese flakes to 80 mesh, adding 4wt% water glass, pressing it into a spherical shape, drying, and staying in a push-plate kiln at 800°C for 5 hours, where the temperature at the inlet end of the material is 800°C, and the temperature at the outlet end of the material is 150℃; the flow rate of nitrogen gas in the push-plate kiln is 180m 3 / h, the nitrogen content of the obtained manganese nitride ball product was 7.5wt% measured by the National Nonferrous Metals and Electronic Materials Analysis and Testing Center of Beijing Nonferrous Metal Research Institute.

Embodiment 2

[0034] Mix about 1 ton of 90wt% electrolytic manganese flakes, 3wt% metal manganese flakes and 7wt% ferromanganese and crush it to 60 mesh, add 3wt% water glass, press it into a spherical shape, dry it, and push the plate at 900°C After staying in the kiln for 2 hours, the nitrogen pressure in the pusher kiln was 100Pa. The nitrogen content of the obtained manganese nitride balls was 7.2wt% measured by the National Nonferrous Metals and Electronic Materials Analysis and Testing Center of Beijing Nonferrous Metal Research Institute.

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Abstract

The invention relates to a method for continuously producing a manganese nitride product, which comprises the following steps of: crushing electrolytic manganese sheets, manganese metal and ferromanganese, pressing and forming, placing the pressed and formed material in a pushed slab kiln or a tunnel kiln, introducing nitrogen or ammonia-nitrogen mixed gas into the pushed slab kiln or the tunnel kiln, and continuously producing the manganese nitride product. And heating in a pushed slab kiln or a tunnel kiln to 700-1000 DEG C to produce a manganese nitride product. The method has the advantages of no need of vacuumizing, continuous production, low energy consumption, small equipment investment, high production efficiency, short production time and the like. The nitrogen content of the obtained manganese nitride product is about 7-8wt%.

Description

technical field [0001] The invention belongs to the field of ferroalloy smelting, in particular to a method for continuous production of manganese nitride products. Background technique [0002] In the iron and steel industry, manganese is the second most important metal element after iron, and almost 90% of manganese is consumed in the iron and steel industry. When manganese is added alone, it is easy to be oxidized, and nitrogen is not easy to add due to its extremely small density. It is often necessary to add at the same time when smelting some alloys. Manganese nitride is not only conducive to the absorption of molten steel, but also makes the utilization rate of manganese and nitrogen elements higher. In recent years, people's understanding and utilization of nitrided alloys have become more in-depth and popular, and manganese nitride has been applied to many steel types such as structural steel, stainless steel, and heat-resistant steel. Especially in foreign countrie...

Claims

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Application Information

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IPC IPC(8): C01B21/06
CPCC01B21/0615
Inventor 王海娟刘勇储少军韩钰吴腾浩
Owner UNIV OF SCI & TECH BEIJING
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