Method for continuously producing manganese nitride product

A manganese nitride and product technology, which is applied in the direction of nitrogen-metal/silicon/boron binary compounds, can solve the problems of uneven furnace temperature, no movement of materials, and high production costs, so as to reduce production costs, reduce investment costs, The effect of shortened production time

Inactive Publication Date: 2015-07-15
JILIN MECHANICAL & ELECTRICAL EQUIP
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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

[0016] Embodiment 1, the steps are as follows:

[0017] 1) After crushing 1 ton of electrolytic manganese flakes to 40 mesh, add water glass at a ratio of 3 wt% to press into a Φ3cm spherical shape;

[0018] 2) Raise the temperature and pressure of the push plate kiln or tunnel kiln, the temperature range is 800°C, and always maintain a positive pressure of 100Pa, the temperature at the inlet end of the push plate kiln or tunnel kiln is high, and the temperature at the outlet end is low;

[0019] 3) Place the material obtained in step 1) in a pusher kiln or a tunnel kiln, and at the same time feed nitrogen or ammonia-nitrogen mixed gas into the pusher kiln or tunnel kiln. Pressure, access time 2h;

[0020] 4) Take the material from step 3) out of the kiln and cool it to 100°C under the protection of nitrogen. The obtained manganese nitride ball product has a nitrogen content of 7.5wt as measured by the National Nonferrous Metals and Electronic Materials Analysis and Testing C...

Embodiment 2

[0021] Embodiment 2, the steps are as follows:

[0022] 1) After crushing 1 ton of electrolytic manganese flakes to 120 mesh, add water glass at a ratio of 4wt% to press a spherical shape of Φ4cm;

[0023] 2) Raise the temperature and pressure of the push plate kiln or tunnel kiln, the temperature range is 900°C, and always maintain a positive pressure of 550Pa, the temperature at the inlet end of the push plate kiln or tunnel kiln is high, and the temperature at the outlet end is low;

[0024] 3) Place the material obtained in step 1) in a pusher kiln or a tunnel kiln, and at the same time feed nitrogen or ammonia-nitrogen mixed gas into the pusher kiln or tunnel kiln. Positive pressure, access time 5h;

[0025] 4) Take the material from step 3) out of the kiln, and cool it to 125°C under the protection of nitrogen. The obtained manganese nitride ball product has a nitrogen content of 7.2wt as measured by the National Nonferrous Metals and Electronic Materials Analysis and T...

Embodiment 3

[0026] Embodiment 3, the steps are as follows:

[0027] 1) After crushing 1 ton of electrolytic manganese flakes to 200 mesh, add water glass at a ratio of 5wt% to press a spherical shape of Φ5cm;

[0028] 2) Raise the temperature and pressure of the push plate kiln or tunnel kiln, the temperature range is 1000°C, and always maintain a positive pressure of 1000Pa, the temperature at the inlet end of the push plate kiln or tunnel kiln is high, and the temperature at the outlet end is low;

[0029] 3) Place the material prepared in step 1) in the pusher kiln or tunnel kiln, and at the same time, feed nitrogen or ammonia-nitrogen mixed gas into the pusher kiln or tunnel kiln. Pressure, access time 8h;

[0030] 4) Take the material from step 3) out of the kiln, and cool it to 150 °C under the protection of nitrogen. The obtained manganese nitride ball product has a nitrogen content of 7.3wt as measured by the National Nonferrous Metals and Electronic Materials Analysis and Testin...

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PUM

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Abstract

The invention relates to a method for continuously producing a manganese nitride product, which is characterized by comprising the following steps: 1) crushing at least one of electrolytic manganese sheet, manganese metal and manganese iron, proportionally adding an adhesive, and pressing into balls; 2) enhancing the temperature and pressure of a pusher kiln or tunnel kiln, wherein the following conditions are always kept: the pressure is positive at 100-10000Pa, and the pusher kiln or tunnel kiln has high temperature at the inlet end and low temperature at the outlet end; 3) putting the material prepared in the step 1) into the pusher kiln or tunnel kiln while introducing nitrogen or an ammonia-nitrogen gas mixture into the pusher kiln or tunnel kiln for 2-8 hours; and 4) discharging the material prepared in the step 3) out of the kiln, and cooling in a nitrogen protective atmosphere.

Description

technical field [0001] The invention belongs to the field of ferroalloy smelting, relates to a ferroalloy nitriding production process, and is a method for continuously producing manganese nitride products. Background technique [0002] In the iron and steel industry, manganese is the second most important metal element after iron. Almost 90% of manganese is consumed in the iron and steel industry. There is a saying that "no manganese can't make steel". When manganese is added alone, it is very easy to oxidize, and nitrogen is not easy to add because of its extremely small density. It is often added at the same time when smelting some alloys. Manganese nitride is not only conducive to the absorption of molten steel, but also increases the utilization rate of manganese and nitrogen elements. In recent years, people's understanding and utilization of nitrided alloys has become more in-depth and popular. Manganese nitride has been used in many steel types such as structural ste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/06
Inventor 王海娟杨景军贾强
Owner JILIN MECHANICAL & ELECTRICAL EQUIP
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