Manganese nitride production method

A production method and technology of manganese nitride, applied in the direction of nitrogen-metal/silicon/boron binary compounds, etc., can solve the problems of low utilization rate of nitrogen, insufficient heat utilization, low utilization rate of nitrogen, etc., so as to improve the nitrogen content. The effect of improving and stabilizing quality, shortening production cycle

Inactive Publication Date: 2007-06-27
GUIZHOU ENERGY & MINERAL MANGANESE GRP CO LTD
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Problems solved by technology

The current production process has problems such as low nitrogen utilization rate, insufficient heat utilization, poor nitriding quality, instability, and high production costs.
[0003] Chinese patent ZL00134349.1 "A treatment method for purifying manganese nitride alloy with ultra-low impurity content" discloses a metal manganese nitriding process, which has the disadvantages of complex process, long production cycle, low nitrogen utilization rate, and production Disadvantages such as high cost

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with specific embodiments.

[0018] The invention adopts ammonia-nitrogen mixed nitrogen source, liquid ammonia is decomposed into nitrogen mixed gas by an ammonia gas decomposer (ammonia burning nitrogen-based atmosphere generator), and liquid nitrogen is gasified into gaseous nitrogen by a liquid nitrogen gasifier. A gas flow meter is installed at the outlet of the ammonia decomposer and the outlet of the liquid nitrogen vaporizer to control the flow. Through many tests, the present invention selects and accounts for 25~35% by weight liquid ammonia, and liquid nitrogen accounts for 75~65%, especially ammonia accounts for 30%, and nitrogen accounts for 70% effect best, accordingly, calculate respectively in the following The flow that should be passed during operation.

[0019] The specific operation is as follows:

[0020] 1. The raw material is electrolytic manganese flakes, crushed into...

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Abstract

The invention discloses a manganese nitride generation method based on ammonia nitrogen, which comprises the following steps: (1) optimizing the ammonia nitrogen rate with 25-35% ammonia and 75-65% nitrogen (30% ammonia and 70% nitrogen is the best); (2) charging material in the stove; (3) nitriding for the second time and filling argon gas; (4) sintering at high temperature without briquette modeling through adhesive in advance.

Description

technical field [0001] The present invention relates to the binary compound of nitrogen and metal, in particular to the preparation method of the alloy based on manganese nitride. Background technique [0002] The methods for preparing manganese nitride in the prior art all utilize the properties of metal manganese to absorb nitrogen at high temperatures; as the nitrogen source, there are currently 1, decomposing with a single ammonia, 2, using a single nitrogen as a nitrogen source, 3, using Ammonia nitrogen mixed as nitrogen source; in the actual production process, the manganese powder is first pressed into shape, and then put into the furnace for nitriding. The current production process has problems such as low nitrogen utilization rate, insufficient heat utilization, poor nitriding quality, instability, and high production cost. [0003] Chinese patent ZL00134349.1 "A treatment method for purifying manganese nitride alloy with ultra-low impurity content" discloses a m...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C01B21/06C22C29/16
Inventor刘廷军
OwnerGUIZHOU ENERGY & MINERAL MANGANESE GRP CO LTD