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Continuously producing method for compounds containing carbon or nitrogen and its producing equipment

A nitrogen compound and production method technology, applied in nitrogen-metal/silicon/boron binary compounds, vanadium compounds, chemical instruments and methods, etc., can solve the problems of low labor productivity in the reaction cycle, high equipment investment, large equipment loss, etc. , to achieve the effect of shortening the preparation cycle, high heat exchange efficiency and reducing equipment investment

Inactive Publication Date: 2010-05-12
隋智通
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has strict requirements on the reaction equipment, high temperature strength of equipment materials; it cannot run continuously, and the preparation process is too long; the long reaction cycle leads to low labor productivity, high energy consumption, large equipment loss, and high equipment investment. High production cost and low product competitiveness
[0007] (3) as CN1194888C discloses a kind of " production method of vanadium nitride ", it uses powdery V 2 o 3 And graphite as raw material, polyvinyl alcohol aqueous solution as binder, after mixing, briquetting, forming, then put the formed material into the pusher kiln or tunnel kiln type device, and feed nitrogen or ammonia gas to react at the same time and protective gas, and react at 1000-1800°C for 2-6 hours to produce a vanadium nitride alloy containing 77-81% vanadium and 1-8% nitrogen. This process is not a continuous production process in the strict sense, and because it cannot Control the damage caused by the erosion of the reaction furnace by raw material impurities at high temperature, resulting in unstable production. In addition, it can only use V 2 o 3 resulting in a narrow selection of raw materials
These methods actually involve discontinuous production; at the same time, the application of high-power, industrialized microwave ovens and microwave technology in industry is not stable enough, which is also one of the reasons that affect the realization of industrialized production.

Method used

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  • Continuously producing method for compounds containing carbon or nitrogen and its producing equipment
  • Continuously producing method for compounds containing carbon or nitrogen and its producing equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0029] Preparation of vanadium nitride from ammonium vanadate

[0030] After drying and grinding the ammonium vanadate through a standard sieve, select the ammonium vanadate with a particle size of 120 mesh and add a reducing agent. The present embodiment selects elemental graphite as the reducing agent, and its dosage is based on the following reaction equation (2HN 4 VO 3 +6C+1 / 2N 2 =VC+VN+2NH 3 +H 2 O+5CO) as the basis, prepared according to the chemical reaction stoichiometric ratio, and properly adjusted the amount of carbon, after adding 5% density enhancer Mn, with 5% starch, fully mixed, and then passed through the pelletizer to form particles of a certain size, fully After drying, it is stored in the reaction silo. The oxygen content in the apparatus was removed by vacuum pumping. The raw material enters the rotary kiln reactor through the metering device to control the feed amount, and at the same time flows nitrogen gas with a flow rate of 0.05m 3 .h -1 .kg ...

Embodiment approach 2

[0032] Preparation of vanadium nitride from vanadium trioxide

[0033] Select particle size to be 140 object vanadium trioxides and add active carbon reductant, its allocation is according to following reaction equation (V 2 o 3 +4C+1 / 2N 2 =VC+VN+3CO) as the basis, prepared according to the stoichiometric ratio, and properly adjusted the amount of carbon, after adding 3% density enhancer Fe, with 2% binder polyvinyl alcohol, fully mixed and passed through pelletizing Machine into particles of a certain size, fully dried and stored in the reaction silo. The oxygen content in the apparatus was removed by vacuum pumping. The raw material enters the rotary kiln reactor through the metering device to control the feed amount, and at the same time flows nitrogen gas with a flow rate of 0.2m 3 .h -1 .kg -1 , by adjusting the rotational speed and inclination angle of the rotary kiln to control the moving speed of the material in the rotary kiln reactor, the average residence time...

Embodiment approach 3

[0035] Preparation of vanadium nitride from vanadium pentoxide

[0036] The vanadium pentoxide after drying and grinding is screened by a standard sieve, and the vanadium pentoxide with a particle size of 120 mesh is selected to add a reducing agent. The present embodiment selects elemental graphite reductant, and its dosage is according to following reaction equation (V 2 o 5 +6C+1 / 2N 2 =VC+VN+5CO) as the basis, prepared according to the stoichiometric ratio of the chemical reaction, and properly adjusted the amount of carbon, fully sieved and mixed by the vibrating screen, and stored in the raw material warehouse. The oxygen content in the apparatus was removed by vacuum pumping. The raw material enters the rotary kiln reactor through the metering device to control the feed amount, and at the same time flows nitrogen gas with a flow rate of 0.15m 3 .h -1 .kg -1 , by adjusting the speed and inclination of the rotary furnace to control the movement speed of the material ...

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Abstract

The present invention is continuous producing process and equipment for compounds containing carbon or nitrogen. Mixed material is fed to the rotary furnace and made to pass through the preheating zone, pre-reducing zone, main reaction zone and product cooling zone under the controlled temperature condition. Meanwhile, gas is introduced into the rotary furnace in the reverse direction to the mixedmaterial, so as to produce carbon or nitrogen containing compound(s). The production equipment has no vacuum device. The present invention has low investment, simplified technological process, shortpreparing period, high product quality, high heat efficiency and low power consumption.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, and relates to a preparation method of nitrogen (carbon) vanadium, in particular to a continuous production method of carbon-containing or nitrogen-containing compounds and a production device thereof. Background technique [0002] It is well known that vanadium nitrogen (carbon) is applied in high-strength low-alloy steel, which can effectively strengthen and refine grains. Under the specified strength level, adding nitrogen in steel can save the amount of vanadium. Compared with adding nitrogen-rich ferromanganese, calcium cyanamide, ferrovanadium nitride or blowing nitrogen, the application of vanadium nitride has higher economic benefits and has been Widely used in the steel industry. [0003] Domestic and foreign patent documents US3334992, US3745209, US4040814, US4562057, and CN1194888C disclose some methods for preparing vanadium nitride. The present inventor ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/06C01B31/30C01G31/00
CPCY02P20/10
Inventor 隋智通付念新于三三张力
Owner 隋智通