Unlock instant, AI-driven research and patent intelligence for your innovation.

System and method for preparing TiN, TiC and TiCN powder in fluidized bed

A fluidized bed and powder technology, which is applied in the fields of materials and chemicals, can solve the problems of lack of low-cost and high-efficiency complete sets of processes, and achieve the effects of controllable shape, simple process, and economical raw materials

Active Publication Date: 2019-08-23
INST OF PROCESS ENG CHINESE ACAD OF SCI
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In summary, although there are many methods to prepare TiN, TiC, TiCN powders, there is a lack of a complete set of processes that can meet the low-cost and high-efficiency preparation of TiN, TiC, and TiCN powders in the industry.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • System and method for preparing TiN, TiC and TiCN powder in fluidized bed
  • System and method for preparing TiN, TiC and TiCN powder in fluidized bed
  • System and method for preparing TiN, TiC and TiCN powder in fluidized bed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] combine figure 1 , the system for preparing TiN, TiC, and TiCN powders used in this example includes a powder feeding device 1, a TiCl 4 Evaporation device 2, heating device 2-1, pre-reaction fluidized bed 3, first cyclone separation device 4, first high-temperature dust removal device 5, evaporation reaction fluidized bed 6, powder recovery device 7, deposition reaction fluidized bed 8 , the second cyclone separation device 9, the second high temperature dedusting device 10, the first water cooling device 11, the powder collecting device 12, the second water cooling device 13, TiCl 4 Recovery device 14, tail gas treatment device 15;

[0051] The air inlet at the bottom of the powder feeding device 1 is connected to the inert gas pipeline through an air valve and the pipeline; The valve is connected to the pipeline; the feed port of the powder feeding device 1 is connected to the discharge port of the powder recovery device 7 through the material valve and the pipelin...

Embodiment 2

[0061] In this embodiment, the method for preparing TiN, TiC, and TiCN powders using the system in the above-mentioned embodiment 1 specifically includes the following steps:

[0062] After the titanium-containing powder is cleaned by inert gas in the powder feeding device 1, it is transported to the pre-reaction fluidized bed 3 through a material valve; hydrogen and inert gas pass through the TiCl 4 Evaporation device 2 gaseous TiCl 4 Loaded into the pre-reaction fluidized bed 3; the inert gas entering the bottom of the pre-reaction fluidized bed 3 keeps the titanium-containing powder in a fluidized state, and obtains a pre-reaction product powder through pre-reaction; the pre-reaction product The powder enters the evaporation reaction fluidized bed 6 through the discharge port of the pre-reaction fluidized bed 3 , the discharge port of the first cyclone separation device 4 and the discharge port of the first high-temperature dust removal device 5 The pre-reaction product po...

Embodiment 3

[0065] In this embodiment, on the basis of the above-mentioned implementation example 2, the titanium-containing powder in the powder feeding device 1 is TiH 2 powder with a purity of 99% and a particle size of 5 μm; the nitrogen source gas is N 2 , H 2 with N 2 The molar ratio is 1 / 6; the TiCl 4 The temperature of the evaporation device 2 is 30°C; the pre-reaction temperature in the pre-reaction fluidized bed 3 is 500°C, wherein TiCl 4 with TiH 2 The molar ratio of the powder is 0.5, the average residence time of the powder is 5min; the gasification temperature of the evaporation reaction fluidized bed 6 is 600°C; the powder synthesis temperature of the deposition reaction fluidized bed 8 is 730°C, and the powder The average residence time is 5min, and the N content in the nitrogen source gas in the deposition reaction fluidized bed 8 is the same as that of the TiCl in the pre-reaction fluidized bed 3 4 The molar ratio is 0.25, figure 2 In order to prepare the SEM scan...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a system and a method for preparing TiN, TiC and TiCN powder in a fluidized bed. A cheap TiCl4 gas is pre-reacted in the fluidized bed to obtain a pre-reaction product, and then the pre-reaction product is nitrided or (and) carbonized into the TiN, TiC and TiCN powder in a nitrogen source and carbon source atmosphere in a deposition reaction fluidized bed. According to theinvention, the temperature for preparing the TiN, TiC and TiCN powder by traditional chemical vapor deposition is obviously reduced, the particle size and morphology of the prepared TiN, TiC and TiCNpowder are controllable, the preparation process and equipment are simple, the raw materials are economic, the preparation method is suitable for large-scale industrial production, and the preparationmethod has good economic and social benefits.

Description

technical field [0001] The invention belongs to the fields of chemical industry and materials, and relates to a preparation method of powder, in particular to a preparation process of TiN, TiC and TiCN powder. Background technique [0002] TiN, TiC, and TiCN are widely used in mechanical processing, aerospace, petrochemical, electronic information, bioelectrochemistry, etc. field has a wide range of applications. For example, TiN, TiC, and TiCN can be used as tool materials, mold materials, anti-corrosion materials, conductive ceramic materials, electrode materials, decorative materials, energy-saving materials, wear-resistant materials, and biocompatible materials. TiN, TiC, TiCN powder is the basis for preparing these high-performance TiN, TiC, TiCN materials. After decades of continuous research and development, there are currently the following major categories of preparation methods: [0003] (1) Direct nitriding or (and) carbonization method, that is, Ti or TiH 2 T...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/076
CPCC01B21/0763C01B32/90C01B32/921C01P2004/61
Inventor 向茂乔朱庆山宋淼
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI