Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Directly-heated rotary kiln for reduction nitridation reaction

A nitriding reaction and direct heating technology, which is applied in the field of high-temperature kilns, can solve the problems of high manufacturing cost and unsafety of power supply, and achieve the effects of improving electricity safety, reducing power consumption, and increasing power consumption

Pending Publication Date: 2021-06-01
冯良荣
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive current or excessive voltage is not safe, and the cost of power supply manufacturing is relatively high

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
  • Directly-heated rotary kiln for reduction nitridation reaction
  • Directly-heated rotary kiln for reduction nitridation reaction
  • Directly-heated rotary kiln for reduction nitridation reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] figure 1 with figure 2 It is the schematic diagram of embodiment 1. Such as figure 1 As shown, the direct-heating rotary kiln is used as a reactor for carbothermal reduction and / or nitriding reaction of raw materials such as metal oxides, and includes a kiln head box 1, a kiln head box tail gas outlet 16, a driving wheel 2, Bearing wheel 3, a group of two positive conductive materials 10, a group of two positive electrodes 14, a positive conductive slip ring 4, a rotary tube 5, a refractory material 6, a group of two negative conductive materials 11, a group of two negative electrodes 15, Negative conductive slip ring 7, 6 k-grading thermocouples 12, rotary sealing connection 8 between kiln tail box and rotary tube, kiln tail box 9 and air inlet 13 on kiln tail box. The refractory material 6 plays the role of fire resistance, heat preservation and insulation at the same time, and it is required that the resistance of the refractory material in contact with the mater...

Embodiment 2

[0058] image 3 , Figure 4 with Figure 5It is the schematic diagram of embodiment 2. image 3 The figure shows the heating section 173 of the kiln chamber 17, the cooling section 174 and the kiln chamber discharge port 175, the negative electrode 15, the negative electrode conductive material 11 passing through the refractory material 6 and the rotary tube 5, the rotation between the kiln tail box and the rotary tube The sealing connection 8, the kiln tail box 9, the screen hole pipe 25 connected to the discharge port 175 of the kiln chamber, and the material retaining plate 19 covered on the screen hole pipe. The baffle plate 19 does not rotate with the rotary tube 5, but is in sliding frictional contact with the discharge port 175 of the kiln chamber in Embodiment 1 or the discharge port of the sieve tube in this embodiment. Partition plate 20 and sieve plate 21 are arranged in kiln tail box 9.

[0059] Figure 4 The conductive connection between the annular negative ...

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
Login to View More

Abstract

The invention provides a directly-heated rotary kiln for reduction nitridation reaction. The directly-heated rotary kiln is used for producing vanadium-nitrogen alloy, nitrided ferrovanadium, reduced iron, nitrided ferrochromium and other products and comprises a rotary pipe, refractory materials, a driving wheel, a bearing wheel, an electric heating system, a kiln head box, a kiln tail box and other parts. A cylindrical or prismatic inner cavity enclosed by the refractory materials is a kiln chamber. The electric heating system comprises a positive electrode and a negative electrode, a heating power source applies direct-current voltage to the positive electrode and the negative electrode, the electrodes make contact with a heated material in the rotary kiln, current flows through the material through the positive electrode and then flows to the negative electrode, the materials serve as a resistor for heating, and heating of the materials is completed. Protrusions with the height of 1cm are arranged on the inner wall of the kiln chamber, the length-diameter ratio of the heating section is optimized, a material level maintaining device and the like are additionally arranged on a feeding channel or a discharging port of the kiln chamber, the filling rate of materials in the kiln chamber is increased, the requirement for the voltage level of a heating power source is lowered, the productivity of the directly-heated rotary kiln is increased, and energy consumption is reduced.

Description

technical field [0001] The invention relates to a direct-heating rotary kiln, which belongs to the technical field of high-temperature kilns. Background technique [0002] Rotary kiln is an important heating and calcination equipment in the chemical industry, materials, and even pharmaceutical industries, and it is widely used. The Chinese patent CN103335513B submitted by the inventor discloses a direct heating rotary kiln, which is a kind of heated material (that is, the material processed by the rotary kiln, hereinafter referred to as material) that feeds the power supply directly into the rotary kiln through electrodes. The current flows from the heating power supply through the positive electrode through the material, returns to the negative electrode and then returns to the heating power supply, and uses the resistance of the material to make the material itself directly heat the electric heating rotary kiln (hereinafter referred to as the direct heating rotary kiln). ...

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): F27B7/02F27B7/10F27B7/32F27B7/33F27B7/34F27B7/42
CPCF27B7/02F27B7/10F27B7/34F27B7/42F27B7/33F27B7/32F27B7/3205F27B2007/022
Inventor 冯良荣甘亚
Owner 冯良荣
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com