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

A kind of pelletizing rotary kiln anti-spalling refractory castable and preparation method thereof

A technology of refractory castables and rotary kilns, which is applied in the field of refractory materials for lining of high-temperature furnaces and kilns. It can solve the problems of affecting the service life of rotary kiln linings, the operating conditions of rotary kilns, the increase of production costs, and frequent maintenance, so as to reduce the number of maintenance. and pellet production cost, extended service life, and improved spalling resistance

Active Publication Date: 2016-09-14
HENAN HONGDA FURNACE IND
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the improvement of production technology and the substantial increase of production capacity, the staged kiln shutdown has put forward new requirements for the chain grate machine-rotary kiln pellet production line. The traditional high-alumina castables and corundum castables are under the dynamic action of high-temperature materials. Under the damage of rapid cooling and rapid heat, large-scale spalling often occurs, which affects the service life of the rotary kiln lining and the operating status of the rotary kiln. Frequent maintenance increases production costs. The peeling of the kiln lining has long plagued pellet manufacturers and manufacturers. Refractory material supplier

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
  • A kind of pelletizing rotary kiln anti-spalling refractory castable and preparation method thereof
  • A kind of pelletizing rotary kiln anti-spalling refractory castable and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: A pelletized rotary kiln anti-stripping refractory castable, the weight percentage of each raw material is as follows: first-grade bauxite aggregate: 40%, super-grade bauxite aggregate: 20%, mixed nodular powder: 8%, silicon Fine powder of lineite: 15%, fine powder of kyanite: 5%, a-Al 2 o 3 Fine powder: 5%, zirconium boride powder: 0.1%, binder: 6.85%, admixture: 0.05%.

[0017] A kind of preparation method of anti-stripping refractory castable for pelletizing rotary kiln as above, its preparation method is as follows: first mix spheroidal powder, sillimanite fine powder and kyanite fine powder for 3 minutes, prepare mixed fine powder ; Then mix the first-grade bauxite aggregate and super-grade bauxite aggregate with 5-3, 3-1, 1-0.5 third-grade ingredients for 3 minutes to prepare mixed aggregate; then add the prepared mixed fine powder In the prepared mixed aggregate, add the mixed fine powder while stirring, and stir for another 2 minutes after adding; ...

Embodiment 2

[0018] Example 2: A pelletized rotary kiln anti-stripping refractory castable, the weight percentage of each raw material is as follows: first-grade bauxite aggregate: 30%, super-grade bauxite aggregate: 25%, corundum powder: 4%, mixed nodular graphite Powder: 9.8%, sillimanite fine powder: 10%, andalusite fine powder: 5%, kyanite fine powder: 5%, a-Al 2 o 3 Fine powder: 3%, zirconium boride powder: 2%, binder: 2%, admixture: 0.2%.

[0019] A kind of preparation method of anti-stripping refractory castable for pelletizing rotary kiln as above, its preparation method is as follows: firstly corundum powder, mixed nodular powder, sillimanite fine powder, andalusite fine powder and kyanite fine powder are mixed 5 minutes to prepare mixed fine powder; then mix the first-grade bauxite aggregate and super-grade bauxite aggregate with 10-5, 5-3, 3-0.5 third-grade ingredients for 2 minutes to prepare mixed aggregate; then Add the prepared mixed fine powder into the prepared mixed ag...

Embodiment 3

[0020] Example 3: A pelletized rotary kiln anti-stripping refractory castable, the weight percentage of each raw material is as follows: first-grade bauxite aggregate: 35%, super-grade bauxite aggregate: 22%, corundum powder: 7.4%, mixed nodular graphite Powder: 15%, sillimanite fine powder: 5%, andalusite fine powder: 3%, a-Al 2 o 3 Fine powder: 4%, zirconium boride powder: 1.5%, binder: 7%, admixture: 0.1%.

[0021] A kind of preparation method of anti-stripping refractory castable for pelletizing rotary kiln as described above, its preparation method is as follows: firstly corundum powder, mixed nodular powder, sillimanite fine powder and andalusite fine powder are mixed for 4 minutes to prepare a mixed fine powder; then the first-grade bauxite aggregate and super-grade bauxite aggregate are mixed with 10-5, 5-3, 3-0.5 third-grade ingredients for 1 minute to prepare mixed aggregate; then the prepared mixed fine powder Add the powder into the prepared mixed aggregate, add...

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 relates to an anti-stripping refractory castable for a pellet rotary kiln and a preparation method thereof. The anti-stripping refractory castable comprises the following raw materials by weight percent: 30-40% of primary alumina aggregates, 20-25% of special grade alumina aggregates, 0-8% of corundum powder, 5-15% of mixed spherulitic graphite powder, 5-15% of sillimanite fine powder, 0-5% of andalusite fine powder, 0-5% of kyanite fine powder, 3-5% of a-Al2O3 fine powder, 0.1-2% of zirconium boride powder, 2-7% of binding agent and 0.05-0.2% of additives. The anti-stripping refractory castable has excellent high temperature strength, simultaneously has certain toughness, solves the technical problem of rotary kiln lining stripping which troubles improvement of the oxidized pellet process for a long time, prolongs the service life of a kiln lining, and reduces the kiln lining maintenance frequency and the pellet production cost.

Description

technical field [0001] The invention belongs to the technical field of refractory materials for inner lining of high-temperature furnaces and kilns, and in particular relates to an anti-stripping refractory castable for a pellet rotary kiln and a preparation method thereof. Background technique [0002] In recent years, with the development of my country's iron and steel industry, the production capacity of pellets has increased rapidly, especially the increase of the chain grate machine-rotary kiln system is the most obvious. The service life of the refractory lining used in the main equipment in the chain grate machine-rotary kiln system is directly related to the operation status of the production line, the quality of pellets and the operating rate of the equipment, so it has received great attention from the pelletizing plant. [0003] The rotary kiln is an oxidation pellet chain grate machine, which is the core equipment of the rotary kiln system. Its function is to roa...

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 Patents(China)
IPC IPC(8): C04B35/66
Inventor 何贯通李学彦廖良郭宏照王东明孙永瑞碗扬威史才禄杨鹏飞
Owner HENAN HONGDA FURNACE IND
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