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

Unfired magnesia-calcium brick and preparation method thereof

The technology of magnesia-calcium brick and magnesia-calcium sand is applied in the field of refractory materials, which can solve the problems of pollution, low service life of fired magnesia-calcium brick, influence on the quality of molten steel, etc. effect of time extension

Active Publication Date: 2010-12-22
浙江金磊耐火材料有限公司
View PDF4 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the ladle refractory materials used for smelting stainless steel and special steel in China are magnesia-carbon bricks, and a small amount of them are fired magnesia-calcium bricks. However, magnesia-carbon bricks have a polluting effect on molten steel and will affect the quality of molten steel. And fired magnesia-calcium bricks have a lower service life

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] Example: Production of 100 tons of unfired magnesia-calcium bricks

[0021] 1. First determine the production formula according to the ratio of various raw materials, the formula is: magnesia calcium sand 7-5mm 10%, 5-3mm 15%, 3-1mm 15%, 1-0.5mm 10%; magnesia 1-0.5mm 12%, ≤0.5mm 23%; graphite 10%; magnesium powder 1.5%; zircon sand 0.5%; anhydrous resin binder 3%.

[0022] According to the calculation, the amount of each raw material is: magnesia calcium sand 7-5mm 10 tons, 5-3mm 15 tons, 3-1mm 15 tons, 1-0.5mm 10 tons; magnesia 1-0.5mm 12 tons, ≤0.5mm 23 tons ; 10 tons of graphite; 1.5 tons of magnesium powder; 0.5 tons of zircon sand; 3 tons of anhydrous resin binder.

[0023] 2. Batching and mixing. According to the above production formula, batching is carried out. The total weight of each batching is 1000kg. The specific batching is: magnesia calcium sand 7-5mm 100kg, 5-3mm 150kg, 3-1mm 150kg, 1-0.5mm100kg; magnesia 1-0.5mm mm 120kg, ≤0.5mm 230kg; graphite 100kg...

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 an unfired magnesia-calcium brick which is prepared from the following raw materials in percentage by weight: 9-16 percent of 5-7mm magnesia-calcium sand, 9-16 percent of 3-5mm magnesia-calcium sand, 9-16 percent of 1-3mm magnesia-calcium sand, 9-16 percent of 0.5-1mm magnesia-calcium sand, 4-16 percent of 0.5-1 mm magnesia sand, 5-25 percent of not larger than 0.5mm magnesia sand, 1-10 percent of graphite, 2-5 percent of anhydrous resin bonding agent and 1-3 percent of additive formed by mixing magnesia powder and zircon sand. The processing method comprises the following steps of: crushing, grinding, compounding, pressing and forming, heating, baking and carrying out waterproof treatment. In the invention, the unfired magnesia-calcium brick with great volume density and high compression strength can be prepared due to reasonable compounding and a scientific treatment process, and particularly, the additive formed by mixing the magnesia powder and the zircon sand is used, therefore, the product has good medium-temperature strength, waterproofness and crack resistance.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to an unfired magnesia-calcium brick and a preparation method thereof. Background technique [0002] At present, most of the ladle refractory materials used for smelting stainless steel and special steel in China are magnesia-carbon bricks, and a small amount of them are fired magnesia-calcium bricks. However, magnesia-carbon bricks have a polluting effect on molten steel and will affect the quality of molten steel. The service life of fired magnesia-calcium bricks is relatively low. Contents of the invention [0003] The present invention aims at the technical problems existing in the above-mentioned prior art, and provides an unfired magnesia-calcium brick with a long service life, which can also purify molten steel and improve the quality of steelmaking, and a preparation method thereof. [0004] Technical scheme of the present invention is realized like this: [0005] An ...

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): C04B35/66
Inventor 姚建良金锋徐袁琳姚锦海金红兵王丹鲍继荣
Owner 浙江金磊耐火材料有限公司
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