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

Steel ladle covering agent

A technology of ladle covering agent and starch, which is applied in the field of foundry industry, can solve the problems of short heating time, reduce temperature drop, and high carbon content, and achieve the effect of prolonging heat preservation time and reducing heat consumption.

Active Publication Date: 2015-01-28
WUJIANG HYDRAULIC COMPONENTS FOUNDRY
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The covering agent can reduce the temperature drop, and can deoxidize and desulfurize, but the heating time is short, and the carbon content is slightly higher

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 1

[0018] In this embodiment, a ladle covering agent is made of the following raw materials in parts by weight: 18 parts of expanded graphite, 22 parts of organic bentonite, 18 parts of modified starch, 16 parts of silicon dioxide, 2 parts of strontium oxide, 2 parts of magnesium, 4 parts of alumina, 3 parts of vitrified microbeads, 14 parts of rock wool and 12 parts of fluorite, all of which are passed through a 300-mesh sieve.

[0019] Said ladle covering agent, said modified starch is obtained by the following steps: dissolving starch in hot water at 50°C, adding amylase, adjusting the pH to 6, enzymolysis for 60min, adding sodium periodate , fully stirred and mixed to obtain a suspension, added acrylic acid, reacted for 120min, filtered, concentrated and spray-dried the obtained supernatant to obtain a modified starch, wherein the weights of the added amylase, sodium periodate and acrylic acid were respectively starch 0.3%, 30% and 150% by weight.

[0020] Wherein, the parti...

Embodiment 2

[0023] In this embodiment, a ladle covering agent is made of the following raw materials in parts by weight: 12 parts of expanded graphite, 28 parts of organic bentonite, 12 parts of modified starch, 12 parts of silicon dioxide, 4 parts of strontium oxide, 4 parts of magnesium, 8 parts of alumina, 8 parts of vitrified microbeads, 11 parts of rock wool and 17 parts of fluorite, all of which are passed through a 300-mesh sieve.

[0024] The ladle covering agent, the modified starch is obtained by the following steps: dissolving the starch in hot water at 40-50°C, adding amylase, adjusting the pH to 7, enzymatically hydrolyzing it for 70 minutes, adding high iodine Sodium phosphate, fully stirred and mixed to obtain a suspension, added acrylic acid, reacted for 100min, filtered, concentrated and spray-dried the obtained supernatant to obtain modified starch, wherein the weights of amylase, sodium periodate and acrylic acid added were respectively 0.1%, 20% and 100% of the weight ...

Embodiment 3

[0028] In this embodiment, a ladle covering agent is made of the following raw materials in parts by weight: 16 parts of expanded graphite, 25 parts of organic bentonite, 16 parts of modified starch, 14 parts of silicon dioxide, 3 parts of strontium oxide, 3 parts of magnesium, 6 parts of alumina, 6 parts of vitrified microbeads, 13 parts of rock wool and 17 parts of fluorite, all of which are passed through a 300-mesh sieve.

[0029] The ladle covering agent described above, the modified starch is obtained by the following steps: dissolving the starch in hot water at 40-50°C, adding amylase, adjusting the pH to 7, enzymatically hydrolyzing it for 60 minutes, adding high iodine sodium phosphate, fully stirred and mixed to obtain a suspension, added acrylic acid, reacted for 120min, filtered, concentrated and spray-dried the obtained supernatant to obtain modified starch, wherein the weights of amylase, sodium periodate and acrylic acid added were respectively It is 0.1%, 22% a...

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
Granularityaaaaaaaaaa
Granularityaaaaaaaaaa
Granularityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a steel ladle covering agent, which is prepared from the following raw materials in parts by weight: 12 to 18 parts of expanded graphite, 22 to 28 parts of organic bentonite, 12 to 18 parts of modified starch, 12 to 16 parts of silicon dioxide, 2 to 4 parts of strontium oxide, 2 to 4 parts of magnesium oxide, 4 to 8 parts of alumina, 3 to 8 parts of vitrified micro bubbles, 11 to 14 parts of rock wool and 12 to 17 parts of fluorite. The steel ladle covering agent is low in carbon content; by the expanded graphite, the organic bentonite and the modified starch, impurities in molten steel can be effectively adsorbed, and a heat-preservation function is realized; by heating of the strontium oxide, magnesium oxide and alumina, heat consumption can be compensated, and heat-preservation time can be prolonged; by the silicon dioxide, vitrified micro bubbles, rock wool and fluorite, a heat-preservation layer can be formed to reduce the heat consumption.

Description

technical field [0001] The invention relates to a ladle covering agent, which belongs to the technical field of foundry industry. Background technique [0002] Steel ladles are mainly used to store and transport molten steel and maintain the temperature of molten steel. Due to the development of continuous casting technology, the residence time of molten steel in the ladle will be extended. In order to meet the technological requirements of subsequent processes, how to maintain the temperature of molten steel in the ladle and increase The quality of molten steel has become a major issue. Therefore, in order to prevent the secondary oxidation of molten steel in the ladle, reduce the temperature drop of molten steel, provide molten steel with a suitable temperature for continuous casting, and ensure its smooth pouring, the role of thermal insulation covering agent is very important. [0003] The ladle covering agent is added on the surface of the molten steel in the ladle, 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
IPC IPC(8): B22D11/111
CPCB22D11/111
Inventor 浦巧生
Owner WUJIANG HYDRAULIC COMPONENTS FOUNDRY