a drainage sand

A technology of drainage sand and pearl sand, which is applied in the field of drainage sand, can solve the problems of low cost and high self-opening rate of drainage sand, achieve low cost, meet the requirements of long-term refining conditions, and have good fluidity

Active Publication Date: 2016-02-10
ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a drainage sand, which aims to solve the problems in the prior art that there is no drainage sand with high self-opening rate, low cost and environmental protection.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A drainage sand, including 1 part of carbon material, 3 parts of Al according to the mass ratio 2 o 3 —CaO series material, 5 parts of zircon sand of 20 mesh to 40 mesh, 96 parts of pearl sand; the mass percentage of pearl sand in each particle size range to the total amount of pearl sand is as follows: pearl sand with a particle size of 80 mesh to 120 mesh accounts for 31% , with a particle size of 60 mesh to 80 mesh pearl sand accounted for 16%, 20 mesh to 60 mesh pearl sand accounted for 39%, 6 mesh to 20 mesh pearl sand accounted for 14%; the Al 2 o 3 —Al in CaO series substances 2 o 3 The mass percentage is 60%.

Embodiment 2

[0019] The difference from Example 1 is that the mass percentage of pearl sand in each particle size range to the total pearl sand is as follows: pearl sand with a particle size of 80 mesh to 120 mesh accounts for 15%, and pearl sand with a particle size of 60 mesh to 80 mesh accounts for 15%. 14%, 20 mesh to 60 mesh pearl sand accounted for 49%, 6 mesh to 20 mesh pearl sand accounted for 22%.

Embodiment 3

[0021] The difference from the above embodiments is that the mass percentage of the pearl sand in each particle size range to the total pearl sand is as follows: the pearl sand with a particle size of 80 mesh to 120 mesh accounts for 45%, and the pearl sand with a particle size of 60 mesh to 80 mesh accounts for 45%. 20%, 20 mesh to 60 mesh pearl sand accounted for 29%, 6 mesh to 20 mesh pearl sand accounted for 6%.

[0022] In the present invention, the thermal expansion coefficient of the pearl sand is small, the adhesion between the pearl sand and the inner wall of the nozzle due to expansion is small, and the frictional resistance between the drainage sand and the inner wall of the nozzle is also small, that is, the fluidity is good, the spherical particles are regular and uniform, and the structure Compact, low cost and good environmental performance; the invention has a higher self-opening rate than siliceous drainage sand, is more environmentally friendly than chromium d...

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PUM

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Abstract

The invention relates to drainage sand and aims to solve the problem that no drainage sand which has the advantages of high self-open rate, low cost and environmental friendliness in use is not available. The drainage sand is prepared from the following components in parts by mass: 0.5-2 parts of a carbon material, 2-5 parts of Al2O3-CaO serial substances, 5-10 parts of zircon sand and 94-97.5 parts of ceramsite. The drainage sand provided by the invention is low in cost, good in environmental performance, good in sintering performance, high in refractoriness, good in mobility and good in air permeability and has high the self-open rate which is over 98%.

Description

technical field [0001] The invention relates to a drainage sand. Background technique [0002] Drainage sand is the filling material for the nozzle at the bottom of the ladle, which can be sintered at a lower temperature to avoid accidents caused by the drainage sand floating up when molten steel is added; under high temperature and long-term smelting, the liquid surface of the steel should not be sintered too thick in order to achieve Automatically start pouring, improve production efficiency, reduce molten steel pollution, reduce flue gas consumption, and improve production safety factor. [0003] Judging from the current use effects of drainage sand made of various materials: the cost of forsterite drainage sand and siliceous drainage sand is low, but the self-opening rate is low; zirconium drainage sand and chrome drainage sand have better self-opening rate, But the cost is higher, and it is easy to pollute the environment. Contents of the invention [0004] The inve...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C04B35/66
Inventor常正钦朱锦和王立旺李新明张会球
OwnerZHEJIANG KINGCRED NEW MATERIAL CO LTD