Exothermic insulating riser sleeve and preparation method thereof

A thermal insulation riser sleeve and mixed technology, which is applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve the problems of poor thermal insulation, insufficient heat generation, single function, etc., achieve long thermal insulation time, and increase the feeding rate of molten iron , The effect of simple preparation method

Inactive Publication Date: 2014-02-05
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of poor heat preservation, insufficient heat generation and single function of existing heating and heat preservation riser sleeves, and to provide a heating and heat preservation riser sleeve and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0015] Specific embodiment one: the heat preservation riser sleeve of this embodiment is composed of 34 to 38 parts of quartz sand, 16 to 20 parts of vermiculite, 2 to 4 parts of potassium nitrate, and 2 to 3 parts of chloride by mass fraction. Calcium, 3.5-4.0 parts of ferric oxide powder, 12-14 parts of graphite powder, 16-18 parts of aluminum powder, 0.5-1.0 parts of magnesium powder and 6 parts of modified water glass.

[0016] In this embodiment, modified water glass is used as a binder.

specific Embodiment approach 2

[0017] Specific embodiment two: what this embodiment is different from specific embodiment one is that heat preservation riser cover is made of 35 parts of quartz sand, 17 parts of vermiculite, 2.5 parts of potassium nitrate, 2.5 parts of chloride by mass fraction Calcium, 3.6 parts of ferric oxide powder, 12.5 parts of graphite powder, 16.5 parts of aluminum powder, 0.6 parts of magnesium powder and 6 parts of modified water glass. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0018] Specific embodiment three: what this embodiment is different from specific embodiment one or two is that heat preservation riser cover is by mass fraction by the quartz sand of 36 parts, the vermiculite of 18 parts, the potassium nitrate of 3 parts, the potassium nitrate of 2.8 parts Calcium chloride, 3.8 parts of ferric oxide powder, 13 parts of graphite powder, 17 parts of aluminum powder, 0.8 parts of magnesium powder and 6 parts of modified water glass. Others are the same as in the first or second embodiment.

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PUM

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Abstract

The invention discloses an exothermic insulating riser sleeve and a preparation method thereof and aims to solve the problems of bad heat insulation, insufficient heating and single effect in a conventional exothermic insulating riser sleeve. According to the formula, the exothermic insulating riser sleeve is prepared from quartz sand, vermiculite, potassium nitrate, calcium chloride, iron sesquioxide powder, graphite powder, aluminum powder, magnesium powder and modified sodium silicate. The method comprises the following steps: (1) weighing raw materials; (2) preparing a mixed wet material; and (3) filling the mixed wet material into a mold, pre-tightening while filling the wet material, performing compression molding, and demolding, thus finishing the operations. According to the formula of the exothermic insulating riser sleeve, the content of an exothermic agent is increased, the exothermic agent has the advantages of rapid heating, and a heating effect is improved. Moreover, the vermiculite serves as a thermal insulation material, is long in thermal insulation time and has a good thermal insulation effect, so that the molten iron feeding ratio in a riser is improved under the combined action of rapid heating and long thermal insulation.

Description

technical field [0001] The invention relates to a heating and heat preservation riser sleeve and a preparation method thereof. Background technique [0002] The heating and heat preservation riser is composed of various materials such as heating agent, heat insulating agent and binder. During the pouring process, due to the chemical reaction of the riser material, the temperature of the molten metal in it is increased, thereby prolonging the temperature of the molten metal in the riser. During the solidification time, it flows back to the mold to realize feeding. However, with the development of casting technology and the increasing requirements for casting quality, it is difficult to meet the feeding requirements of castings due to the disadvantages of poor heat preservation, insufficient heat generation and single function of sand riser sleeves in traditional formula technology. Therefore, research and More and more attention has been paid to the development of new heat-i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/08B22C1/02
Inventor 石德全王常玖高桂丽
Owner HARBIN UNIV OF SCI & TECH
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