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Heating agent for die casting

A heating agent and mold casting technology, which is applied in the direction of casting molds, casting mold components, casting molding equipment, etc., can solve the problems of shrinkage of the ingot head, prolong the solidification time, and molten steel pollution, so as to reduce the shrinkage of the head and prolong the solidification Time, the effect of improving the yield

Inactive Publication Date: 2016-11-23
ZHENGZHOU DONGSHENG METALLURGY NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the production of large-scale steel ingot casting, the riser is a supplementary part added above the casting to avoid defects in the casting. In order to prolong the solidification time of the molten steel in the riser and ensure that the molten steel can be successfully cast into a qualified steel ingot, the molten steel at the riser must have suitable However, the general steel mold casting solid mold slag only has a single function of improving the surface quality of the steel ingot, and the heat preservation effect on the head of the steel ingot is not good. The molten steel at the riser will cool down too quickly during the casting process. The molten steel at the riser is added with a molten steel covering agent to insulate the molten steel, thereby prolonging the solidification time of the molten steel in the riser, reflowing and recasting, and realizing feeding
At present, the heat-insulating products used in the ingot head of the existing die-casting riser basically do not generate heat, the ingot head shrinks seriously, and the yield of the slab is low. Some existing ones have heating covering agents, and the heat preservation effect is often unsatisfactory. , and will produce varying degrees of pollution to molten steel

Method used

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  • Heating agent for die casting
  • Heating agent for die casting
  • Heating agent for die casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A molded heating agent, wherein the parts by weight of each component are: igniting agent 11-22, heating agent 40-75, heat preservation agent 40-70.

[0017] The ignition agent is composed of inorganic salt and alkali metal, wherein the weight part of inorganic salt is 8-12, and the weight part of alkali metal is 3-10.

[0018] Described inorganic salt is sodium nitrate.

[0019] The alkali metal is magnesium.

[0020] The exothermic agent is composed of the following ingredients in parts by weight: 15-25 parts of carbon-containing material, 5-10 parts of aluminum, 10-20 parts of elemental silicon, and 10-20 parts of silicon-calcium alloy.

[0021] The carbonaceous substance is coke or graphite carbon or plant carbon.

[0022] The heat insulating agent is composed of the following ingredients in parts by weight: 20-30 parts of wollastonite powder, 15-25 parts of vermiculite, and 5-15 parts of acidified graphite.

Embodiment 2

[0024] A molded heating agent, wherein the parts by weight of each component are: igniting agent 14-19, heating agent 48-66, heat preservation agent 48-61.

[0025] The ignition agent is composed of inorganic salt and alkali metal, wherein the weight part of inorganic salt is 9-11, and the weight part of alkali metal is 5-8.

[0026] Described inorganic salt is sodium nitrate.

[0027] The alkali metal is magnesium.

[0028] The exothermic agent is composed of the following components by weight: 17-22 carbon-containing substances, 6-9 aluminum, 13-17 elemental silicon, and 12-18 silicon-calcium alloys.

[0029] The carbonaceous substance is coke or graphite carbon or plant carbon.

[0030] The heat insulating agent is composed of the following components by weight: wollastonite powder 22-27, vermiculite 18-22, acidified graphite 8-12.

Embodiment 3

[0032] A molded heating agent, wherein the parts by weight of each component are: igniting agent 17, heating agent 57, heat preservation agent 55.

[0033] The ignition agent is composed of inorganic salt and alkali metal, wherein the weight part of inorganic salt is 10 parts by weight, and the weight part of alkali metal is 7 parts.

[0034] Described inorganic salt is sodium nitrate.

[0035] The alkali metal is magnesium.

[0036] The exothermic agent is composed of the following ingredients in parts by weight: 20 parts of carbonaceous material, 7 parts of aluminum, 15 parts of elemental silicon, and 15 parts of silicon-calcium alloy.

[0037] The carbonaceous substance is coke or graphite carbon or plant carbon.

[0038] The heat insulating agent is composed of the following ingredients in parts by weight: 25 parts of wollastonite powder, 20 parts of vermiculite, and 10 parts of acidified graphite.

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Abstract

A die-casting exothermic agent relates to casting auxiliary materials, and the weight parts of each component are: ignition agent 11-22, exothermic agent 40-75, heat preservation agent 40-70. The exothermic agent of the invention is composed of three parts: ignition agent, exothermic agent and heat insulating agent, which can heat and keep warm the molten steel at the riser without causing pollution to the molten steel, thus greatly prolonging the solidification of the molten steel at the riser Time, reducing the head shrinkage of the ingot and improving the yield of the slab.

Description

technical field [0001] The invention relates to auxiliary materials for casting, in particular to a heating agent for mold casting. Background technique [0002] The production of high-quality large steel ingots is an important problem facing the development of my country's equipment manufacturing industry. At present, ultra-large scale is an important trend in the technological development of equipment manufacturing industry worldwide. This trend puts forward new and higher requirements for the production of large steel ingots. [0003] In the production of large-scale steel ingot casting, the riser is a supplementary part added above the casting to avoid defects in the casting. In order to prolong the solidification time of the molten steel in the riser and ensure that the molten steel can be successfully cast into a qualified steel ingot, the molten steel at the riser must have suitable However, the general steel mold casting solid mold slag only has a single function o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/08B22D7/10
CPCB22C9/088B22D7/104
Inventor 慕永军慕润青闫橦楷
Owner ZHENGZHOU DONGSHENG METALLURGY NEW MATERIAL
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