Method for preparing high-performance heat-generating agent

A technology for exothermic agents and raw materials, applied in the field of preparation of high-performance exothermic agents, can solve problems such as affecting the heating effect, and achieve the effects of increasing the calorific value, promoting combustion, and simplifying the process

Active Publication Date: 2010-12-08
沈阳东大高温材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because metal aluminum is easy to form a dense oxide protective film on the surface in the air, which affects the heating effect

Method used

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  • Method for preparing high-performance heat-generating agent
  • Method for preparing high-performance heat-generating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The heating agent is weighed by mass percentage from the following raw materials:

[0032] Aluminum powder 20%

[0033] Calcium Silicon Oxide 50%

[0034] Graphite 25%

[0035] Ferric oxide 5%

[0036] Rare earth oxides 0%

[0037] Mix the raw materials uniformly in the mixing equipment to obtain the exothermic agent whose properties are shown in Table 1.

Embodiment 2

[0039] The heating agent is weighed by mass percentage from the following raw materials:

[0040] Aluminum powder 30%

[0041] Calcium Silicon Oxide 40%

[0042] Graphite 25%

[0043] Ferric oxide 5%

[0044] Rare earth oxides 0%

[0045] Mix the raw materials uniformly in the mixing equipment to obtain the exothermic agent whose properties are shown in Table 1.

Embodiment 3

[0047] The heating agent is weighed by mass percentage from the following raw materials:

[0048] Aluminum powder 30%

[0049] Calcium Silicon Oxide 30%

[0050] Graphite 25%

[0051] Ferric oxide 7%

[0052] Rare earth oxides 8%

[0053] Mix the raw materials uniformly in the mixing equipment to obtain the exothermic agent whose properties are shown in Table 1.

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Abstract

The invention relates to a method for preparing a heat-generating agent. The technical scheme is that: the heat-generating agent is prepared from the following raw materials in percentage by mass: 10 to 60 percent of aluminum metal powder, 10 to 60 percent of silicon / calcium oxides, 5 to 30 percent of graphite, 2 to 20 percent of ferric oxide and 1 to 10 percent of rare earth oxides, wherein the purity of the aluminum metal powder is over 90 percent; the particle diameter of silicon / calcium oxide micro powder is less than 0.074mm; the mol ratio of calcium oxide to silicon oxide is 1 to 5; the silicon / calcium oxide micro powder contains 0.5 to 9 mass percent of impurities, such as magnesium oxide and the like; the purity of the expanded graphite is over 90 percent; the purity of the ferric oxide is over 60 percent; and the rare earth oxides contain more than 30 mass percent of cerium oxide. The heat-generating agent with high performance can be prepared by uniformly mixing the raw materials according to the proportion in mixing equipment. The heat-generating agent has the characteristics of low combustion starting temperature, high heat productivity, good heat-preservation effect. Moreover, the process is simple, and the method is applicable for large-scale production.

Description

technical field [0001] The invention relates to a preparation method of a material, in particular to a preparation method of a high-performance exothermic agent. Background technique [0002] In order to meet the casting requirements of high-quality steel grades, especially large-scale special steel, and further improve the quality of steel ingots and the yield of molten steel, it is very important to use high-performance heating agents. Among them, the main functions of the heating agent are: [0003] (1) Sufficient feeding: remelting the solidified steel at the riser part of the steel ingot mold and feeding the steel ingot body to increase the yield of molten steel; [0004] (2) Reduce inclusions: Slowly solidify the molten steel in the ingot mold and the remelted molten steel on the upper part, so that the non-metallic inclusions in the molten steel can fully float up to improve the quality of the billet. [0005] Therefore, it is required that the exothermic agent must...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D7/00
Inventor 于景坤
Owner 沈阳东大高温材料有限公司
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