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Method for preparing active iron oxide powder materials by means of vacuum aluminothermic reduction

A technology of oxide powder and active iron, which is applied in the field of material manufacturing, can solve the problems of complex preparation process, high cost, and no active iron oxide has been seen, and achieve the effects of simple process, low cost, good catalytic activity and magnetic properties

Active Publication Date: 2015-10-07
DONGGUAN PUREMATE ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process adopted in these patents is complex and costly
However, there has been no report on the preparation of active iron oxides by vacuum aluminothermic reduction of ferric oxide.

Method used

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  • Method for preparing active iron oxide powder materials by means of vacuum aluminothermic reduction
  • Method for preparing active iron oxide powder materials by means of vacuum aluminothermic reduction
  • Method for preparing active iron oxide powder materials by means of vacuum aluminothermic reduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1, using ferric oxide micron powder as raw material, weighing 1g ferric oxide; using aluminum micron powder as reducing agent, weighing 1g aluminum powder; mixing the raw material and reducing agent evenly, and setting aside;

[0036] Step 2. Place the mixture in step 1 in the center of a clean porcelain boat;

[0037] Step 3. Put the porcelain boat prepared in step 2 into the middle of the high-temperature tube furnace, seal the tube furnace, and use a vacuum pump to pump the air pressure inside the tube furnace into a negative pressure state, and maintain the vacuum degree at less than 5pa;

[0038] Step 4. Heat the tube furnace to 900° C. at a heating rate of 20 / min, maintain it for 6-12 hours, stop heating, and take out the reacted active iron oxide powder after the tube furnace cools down to room temperature.

[0039] Step 5. Put the product obtained in step 4 into an agate mortar and grind for 5 minutes to obtain active FeO / Fe 3 o 4 Material. Sample FeO / Fe...

Embodiment 2

[0041] Step 1, using ferric oxide micron powder as raw material, weighing 1g ferric oxide; using aluminum micron powder as reducing agent, weighing 2g aluminum powder; mixing the raw material and reducing agent evenly, and setting aside;

[0042] Step 2. Place the mixture in step 1 in the center of a clean porcelain boat;

[0043] Step 3. Put the porcelain boat prepared in step 2 into the middle of the high-temperature tube furnace, seal the tube furnace, and use a vacuum pump to pump the air pressure inside the tube furnace into a negative pressure state, and maintain the vacuum degree at less than 5pa;

[0044] Step 4: Heat the tube furnace to 950 °C at a heating rate of 25 °C / min, maintain it for 9 hours, stop heating, and take out the reacted active iron oxide powder after the tube furnace cools down to room temperature.

[0045] Step 5. Put the product obtained in step 4 into an agate mortar and grind for 10 minutes to obtain the FeO material.

[0046] The sample FeO is ...

Embodiment 3

[0048] Step 1, using ferric oxide micron powder as a raw material, weighing 1g of ferric oxide; using aluminum micron powder as a reducing agent, weighing 5g aluminum powder; mixing the raw material and reducing agent evenly, and setting aside;

[0049] Step 2. Place the mixture in step 1 in the center of a clean porcelain boat;

[0050] Step 3. Put the porcelain boat prepared in step 2 into the middle of the high-temperature tube furnace, seal the tube furnace, and use a vacuum pump to pump the air pressure inside the tube furnace into a negative pressure state, and maintain the vacuum degree at less than 5pa;

[0051] Step 4: Heat the tube furnace to 1000 °C at a heating rate of 30 °C / min, maintain it for 12 hours, stop heating, and take out the reacted active iron oxide powder after the tube furnace cools down to room temperature.

[0052] Step 5. Put the product obtained in step 4 into an agate mortar and grind for 15 minutes to obtain Fe / FeO material.

[0053] The sample...

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Abstract

The invention relates to a method for preparing active iron oxide powder materials by means of vacuum aluminothermic reduction. Iron sesquioxide micro-powder is used as a raw material, aluminum micro-powder is used as a reducing agent, and the iron oxide powder materials can be manufactured by the aid of a vacuum aluminothermic reduction process. The method includes preparing steps of 1, uniformly mixing the iron sesquioxide micro-powder, namely, the raw material, and the aluminum micro-powder, namely, the reducing agent, with each other to obtain mixtures for standby application; 2, placing the mixtures obtained in the step 1 in the center of a clean porcelain boat; 3, placing the porcelain boat prepared in the step 2 in the middle of a high-temperature tube furnace, sealing the tube furnace, pumping the high-temperature tube furnace by the aid of a vacuum pump to enable the high-temperature tube furnace to be in an internal negative-pressure state and keeping the vacuum degree of the high-temperature tube furnace lower than or equal to 5pa; 4, heating the high-temperature tube furnace until the temperature of the high-temperature tube furnace reaches 900-1000 DEG C, keeping the raw material and the reducing agent reacting to each other for certain reaction time, then stopping heating the high-temperature tube furnace, cooling the high-temperature tube furnace until the temperature of the high-temperature tube furnace reaches the room temperature and taking products out of the high-temperature tube furnace. The method has the advantages that technologies are simple and controllable, prepared active iron oxide (FeO / Fe<3>O<4>, FeO, Fe / FeO) powder is high in purity and low in cost, and requirements of actual production can be met.

Description

technical field [0001] The invention belongs to the field of material manufacturing. In particular, it relates to a method for preparing active iron oxide powder material through vacuum aluminothermic reduction. Background technique [0002] Iron oxide is a very important material widely used in catalysis, magnetic fluid and magnetic recording due to its unique physical and chemical properties. For example, nanoscale iron oxides have size- and shape-related electrical and magnetic properties, as well as compatibility with biological tissues, making them useful in magnetic inks, electronic and biosensitive materials, high-density magnetic recording media, and biomedicine. It has a wide range of applications in fields such as; nanostructured ferric oxide can catalyze the decomposition of hydrogen peroxide and degrade organic pollutants in the heterogeneous Fenton reaction. [0003] Domestic reports on the preparation of nanoscale or micron-scale iron oxide materials are gene...

Claims

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Application Information

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IPC IPC(8): C01G49/04C01G19/08
Inventor 艾智慧穆毅
Owner DONGGUAN PUREMATE ENVIRONMENTAL PROTECTION TECH CO LTD
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