KR20150016697A - Refractory for manufacturing nickel powder, manufacturing method of the same and manufacturing method of nickel powder - Google Patents

Refractory for manufacturing nickel powder, manufacturing method of the same and manufacturing method of nickel powder Download PDF

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KR20150016697A
KR20150016697A KR1020130092446A KR20130092446A KR20150016697A KR 20150016697 A KR20150016697 A KR 20150016697A KR 1020130092446 A KR1020130092446 A KR 1020130092446A KR 20130092446 A KR20130092446 A KR 20130092446A KR 20150016697 A KR20150016697 A KR 20150016697A
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nickel
slurry
reaction
refractory
producing
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KR1020130092446A
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KR102052754B1 (en
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김정렬
김건우
김효섭
조항규
김두영
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삼성전기주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/11—Making porous workpieces or articles
    • B22F3/1103—Making porous workpieces or articles with particular physical characteristics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/12—Making metallic powder or suspensions thereof using physical processes starting from gaseous material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/30—Making metallic powder or suspensions thereof using chemical processes with decomposition of metal compounds, e.g. by pyrolysis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2301/00—Metallic composition of the powder or its coating
    • B22F2301/15—Nickel or cobalt

Abstract

The present invention relates to a refractory for preparing nickel powder which can prepare high purity nickel powder, to a preparing method thereof, and to a manufacturing method of nickel powder. According to an embodiment of the present invention, provided is a preparing method of a refractory for preparing nickel powder, which comprises the steps of: preparing first slurry by mixing nickel and water-based liquid; preparing second slurry by adding ammonium bicarbonate (NH_4HCO_3) to the first slurry; preparing third slurry by adding acetic acid (CH_3COOH) to the second slurry; and preparing a porous refractory formed with pores through a chain exothermic reaction of the third slurry.

Description

Technical Field The present invention relates to a refractory for producing a nickel powder, a method for producing the refractory, and a method for manufacturing a nickel powder,

The present invention relates to a refractory for producing nickel powder, a method for producing the refractory, and a method for producing nickel powder.

Generally, nickel powder is produced by a wet metallurgy method, a spray pyrolysis method, and a vapor condensation method.

Wet metallurgy and spray pyrolysis are very toxic and difficult to handle, including the production and handling of raw materials such as chloride or nitrate, environmental release management requirements for gas and liquid wastes, and the difficulty of producing particles with an average particle size of less than 100 nm .

Since the thermal condensation method based on thermal plasma is generally inactive (for example, a pure metal, an alloy, an oxide, a carbonate, etc.) as a feedstock, the above problems caused in a wet metallurgy method and a spray pyrolysis method do not occur A fine powder can be produced.

A method of producing a vapor condensation method using thermal plasma is a method in which a nickel metal or a metal salt is heated and evaporated at a very high temperature by using an arc plasma or a thermal plasma such as a high frequency discharge in an inert gas.

Then, hydrogen is reduced in a gaseous state to produce a gas containing a nickel element, and then the evaporated nickel element is cooled and solidified, whereby a fine nickel powder can be produced.

In this process, the thermal plasma is applied to the nickel raw material contained in the ceramic refractory structure to melt the raw material. The ceramic refractory used is made of a material having a melting point higher than the melting point of nickel (1455 ° C.).

As refractory materials for general refractory materials, refractory metals such as graphite, carbide, oxide, nitride, boride or tungsten, tantalum, molybdenum, niobium and the like may be used.

In the vapor condensation method using thermal plasma, the ceramic refractory plays an important role to contain the molten nickel, and therefore, the characteristics required from the ceramic refractory structure include corrosion resistance, resistance to escaping, thermal shock resistance and thermal conductivity.

When the nickel powder is continuously and mass-produced in a ceramic refractory structure made of graphite through vapor condensation using the thermal plasma, there is a problem that the carbon content increases due to the reaction of nickel and graphite at a high temperature have.

In order to solve the problems described above, a method of using a structure in which ceramic is coated on the inner side of a crucible made of a high melting point graphite material is introduced as disclosed in the following prior art documents.

However, in this case, due to the difference in thermal expansion coefficient between the graphite material on the lower side and the ceramic material coated on the upper side, when the material is heated to a temperature higher than 2000 ° C, the volume of the two materials changes greatly, causing a crack.

Therefore, a method for producing a high-purity nickel powder having a small amount of impurities while preventing the cracking of the crucible is still required.

Japanese Laid-Open Patent Publication No. 1999-343174

The present invention provides a refractory for producing nickel powder capable of producing a high-purity nickel powder, a method for producing the refractory, and a method for producing nickel powder.

One embodiment of the present invention comprises a process for producing a first slurry by mixing nickel and an aqueous liquid; Adding ammonium bicarbonate (NH 4 HCO 3 ) to the first slurry to prepare a second slurry; Adding acetic acid (CH 3 COOH) to the second slurry to prepare a third slurry; And producing a porous refractory having pores through a series exothermic reaction of the third slurry; The present invention provides a method for producing a refractory for producing a nickel powder.

The nickel may be in powder form.

The content of ammonium bicarbonate (NH 4 HCO 3 ) may be 0.25 to 5 parts by weight based on 100 parts by weight of the nickel.

The content of acetic acid (CH 3 COOH) may be 0.1 to 2 parts by weight based on 100 parts by weight of the nickel.

The content of the aqueous liquid may be 5 to 20 parts by weight based on 100 parts by weight of the nickel.

The chain exothermic reaction to the second reaction, and the ammonium bicarbonate to the balance of the oxygen in the first reaction, the nickel reaction to the reaction part and the acetic acid (CH 3 COOH) of the nickel contained in the third slurry (NH 4 HCO 3 ) is decomposed, and the second reaction and the third reaction can be initiated by the heat formed in the first reaction.

The method for producing the refractory for producing a nickel powder may further include the step of pouring the third slurry into a refractory-like mold after the step of producing the second slurry.

Another embodiment of the present invention can provide a refractory for producing nickel powder containing nickel oxide and formed with pores.

The nickel oxide may be nickel oxide (NiO).

The refractory for producing the nickel powder may have a porosity of 20% or more.

Another embodiment of the present invention is a method for producing a refractory material comprising the steps of: preparing a porous refractory material containing nickel oxide; Charging a nickel metal raw material into the porous refractory; Evaporating the nickel metal raw material to form a nickel vapor; And condensing the nickel vapor to form a powder; And a method for producing the nickel powder.

Wherein the step of preparing the porous refractory comprises: preparing a first slurry by mixing nickel and an aqueous liquid; preparing a second slurry by adding ammonium bicarbonate (NH 4 HCO 3 ) to the first slurry; Adding acetic acid (CH 3 COOH) to the slurry to prepare a third slurry, and producing a porous refractory material containing nickel oxide through a series exothermic reaction of the third slurry.

The chain exothermic reaction to the second reaction, and the ammonium bicarbonate to the balance of the oxygen in the first reaction, the nickel reaction to the reaction part and the acetic acid (CH 3 COOH) of the nickel contained in the third slurry (NH 4 HCO 3 ) is decomposed, and the second reaction and the third reaction can be initiated by the heat formed in the first reaction.

The step of forming the nickel vapor may include heating the nickel metal raw material in an inert gas atmosphere.

According to the present invention, it is possible to provide a refractory for producing nickel powder capable of producing a high-purity nickel powder, a method for producing the same, and a method for producing a nickel powder.

1 is a photograph of a refractory for producing a nickel powder according to an embodiment of the present invention.
2 is a process diagram of a method of manufacturing a refractory for producing nickel powder according to another embodiment of the present invention.
3 is a process diagram for a method of manufacturing a nickel powder according to another embodiment of the present invention.

The embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings may be exaggerated for clarity of description, and the elements denoted by the same reference numerals in the drawings are the same elements.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Refractory for making nickel powder and method for manufacturing the same

1 is a photograph of a refractory for producing a nickel powder according to an embodiment of the present invention.

2 is a process diagram of a method of manufacturing a refractory for producing nickel powder according to another embodiment of the present invention.

Referring to FIG. 1, a refractory 10 for producing a nickel powder according to an embodiment of the present invention includes nickel oxide and may have pores 1 formed thereon.

The refractory 10 for producing a nickel powder may include nickel oxide in an amount of 85 wt% or more, and the nickel oxide may be nickel oxide (NiO) though not particularly limited.

When the refractory for producing a nickel powder 10 contains at least 85 wt% of the nickel oxide, a high purity nickel powder can be produced when the nickel powder is produced using the refractory.

Further, the refractory for producing the nickel powder may be composed of a single composition consisting only of nickel oxide.

When the material constituting the refractory contains a component other than a single component formed only of nickel oxide, it is possible to reduce the melting point of the refractory, and it may be difficult to produce a high-purity nickel powder because the other components act as impurities.

The melting point of nickel oxide (NiO) is higher than that of pure nickel having a melting point of about 1455 ° C. When a refractory is formed with nickel oxide, the refractory does not dissolve in the nickel melt during the production of the nickel powder.

Further, even if a small amount of nickel oxide is melted in the melt, it is decomposed into nickel (Ni) and oxygen (O 2 ), so that it does not act as an impurity in the nickel powder.

Further, the porosity of the pores formed in the refractory for producing nickel powder may be 20% or more.

The porosity can be calculated by measuring the volume occupied by pores in the refractory for producing nickel powder.

When the porosity is 20% or more like the refractory for producing nickel powder of the present invention, it has a strong resistance to thermal shock and good heat insulation.

Referring to FIG. 2, the method for manufacturing a refractory for producing nickel powder according to the present invention includes the steps of: (S1) preparing a first slurry by mixing nickel and an aqueous liquid; Adding an ammonium bicarbonate (NH 4 HCO 3) in the first slurry to prepare a second slurry (S2); To prepare a third slurry by the addition of acetic acid (CH 3 COOH) in the second slurry (S3); And (S4) preparing a porous refractory having pores through a series exothermic reaction of the third slurry.

The nickel may be in powder form.

The chain exothermic reaction to the second reaction, and the ammonium bicarbonate to the balance of the oxygen in the first reaction, the nickel reaction to the reaction part and the acetic acid (CH 3 COOH) of the nickel contained in the third slurry (NH 4 HCO 3 ) is decomposed, and the second reaction and the third reaction can be initiated by the heat formed in the first reaction.

The first reaction may comprise the reaction of Scheme 1 below.

[Reaction Scheme 1]

Ni + 2CH 3 COOH → C4H 6 NiO 4 + H 2

The second reaction may comprise the reaction of Scheme 2 below.

[Reaction Scheme 2]

2Ni + O 2 → 2NiO

The third reaction may comprise the reaction of Scheme 3 below.

[Reaction Scheme 3]

NH 4 HCO 3 → NH 3 + H 2 O + CO 2

Hereinafter, a method for producing refractory for producing nickel powder will be described in detail with reference to Reaction Schemes 1, 2 and 3.

An aqueous liquid and powdered nickel are added to the reaction vessel and stirred to form a first slurry. The content of the aqueous liquid contained in the first slurry may be 5 to 20 parts by weight based on 100 parts by weight of nickel.

When the aqueous liquid is contained in an amount of less than 5 parts by weight based on 100 parts by weight of nickel, the viscosity of the slurry may be high and the uniformity of the slurry may deteriorate and the workability may be deteriorated. When the aqueous liquid is used in an amount of 20 parts by weight The viscosity of the slurry may be excessively lowered to lower the filling rate of the refractory after drying, and the drying time may be prolonged, which may increase the working time. When the aqueous liquid is contained in an amount exceeding 20 parts by weight, the viscosity of the slurry is too low to cause a problem that the volume of the flask becomes large.

The aqueous liquid may be water (pure water), but is not limited thereto.

Next, ammonium bicarbonate is added to the first slurry and stirred to form a second slurry. Since ammonium bicarbonate is highly soluble in aqueous liquids, precipitates are not formed and can dissolve well.

The amount of ammonium bicarbonate added to the first slurry may be 0.25 to 5 parts by weight based on 100 parts by weight of the nickel.

When ammonium bicarbonate is contained in an amount of less than 0.25 parts by weight based on 100 parts by weight of nickel, the porosity of the refractory for producing a nickel powder is lowered to fail to function as a refractory. When the amount exceeds 5 parts by weight, cracks are formed in the refractory, Ammonium may remain in the refractory for producing nickel powder and the content of xanthan may be increased. Further, when ammonium bicarbonate remains in the refractory, there is a possibility that cracks may not be formed immediately after formation of the refractory material, but cracks may be formed in the refractory material at a high temperature in the future.

After the second slurry is sufficiently stirred, acetic acid is added to the second slurry to form a third slurry.

The acetic acid serves to initiate a chain exothermic reaction and may be included in an amount of 0.1 to 2 parts by weight based on 100 parts by weight of nickel.

If the acetic acid is contained in an amount of less than 0.1 part by weight based on 100 parts by weight of nickel, the initial exothermic reaction does not sufficiently take place and a chain exothermic reaction may not occur. When the acetic acid is contained in an amount exceeding 2 parts by weight, It can act as an impurity of the carbon (C) component.

The third slurry may comprise nickel, a water-based liquid, ammonium bicarbonate, and acetic acid.

Further, the method for producing a refractory for producing a nickel powder of the present invention may further comprise the step of pouring the third slurry into a refractory-like mold after the step of producing the third slurry.

Nickel and acetic acid contained in the third slurry start the first reaction according to Scheme 1 above. That is, the first reaction in which a portion of nickel reacts with acetic acid to form nickel acetate (C 4 H 6 NiO 4 ) and hydrogen gas (H 2 ) is an exothermic reaction. The heat generated by the first reaction causes the second reaction and the third The reaction takes place in a cascade. In particular, the second reaction in the reaction formula 2 is a reaction in which nickel and oxygen in the atmosphere react with each other to form nickel oxide by the heat generated by the first reaction, and the second reaction is also an exothermic reaction.

The second reaction continues with the heat due to the first reaction and the second reaction, and the third reaction proceeds with the second reaction. The third reaction is a reaction according to the reaction formula 3, and is a decomposition reaction in which the reaction proceeds at about 80 캜. The third reaction is an endothermic reaction using heat generated by the first reaction and the second reaction, and ammonium bicarbonate contained in the third slurry is decomposed into ammonia (NH 3 ), water (H 2 O), and carbon dioxide (CO 2 ) . According to the third reaction, ammonium bicarbonate is decomposed to form pores and a porous refractory can be formed.

Manufacturing method of nickel powder

3 is a process diagram for a method of manufacturing a nickel powder according to another embodiment of the present invention.

Referring to FIG. 3, the method for producing a nickel powder of the present invention includes the steps of: (S5) preparing a porous refractory material containing nickel oxide; Charging a nickel metal raw material into the porous refractory (S6); Evaporating the nickel metal raw material to form a nickel vapor (S7); And condensing the nickel vapor to form a nickel powder (S8).

The step (S5) of producing the porous refractory material containing nickel oxide comprises: (S1) mixing nickel and an aqueous liquid to prepare a first slurry; Adding an ammonium bicarbonate (NH 4 HCO 3) in the first slurry to prepare a second slurry (S2); To prepare a third slurry by the addition of acetic acid (CH 3 COOH) in the second slurry (S3); (S4) of producing a porous refractory having pores formed through a series exothermic reaction of the third slurry, and the method of manufacturing the refractory for producing a nickel powder described above may be omitted. do.

The refractory for preparing the nickel powder may be composed of a single composition consisting only of nickel oxide.

The step of heating to evaporate the nickel metal material is conducted in an inert gas atmosphere such as He, Ar, Xe, Ne, but not this is limited, O 2, CH 4, C 6 H 6, NH 4 , such as an active gas atmosphere Lt; / RTI >

The evaporated nickel metal raw material may be cooled while colliding with an inert gas.

The average particle diameter of the nickel powder is not particularly limited, but may be, for example, 100 nm or less.

In the method for producing the nickel powder, the particle size of the nickel powder can be controlled by adjusting the temperature of the evaporation source, the kind of atmosphere gas, and the pressure.

Examples of the method for heating the nickel metal raw material include a resistance heating method in which a raw material is placed on a filament and evaporated, a laser heating method in which a raw material is irradiated with a high frequency laser, and an induction heating method. It can be heated.

The high temperature plasma can stably vaporize the high melting point, low vapor pressure material, and the compound form of the powder to be produced can be variously determined.

Specifically, the nickel metal raw material can be heated and evaporated at an ultra-high temperature by using thermal plasma such as arc plasma or high-frequency discharge in an inert gas.

When the refractory is formed of nickel oxide, there is no fear that the refractory will melt when the nickel metal raw material is heated. Even if it is melted, it is decomposed into nickel (Ni) and oxygen (O 2 )

Therefore, a high purity nickel powder can be produced.

Next, nickel powder can be produced by condensing the nickel vapor to form a powder.

The nickel powder produced by the method for producing a nickel powder according to the present invention may have a high purity because the content of impurities is small.

The impurity content of the nickel powder is not particularly limited, but may be, for example, 100 ppm or less.

In addition, the refractory structure for producing a nickel powder has a high heat insulating property, thereby enhancing the melting and vaporization of nickel, thereby increasing the production amount of nickel powder.

Hereinafter, embodiments of the present invention will be described in more detail with reference to experimental data of Examples and Comparative Examples of the present invention.

Experimental Example

Table 1 below shows data on the characteristics of the refractory for producing nickel powder formed according to the amount of ammonium bicarbonate added.

The carbon content of the nickel powder formed by using the refractory for producing nickel powder, the cracking rate, the porosity and the refractory for producing nickel powder was measured.

The refractory for producing nickel powder of Table 1 was produced according to the method for producing the refractory for producing nickel powder according to one embodiment of the present invention, and the nickel, the water-based liquid, the ammonium bicarbonate, and the lithium salt contained in the first slurry, the second slurry, The content of acetic acid is as follows.

Nickel: 2000 g, aqueous liquid (water): 200 g, acetic acid: 0.5 g

Sample nickel
(g) Ammonium bicarbonate
(g) The weight percentage of ammonium bicarbonate to 100 parts by weight of nickel Whether cracks are generated Porosity (%) Carbon content of nickel powder (ppm) One* 2000 One 0.05 Not generated 0.5 74 2 2000 5 0.25 Not generated One 74 3 2000 16 0.8 Not generated 5 75 4 2000 32 1.6 Not generated 10 79 5 2000 60 3 Not generated 20 76 6 2000 90 4.5 Not generated 27 81 7 2000 100 5 Not generated 33 85 8* 2000 120 6 Not generated 40 201 9 * 2000 150 7.5 produce 42 253

*: Comparative Example

As shown in Table 1, when ammonium bicarbonate is contained in an amount of less than 0.25 parts by weight based on 100 parts by weight of nickel, the porosity is less than 1%, which may hinder the heat insulation of the refractory for producing nickel powder.

Also, in the case where ammonium bicarbonate is contained in an amount exceeding 5 parts by weight based on 100 parts by weight of nickel, the amount of carbon produced in the refractory for producing nickel powder formed due to ammonium bicarbonate, It can be seen that the carbon content of the powder is high. That is, there is a problem that the impurity content of the nickel powder is increased in the production of the nickel powder by using the refractory for the production of nickel powder in which ammonium bicarbonate is added in an amount exceeding 5 parts by weight.

Further, when ammonium bicarbonate is added excessively, cracks may be generated in the refractory for producing the produced nickel powder.

Therefore, it is preferable that the ammonium bicarbonate is contained in an amount of 0.25 to 5 parts by weight based on 100 parts by weight of the nickel.

Table 2 below shows the impurities of the nickel powder prepared using the refractory for producing nickel powder and the magnesium-chromium (Mg-Ca) refractory and the carbon (C) refractory according to the comparative example according to the embodiment of the present invention. Data.

In the experiment shown in Table 2, each of the refractories was charged with a nickel source metal and heat-treated at 1650 ° C for 2 hours in an Ar gas atmosphere.

Then, the components of the metal material were analyzed using ICP-ES (Inductively Coupled Plasma-Emission Spectroscopy).

The results of the impurity component analysis are shown in Table 2 below, and all the units are expressed in mg / Kg.

Co Fe Mg Zr Ca Si Cr C Al One 51 26 4.8 7.2 7.1 4.8 4.8 50 10 2* 49 24 12 5.8 6.4 5.5 32 49 8.8 3 * 45 26 4.9 6.2 5.9 5.7 4.8 200 9.1 4 41 25 5.4 5.3 7.6 5.2 5.2 75 9.5

*: Comparative Example

1 shows the results of the analysis of the components of the raw materials before the experiment, 2 shows the results of the analysis of the components after the experiment using the Mg-Cr refractory, 3 shows the results of the components using the C refractory, It is the result of analyzing the components after the experiment using the nickel oxide refractory.

As shown in Table 1, when Mg-Cr refractory was used, Mg increased to 12 mg / Kg, which was 4.8 mg / Kg, and Al increased to 32 mg / Kg, which was 4.8 mg / Kg.

Also, as in sample 3, the amount of C, which was 50 mg / Kg, increased to 2000 mg / Kg when C refractory was used.

That is, in the case of the Mg-Cr refractory and the C refractory, the composition (Mg, Cr, C) constituting the refractory during melting of the metal raw material melts together with the raw material and acts as an impurity.

According to Table 2, in the case of sample 4, which is an embodiment of the present invention, the amounts of raw materials before and after the experiment are similar when nickel oxide refractories are used. Therefore, when a refractory made of nickel oxide is used, a high-purity nickel powder can be produced without increasing the amount of impurities.

The embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings may be exaggerated for clarity of description, and the elements denoted by the same reference numerals in the drawings are the same elements.

1: groundwork
10: Refractory for the production of nickel powder

Claims (14)

Nickel and an aqueous liquid to prepare a first slurry;
Adding ammonium bicarbonate (NH 4 HCO 3 ) to the first slurry to prepare a second slurry;
Adding acetic acid (CH 3 COOH) to the second slurry to prepare a third slurry; And
Preparing a porous refractory having pores through a series exothermic reaction of the third slurry;
Wherein the refractory material is a refractory material.
The method according to claim 1,
Wherein the nickel is in powder form.
The method according to claim 1,
Wherein the content of ammonium bicarbonate (NH 4 HCO 3 ) is 0.25 to 5 parts by weight based on 100 parts by weight of the nickel.
The method according to claim 1,
Wherein the content of acetic acid (CH 3 COOH) is 0.1 to 2 parts by weight based on 100 parts by weight of the nickel.
The method according to claim 1,
Wherein the content of the aqueous liquid is 5 to 20 parts by weight based on 100 parts by weight of the nickel.
The method according to claim 1,
The chain exothermic reaction to the second reaction, and the ammonium bicarbonate to the balance of the oxygen in the first reaction, the nickel reaction to the reaction part and the acetic acid (CH 3 COOH) of the nickel contained in the third slurry (NH 4 HCO 3 ) is decomposed, and the second reaction and the third reaction are initiated by the heat formed by the first reaction.
The method according to claim 1,
And pouring the third slurry into a mold of refractory shape after the step of producing the second slurry.
Refractory for the production of nickel powder containing nickel oxide and forming pores.
9. The method of claim 8,
Wherein the nickel oxide is nickel oxide (NiO).
9. The method of claim 8,
A refractory for producing nickel powder having a porosity of 20% or more.
Producing a porous refractory comprising nickel oxide;
Charging a nickel metal raw material into the porous refractory;
Evaporating the nickel metal raw material to form a nickel vapor; And
Condensing the nickel vapor to form a powder;
≪ / RTI >
11. The method of claim 10,
Wherein the step of preparing the porous refractory comprises: preparing a first slurry by mixing nickel and an aqueous liquid; preparing a second slurry by adding ammonium bicarbonate (NH 4 HCO 3 ) to the first slurry; Adding acetic acid (CH 3 COOH) to the slurry to prepare a third slurry, and producing a porous refractory material containing nickel oxide through a series exothermic reaction of the third slurry.
12. The method of claim 11,
The chain exothermic reaction to the second reaction, and the ammonium bicarbonate to the balance of the oxygen in the first reaction, the nickel reaction to the reaction part and the acetic acid (CH 3 COOH) of the nickel contained in the third slurry (NH 4 HCO 3 ) is decomposed, wherein the second reaction and the third reaction are initiated by the heat formed by the first reaction.
11. The method of claim 10,
Wherein the step of forming the nickel vapor comprises heating the nickel metal raw material in an inert gas atmosphere.
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