JPS6138142B2 - - Google Patents
Info
- Publication number
- JPS6138142B2 JPS6138142B2 JP56051159A JP5115981A JPS6138142B2 JP S6138142 B2 JPS6138142 B2 JP S6138142B2 JP 56051159 A JP56051159 A JP 56051159A JP 5115981 A JP5115981 A JP 5115981A JP S6138142 B2 JPS6138142 B2 JP S6138142B2
- Authority
- JP
- Japan
- Prior art keywords
- zircon
- weight
- parts
- silica
- present
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 23
- 239000000377 silicon dioxide Substances 0.000 claims description 12
- 229910052845 zircon Inorganic materials 0.000 claims description 12
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 12
- 239000011449 brick Substances 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 238000004898 kneading Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 238000005245 sintering Methods 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000004927 clay Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 150000001341 alkaline earth metal compounds Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000011451 fired brick Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Description
本発明は、溶融金属容器の内張用焼成ジルコン
質れんがの製造法に関するものである。
ジルコン質耐火物は耐火性、耐食性に優れてい
るため、溶融金属容器の内張用として賞用されて
いる。ジルコン原料は溶融温度が高く、極めて焼
結し難い原料であるので、従来、アルカリ金属、
アルカリ土類金属類の化合物や粘土を混和して焼
結促進をさせて、1350℃以上の温度で焼成し成型
体を得ていた。ところが、省エネルギ化が急速に
進展している現在、焼成れんがを低温焼成化、不
焼成化することが急務となつてきている。
本発明は、従来1350℃以上の高温域で焼成して
いたジルコンれんがに較べて、その品質を低下さ
せずに1300℃以下の低温域での焼成で可能にした
もので、その要旨は、粒径５μ以下のシリカ超微
粉２〜７重量部と残部がジルコン80重量部以上か
らなり、粘土を含まない組成物に結合剤、水を添
加し、混練、成型、乾燥後、800〜1300℃で焼成
することを特徴とする溶融金属容器内張用焼成ジ
ルコン質れんがの製造法である。
従来品は主に粘土をボンドとして焼結したが、
その焼結機構は、粘土中に含まれるアルミナがジ
ルコンのシリカ分と化合してムライトを作ること
によるものであり、焼結には比較的高温を要し、
かつマトリツクス部の耐食性の劣化はまぬがれな
い。ところが、本発明のようにシリカの超微粉自
体低温焼結し、これをボンドにするとマトリツク
ス部にアルミナ分が入らないので、低温焼成にて
焼結し、しかも耐食性の劣化は従来品に比較して
少ない。
本発明で使用するシリカ超微粉は、シングルμ
以下で特に５μ以下が好ましく、５μ以上では焼
結効果が劣化する。原料源としては、シリカ原料
を超微粉砕したもの、蒸発シリカ、ゲル化シリカ
等があるが、一例として、フエロシリコン製造時
の蒸発シリカを捕集したものは、非晶質で活性が
あり好ましい例である。その使用量は２〜７重量
部が好ましく、２重量部以下では焼結効果が劣
り、使用時スラグ侵潤防止面でも効果が劣る。７
重量部以上では成形体の組織劣化をきたし、焼成
収縮、使用時収縮等容積安定性で問題である。
母材となる耐火材は、ジルコン質単味はもちろ
ん、他の電融アルミナ、焼結アルミナ等のアルミ
ナ質、珪石等のシリカ質、ムライト、ロー石等の
アルミナ―シリカ質等の耐火材との組合せでもよ
いが、ジルコン量としては80重量部以上が好まし
く、80重量部未満では耐食性が劣化する。結合剤
は粉末状サンエキス、パルプ廃液、CMC、合成
樹脂等有機質れんが材質への悪影響がない点で好
ましいが、水ガラス、リン酸塩等無機質でも可能
である。
焼成温度については800〜1300℃が好ましく、
800℃以下では焼結不足をきたし好ましくない。
1300℃以上でも可能であるが、本発明の一つの効
果である省エネ効果が薄れる。
次に本発明の実施例を表１に示すが、スラグへ
の耐食性で優れた効果を示している。
The present invention relates to a method for producing fired zircon bricks for lining molten metal containers. Zircon refractories have excellent fire resistance and corrosion resistance, so they are used as linings for molten metal containers. Zircon raw materials have a high melting temperature and are extremely difficult to sinter, so conventionally, alkali metals,
A molded body was obtained by mixing alkaline earth metal compounds and clay to accelerate sintering and firing at a temperature of 1,350°C or higher. However, as energy conservation is rapidly progressing, there is an urgent need to make fired bricks sintered at lower temperatures or unfired. The present invention makes it possible to fire zircon bricks at a low temperature of 1300°C or lower without degrading the quality, compared to the conventional zircon bricks that were fired at a high temperature of 1350°C or higher. A binder and water are added to a clay-free composition consisting of 2 to 7 parts by weight of ultrafine silica powder with a diameter of 5 μ or less and the balance is 80 parts by weight or more of zircon, and after kneading, molding, and drying, it is heated at 800 to 1300 °C. This is a method for producing fired zircon bricks for lining molten metal containers, which involves firing. Conventional products were mainly sintered using clay as a bond, but
The sintering mechanism is that the alumina contained in the clay combines with the silica content of zircon to create mullite, and sintering requires relatively high temperatures.
In addition, deterioration of the corrosion resistance of the matrix portion is inevitable. However, as in the present invention, when ultrafine silica powder itself is sintered at a low temperature and made into a bond, alumina does not enter the matrix, so it is sintered at a low temperature, and the corrosion resistance deteriorates compared to conventional products. There aren't many. The ultrafine silica powder used in the present invention is a single μ
It is particularly preferable that the thickness be less than 5μ, and if it is more than 5μ, the sintering effect will deteriorate. Raw material sources include ultrafine pulverized silica raw materials, evaporated silica, gelled silica, etc. As an example, evaporated silica collected during the production of ferrosilicon is amorphous and active. This is a preferable example. The amount used is preferably 2 to 7 parts by weight, and if it is less than 2 parts by weight, the sintering effect will be poor and the effect of preventing slag penetration during use will be poor. 7
If the amount is more than 1 part by weight, the structure of the molded product will deteriorate, and there will be problems with volume stability such as shrinkage during firing and shrinkage during use. The refractory material used as the base material is not only zircon alone, but also other alumina materials such as fused alumina and sintered alumina, silica materials such as silica stone, and alumina-silica materials such as mullite and low stone. However, the amount of zircon is preferably 80 parts by weight or more, and if it is less than 80 parts by weight, the corrosion resistance will deteriorate. The binder is preferably an organic material such as powdered sun extract, pulp waste liquid, CMC, or synthetic resin since it does not have an adverse effect on the brick material, but it is also possible to use an inorganic material such as water glass or phosphate. The firing temperature is preferably 800 to 1300℃,
If the temperature is below 800°C, sintering will be insufficient, which is not preferable.
Although it is possible to do this at a temperature of 1300° C. or higher, the energy saving effect, which is one of the effects of the present invention, will be diminished. Next, examples of the present invention are shown in Table 1, which show excellent effects in corrosion resistance to slag.
【表】
本発明品２を実際の取鍋に従来品と張分け使用
した結果、本発明品は未だ使用できる状態であつ
たが、従来品の損耗限界により終了した。
本発明により低温焼成にもかゝわらず、従来高
温焼成品よりも品質、耐食性、侵潤性等で優れた
ものが得られ、使用寿命延長に寄与するもであ
る。併せて省エネ効果にも寄与するものである。[Table] As a result of using the product 2 of the present invention in an actual ladle in combination with the conventional product, the product of the present invention was still usable, but due to the wear limit of the conventional product, the product was discontinued. The present invention makes it possible to obtain products that are superior in quality, corrosion resistance, invasiveness, etc. than conventional high-temperature fired products despite being fired at low temperatures, and contributes to extending the service life. It also contributes to energy saving effects.
Claims (1)
残部がジルコン80重量部以上からなり、粘土を含
まない組成物に結合剤、水を添加し、混練、成
型、乾燥後、800〜1300℃で焼成することを特徴
とする溶融金属容器内張用焼成ジルコン質れんが
の製造法。1 A binder and water are added to a clay-free composition consisting of 2 to 7 parts by weight of ultrafine silica powder with a particle size of 5 μ or less and the balance is 80 parts by weight or more of zircon, and after kneading, molding, and drying, A method for producing fired zircon bricks for lining molten metal containers, characterized by firing at °C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56051159A JPS57166363A (en) | 1981-04-07 | 1981-04-07 | Manufacture of baked zircon brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56051159A JPS57166363A (en) | 1981-04-07 | 1981-04-07 | Manufacture of baked zircon brick |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57166363A JPS57166363A (en) | 1982-10-13 |
| JPS6138142B2 true JPS6138142B2 (en) | 1986-08-27 |
Family
ID=12879041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56051159A Granted JPS57166363A (en) | 1981-04-07 | 1981-04-07 | Manufacture of baked zircon brick |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57166363A (en) |
-
1981
- 1981-04-07 JP JP56051159A patent/JPS57166363A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57166363A (en) | 1982-10-13 |
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