CN105483328A - Fluoride-free composite slag melting furnace charge and preparation method thereof - Google Patents
Fluoride-free composite slag melting furnace charge and preparation method thereof Download PDFInfo
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- CN105483328A CN105483328A CN201410478086.9A CN201410478086A CN105483328A CN 105483328 A CN105483328 A CN 105483328A CN 201410478086 A CN201410478086 A CN 201410478086A CN 105483328 A CN105483328 A CN 105483328A
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Abstract
The invention provides fluoride-free composite slag melting furnace charge and a preparation method thereof. The preparation method of the fluoride-free composite slag melting furnace charge comprises the steps that manganese dioxide, iron oxide, aluminum oxide and silicon dioxide are used as the main raw materials and are crushed and mixed; calcium oxide, an organic bonding agent and a water stirring briquette are added; maintenance is conducted; and the finished product is obtained through roasting. The fluoride-free composite slag melting furnace charge replaces sheet iron or fluorite for slag smelting and has the beneficial effects that operation is stable, the probability of splashing, adhesion to guns and backflow is lowered, the smelting time is shortened, steel material consumption is reduced, and the environment is protected. Meanwhile, the loss of a converter lining can be reduced, the service life of a converter can be prolonged, fluoride pollution in circulating water of the converter is eliminated, and the service life of the slag line portion of a molten steel bin is prolonged; in addition, rapid slag melting and cooling can be achieved, and the grade of steel is improved. Furthermore, the metal yield can be increased easily, dephosphorization can be achieved in advance, the dephosphorization rate is increased, and the production cost is reduced.
Description
Technical field
The invention belongs to the slag making slag technical field that steel-making is smelted, is a kind of floride-free compound slagging furnace charge and preparation method thereof specifically.
Background technology
Cleaner production is the direction of 21 century sustainable development of iron and steel industry, and resource unnecessary waste, environmental pollution are serious, has been real production problem urgently to be resolved hurrily owing to making steel the diversity of furnace charge, iron and steel enterprise's production cost height.Smelting as steel-making adopts the various single furnace charges such as fluorite usually, makes it to have slag making slag and is swift in response and is widely used.But in actual applications, on the one hand, because fluorite raw material itself is containing fluorine composition, so in smelting process, by the discharge of the recycling waste water containing fluorine, pollution environmental protection; On the other hand, fluorite raw material is fluorine-containing, has corrosive nature to furnace lining, reduces the work-ing life of furnace lining; Again on the one hand, the ton cost compare height of fluorite raw material is 1000 yuan per ton, and need to consume a large amount of fluorite raw material because smelting, respective belt carrys out the raising of production cost.
Summary of the invention
In view of above-mentioned present situation, the object of this invention is to provide a kind of floride-free compound slagging furnace charge and preparation method thereof, namely reduce costs, again can raising slag speed, have cooling rapidly, protection furnace lining, environmental protection and energy saving.
For achieving the above object, technical scheme of the present invention is:
A kind of floride-free compound slagging furnace charge is made up of the raw material of following weight per-cent:
Ferric oxide 20-30%
Manganse Dioxide 10-20%
Aluminium sesquioxide 20-30%
Silicon-dioxide 20-30%
Calcium oxide 3-10%
Organic bond 1.5-3.5%
Water 0.5-2.5%
Described organic bond is polyvinyl alcohol.
Described furnace charge is block.
A kind of preparation method of floride-free compound slagging furnace charge comprises:
(1), ferric oxide, Manganse Dioxide, aluminium sesquioxide, silica material are carried out respectively be crushed to 80 orders;
(2), by the raw material of above-mentioned pulverizing mix, and add calcium oxide, organic bond, water stirring and evenly mixing, briquetting;
(3), dry maintenance;
(4), roasting send stoving oven to heat 500 DEG C, continues to be finished product in 40 minutes.In the present invention, described raw material adds calcium oxide, water carries out stirring briquetting and refers to patty solid piece; Spherical solid block.
In the present invention, indication calcium oxide is the calcium oxide powder (lime) selecting finished product; Or to after calcium oxide blocks hydrolyzable, be processed to form lime.
In a word, the effect that a kind of floride-free compound slagging furnace charge of the present invention and preparation method thereof has is: it substitutes iron sheet or carrying out of fluorite slag.Smouldered by raw materials such as red bauxite, Wingdale, brown iron oxide, metallurgical bond agent, coke form through high temperature sintering, steam.
Its main component is aluminium sesquioxide, ferric oxide, silicon-dioxide, calcium oxide etc.On the one hand, it is for stable operation, reduces splash, sticky rifle, returns in phenomenon, shorten the heat, improving environment economic target, reduction steel technology, protection of the environment.On the other hand, converter lining loss can be reduced, can furnace life be improved, eliminate the pollution of fluorine in converter recirculated water, improve the life-span of molten steel storehouse slag lining, in smelting process, improve the desulfuration ability of converter, and can Fast Slag Melting, cooling, improve steel taste., made steel by free-floride meanwhile, not only reduce the erosion of furnace lining, increase the service life, be conducive to improving recovery rate of iron, realize dephosphorization in advance, improve dephosphorization rate, shorten the heat, can also furnace temperature be reduced, reduce production cost.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment
Raw material is chosen by following weight percent:
Ferric oxide 23%
Manganse Dioxide 10%
Aluminium sesquioxide 25%
Silicon-dioxide 29%
Calcium oxide 8%
Organic bond 2.5-%
Water 1.5%
Its production method is as follows:
1, ferric oxide, aluminium sesquioxide, silica material are carried out respectively be crushed to 80 orders, for subsequent use;
2, the raw material of above-mentioned pulverizing is mixed, and add calcium oxide, water stirring and evenly mixing, be pressed into spherical solid block;
3, by the spherical solid block seasoning maintenance containing moisture;
4, finally will slough the spherical solid block roasting of moisture, and send stoving oven to heat 500 DEG C, and keep 40 minutes, go out stoving oven and be finished product.
In embodiments of the invention, involved block-type, except for except bulk, also can be pressed into patty solid piece, can meet service requirements equally.
Claims (3)
1. floride-free compound slagging furnace charge and preparation method thereof, it is made up of the raw material of following weight per-cent:
Ferric oxide 20-30%
Manganse Dioxide 10-20%
Aluminium sesquioxide 20-30%
Silicon-dioxide 20-30%
Calcium oxide 3-10%
Organic bond 1.5-3.5%
Water 0.5-2.5%
By the floride-free compound slagging furnace charge of one according to claim 1, it is characterized in that, described organic bond is polyvinyl alcohol.
2. by the floride-free compound slagging furnace charge of one according to claim 1, it is characterized in that, described furnace charge is block.
3., by floride-free compound slagging furnace charge of one according to claim 3 and preparation method thereof, it is characterized in that, described preparation method comprises:
(1), ferric oxide, Manganse Dioxide, aluminium sesquioxide, silica material are carried out respectively be crushed to 80 orders;
(2), by the raw material of above-mentioned pulverizing mix, and add calcium oxide, organic bond, water stirring and evenly mixing, briquetting;
(3), dry maintenance;
(4), roasting send stoving oven to heat 500 DEG C, continues to be finished product in 40 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410478086.9A CN105483328A (en) | 2014-09-19 | 2014-09-19 | Fluoride-free composite slag melting furnace charge and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410478086.9A CN105483328A (en) | 2014-09-19 | 2014-09-19 | Fluoride-free composite slag melting furnace charge and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105483328A true CN105483328A (en) | 2016-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410478086.9A Pending CN105483328A (en) | 2014-09-19 | 2014-09-19 | Fluoride-free composite slag melting furnace charge and preparation method thereof |
Country Status (1)
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| CN (1) | CN105483328A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115261550A (en) * | 2022-07-12 | 2022-11-01 | 山东钢铁股份有限公司 | Converter smelting method of low-silicon molten iron |
-
2014
- 2014-09-19 CN CN201410478086.9A patent/CN105483328A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115261550A (en) * | 2022-07-12 | 2022-11-01 | 山东钢铁股份有限公司 | Converter smelting method of low-silicon molten iron |
| CN115261550B (en) * | 2022-07-12 | 2024-03-29 | 山东钢铁股份有限公司 | Converter smelting method of low-silicon molten iron |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160413 |
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| WD01 | Invention patent application deemed withdrawn after publication |