CN102747221B - Make the method for cold-pressing balls of iron content granular material - Google Patents
Make the method for cold-pressing balls of iron content granular material Download PDFInfo
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- CN102747221B CN102747221B CN201210195942.0A CN201210195942A CN102747221B CN 102747221 B CN102747221 B CN 102747221B CN 201210195942 A CN201210195942 A CN 201210195942A CN 102747221 B CN102747221 B CN 102747221B
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Abstract
The invention provides a kind of iron content granular material and make the method for cold-pressing balls: crush ferrous material, obtain raw material；According to the water content of raw material, correspondingly add the binding agent of multi-form, it is ensured that the water content in final raw material is 5%～6%, sends into ball press cold compaction ball, dries, and prepares the cold-pressing balls of iron content granular material.The present invention makes the method for cold-pressing balls and is applicable to that the Iron grade of Iron grade 28%～40% is low, the granular material of balling-up difference, and prepared cold-pressing balls high temperature is not easily decomposed, resistance to compression, that drop resistant beats intensity is high；The wide material sources of used binding agent, low price.
Description
Technical field
The invention belongs to cold-pressing balls technical field, relate to a kind of method making cold-pressing balls, be specifically related to one iron content
Granular material makes the method for cold-pressing balls.
Background technology
Coal-pressing ball is that material required in production mixes rear cold compaction ball with binding agent, forms through low temperature drying
's.Have construction investment province, technological process is simple and processing charges is relatively low, extensively (granularity is typically at 3mm for the selection of powder particles scope
Hereinafter, part even can be at below 5mm) feature.It is currently mainly applied to the preparation of ferroalloy raw material, combined reducing agent
Preparation, the recycling of metallurgical dust sludge and iron ore concentrate add the industries such as powdered carbon ball.Its key technology be compacting balling-up intensity,
Can high temperature (700～800 DEG C) spalling degree etc. meet process requirements.The method that current ferrous material makes cold-pressing balls is mainly
It for Iron grade more than 50%, is applied to the high-grade ferrous material of the industries such as blast furnace ironmaking, pneumatic steelmaking, DRI,
And the preparation method of the low-grade ferrous material cold-pressing balls that iron content is below 40% does not has more research, if directly adopted
By the cold-pressing balls preparation method of high-grade material, the cold-pressing balls that manufacturing cost is high, make will be brought to be not suitable with subsequent production work
The problem of skill.
Content of the invention
In order to overcome above-mentioned problems of the prior art, it is an object of the invention to provide one iron content granular material
Making the method for cold-pressing balls, prepared cold-pressing balls is at high temperature not easily decomposed, and cost is relatively low.
For achieving the above object, the technical solution adopted in the present invention is: one iron content granular material makes cold-pressing balls
Method, specifically sequentially include the following steps:
Step 1: broken ferrous material, obtains raw material；
Step 2: the raw material in step 1 is detected:
If the water content in raw material is 5%～6%, then by weight 100: 9.5:4.5, by this raw material, natural clay and six
Aqueous magnesium chloride mixes, and stirs, and sends into ball press cold compaction ball, dries, and prepares the cold-pressing balls of iron content granular material；
If water content ＜ in raw material 5%, then:
According to the gross weight of the raw material that step 1 obtains, take magnesium chloride hexahydrate, the weight of taken magnesium chloride hexahydrate and this raw material
Ratio is 3～5:100, by soluble in water for the magnesium chloride hexahydrate being taken, forms magnesium chloride brine；Obtain step 1 is all former
Material mixes with natural clay, and the weight of this raw material and natural clay ratio for 100:8～10, stirs, obtains material；To prepare
All materials and all magnesium chloride brine mixing and stirring, send into ball press cold compaction ball, dry, prepare iron content powdery
The cold-pressing balls of material；
Or, if water content ＜ in raw material 5%, then add water to, in the raw material of step 1, stir, obtain water content
The raw material that adds water of 5%～6%, by weight 100:9.5:4.5, by fully mixed to this raw material that adds water, natural clay and magnesium chloride hexahydrate
Close, stir, send into ball press cold compaction ball, dry, prepare the cold-pressing balls of iron content granular material.
The method that the present invention makes cold-pressing balls has the advantage that
1) it is applicable to that Iron grade is low, the granular material of balling-up difference, under normal circumstances Iron grade 28%～40%.
2) it is high that the cold-pressing balls high temperature preparing is not easily decomposed, resistance to compression, drop resistant beat intensity.
3) wide material sources of used binding agent, low price；Ton finished ball cost reduces by 20 compared with conventional binders
More than Yuan.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in detail.
The invention provides a kind of iron content granular material and make the method for cold-pressing balls, specifically sequentially include the following steps:
Step 1: crush ferrous material, obtains the raw material of particle diameter≤3mm；
Step 2: the raw material in step 1 is detected:
If the water content in raw material is 5%～6%, then by weight 100:9.5:4.5, by this raw material, natural clay and six
Aqueous magnesium chloride (MgCl2·6H2O) it is sufficiently mixed, stirs, send into ball press, under the pressure of 12～16MPa, cold compaction
Ball, is then fed into dryer low temperature drying, prepares the cold-pressing balls of iron content granular material；
If water content ＜ in raw material 5%, then:
According to the gross weight of the raw material that step 1 obtains, take magnesium chloride hexahydrate, the weight of taken magnesium chloride hexahydrate and this raw material
Ratio is 3～5:100, by soluble in water for the magnesium chloride hexahydrate being taken, forms the magnesium chloride brine of concentration 55～65%；By step 1
The all raw materials obtaining mix with natural clay, and the weight of this raw material and natural clay ratio for 100:8～10, stirs,
To material；By prepared all materials and all magnesium chloride brine mixing and stirring, send into ball press, at 12～16MPa
Pressure under, cold compaction ball, be then fed into dryer low temperature drying, prepare iron content granular material cold-pressing balls；
Or, if water content ＜ in raw material 5%, then add water to, in the raw material of step 1, stir, obtain water content
The raw material that adds water of 5%～6%, by weight 100:9.5:4.5, by fully mixed to this raw material that adds water, natural clay and magnesium chloride hexahydrate
Close, stir, send into ball press, under the pressure of 12～16MPa, cold compaction ball, be then fed into dryer low temperature drying, system
Obtain the cold-pressing balls of iron content granular material.
Natural clay is a kind of hydrous alumino silicates product, is through long-term weathering and ground by rock containing feldspar in the earth's crust
The effect of matter and generate, be divided into extensively in nature, of a great variety, reserve is enriched, and is the natural resources of a kind of preciousness.Tool
Have the processing performances such as particle is thin, plasticity is strong, associativity is good, and thixotropy is excessive, and it is suitable to shrink, and refractoriness is high.
Industrial hex-ammoniate many by seawater, salt lake and salt well water through evaporation, purify and prepare, these aboundresources and cheap.
Industrial hex-ammoniate usually contains the crystallization water of six molecules, easy deliquescence, is placed in dry air meeting weathering and loses the crystallization water, molten
Point is of a relatively high, for aspects such as pottery, filling fabric, papermaking, has caking property and heat-resisting quantity, is mainly used as refractory material
With the adhesive building furnace wall.
Natural clay and industrial hex-ammoniate are inorganic bond, and both combine and can make full use of that clay plasticity is strong, knot
The good feature of conjunction property and industrial hex-ammoniate fusing point is high, be difficult to lose the feature of viscosity under high temperature, respectively reaches raising wet bulb strong
The purpose of cold-pressing balls intensity after degree and drying；And two kinds of raw material sources are extensive, cheap.
Embodiment 1
Ferrous material is crushed, obtains the raw material of particle diameter≤3mm；The water content that detection obtains this raw material is 5%；By weight
This raw material, natural clay and magnesium chloride hexahydrate are sufficiently mixed, stir by ratio 100:9.5:4.5, send into ball press,
Under 12MPa pressure, cold compaction ball, it is then fed into dryer low temperature drying, prepare the cold-pressing balls of iron content granular material.
The method using embodiment 1 prepares the cold-pressing balls of iron content granular material, and the main performance of this cold-pressing balls is single with employing
The main performance contrast of cold-pressing balls prepared by one binding agent, as shown in table 1.
Table 1 method of embodiment 1 prepares the cold-pressing balls of iron content granular material, and the main performance of this cold-pressing balls is single with employing
The main performance contrast of cold-pressing balls prepared by one binding agent.
As can be seen from Table 1, natural clay and industrial hex-ammoniate belong to inorganic binder, and the feature of its maximum is exactly high temperature
Under be not easily decomposed, individually add natural clay and industrial hex-ammoniate, the intensity of ball is relatively poor, but after both combinations, intensity is notable
Increasing, binding agent cost is also low compared with other binding agents, and industrial hex-ammoniate contains 6 crystallizations water, to lose in drying course
Remove 4-5 the crystallization water, therefore relative to other inorganic binders for, the impurity brought into lack.
Embodiment 2
Ferrous material is crushed, obtains the raw material of particle diameter≤3mm；The water content that detection obtains this raw material is 6%；By weight
This raw material, natural clay and magnesium chloride hexahydrate are sufficiently mixed, stir by ratio 100:9.5:4.5, send into ball press,
Under 16MPa pressure, cold compaction ball, it is then fed into dryer low temperature drying, prepare the cold-pressing balls of iron content granular material.
Embodiment 3
Ferrous material is crushed, obtains the raw material of particle diameter≤3mm；The water content that detection obtains this raw material is 5.5%；By weight
This raw material, natural clay and magnesium chloride hexahydrate are sufficiently mixed, stir by amount ratio 100:9.5:4.5, send into ball press,
Under 14MPa pressure, cold compaction ball, it is then fed into dryer low temperature drying, prepare the cold-pressing balls of iron content granular material.
Embodiment 4
Ferrous material is crushed, obtains the raw material of particle diameter≤3mm；The water content that detection obtains this raw material is 4.5%；According to
The gross weight of raw material, takes magnesium chloride hexahydrate, and the weight of taken magnesium chloride hexahydrate and this raw material is than for 3:100, six water that will be taken
Magnesium chloride is soluble in water, forms the magnesium chloride brine of concentration 55%；All raw materials are mixed with natural clay, this raw material and sky
The weight of right clay ratio for 100:8, stirs, obtains material；Prepared all materials and all magnesium chloride brines are mixed
Conjunction stirs, and sends into ball press, under the pressure of 13MPa, cold compaction ball, is then fed into dryer low temperature drying, prepares and contains
The cold-pressing balls of iron granular material.
Embodiment 5
Ferrous material is crushed, obtains the raw material of particle diameter≤3mm；The water content that detection obtains this raw material is 3%；According to former
The gross weight of material, takes magnesium chloride hexahydrate, and the weight of taken magnesium chloride hexahydrate and this raw material ratio is for 5:100, the six water chlorine that will be taken
Change magnesium soluble in water, form the magnesium chloride brine of concentration 65%；Mix all raw materials with natural clay, raw material is viscous with natural
The weight of soil ratio for 100:10, stirs, obtains material；Prepared all materials and all magnesium chloride brines are mixed and stirs
Mix uniformly, send into ball press, under the pressure of 15MPa, cold compaction ball, be then fed into dryer low temperature drying, prepare iron content powder
The cold-pressing balls of shape material.
Embodiment 6
Ferrous material is crushed, obtains the raw material of particle diameter≤3mm；The water content that detection obtains this raw material is 3.5%；According to
The gross weight of raw material, takes magnesium chloride hexahydrate, and the weight of taken magnesium chloride hexahydrate and this raw material is than for 4:100, six water that will be taken
Magnesium chloride is soluble in water, forms the magnesium chloride brine of concentration 60%；All raw materials are mixed with natural clay, raw material with natural
The weight of clay, than for 100:9, stirs, obtains material；Prepared all materials and all magnesium chloride brines are mixed
Stir, send into ball press, under the pressure of 12MPa, cold compaction ball, be then fed into dryer low temperature drying, prepare iron content
The cold-pressing balls of granular material.
Embodiment 7
Ferrous material is crushed, obtains the raw material of particle diameter≤3mm；The water content that detection obtains this raw material is 4.8%；By water
Add in raw material, stir, obtain the raw material that adds water of water content 5%～6%, by weight 100:9.5:4.5, this is added water former
Material, natural clay and magnesium chloride hexahydrate are sufficiently mixed, and stir, and send into ball press, under the pressure of 16MPa, cold compaction ball,
It is then fed into dryer low temperature drying, prepare the cold-pressing balls of iron content granular material.
Claims (4)
1. the method with iron content granular material making cold-pressing balls, it is characterised in that the method specifically sequentially includes the following steps:
Step 1: broken ferrous material, obtains raw material；
Step 2: the raw material in step 1 is detected:
If the water content in raw material is 5%～6%, then by weight 100: 9.5:4.5, by this raw material, natural clay and six water chlorine
Change magnesium mixing, stir, send into ball press cold compaction ball, dry, prepare the cold-pressing balls of iron content granular material；
If water content ＜ in raw material 5%, then:
According to the gross weight of the raw material that step 1 obtains, taking magnesium chloride hexahydrate, taken magnesium chloride hexahydrate with the weight ratio of this raw material is
3～5:100, by soluble in water for the magnesium chloride hexahydrate being taken, forms magnesium chloride brine；All raw materials that step 1 is obtained with
Natural clay mixes, and the weight of this raw material and natural clay ratio for 100:8～10, stirs, obtains material；By prepared institute
Have material and all magnesium chloride brine mixing and stirring, send into ball press cold compaction ball, dry, prepare iron content granular material
Cold-pressing balls；
Or, if water content ＜ in raw material 5%, then add water to, in the raw material of step 1, stir, obtain water content 5%～
This raw material that adds water, natural clay and magnesium chloride hexahydrate, by weight 100:9.5:4.5, are sufficiently mixed, stir by the raw material that adds water of 6%
Mix uniformly, send into ball press cold compaction ball, dry, prepare the cold-pressing balls of iron content granular material.
2. iron content granular material according to claim 1 makes the method for cold-pressing balls, it is characterised in that described step 1
Particle diameter≤the 3mm of middle raw material.
3. iron content granular material according to claim 1 makes the method for cold-pressing balls, it is characterised in that described step 2
In under the pressure of 12MPa～16MPa, cold compaction ball.
4. iron content granular material according to claim 1 makes the method for cold-pressing balls, it is characterised in that described step 2
The concentration of middle magnesium chloride brine is 55%～65%.
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| CN102747221B true CN102747221B (en) | 2016-10-05 |
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| CN105714108A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Pellet binder and pellet produced therefrom |
| CN107298945A (en) * | 2017-07-05 | 2017-10-27 | 郑州振东科技有限公司 | The high-strength adhesive of pressure ball is reclaimed for dust material |
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