CN102747221A - Method for making cold-pressed balls through using powdery material containing iron - Google Patents
Method for making cold-pressed balls through using powdery material containing iron Download PDFInfo
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- CN102747221A CN102747221A CN2012101959420A CN201210195942A CN102747221A CN 102747221 A CN102747221 A CN 102747221A CN 2012101959420 A CN2012101959420 A CN 2012101959420A CN 201210195942 A CN201210195942 A CN 201210195942A CN 102747221 A CN102747221 A CN 102747221A
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Abstract
The invention provides a method for making cold-pressed balls through using a powdery material containing iron. The method comprises the following steps: fragmenting the powdery material containing iron to obtain a raw material; and correspondingly adding binders having different forms according to the water content of the raw material to guarantee the water content of the final raw material between 5% and 6%, sending to a ball press, cold-pressing to prepare balls, and drying the balls to the cold-pressed balls of the powdery material containing iron. The cold-pressed ball making method is suitable for low iron grade and bad balling property powdery materials with the iron grade being 28-40%, and the prepared cold-pressed balls has the advantages of difficult decomposition at a high temperature, stress resistance, and high beat resistance strength; and the used binders have wide sources and low prices.
Description
Technical field
The invention belongs to the cold-pressing balls technical field, relate to a kind of method of making cold-pressing balls, be specifically related to a kind of method of making cold-pressing balls with the iron content pulverulent material.
Background technology
Coal-pressing ball is that required material and sticker in the production are mixed back cold compaction ball, forms through cryodrying.Have that construction investment is economized, technical process reaches simply that processing charges is lower, the powder particles scope is selected the characteristics of wide (granularity generally below 3mm, part even can be below 5mm).Be mainly used in the preparation of the preparation of iron alloy raw material, combined reductive agent at present, the recycling and the iron ore concentrate of metallurgical dust mud adds industries such as powdered carbon system ball.Its gordian technique is that can intensity, high temperature (700～800 ℃) the explosion degree etc. of compacting balling-up satisfy process requirements.The method of the cold-pressing balls of ferrous material making at present mainly is more than 50% to the iron grade; Be applied to the higher-grade ferrous material of industries such as blast furnace ironmaking, converter steelmaking, dri; And iron level does not have more research in the making method of the low-grade ferrous material cold-pressing balls below 40%; If directly adopt the cold-pressing balls making method of higher-grade material, the problem of the cold-pressing balls incompatibility subsequent production technology of will bring the manufacturing cost height, processing.
Summary of the invention
In order to overcome the problem that exists in the above-mentioned prior art, the purpose of this invention is to provide a kind of method of making cold-pressing balls with the iron content pulverulent material, the cold-pressing balls that makes at high temperature is difficult for decomposing, and cost is lower.
For realizing above-mentioned purpose, the technical scheme that the present invention adopted is: a kind of method of making cold-pressing balls with the iron content pulverulent material, specifically carry out according to the following steps:
Step 1: broken ferrous material obtains raw material;
Step 2: the raw material in the step 1 detects:
If the water cut in the raw material is 5%～6%, then by weight 100: 9.5:4.5, this raw material, natural clay and magnesium chloride hexahydrate are mixed, stir, send into ball press cold compaction ball, dry, make the cold-pressing balls of iron content pulverulent material;
If water cut＜5% in the raw material, then:
The gross weight of the raw material that obtains according to step 1 is got magnesium chloride hexahydrate, the weight ratio of the magnesium chloride hexahydrate of getting and this raw material be 3～5:100, the magnesium chloride hexahydrate of being got is soluble in water, form magnesium chloride brine; All raw materials that step 1 is obtained mix with natural clay, and the weight ratio of this raw material and natural clay is 100:8～10, stirs, and obtains material; With all materials that make and all magnesium chloride brine mixing and stirring, send into ball press cold compaction ball, dry, make the cold-pressing balls of iron content pulverulent material;
Perhaps, if water cut＜5% in the raw material then adds water in the raw material of step 1; Stir, what obtain water cut 5%～6% adds the water raw material, by weight 100:9.5:4.5; This is added water raw material, natural clay and magnesium chloride hexahydrate thorough mixing, stir, send into ball press cold compaction ball; Dry, make the cold-pressing balls of iron content pulverulent material.
The method that the present invention makes cold-pressing balls has the following advantages:
1) be applicable to that the iron grade is low, the pulverulent material of balling-up property difference, generally the iron grade 28%～40%.
2) the cold-pressing balls high temperature that makes is difficult for decomposition, resistance to compression, the anti-intensity height of beating.
3) wide material sources of the sticker that uses, low price; Comparing ton finished ball cost with conventional sticker reduces more than 20 yuan.
Embodiment
Below in conjunction with embodiment the present invention is elaborated.
The invention provides a kind of method of making cold-pressing balls, specifically carry out according to the following steps with the iron content pulverulent material:
Step 1:, obtain the raw material of particle diameter≤3mm with the ferrous material fragmentation;
Step 2: the raw material in the step 1 detects:
If the water cut in the raw material is 5%～6%, then by weight 100:9.5:4.5, with this raw material, natural clay and magnesium chloride hexahydrate (MgCl
26H
2O) thorough mixing stirs, and sends into ball press, and under the pressure of 12～16MPa, the cold compaction ball is sent into the dryer oven drying at low temperature then, makes the cold-pressing balls of iron content pulverulent material;
If water cut＜5% in the raw material, then:
The gross weight of the raw material that obtains according to step 1 is got magnesium chloride hexahydrate, the weight ratio of the magnesium chloride hexahydrate of getting and this raw material be 3～5:100, the magnesium chloride hexahydrate of being got is soluble in water, form the magnesium chloride brine of concentration 55～65%; All raw materials that step 1 is obtained mix with natural clay, and the weight ratio of this raw material and natural clay is 100:8～10, stirs, and obtains material; With all materials that make and all magnesium chloride brine mixing and stirring, send into ball press, under the pressure of 12～16MPa, the cold compaction ball is sent into the dryer oven drying at low temperature then, makes the cold-pressing balls of iron content pulverulent material;
Perhaps, if water cut＜5% in the raw material then adds water in the raw material of step 1, stir; What obtain water cut 5%～6% adds the water raw material, by weight 100:9.5:4.5, this is added water raw material, natural clay and magnesium chloride hexahydrate thorough mixing; Stir, send into ball press, under the pressure of 12～16MPa; The cold compaction ball is sent into the dryer oven drying at low temperature then, makes the cold-pressing balls of iron content pulverulent material.
Natural clay is a kind of hydrous alumino silicates product, generates by containing long-term weathering of process of feldspar rock and geological effect in the earth's crust, is divided into extensively at occurring in nature, and of a great variety, reserve is abundant, is a kind of natural resource of preciousness.Have that particle is thin, plasticity-is strong, associativity is good, thixotropy is excessive, and it is suitable to shrink, use characteristics such as refractoriness height.
Industrial hex-ammoniate is many to make these aboundresources and cheapness by seawater, salt lake and salt well water through evaporation, purification.Industrial hex-ammoniate contains the crystal water of six molecules usually, is prone to deliquescence, places the dry air can weathering and lose crystal water; Fusing point is higher relatively; Be used for aspects such as pottery, filling fabric, papermaking, have cohesiveness and high thermal resistance, mainly as refractory materials and the tackiness agent of building the furnace wall.
Natural clay and industrial hex-ammoniate are inorganic adhesive; Both make up and can make full use of clay plasticity is strong, associativity is good characteristics and the industrial hex-ammoniate fusing point is high, high temperature is difficult for forfeiture viscosity down characteristics, reach the purpose that improves wet bulb intensity and oven dry back cold-pressing balls intensity respectively; And two kinds of raw material sources are extensive, cheap.
Embodiment 1
With the ferrous material fragmentation, obtain the raw material of particle diameter≤3mm; The water cut that detection obtains this raw material is 5%; By weight 100:9.5:4.5, with this raw material, natural clay and magnesium chloride hexahydrate thorough mixing, stir, send into ball press, under 12MPa pressure, the cold compaction ball is sent into the dryer oven drying at low temperature then, makes the cold-pressing balls of iron content pulverulent material.
The method of employing embodiment 1 prepares the cold-pressing balls of iron content pulverulent material, and the salient features of this cold-pressing balls contrasts with the salient features of the cold-pressing balls that adopts single adhesive preparation, and is as shown in table 1.
Table 1 prepares the cold-pressing balls of iron content pulverulent material with the method for embodiment 1, the salient features contrast of the salient features of this cold-pressing balls and the cold-pressing balls that adopts single adhesive preparation.
Can find out that from table 1 natural clay and industrial hex-ammoniate all belong to mineral binder bond, its maximum characteristics are exactly to be difficult under the high temperature decomposing; Add natural clay and industrial hex-ammoniate separately, the intensity of ball is relatively poor relatively, and intensity significantly increases but both make up afterwards; The sticker cost is also low than other sticker, and industrial hex-ammoniate contains 6 crystal water, in drying course, will lose 4-5 crystal water; Therefore relative other mineral binder bond, the impurity of bringing into will lack.
Embodiment 2
With the ferrous material fragmentation, obtain the raw material of particle diameter≤3mm; The water cut that detection obtains this raw material is 6%; By weight 100:9.5:4.5, with this raw material, natural clay and magnesium chloride hexahydrate thorough mixing, stir, send into ball press, under 16MPa pressure, the cold compaction ball is sent into the dryer oven drying at low temperature then, makes the cold-pressing balls of iron content pulverulent material.
Embodiment 3
With the ferrous material fragmentation, obtain the raw material of particle diameter≤3mm; The water cut that detection obtains this raw material is 5.5%; By weight 100:9.5:4.5, with this raw material, natural clay and magnesium chloride hexahydrate thorough mixing, stir, send into ball press, under 14MPa pressure, the cold compaction ball is sent into the dryer oven drying at low temperature then, makes the cold-pressing balls of iron content pulverulent material.
Embodiment 4
With the ferrous material fragmentation, obtain the raw material of particle diameter≤3mm; The water cut that detection obtains this raw material is 4.5%; According to the gross weight of raw material, get magnesium chloride hexahydrate, the weight ratio of the magnesium chloride hexahydrate of getting and this raw material be 3:100, the magnesium chloride hexahydrate of being got is soluble in water, form the magnesium chloride brine of concentration 55%; All raw materials are mixed with natural clay, and the weight ratio of this raw material and natural clay is 100:8, stirs, and obtains material; With all materials that make and all magnesium chloride brine mixing and stirring, send into ball press, under the pressure of 13MPa, the cold compaction ball is sent into the dryer oven drying at low temperature then, makes the cold-pressing balls of iron content pulverulent material.
Embodiment 5
With the ferrous material fragmentation, obtain the raw material of particle diameter≤3mm; The water cut that detection obtains this raw material is 3%; According to the gross weight of raw material, get magnesium chloride hexahydrate, the weight ratio of the magnesium chloride hexahydrate of getting and this raw material be 5:100, the magnesium chloride hexahydrate of being got is soluble in water, form the magnesium chloride brine of concentration 65%; All raw materials are mixed with natural clay, and the weight ratio of raw material and natural clay is 100:10, stirs, and obtains material; With all materials that make and all magnesium chloride brine mixing and stirring, send into ball press, under the pressure of 15MPa, the cold compaction ball is sent into the dryer oven drying at low temperature then, makes the cold-pressing balls of iron content pulverulent material.
Embodiment 6
With the ferrous material fragmentation, obtain the raw material of particle diameter≤3mm; The water cut that detection obtains this raw material is 3.5%; According to the gross weight of raw material, get magnesium chloride hexahydrate, the weight ratio of the magnesium chloride hexahydrate of getting and this raw material be 4:100, the magnesium chloride hexahydrate of being got is soluble in water, form the magnesium chloride brine of concentration 60%; All raw materials are mixed with natural clay, and the weight ratio of raw material and natural clay is 100:9, stirs, and obtains material; With all materials that make and all magnesium chloride brine mixing and stirring, send into ball press, under the pressure of 12MPa, the cold compaction ball is sent into the dryer oven drying at low temperature then, makes the cold-pressing balls of iron content pulverulent material.
Embodiment 7
With the ferrous material fragmentation, obtain the raw material of particle diameter≤3mm; The water cut that detection obtains this raw material is 4.8%; Water is added in the raw material, stir, what obtain water cut 5%～6% adds the water raw material; By weight 100:9.5:4.5, this is added water raw material, natural clay and magnesium chloride hexahydrate thorough mixing, stir; Send into ball press, under the pressure of 16MPa, the cold compaction ball; Send into the dryer oven drying at low temperature then, make the cold-pressing balls of iron content pulverulent material.
Claims (4)
1. method of making cold-pressing balls with the iron content pulverulent material is characterized in that this method is specifically carried out according to the following steps:
Step 1: broken ferrous material obtains raw material;
Step 2: the raw material in the step 1 detects:
If the water cut in the raw material is 5%～6%, then by weight 100: 9.5:4.5, this raw material, natural clay and magnesium chloride hexahydrate are mixed, stir, send into ball press cold compaction ball, dry, make the cold-pressing balls of iron content pulverulent material;
If water cut＜5% in the raw material, then:
The gross weight of the raw material that obtains according to step 1 is got magnesium chloride hexahydrate, the weight ratio of the magnesium chloride hexahydrate of getting and this raw material be 3～5:100, the magnesium chloride hexahydrate of being got is soluble in water, form magnesium chloride brine; All raw materials that step 1 is obtained mix with natural clay, and the weight ratio of this raw material and natural clay is 100:8～10, stirs, and obtains material; With all materials that make and all magnesium chloride brine mixing and stirring, send into ball press cold compaction ball, dry, make the cold-pressing balls of iron content pulverulent material;
Perhaps, if water cut＜5% in the raw material then adds water in the raw material of step 1; Stir, what obtain water cut 5%～6% adds the water raw material, by weight 100:9.5:4.5; This is added water raw material, natural clay and magnesium chloride hexahydrate thorough mixing, stir, send into ball press cold compaction ball; Dry, make the cold-pressing balls of iron content pulverulent material.
2. method of making cold-pressing balls with the iron content pulverulent material according to claim 1 is characterized in that the particle diameter≤3mm of raw material in the said step 1.
3. method of making cold-pressing balls with the iron content pulverulent material according to claim 1 is characterized in that, in the said step 2 under the pressure of 12MPa～16MPa, the cold compaction ball.
4. method of making cold-pressing balls with the iron content pulverulent material according to claim 1 is characterized in that the concentration of magnesium chloride brine is 55%～65% in the said step 2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210195942.0A CN102747221B (en) | 2012-06-14 | 2012-06-14 | Make the method for cold-pressing balls of iron content granular material |
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|---|---|---|---|
| CN201210195942.0A CN102747221B (en) | 2012-06-14 | 2012-06-14 | Make the method for cold-pressing balls of iron content granular material |
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| CN102747221A true CN102747221A (en) | 2012-10-24 |
| CN102747221B CN102747221B (en) | 2016-10-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Publication number | Publication date |
|---|---|
| CN102747221B (en) | 2016-10-05 |
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