CN103409619A - Cooled agglomerated pellet and preparation method thereof - Google Patents
Cooled agglomerated pellet and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a cooled agglomerated pellet. Fly ash, sinter and sludge glue of a converter are mixed and processed by a high-pressure pelletizer to manufacture pellets; the sludge glue comprises sludge, corn starch, caustic soda flack and borax which are mixed for preparation. The invention also provides a preparation method for the cooled agglomerated pellet. has According to the invention, the following benefits are achieved: sludge, corn starch, caustic soda flack and borax are utilized to prepare sludge glue, the sludge glue is utilized to mix and press fly ash, sinter and other ferriferous raw materials to obtain the pellet, moisture in sludge and sticky property of sludge are fully utilized, and sludge does not need to be press-filtered and dried, so that steps are simplified, energy consumption is saved, and the cost is lowered; as the sludge glue replaces a binder, environmental pollution is reduced.
Description
Technical field
The present invention relates to the cooled agglomerated pellet production technical field, particularly a kind of cooled agglomerated pellet and preparation method thereof.
Background technology
Steel-smelting sewage sludge is the byproduct of oxidation top blown converter dedusting, it is a kind of secondary resource of preciousness, it is high that steel-smelting sewage sludge has iron-holder, basic oxide content is high, fine size, water content is high, the characteristics such as viscosity is large, at present, one of steel-smelting sewage sludge secondary utilization method is through press filtration by steel-smelting sewage sludge, after oven dry, with dedusting ash, the ferrous materials such as iron scale mix, by organic gel as binding agent, by nodulizer, make cooled agglomerated pellet, returning to steel-making uses as refrigerant and slag former, this method need be carried out press filtration by mud, after oven dry, mix again balling-up, complex steps, energy consumption increases, in addition, binding agent not only increases cost also can be to environment.
Summary of the invention
The object of the invention is to the above-mentioned defect for prior art, a kind of cooled agglomerated pellet is provided, take full advantage of sludge characteristics, reduce costs, reduce the pollution to environment.
Another object of the present invention is to provide a kind of preparation method of cooled agglomerated pellet, without mud is carried out to press filtration, oven dry, simplify step, energy efficient, reduce costs.
Purpose of the present invention can realize by following technical measures:
A kind of cooled agglomerated pellet, described cooled agglomerated pellet is mixed and is made pelletizing by the high pressure nodulizer by converter dust-removing ash, iron scale, mud glue, and by mass percentage, the proportioning of described each component of cooled agglomerated pellet is as follows: converter dust-removing ash 1-75%, iron scale 1-75%, mud glue 2-25%; Described mud glue is mixed with by mud, W-Gum, sheet alkali and borax, and by mass percentage, described mud glue component proportion is as follows: mud 30-90%, W-Gum 8-60%, sheet alkali 0.5-20%, borax 0.5-20%.
Preferably, the water ratio of described mud is 50-95%.
Preferably, the ferrous grade of described mud is greater than 30%.
Preferably, in described mud glue, the mass ratio of mud, W-Gum, sheet alkali and borax is 81:16:2:1.
Preferably, the ultimate compression strength of described cooled agglomerated pellet is greater than 1500N.
The present invention provides the method for above-mentioned cooled agglomerated pellet on the other hand, comprises the following steps:
The preparation of a, mud glue:
By following mass percent, mud, W-Gum, sheet alkali and borax are uniformly mixed, prepare mud glue, wherein, mud 30-90%, W-Gum 1-60%, sheet alkali 0.5-30%, borax 0.5-30%;
B, batching:
By following mass percent, take converter dust-removing ash, iron scale and the step a gained mud glue of respective component, wherein, converter dust-removing ash 1-75%, iron scale 1-75%, mud glue 2-25%;
C, mix:
By step b gained ingredients mixture stirring and evenly mixing, insert in nodulizer;
D, pelletizing, cold solid:
Start nodulizer, by step c gained mixture pelletizing, balling-up obtains cooled agglomerated pellet by dry solidification.
Preferably, before described step a, also comprise the steps: to measure water ratio and the ferrous grade of mud.
Preferably, the water ratio of described mud is 50-95%.
Preferably, the ferrous grade of described mud is greater than 30%.
Preferably, in described mud glue, the mass ratio of mud, W-Gum, sheet alkali and borax is 81:16:2:1.
Beneficial effect of the present invention is, utilize mud, W-Gum, sheet alkali and borax to be prepared into mud glue, recycling mud glue mixes the compacting balling-up by dedusting ash and iron scale, take full advantage of the moisture in mud, without mud is carried out to press filtration, oven dry, simplify step, energy efficient, reduce costs, with mud glue, substitute binding agent simultaneously, reduced the pollution to environment.
The accompanying drawing explanation
Fig. 1 is preparation method's the schema of the cooled agglomerated pellet of the embodiment of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The present invention utilizes mud, W-Gum, sheet alkali and borax to be prepared into mud glue, recycling mud glue mixes the compacting balling-up by dedusting ash and iron scale, take full advantage of the moisture in mud, without mud is carried out to press filtration, oven dry, simplify step, energy efficient, reduce costs, with mud glue, substitute binding agent simultaneously, reduced the pollution to environment.
The embodiment of the present invention provides a kind of cooled agglomerated pellet, by iron-bearing material such as converter dust-removing ash, iron scale etc., with mud glue, mix and make pelletizing by the high pressure nodulizer, by mass percentage, the proportioning of described each component of cooled agglomerated pellet is as follows: converter dust-removing ash 1-75%, iron scale 1-75%, mud glue 2-25%; Described mud glue is mixed with by mud, W-Gum, sheet alkali and borax, and by mass percentage, described mud glue component proportion is as follows: mud 30-90%, W-Gum 8-60%, sheet alkali 0.5-20%, borax 0.5-20%.
Mud of the present invention is the byproduct of oxidation top blown converter dedusting, is a kind of secondary resource of preciousness, and it is high that steel-smelting sewage sludge has iron-holder, and basic oxide content is high, fine size, the characteristics such as water content is high, and viscosity is large; Converter dust-removing ash of the present invention produces after dry method dust for blast furnace, and iron-holder is high, is also callable secondary resource; Iron scale of the present invention is that steel forge in the course of processing, and the airborne oxygen contact of iron and steel produces oxidizing reaction and forms, and main component is ferric oxide.
Particularly, the cooled agglomerated pellet of the embodiment of the present invention substitutes binding agent with mud glue, has reduced cost, has reduced the pollution to environment.
The embodiment of the present invention also provides a kind of preparation method of cooled agglomerated pellet, as shown in Figure 1, comprises the following steps:
The preparation of step S1, mud glue:
By following mass percent, mud, W-Gum, sheet alkali and borax are uniformly mixed, prepare mud glue, wherein, mud 30-90%, W-Gum 8-60%, sheet alkali 0.5-20%, borax 0.5-20%;
Step S2, batching:
By following mass percent, take converter dust-removing ash, iron scale and the step S1 gained mud glue of respective component, wherein, converter dust-removing ash 1-75%, iron scale 1-75%, mud glue 2-25%;
Step S3, mix:
By step S2 gained ingredients mixture stirring and evenly mixing, insert in nodulizer;
Step S4, pelletizing, cold solid:
Start nodulizer, by step S3 gained mixture pelletizing, balling-up obtains cooled agglomerated pellet by dry solidification.
Particularly, the preparation method of the cooled agglomerated pellet of the embodiment of the present invention, utilize mud, W-Gum, sheet alkali and borax to be prepared into mud glue, recycling mud glue mixes the compacting balling-up by dedusting ash and iron scale, takes full advantage of the moisture in mud, without mud is carried out to press filtration, oven dry, simplify step, energy efficient, reduce costs, do not use simultaneously binding agent, reduced the pollution to environment.
According to the present invention, at first prepare mud glue, mud, W-Gum, sheet alkali and borax are uniformly mixed, prepare mud glue, wherein, each constituent mass ratio is: mud 30-90%, W-Gum 8-60%, sheet alkali 0.5-20%, borax 0.5-20%; More preferably, in mud glue, the mass ratio of mud, W-Gum, sheet alkali and borax is 81:16:2:1.In mud, contain moisture, in the process of preparation mud glue, sheet alkali is met the water very exothermic makes W-Gum form paste shape, and without heating in addition, and the viscosity of mud itself is utilized.
Prepare burden subsequently, by mass percentage, the proportioning of each component of cooled agglomerated pellet is as follows: converter dust-removing ash 1-75%, iron scale 1-75%, mud glue 2-25%.
By gained ingredients mixture stirring and evenly mixing, insert in nodulizer subsequently.
Finally start nodulizer, by gained mixture pelletizing, balling-up obtains cooled agglomerated pellet by dry solidification.
Before preparation mud glue, water ratio and the ferrous grade of mud detected, generally, selecting water ratio is 50-95%, ferrous grade is greater than 30% the mud raw material as preparation mud glue; For the ease of comparing, the moisture percentage in sewage sludge used in following examples is 77%, and ferrous grade is 52%.
Embodiment 1:
The embodiment of the present invention 1 provides a kind of preparation method of cooled agglomerated pellet, comprises the steps:
The preparation of a, mud glue:
By following mass percent, mud, W-Gum, sheet alkali and borax are uniformly mixed, prepare mud glue, wherein, mud 30%, W-Gum 60%, sheet alkali 5%, borax 5%;
B, batching:
By following mass percent, take converter dust-removing ash, iron scale and the step a gained mud glue of respective component, wherein, converter dust-removing ash 40%, iron scale 52%, mud glue 8%;
C, mix:
By step b gained ingredients mixture stirring and evenly mixing, insert in nodulizer;
D, pelletizing, cold solid:
Start nodulizer, by step c gained mixture pelletizing, balling-up obtains cooled agglomerated pellet by dry solidification.
Embodiment 2-embodiment 7:
Embodiment 2-embodiment 5 provides respectively the preparation method of cooled agglomerated pellet, with embodiment 1, compares the main mass percent that has changed mud, W-Gum, sheet alkali and borax in step a mud glue, and other condition is constant, specifically changes parameter as shown in table 1:
The parameter of table 1 embodiment 2-embodiment 7
The cooled agglomerated pellet prepared to embodiment 1-7 carries out sampling and testing, and concrete test result refers to shown in table 2.
The test result of the cooled agglomerated pellet ultimate compression strength that table 2 embodiments of the invention 1-7 is prepared
Embodiment 8:
Embodiments of the invention 8 provide a kind of preparation method of cooled agglomerated pellet, comprise the steps:
The preparation of a, mud glue:
Detect water ratio and the ferrous grade of mud; The selection water ratio is 50-95%, and ferrous grade is greater than 50% mud as the raw material of preparing mud glue;
Mud, W-Gum, sheet alkali and borax are uniformly mixed, prepare mud glue, wherein, in mud, the mass ratio of moisture, W-Gum, sheet alkali and borax is 69:26:4:1;
B, batching:
By following mass percent, take converter dust-removing ash, iron scale and the step a gained mud glue of respective component, wherein, converter dust-removing ash 40%, iron scale 53%, mud glue 7%;
C, mix:
By step b gained ingredients mixture stirring and evenly mixing, insert in nodulizer;
D, pelletizing, cold solid:
Start nodulizer, by step c gained mixture pelletizing, balling-up obtains cooled agglomerated pellet by dry solidification.
Embodiment 9:
Embodiment 9 provides the preparation method of cooled agglomerated pellet, with embodiment 8, compares the key distinction and is, converter dedusting ash in step b, iron scale, the mass percent difference of mud glue, other condition is constant, the converter dust-removing ash, iron scale, the mass percent of mud glue is respectively 51%, 41%, 8%.
Embodiment 10:
Embodiment 10 provides the preparation method of cooled agglomerated pellet, with embodiment 8, comparing the key distinction is, converter dedusting ash in step b, iron scale, the mass percent difference of mud glue, other condition is constant, the converter dust-removing ash, iron scale, the mass percent of mud glue is respectively 50%, 44%, 6%.
Embodiment 11:
Embodiment 11 provides the preparation method of cooled agglomerated pellet, with embodiment 8, comparing the key distinction is, converter dedusting ash in step b, iron scale, the mass percent difference of mud glue, other condition is constant, the converter dust-removing ash, iron scale, the mass percent of mud glue is respectively 36%, 59%, 5%.
Embodiment 12:
Embodiment 12 provides the preparation method of cooled agglomerated pellet, with embodiment 8, comparing the key distinction is, converter dedusting ash in step b, iron scale, the mass percent difference of mud glue, other condition is constant, the converter dust-removing ash, iron scale, the mass percent of mud glue is respectively 22%, 71%, 7%.
Embodiment 13:
Embodiment 13 provides the preparation method of cooled agglomerated pellet, with embodiment 8, comparing the key distinction is, converter dedusting ash in step b, iron scale, the mass percent difference of mud glue, other condition is constant, the converter dust-removing ash, iron scale, the mass percent of mud glue is respectively 17%, 75%, 8%.
Embodiment 14:
Embodiment 14 provides the preparation method of cooled agglomerated pellet, with embodiment 8, comparing the key distinction is, converter dedusting ash in step b, iron scale, the mass percent difference of mud glue, other condition is constant, the converter dust-removing ash, iron scale, the mass percent of mud glue is respectively 80%, 5%, 15%.
Embodiment 15:
Embodiment 15 provides the preparation method of cooled agglomerated pellet, with embodiment 8, comparing the key distinction is, converter dedusting ash in step b, iron scale, the mass percent difference of mud glue, other condition is constant, the converter dust-removing ash, iron scale, the mass percent of mud glue is respectively 45%, 45%, 10%.
The cooled agglomerated pellet prepared to embodiment 8-15 carries out sampling and testing, and concrete test result refers to shown in table 3.
The test result of the cooled agglomerated pellet ultimate compression strength that table 3 embodiments of the invention 8-11 is prepared
Cooled agglomerated pellet ultimate compression strength prepared by embodiment 1-15 is greater than 1500N, the needs that meet transhipment and produce, wherein, in mud glue, the mass percent of each component is mud 30-90%, W-Gum 8-60%, sheet alkali 0.5-20%, borax 0.5-20%, embodiment 4 has beyond thought beneficial effect, the ultimate compression strength maximum of the cooled agglomerated pellet that embodiment 4 is prepared, embodiment 8-15 is according to the proportioning of the mud glue of embodiment 4, mud in mud glue, W-Gum, the mass ratio of sheet alkali and borax is 81:16:2:1, prepared cooled agglomerated pellet has higher ultimate compression strength, in the cooled agglomerated pellet component, the mass ratio of converter dedusting ash and iron scale is little on the impact of cooled agglomerated pellet finished product, the mass percent of mud glue is 2-25%.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. cooled agglomerated pellet, it is characterized in that, described cooled agglomerated pellet is mixed and is made pelletizing by the high pressure nodulizer by converter dust-removing ash, iron scale, mud glue, by mass percentage, the proportioning of described each component of cooled agglomerated pellet is as follows: converter dust-removing ash 1-75%, iron scale 1-75%, mud glue 2-25%; Described mud glue is mixed with by mud, W-Gum, sheet alkali and borax, and by mass percentage, described mud glue component proportion is as follows: mud 30-90%, W-Gum 8-60%, sheet alkali 0.5-20%, borax 0.5-20%.
2. cooled agglomerated pellet according to claim 1, is characterized in that, the water ratio of described mud is 50-95%.
3. cooled agglomerated pellet according to claim 2, is characterized in that, the ferrous grade of described mud is greater than 30%.
4. cooled agglomerated pellet according to claim 3, is characterized in that, in described mud glue, the mass ratio of mud, W-Gum, sheet alkali and borax is 81:16:2:1.
5. cooled agglomerated pellet according to claim 1, is characterized in that, the ultimate compression strength of described cooled agglomerated pellet is greater than 1500N.
6. prepare the method for cooled agglomerated pellet claimed in claim 1, it is characterized in that, comprise the following steps:
The preparation of a, mud glue:
By following mass percent, mud, W-Gum, sheet alkali and borax are uniformly mixed, prepare mud glue, wherein, mud 30-90%, W-Gum 1-60%, sheet alkali 0.5-30%, borax 0.5-30%;
B, batching:
By following mass percent, take converter dust-removing ash, iron scale and the step a gained mud glue of respective component, wherein, converter dust-removing ash 1-75%, iron scale 1-75%, mud glue 2-25%;
C, mix:
By step b gained ingredients mixture stirring and evenly mixing, insert in nodulizer;
D, pelletizing, cold solid:
Start nodulizer, by step c gained mixture pelletizing, balling-up obtains cooled agglomerated pellet by dry solidification.
7. method according to claim 6, is characterized in that, before described step a, also comprises the steps: to measure water ratio and the ferrous grade of mud.
8. method according to claim 6, is characterized in that, the water ratio of described mud is 50-95%.
9. method according to claim 6, is characterized in that, the ferrous grade of described mud is greater than 30%.
10. method according to claim 6, is characterized in that, in described mud glue, the mass ratio of mud, W-Gum, sheet alkali and borax is 81:16:2:1.
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| CN106086398A (en) * | 2016-05-09 | 2016-11-09 | 江苏省冶金设计院有限公司 | Coal-pressing ball compound binding agent and the method being used for smelting slag molding |
| CN106755980A (en) * | 2016-12-14 | 2017-05-31 | 钢城集团凉山瑞海实业有限公司 | Coal-pressing ball and preparation method thereof |
| CN110699543A (en) * | 2019-11-22 | 2020-01-17 | 中南大学 | Method for preparing iron ore sintered pellet binder by using steel oily sludge, binder and application |
| CN113215395A (en) * | 2021-05-18 | 2021-08-06 | 新疆八一钢铁股份有限公司 | Production method of cold-solidified pellet |
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Effective date of registration: 20200814 Address after: 430080 No. 6, No. 2 Middle Road, Mechanic Repair Workshop, Qingshan District, Wuhan City, Hubei Province Patentee after: WISCO Zhongye Industrial Technology Service Co.,Ltd. Address before: 436099 new housing village, Xishan street, Hubei, Ezhou Patentee before: EZHOU FEIYA LIFEI Co.,Ltd. |