CN113604665A - Technological method for sintering ferroboron concentrate - Google Patents
Technological method for sintering ferroboron concentrate Download PDFInfo
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- CN113604665A CN113604665A CN202110922178.1A CN202110922178A CN113604665A CN 113604665 A CN113604665 A CN 113604665A CN 202110922178 A CN202110922178 A CN 202110922178A CN 113604665 A CN113604665 A CN 113604665A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
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Abstract
The invention discloses a process method for sintering ferroboron concentrate, which comprises the following steps: preparing vanadium-titanium magnetite concentrate powder, ferroboron concentrate powder, iron concentrate powder, lime powder, dolomite, fuel and return fines as raw materials; crushing the fuel, and adding water to wet the return ores; mixing all the raw materials with water, wherein the water accounts for 10-15% of the total weight of the raw materials, and the mixing time is 20-30 min; granulating the mixed raw materials, and adding water while granulating; the invention is suitable for mineral product sintering, and the invention applies ferroboron concentrate to mineral product sintering, namely when sintering metal ore, ferroboron concentrate powder is added into the sintering raw material, so that the finished product conversion rate of the sintering product material can be greatly improved by adding ferroboron concentrate powder during mineral product sintering.
Description
Technical Field
The invention belongs to the technical field of sintering, and particularly relates to a process method for sintering ferroboron concentrate.
Background
Sintering, namely, converting a powdery material into a compact, which is a traditional process, people can produce ceramics, powder metallurgy, refractory materials, ultra-high temperature materials and the like by the process very early, generally speaking, after powder is formed, the compact obtained by sintering is a polycrystalline material, the microstructure of the polycrystalline material consists of crystals, glass bodies and air holes, the sintering process directly influences the grain size, the air hole size and the shape and distribution of grain boundaries in the microstructure, the performance of an inorganic material is not only related to the material composition, but also has close relation with the microstructure of the material, through sintering, the metallurgical performance of raw materials can be improved, the sintering is also applied to the non-ferrous metal smelting process, and the sintering of non-ferrous metal sulfide concentrate has the function of desulfurization besides agglomeration;
in the existing sintering process, the conversion rate of the sintering raw materials is generally below 60 percent, and the conversion rate is low.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a process method for sintering ferroboron concentrate.
In order to achieve the purpose, the invention adopts the following technical scheme:
a process method for sintering ferroboron concentrate comprises the following specific steps:
(S1) preparing vanadium-titanium magnetite concentrate powder, ferroboron concentrate powder, iron concentrate powder, lime powder, dolomite, fuel and return fines as raw materials;
in the raw materials, vanadium-titanium magnetite concentrate powder accounts for 40-50%, ferroboron concentrate powder accounts for 10-20%, iron concentrate powder accounts for 5-10%, dolomite accounts for 5-8%, lime powder accounts for 5-10%, fuel accounts for 3-4.2%, and the balance is return fines;
(S2), crushing the fuel, and wetting the return ores by water;
(S3) adding water into all the raw materials, and mixing for 20-30min, wherein the added water accounts for 10-15% of the total weight of the raw materials;
(S4), granulating the mixed raw materials, and adding water while granulating;
(S5) distributing the particle mixture through a distributing machine, and then carrying out ignition sintering to prepare the hot sinter.
Preferably, the fuel is crushed in the step (S2) to a particle size of 2mm or less, and the fraction of the crushed particle size of 2mm or less accounts for 85% or more of the total fuel weight.
Preferably, the granulating temperature in the step (S4) is 50-55 ℃, and the granulating time is 2-4 min; in the obtained granular mixture, the part with the grain diameter of 12mm accounts for more than 95 percent of the whole granular mixture.
Preferably, the height of the material layer distributed in the step (S5) is 800mm, the ignition temperature is 1100-1200 ℃, and the ignition time is 70-90S.
Preferably, the method further comprises the following steps:
and (3) crushing and screening the hot sintering ore while the hot sintering ore is hot until the granularity is less than or equal to 130mm, removing the part with the granularity less than 10mm by screening, and cooling the rest part with the granularity more than or equal to 5mm to be less than or equal to 130 ℃ to obtain the cold sintering ore.
Preferably, the cold-sintered ore has a drum strength index of 65 to 70%, a reduction degradation index (RDI +3.15) of 85 to 90%, and a reduction degree index of 70 to 80%.
Preferably, the iron grade TFe of the ferroboron concentrate powder is 50.0-60.0%, and B2O33-10%, the granularity is less than or equal to 0.5mm, and the part with the granularity less than 0.08mm accounts for more than 85% of the total weight.
Preferably, the amount of water added in the granulation process in the step (S4) is 1-3% of the total weight of the raw materials.
The invention relates to a process method for sintering ferroboron concentrate, which is characterized in that ferroboron concentrate is applied to the sintering of mineral products, namely ferroboron concentrate powder is added into a sintering raw material during the sintering of metal ores, and the optimal proportion of Peng-Fe concentrate powder is obtained through continuous experimental comparison, so that the conversion rate of finished products of the sintered product materials can be greatly improved by adding ferroboron concentrate powder during the sintering of the mineral products.
Drawings
Fig. 1 is a block flow diagram of the overall process of the present invention for using ferroboron concentrate for sintering.
Detailed Description
The following description will further describe a specific embodiment of the process for sintering ferroboron concentrate according to the present invention with reference to fig. 1. The process of the present invention for using ferroboron concentrate for sintering is not limited to the description of the following examples.
Example 1:
the embodiment provides a process method for sintering ferroboron concentrate, which comprises the following specific steps:
s1, preparing vanadium-titanium magnetite concentrate powder, ferroboron concentrate powder, iron concentrate powder, lime powder, dolomite, fuel and return fines as raw materials;
in the raw materials, vanadium-titanium magnetite concentrate powder accounts for 40%, ferroboron concentrate powder accounts for 10%, iron concentrate powder accounts for 5%, dolomite accounts for 5%, lime powder accounts for 5%, fuel accounts for 3%, and the balance is return fines;
s2, crushing the fuel, and wetting the return ores by adding water;
s3, adding water into all the raw materials, and mixing for 20min, wherein the added water accounts for 10% of the total weight of the raw materials;
s4, granulating the mixed raw materials, and adding water during granulation;
and S5, distributing the particle mixture through a distributing machine, and then performing ignition sintering to prepare the hot sinter.
In the step S2, the crushed granularity of the fuel is less than or equal to 2mm, and the part with the crushed granularity less than or equal to 2mm accounts for more than 85 percent of the total weight of the fuel.
In the step S4, the granulating temperature is 50 ℃, and the granulating time is 2 min; in the obtained granular mixture, the part with the grain diameter of 12mm accounts for more than 95 percent of the whole granular mixture.
In step S5, the height of the material layer of the cloth is 800mm, the ignition temperature is 1100 ℃, and the ignition time is 70S.
Further comprising the steps of:
and (3) crushing and screening the hot sintering ore while the hot sintering ore is hot until the granularity is less than or equal to 130mm, removing the part with the granularity less than 10mm by screening, and cooling the rest part with the granularity more than or equal to 5mm to be less than or equal to 130 ℃ to obtain the cold sintering ore.
The drum strength index of the cold sintering ore is 65 percent, the reduction degradation index RDI +3.15 is 85 to 90 percent, and the reduction degree index is 70 percent.
The iron grade TFe of the ferroboron concentrate powder is 50.0 percent, and B2O33 percent, the granularity is less than or equal to 0.5mm, and the part with the granularity less than 0.08mm accounts for more than 85 percent of the total weight.
The amount of water added during the granulation in step S4 was 1% based on the total weight of the raw materials.
Example 2:
the embodiment provides a process method for sintering ferroboron concentrate, which comprises the following specific steps:
s1, preparing vanadium-titanium magnetite concentrate powder, ferroboron concentrate powder, iron concentrate powder, lime powder, dolomite, fuel and return fines as raw materials;
in the raw materials, vanadium-titanium magnetite concentrate powder accounts for 50%, ferroboron concentrate powder accounts for 20%, iron concentrate powder accounts for 10%, dolomite accounts for 8%, lime powder accounts for 10%, fuel accounts for 4.2%, and the balance is return fines;
s2, crushing the fuel, and wetting the return ores by adding water;
s3, adding water into all the raw materials, and mixing for 30min, wherein the added water accounts for 15% of the total weight of the raw materials;
s4, granulating the mixed raw materials, and adding water during granulation;
and S5, distributing the particle mixture through a distributing machine, and then performing ignition sintering to prepare the hot sinter.
In the step S2, the crushed granularity of the fuel is less than or equal to 2mm, and the part with the crushed granularity less than or equal to 2mm accounts for more than 85 percent of the total weight of the fuel.
In the step S4, the granulating temperature is 55 ℃, and the granulating time is 2-4 min; in the obtained granular mixture, the part with the grain diameter of 12mm accounts for more than 95 percent of the whole granular mixture.
In step S5, the height of the material layer of the cloth is 800mm, the ignition temperature is 1200 ℃, and the ignition time is 90S.
Further comprising the steps of:
and (3) crushing and screening the hot sintering ore while the hot sintering ore is hot until the granularity is less than or equal to 130mm, removing the part with the granularity less than 10mm by screening, and cooling the rest part with the granularity more than or equal to 5mm to be less than or equal to 130 ℃ to obtain the cold sintering ore.
The drum strength index of the cold-sintered ore is 70%, the reduction degradation index RDI +3.15 is 90%, and the reduction degree index is 80%.
The iron grade TFe of the ferroboron concentrate powder is 60.0 percent, and B2O310 percent, the granularity is less than or equal to 0.5mm, and the part with the granularity less than 0.08mm accounts for more than 85 percent of the total weight.
The amount of water added during the granulation in step S4 was 2% of the total weight of the raw materials.
Example 3:
the embodiment provides a process method for sintering ferroboron concentrate, which comprises the following specific steps:
s1, preparing vanadium-titanium magnetite concentrate powder, ferroboron concentrate powder, iron concentrate powder, lime powder, dolomite, fuel and return fines as raw materials;
in the raw materials, vanadium-titanium magnetite concentrate powder accounts for 45%, ferroboron concentrate powder accounts for 15%, iron concentrate powder accounts for 8%, dolomite accounts for 7%, lime powder accounts for 8%, fuel accounts for 4%, and the balance is return fines;
s2, crushing the fuel, and wetting the return ores by adding water;
s3, adding water into all the raw materials, and mixing for 15min, wherein the added water accounts for 12% of the total weight of the raw materials;
s4, granulating the mixed raw materials, and adding water during granulation;
and S5, distributing the particle mixture through a distributing machine, and then performing ignition sintering to prepare the hot sinter.
In the step S2, the crushed granularity of the fuel is less than or equal to 2mm, and the part with the crushed granularity less than or equal to 2mm accounts for more than 85 percent of the total weight of the fuel.
In the step S4, the granulating temperature is 53 ℃, and the granulating time is 3 min; in the obtained granular mixture, the part with the grain diameter of 12mm accounts for more than 95 percent of the whole granular mixture.
In step S5, the height of the material layer of the cloth is 800mm, the ignition temperature is 1150 ℃, and the ignition time is 80S.
Further comprising the steps of:
and (3) crushing and screening the hot sintering ore while the hot sintering ore is hot until the granularity is less than or equal to 130mm, removing the part with the granularity less than 10mm by screening, and cooling the rest part with the granularity more than or equal to 5mm to be less than or equal to 130 ℃ to obtain the cold sintering ore.
The drum strength index of the cold sintering ore is 65-70%, the reduction degradation index RDI +3.15 is 85-90%, and the reduction degree index is 70-80%.
Iron grade TFe of ferroboron concentrate powder is 55.0%, B2O36 percent, the granularity is less than or equal to 0.5mm, and the part with the granularity less than 0.08mm accounts for more than 85 percent of the total weight.
The amount of water added during the granulation in step S4 was 3% of the total weight of the raw materials.
Example 4:
the embodiment provides a process method for sintering ferroboron concentrate, which comprises the following specific steps:
s1, preparing vanadium-titanium magnetite concentrate powder, ferroboron concentrate powder, iron concentrate powder, lime powder, dolomite, fuel and return fines as raw materials;
in the raw materials, vanadium-titanium magnetite concentrate powder accounts for 40%, ferroboron concentrate powder accounts for 10%, iron concentrate powder accounts for 5%, dolomite accounts for 5%, lime powder accounts for 5%, fuel accounts for 3%, and the balance is return fines;
s2, crushing the fuel, and wetting the return ores by adding water;
s3, adding water into all the raw materials, and mixing for 30min, wherein the added water accounts for 15% of the total weight of the raw materials;
s4, granulating the mixed raw materials, and adding water during granulation;
and S5, distributing the particle mixture through a distributing machine, and then performing ignition sintering to prepare the hot sinter.
In the step S2, the crushed granularity of the fuel is less than or equal to 2mm, and the part with the crushed granularity less than or equal to 2mm accounts for more than 85 percent of the total weight of the fuel.
In the step S4, the granulating temperature is 55 ℃, and the granulating time is 2-4 min; in the obtained granular mixture, the part with the grain diameter of 12mm accounts for more than 95 percent of the whole granular mixture.
In step S5, the height of the material layer of the cloth is 800mm, the ignition temperature is 1200 ℃, and the ignition time is 90S.
Further comprising the steps of:
and (3) crushing and screening the hot sintering ore while the hot sintering ore is hot until the granularity is less than or equal to 130mm, removing the part with the granularity less than 10mm by screening, and cooling the rest part with the granularity more than or equal to 5mm to be less than or equal to 130 ℃ to obtain the cold sintering ore.
The drum strength index of the cold-sintered ore is 70%, the reduction degradation index RDI +3.15 is 90%, and the reduction degree index is 80%.
The iron grade TFe of the ferroboron concentrate powder is 60.0 percent, and B2O310 percent of the powder with the granularity less than or equal to 0.5mm and the granularity less than 0.08mmAccounting for more than 85 percent of the total weight.
The amount of water added during the granulation in step S4 was 2% of the total weight of the raw materials.
Example 5:
the embodiment provides a process method for sintering ferroboron concentrate, which comprises the following specific steps:
s1, preparing vanadium-titanium magnetite concentrate powder, ferroboron concentrate powder, iron concentrate powder, lime powder, dolomite, fuel and return fines as raw materials;
in the raw materials, vanadium-titanium magnetite concentrate powder accounts for 50%, ferroboron concentrate powder accounts for 20%, iron concentrate powder accounts for 10%, dolomite accounts for 8%, lime powder accounts for 10%, fuel accounts for 4.2%, and the balance is return fines;
s2, crushing the fuel, and wetting the return ores by adding water;
s3, adding water into all the raw materials, and mixing for 30min, wherein the added water accounts for 15% of the total weight of the raw materials;
s4, granulating the mixed raw materials, and adding water during granulation;
and S5, distributing the particle mixture through a distributing machine, and then performing ignition sintering to prepare the hot sinter.
In the step S2, the crushed granularity of the fuel is less than or equal to 2mm, and the part with the crushed granularity less than or equal to 2mm accounts for more than 85 percent of the total weight of the fuel.
In the step S4, the granulating temperature is 55 ℃, and the granulating time is 2-4 min; in the obtained granular mixture, the part with the grain diameter of 12mm accounts for more than 95 percent of the whole granular mixture.
In step S5, the height of the material layer of the cloth is 800mm, the ignition temperature is 1200 ℃, and the ignition time is 90S.
Further comprising the steps of:
and (3) crushing and screening the hot sintering ore while the hot sintering ore is hot until the granularity is less than or equal to 130mm, removing the part with the granularity less than 10mm by screening, and cooling the rest part with the granularity more than or equal to 5mm to be less than or equal to 130 ℃ to obtain the cold sintering ore.
The drum strength index of the cold-sintered ore is 70%, the reduction degradation index RDI +3.15 is 90%, and the reduction degree index is 80%.
Of ferroboron concentrate powdersIron grade TFe 60.0%, B2O310 percent, the granularity is less than or equal to 0.5mm, and the part with the granularity less than 0.08mm accounts for more than 85 percent of the total weight.
The amount of water added during the granulation in step S4 was 2% of the total weight of the raw materials.
Example 6:
the embodiment provides a process method for sintering ferroboron concentrate, which comprises the following specific steps:
s1, preparing vanadium-titanium magnetite concentrate powder, ferroboron concentrate powder, iron concentrate powder, lime powder, dolomite, fuel and return fines as raw materials;
in the raw materials, vanadium-titanium magnetite concentrate powder accounts for 45%, ferroboron concentrate powder accounts for 15%, iron concentrate powder accounts for 8%, dolomite accounts for 7%, lime powder accounts for 8%, fuel accounts for 4%, and the balance is return fines;
s2, crushing the fuel, and wetting the return ores by adding water;
s3, adding water into all the raw materials, and mixing for 30min, wherein the added water accounts for 15% of the total weight of the raw materials;
s4, granulating the mixed raw materials, and adding water during granulation;
and S5, distributing the particle mixture through a distributing machine, and then performing ignition sintering to prepare the hot sinter.
In the step S2, the crushed granularity of the fuel is less than or equal to 2mm, and the part with the crushed granularity less than or equal to 2mm accounts for more than 85 percent of the total weight of the fuel.
In the step S4, the granulating temperature is 55 ℃, and the granulating time is 2-4 min; in the obtained granular mixture, the part with the grain diameter of 12mm accounts for more than 95 percent of the whole granular mixture.
In step S5, the height of the material layer of the cloth is 800mm, the ignition temperature is 1200 ℃, and the ignition time is 90S.
Further comprising the steps of:
and (3) crushing and screening the hot sintering ore while the hot sintering ore is hot until the granularity is less than or equal to 130mm, removing the part with the granularity less than 10mm by screening, and cooling the rest part with the granularity more than or equal to 5mm to be less than or equal to 130 ℃ to obtain the cold sintering ore.
The drum strength index of the cold-sintered ore is 70%, the reduction degradation index RDI +3.15 is 90%, and the reduction degree index is 80%.
The iron grade TFe of the ferroboron concentrate powder is 60.0 percent, and B2O310 percent, the granularity is less than or equal to 0.5mm, and the part with the granularity less than 0.08mm accounts for more than 85 percent of the total weight.
The amount of water added during the granulation in step S4 was 2% of the total weight of the raw materials.
Table 1 shows the results of comparing the specific gravities of the finished products produced by sintering ferroboron concentrates used in examples 1-6 as follows:
TABLE 1
From the experimental data in table 1 it is clear that the product sintered by the process of the invention has the advantage of high conversion, and from table 1 it is clear that example 6 is the most preferred choice.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (8)
1. A process method for sintering ferroboron concentrate comprises the following specific steps:
(S1) preparing vanadium-titanium magnetite concentrate powder, ferroboron concentrate powder, iron concentrate powder, lime powder, dolomite, fuel and return fines as raw materials;
in the raw materials, vanadium-titanium magnetite concentrate powder accounts for 40-50%, ferroboron concentrate powder accounts for 10-20%, iron concentrate powder accounts for 5-10%, dolomite accounts for 5-8%, lime powder accounts for 5-10%, fuel accounts for 3-4.2%, and the balance is return fines;
(S2), crushing the fuel, and wetting the return ores by water;
(S3) adding water into all the raw materials, and mixing for 20-30min, wherein the added water accounts for 10-15% of the total weight of the raw materials;
(S4), granulating the mixed raw materials, and adding water while granulating;
(S5) distributing the particle mixture through a distributing machine, and then carrying out ignition sintering to prepare the hot sinter.
2. A process of using ferroboron concentrate for sintering as claimed in claim 1 wherein: in the step (S2), the crushed granularity of the fuel is less than or equal to 2mm, and the part with the crushed granularity less than or equal to 2mm accounts for more than 85 percent of the total weight of the fuel.
3. A process of using ferroboron concentrate for sintering as claimed in claim 1 wherein: in the step (S4), the granulating temperature is 50-55 ℃, and the granulating time is 2-4 min; in the obtained granular mixture, the part with the grain diameter of 12mm accounts for more than 95 percent of the whole granular mixture.
4. A process of using ferroboron concentrate for sintering as claimed in claim 1 wherein: the height of the material layer distributed in the step (S5) is 800mm, the ignition temperature is 1100-1200 ℃, and the ignition time is 70-90S.
5. A process of using ferroboron concentrate for sintering as claimed in claim 1 wherein: further comprising the steps of:
and (3) crushing and screening the hot sintering ore while the hot sintering ore is hot until the granularity is less than or equal to 130mm, removing the part with the granularity less than 10mm by screening, and cooling the rest part with the granularity more than or equal to 5mm to be less than or equal to 130 ℃ to obtain the cold sintering ore.
6. A process according to claim 5, wherein the ferroboron concentrate is used in sintering, the process comprising: the drum strength index of the cold sintering ore is 65-70%, the reduction degradation index (RDI +3.15) is 85-90%, and the reduction degree index is 70-80%.
7. A process of using ferroboron concentrate for sintering as claimed in claim 1 wherein: the iron grade TFe of the ferroboron concentrate powder is 50.0-60.0 percent, and B2O33-10%, the granularity is less than or equal to 0.5mm, and the part with the granularity less than 0.08mm accounts for more than 85% of the total weight.
8. A process of using ferroboron concentrate for sintering as claimed in claim 1 wherein: the amount of water added in the granulation process in the step (S4) is 1-3% of the total weight of the raw materials.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177279A (en) * | 2015-08-21 | 2015-12-23 | 东北大学 | Method for improving quality of high-chromium vanadium and titanium sinter |
| CN107267749A (en) * | 2017-06-29 | 2017-10-20 | 东北大学 | The method that the high vanadium vanadium titanium magnet ore concentrate mix containing chromium type of high-grade prepares sintering deposit |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177279A (en) * | 2015-08-21 | 2015-12-23 | 东北大学 | Method for improving quality of high-chromium vanadium and titanium sinter |
| CN107267749A (en) * | 2017-06-29 | 2017-10-20 | 东北大学 | The method that the high vanadium vanadium titanium magnet ore concentrate mix containing chromium type of high-grade prepares sintering deposit |
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Application publication date: 20211105 |
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