CN109338125A - A method of silicochromium is prepared using diamond wire sliced crystal scrap silicon - Google Patents
A method of silicochromium is prepared using diamond wire sliced crystal scrap silicon Download PDFInfo
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- CN109338125A CN109338125A CN201811155538.4A CN201811155538A CN109338125A CN 109338125 A CN109338125 A CN 109338125A CN 201811155538 A CN201811155538 A CN 201811155538A CN 109338125 A CN109338125 A CN 109338125A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C28/00—Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
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Abstract
The present invention provides a kind of methods for preparing silicochromium using diamond wire sliced crystal scrap silicon, include the following steps: by mass percentage, by the crystalline silicon cutting waste material of 25-35wt%, the sodium bentonite of 1-3wt%, the modified water glass of 5-10wt%, the fine chrome mine of 20-30wt% and the water mixing of 30-40wt%, are then pressed into the pellet of diameter 20-50mm；Pellet is dehydrated under the conditions of 60-90 DEG C, until pellet weight is no longer changed；The pellet of dehydration is removed into organic matter, and the organic matter of abjection is decomposed, decomposition product is discharged into atmosphere after spray column absorbs；The pellet for removing organic matter is sintered in closed container；Sintered pellet is subjected to melting, casting of skimming, detects alloying component.A kind of method preparing silicochromium using diamond wire sliced crystal scrap silicon provided by the invention, production safety, environmentally protective and process be simple, high production efficiency.
Description
Technical field
It is the present invention relates to metallurgical technology field, in particular to a kind of to prepare silicochromium conjunction using diamond wire sliced crystal scrap silicon
The method of gold.
Background technique
Buddha's warrior attendant wire cutting has become the major way of silicon ingot cutting at present, cuts generated waste material silicone content and generally exists
85% or more, there is high recovery value.The silicide of silicochromium system ferrochrome is the ferrochrome containing enough silicon amounts.Silicochromium
The smelting process of alloy has one-step method and two-step method, and one-step method is called slagprocess, is by chrome ore, silica, coke etc. in submerged arc
Silicon chromium is directly smelt in electric reduction furnace；Two step method is called slagless process, by high carbon ferro-chrome well prepared in advance, silica, coke
Charcoal and steel cuttings by a certain percentage ingredient in electric furnace smelting.One-step method reducing agent amount of allocating is accurate, it influences electrode insertion depth
And in-furnace temperature, alloying component is had an effect on, the quantity of slag is big, and chromium is lost in more in slag.Two step method needs previously prepared high carbon ferro-chrome, increases
Production cost is added.For the above method compared with preparing chromium system ferroalloy using crystalline silicon cutting waste material, energy consumption is all higher.
Currently, it is less using the research that diamond wire cutting waste material prepares chromium alloy, and utilize diamond dust cutting waste material system
Standby chromium system ferroalloy has corresponding technical application, and method is with diamond dust sliced crystal scrap silicon by chromogen miberal powder by certain
Ratio mixes pelletizing molding, and flux is quick lime, induction furnace or arc melting obtain in, low-carbon ferrochromium alloy；It again will be above-mentioned
Alloy and forsterite or silica, coke mix by a certain percentage is packed into electric furnace smelting, and casting obtains low-carbon ferrochromium alloy.
But the method for preparing chromium system ferroalloy using crystalline silicon cutting waste material, not only there is be directly added into powder to lead to silicon
The lower problem of utilization rate.Moreover, not considering dehydration during by fine chrome mine and cutting waste material mixed-forming
Hydrogen can be generated to be unfavorable for keeping the safety in production, and do not consider organic matter removing and processing and be easy pollution environment.Meanwhile it preparing
Easily hydrogen is released with pasc reaction under water effect as flux using basic anhydride calcium oxide during high carbon ferro-chrome to be also unfavorable for
Safety in production, and smelting process is divided into two steps, and process is tedious, increases production cost.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of production safety, environmentally protective and process is simple, produces effect
The high method for preparing silicochromium using diamond wire sliced crystal scrap silicon of rate.
In order to solve the above technical problems, preparing silicochromium conjunction using diamond wire sliced crystal scrap silicon the present invention provides a kind of
The method of gold, includes the following steps:
By mass percentage, by the crystalline silicon cutting waste material of 25-35wt%, the sodium bentonite of 1-3wt%, 5-
The modified water glass of 10wt%, the fine chrome mine of 20-30wt% and the water mixing of 30-40wt%, are then pressed into diameter 20-50mm
Pellet；
Pellet is dehydrated under the conditions of 60-90 DEG C, until pellet weight is no longer changed；
The pellet of dehydration is removed into organic matter, and the organic matter of abjection is decomposed, decomposition product absorbs heel row through spray column
Enter atmosphere；
The pellet for removing organic matter is sintered in closed container；
Sintered pellet is subjected to melting, casting of skimming, detects alloying component.
Further, the dewatering time of the pellet is 5-20h.
Further, the pellet removing organic matter is to remove organic matter under the conditions of 200-350 DEG C, removes organic matter
Time is 1-5h.
Further, the crystalline silicon cutting waste material carries out break process in advance, and broken crystalline silicon cutting waste material has
90% or more grain graininess is less than 100 μm.
Further, the pellet is pressed into the pellet that diameter is 20-50mm.
Further, the fine chrome mine includes Cr2O341.28wt%, FeO13.02wt%, SiO26.71wt%, Al2O3
19.74wt%, MgO 18.36wt%, other impurity 0.89wt%.
Further, the organic matter decomposition of the abjection is that organic matter enters burning decomposition in decomposition kiln.
Further, the temperature that the pellet is sintered in closed container is 350-550 DEG C, sintering time 5-15h.
Further, the pellet melting is that melting is carried out in induction furnace, and pellet smelting temperature is 1450-1650 DEG C.
A kind of method preparing silicochromium using diamond wire sliced crystal scrap silicon provided by the invention, due to not introducing
Or the carbon source amount introduced is negligible, therefore reaction process may not necessarily remove carbon, reaction can a step complete, process is simple, mentions
High high production efficiency, reduces production cost.Also, the dehydration of pellet is dehydrated using low-temperature zone in production process, is avoided
Or hydrogen generation is greatly reduced, it ensure that the safety of production.Meanwhile utilization diamond wire sliced crystal provided by the invention
The method that scrap silicon prepares silicochromium has carried out the removing of organic matter to pellet, the organic matter of abjection is carried out burning decomposition
Processing, and it is discharged into atmosphere again after spray column elutes by the flue gas generated is decomposed, avoid water base used in crystalline silicon cutting cut
The elements such as N, P, S that liquid remains in sliced crystal scrap silicon are cut, acid waste gas is generated in production sintering and causes acid rain, subtract
Pollution environment is lacked.
Detailed description of the invention
Fig. 1 is the work of the method provided in an embodiment of the present invention that silicochromium is prepared using diamond wire sliced crystal scrap silicon
Skill flow chart.
Specific embodiment
It is provided in an embodiment of the present invention a kind of to prepare silicochromium using diamond wire sliced crystal scrap silicon referring to Fig. 1
Method includes the following steps:
Step 1: by mass percentage, by the crystalline silicon cutting waste material of 25-35wt%, the sodium bentonite of 1-3wt%,
The modified water glass of 5-10wt%, the fine chrome mine of 20-30wt% and the water mixing of 30-40wt%, are then pressed into diameter 20-
The pellet of 50mm；Wherein, the crystalline silicon cutting waste material carries out break process in advance, makes in broken crystalline silicon cutting waste material
There is 90% or more grain graininess less than 100 μm, the fine chrome mine includes Cr2O341.28wt%, FeO13.02wt%, SiO2
6.71wt%, Al2O319.74wt%, MgO 18.36wt%, other impurity 0.89wt%.
Step 2: pellet being placed in tunnel oven or mesh belt dryer, is dehydrated under the conditions of 60-90 DEG C, and will dehydration
Time controls in 5-20h, until pellet weight is no longer changed.
Step 3: dewatered pellet being placed in tunnel oven, organic matter is removed under conditions of 200-350 DEG C, and will take off
Except the time of organic matter controls in 1-5h.The organic matter of abjection is passed through to decompose to burn in kiln and is decomposed, generation then will be decomposed
Flue gas is discharged into atmosphere after spray column absorbs again, and organic matter is avoided to burn the pernicious gas pollution air generated.
Step 4: the pellet for removing organic matter being sintered in closed container, sintering temperature controls the sintering at 350-550 DEG C
Time control is 5-15h.
Step 5: sintered pellet being subjected to melting in induction furnace, smelting temperature control is 1450-1650 DEG C, then
Casting of skimming is carried out, finally obtained alloying component is smelted in detection.
Below by specific embodiment a kind of silicochromium is prepared using diamond wire sliced crystal scrap silicon to provided by the invention
The method of alloy illustrates.
Embodiment 1
A method of silicochromium being prepared using diamond wire sliced crystal scrap silicon, is included the following steps:
(1) crystalline silicon cutting waste material is subjected to break process, the granularity of 90% or more particle is less than 100 μm after being crushed.Sodium
0.3 kilogram of base bentonite dosage, 0.8 kilogram of modified water glass dosage, 2.5 kilograms of fine chrome mine, crystalline silicon cutting waste material 2.9 is public
Jin, carries out mixing according to said ratio, the ball of diameter 25mm is pressed into high pressure roller press by 3.5 kilograms of water.
(2) ball is placed in tunnel oven, is dehydrated under the conditions of 70 DEG C, dewatering time 12h, until the weight of wet bulb is not
It changes again.
(3) by ball in tunnel oven, organic matter is removed under the conditions of 300 DEG C, takes off organic matter time 1h, the organic matter of abjection
It is decomposed into kiln is decomposed, finally flows through spray column and be discharged into atmosphere.
(4) ball for having taken off organic matter is packed into closed container.It is sintered under the conditions of 400 DEG C, sintering time 8h.
(5) induction furnace is packed into 1500 DEG C of meltings, is carried out casting of skimming, is detected alloying component S i55.12%, Cr
28.23%, other component 16.65wt%.
Embodiment 2
A method of silicochromium being prepared using diamond wire sliced crystal scrap silicon, is included the following steps:
(1) crystalline silicon cutting waste material is subjected to break process, the granularity of 90% or more particle is less than 100 μm after being crushed.Sodium
0.2 kilogram of base bentonite dosage, 0.9 kilogram of modified water glass dosage, 2.5 kilograms of fine chrome mine, crystalline silicon cutting waste material 2.6 is public
Jin, carries out mixing according to said ratio, the ball of diameter 40mm is pressed into high pressure roller press by 3.8 kilograms of water.
(2) ball is placed in mesh belt air-dry machine, is dehydrated under the conditions of 70 DEG C, dewatering time 12h, until the weight of wet bulb
Amount is no longer changed.
(3) ball is placed in tunnel oven, removes organic matter under the conditions of 300 DEG C, take off organic matter time 1h, abjection it is organic
Object, which enters, decomposes kiln decomposition, finally flows through spray column and is discharged into atmosphere.
(4) ball for having taken off organic matter is packed into closed container.It is sintered under the conditions of 450 DEG C, sintering time 8h.
(5) induction furnace is packed into 1550 DEG C of meltings, is carried out casting of skimming, is detected alloying component S i52.12%, Cr
30.97%, C 0.02%, other contents meet national standard trade mark FeCr30Si 40-B.
Embodiment 3
A method of silicochromium being prepared using diamond wire sliced crystal scrap silicon, is included the following steps:
(1) crystalline silicon cutting waste material is subjected to break process, the granularity of 90% or more particle is less than 100 μm after being crushed.Sodium
0.3 kilogram of base bentonite dosage, 0.8 kilogram of modified water glass dosage, 2.6 kilograms of fine chrome mine, crystalline silicon cutting waste material 2.5 is public
Jin, carries out mixing according to said ratio, the ball of diameter 25mm is pressed into high pressure roller press by 3.8 kilograms of water.
(2) ball is placed in tunnel oven, is dehydrated under the conditions of 70 DEG C, dewatering time 12h, until the weight of wet bulb is not
It changes again.
(3) ball is placed in tunnel oven, removes organic matter under the conditions of 300 DEG C, take off organic matter time 1h, abjection it is organic
Object, which enters, decomposes kiln decomposition, finally flows through spray column and is discharged into atmosphere.
(4) ball for having taken off organic matter is packed into closed container.It is sintered under the conditions of 400 DEG C, sintering time 8h.
(5) induction furnace is packed into 1550 DEG C of meltings, is carried out casting of skimming, is detected alloying component Si50.02%, Cr
33.75%, C 0.03%, other contents meet national standard trade mark FeCr30Si40-C.
Embodiment 4
A method of silicochromium being prepared using diamond wire sliced crystal scrap silicon, is included the following steps:
(1) crystalline silicon cutting waste material is subjected to break process, the granularity of 90% or more particle is less than 100 μm after being crushed.Sodium
0.3 kilogram of base bentonite dosage, 0.7 kilogram of modified water glass dosage, 2.9 kilograms of fine chrome mine, crystalline silicon cutting waste material 2.3 is public
Jin, carries out mixing according to said ratio, the ball of diameter 25mm is pressed into high pressure roller press by 3.8 kilograms of water.
(2) ball is placed in mesh belt air-dry machine, is dehydrated under the conditions of 80 DEG C, dewatering time 10h, until the weight of wet bulb
Amount is no longer changed.
(3) ball is placed in tunnel oven, removes organic matter under the conditions of 350 DEG C, take off organic matter time 1h, abjection it is organic
Object, which enters, decomposes kiln decomposition, finally flows through spray column and is discharged into atmosphere.
(4) ball for having taken off organic matter is packed into closed container.It is sintered under the conditions of 500 DEG C, sintering time 8h.
(5) induction furnace is packed into 1650 DEG C of meltings, is carried out casting of skimming, is detected alloying component Si47.69%, Cr
31.88%, C 0.03%, other contents meet national standard trade mark FeCr30Si40-C.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (9)
1. a kind of method for preparing silicochromium using diamond wire sliced crystal scrap silicon, which comprises the steps of:
By mass percentage, by the crystalline silicon cutting waste material of 25-35wt%, the sodium bentonite of 1-3wt%, 5-10wt%'s
Modified water glass, the fine chrome mine of 20-30wt% and the water mixing of 30-40wt%, are then pressed into pellet；
Pellet is dehydrated under the conditions of 60-90 DEG C, until pellet weight is no longer changed；
The pellet of dehydration is removed into organic matter, and the organic matter of abjection is decomposed, decomposition product is discharged into greatly after spray column absorbs
Gas；
The pellet for removing organic matter is sintered in closed container；
Sintered pellet is subjected to melting, casting of skimming, detects alloying component.
2. the method according to claim 1 for preparing silicochromium using diamond wire sliced crystal scrap silicon, feature exist
In: the dewatering time of the pellet is 5-20h.
3. the method according to claim 1 for preparing silicochromium using diamond wire sliced crystal scrap silicon, feature exist
In: the pellet removing organic matter is to remove organic matter under the conditions of 200-350 DEG C, and the time for removing organic matter is 1-5h.
4. the method according to claim 1 for preparing silicochromium using diamond wire sliced crystal scrap silicon, feature exist
In: the crystalline silicon cutting waste material carries out break process in advance, and broken crystalline silicon cutting waste material has 90% or more particle
Granularity is less than 100 μm.
5. the method according to claim 1 for preparing silicochromium using diamond wire sliced crystal scrap silicon, feature exist
In: the pellet is pressed into the pellet that diameter is 20-50mm.
6. the method according to claim 1 for preparing silicochromium using diamond wire sliced crystal scrap silicon, feature exist
In: the fine chrome mine includes Cr2O341.28wt%, FeO13.02wt%, S iO26.71wt%, Al2O319.74wt%, MgO
18.36wt%, other impurity 0.89wt%.
7. the method according to claim 1 for preparing silicochromium using diamond wire sliced crystal scrap silicon, feature exist
In: the organic matter decomposition of the abjection is that organic matter enters burning decomposition in decomposition kiln.
8. the method according to claim 1 for preparing silicochromium using diamond wire sliced crystal scrap silicon, feature exist
In: the temperature that the pellet is sintered in closed container is 350-550 DEG C, sintering time 5-15h.
9. the method according to claim 1 for preparing silicochromium using diamond wire sliced crystal scrap silicon, feature exist
In: the pellet melting is that melting is carried out in induction furnace, and pellet smelting temperature is 1450-1650 DEG C.
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| CN201811155538.4A CN109338125A (en) | 2018-09-30 | 2018-09-30 | A method of silicochromium is prepared using diamond wire sliced crystal scrap silicon |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109988929A (en) * | 2019-04-18 | 2019-07-09 | 东北大学 | A method of alusil alloy is prepared with photovoltaic cutting waste material |
| CN109988928A (en) * | 2019-04-18 | 2019-07-09 | 东北大学 | A kind of silicon material and preparation method prepared with photovoltaic cutting waste material |
| CN112267035A (en) * | 2020-09-29 | 2021-01-26 | 江苏美科太阳能科技有限公司 | Method for preparing manganese-silicon alloy by utilizing crystalline silicon diamond wire cutting waste |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105603291A (en) * | 2016-02-01 | 2016-05-25 | 四川川投峨眉铁合金（集团）有限责任公司 | Production method for smelting silicochrome by recycling crystalline silicon cut waste powder |
| CN107699685A (en) * | 2017-08-09 | 2018-02-16 | 江苏省冶金设计院有限公司 | A kind of production method of silicochromium |
-
2018
- 2018-09-30 CN CN201811155538.4A patent/CN109338125A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105603291A (en) * | 2016-02-01 | 2016-05-25 | 四川川投峨眉铁合金（集团）有限责任公司 | Production method for smelting silicochrome by recycling crystalline silicon cut waste powder |
| CN107699685A (en) * | 2017-08-09 | 2018-02-16 | 江苏省冶金设计院有限公司 | A kind of production method of silicochromium |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109988929A (en) * | 2019-04-18 | 2019-07-09 | 东北大学 | A method of alusil alloy is prepared with photovoltaic cutting waste material |
| CN109988928A (en) * | 2019-04-18 | 2019-07-09 | 东北大学 | A kind of silicon material and preparation method prepared with photovoltaic cutting waste material |
| CN112267035A (en) * | 2020-09-29 | 2021-01-26 | 江苏美科太阳能科技有限公司 | Method for preparing manganese-silicon alloy by utilizing crystalline silicon diamond wire cutting waste |
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