CN107699685A - A kind of production method of silicochromium - Google Patents
A kind of production method of silicochromium Download PDFInfo
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- CN107699685A CN107699685A CN201710674357.1A CN201710674357A CN107699685A CN 107699685 A CN107699685 A CN 107699685A CN 201710674357 A CN201710674357 A CN 201710674357A CN 107699685 A CN107699685 A CN 107699685A
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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
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
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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
- C22B1/02—Roasting processes
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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
- C22B1/242—Binding; Briquetting ; Granulating with binders
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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
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
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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
- C22B34/00—Obtaining refractory metals
- C22B34/30—Obtaining chromium, molybdenum or tungsten
- C22B34/32—Obtaining chromium
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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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
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Abstract
The invention discloses a kind of production method of silicochromium, it is comprised the following steps that：By chromogen miberal powder, Cab-O-sil, reducing agent powder, add binding agent and water is mixed, obtain compound；Then pressure ball or pelletizing processing are carried out to compound makes the compound be molded to obtain shaping pelletizing；The shaping pelletizing is dried to obtain and dries pelletizing；The dry pelletizing is subjected to reduction roasting and obtains agglomerates；The agglomerates and coke are added together deep reduction is carried out in electric furnace, obtain silicochromium.The production method of the silicochromium of the present invention, which realizes, directly utilizes chromogen miberal powder production silicochromium, reduce the operating technology difficulty of silicochromium smelting, compared with the two step method (high carbon ferro-chrome silicochromium) of traditional silicochromium, the power consumption 4%~14% that ton silicochromium is smelted is reduced, improves the chromium recovery ratio 5%~8% of silicochromium smelting.
Description
Technical field
The present invention relates to ferroalloy field, more particularly to a kind of production method of silicon chromium.
Background technology
Silicochromium be electro silicothermic process production in, the indispensable reducing agent of low ＆ micro carbon ferrochromium.Produce the side of silicochromium
Method has two kinds：One-step method (slagprocess) and two step method (slagless process).One-step method is by the chrome ore of lump ore or pelletizing shape, silica and Jiao
Charcoal, which is directly added into an electric furnace, to be smelted.The first step of two step method is to add chrome ore and coke in First electric furnace, smelting
High carbon ferro-chrome is produced, high carbon chromium iron block is added in another electric furnace and carries out smelting silicochromium conjunction by second step together with silica, coke
Gold.At present, China is in the industrial production mainly using two step method.This is primarily due to compared to one-step method, two step method
Operating technology is simple, is easily mastered, and ton product power consumption is relatively low (about 7200kWh), but this method process is more, and high carbon ferro-chrome is through broken
It is lost greatly after broken, transport, storage, causes the rate of recovery of chromium metal low (about 87%), deficiency in economic performance.
And the characteristics of one-step method is that technological process is short, the rate of recovery of metal is high, good in economic efficiency.Therefore in Sweden, Germany
Some ferroalloy enterprises use One-step production silicochromium, but it requires that into stove chrome ore must be lump ore or pellet, right
Chrome ore and silica, the requirement of coke equigranular are strictly.The chrome ore main source import in China, fine ore account for 70% in import chrome ore
More than, lump ore only accounts for 30% or so, and the lump ore of not all granularity is all suitable for, and is limited by material condition, causes China
The industrialized production of One-step production silicochromium can not be realized always.
The content of the invention
The technical problems to be solved by the invention are to propose a kind of method for producing silicochromium, use the step of chromium powder ore one
Smelting operation technical difficulty and power consumption are reduced while method smelts silicochromium and increases chromium metal recovery rate, improves economic effect
Benefit.
For this invention discloses a kind of method for producing silicochromium, comprise the following steps：
S1, by chromogen miberal powder, Cab-O-sil, reducing agent powder, add binding agent and water mixed, obtain compound；
S2 and then pressure ball or pelletizing processing are carried out to compound makes the compound be molded to obtain shaping pelletizing；
S3, the shaping pelletizing is dried to obtain and dries pelletizing；
S4, the dry pelletizing is subjected to reduction roasting obtains agglomerates；
S5, the coke of the agglomerates sum is added together deep reduction is carried out in electric furnace, obtain silicochromium.
Further, the granularity of each powder is less than 1mm in the compound, wherein,
When being molded using pelletizing mode, it is desirable to which wherein granularity accounts for more than 85% less than 0.074mm, when using pressure ball mode
During balling-up, then require that wherein granularity accounts for more than 95% less than 1mm.
Further, the shaping pelletizing particle diameter is 8~30mm, preferably 10-20mm, and particle diameter is too small, furnace charge air permeability
Difference, it is unfavorable for electric furnace production, particle diameter is excessive, and reduction roasting difficulty is big, easily occurs reducing halfway situation.
Further, the chromogen miberal powder requires that the ratio of chromium content and iron content is not less than 1.30, and preferred scope is
1.4~2.0, content of MgO and Al2O3The mass values of content are not less than 1, and preferred scope is 1.2~1.8.The side with ore deposit can be used
Formula obtains satisfactory chromogen miberal powder.Thereby guarantee that the chromium content of gained silicochromium product is up to standard, advantageously reduce simultaneously
Slag melting, ensure that slag fluidity is good during electric furnace smelting, easily slags tap, reduce operating technology difficulty.
Further, the Cab-O-sil weight is 50% to the 120% of chromogen miberal powder weight, preferred scope 100%
~120%, (100% is free of), it is necessary in electric furnace smelting stage volume when Cab-O-sil weight is the 50%~100% of chromogen miberal powder
0%~40% silica (being free of 0%) is added outside, adjusts the silicone content in slag system and guarantee alloy product.When the weight of Cab-O-sil
Amount accounts for fine chrome mine 100%~120% (containing 100%), then need not add silica in the electric furnace smelting stage.Silicon is added in compound
Stone, it reacts in reduction roasting stage, meeting with the FeO in chromogen miberal powder, forms 2FeOSiO2And FeOSiO2, 2FeO
SiO2The intensity of pelletizing after raising roasting, its pressure resistance into semi-molten state or liquid phase, can be advantageous at a temperature of reduction roasting
Degree can be more than 1000N, can meet that electric furnace produces the requirement to furnace charge intensity completely.In addition, 2FeOSiO2And FeOSiO2
The initial reaction temperature for generating Si or SiC is reacted between 1160 DEG C~1420 DEG C with carbon, far below pure SiO2Reacted with carbon
Initial reaction temperature (1550 DEG C~1680 DEG C), therefore at reduction roasting stage (1350 DEG C~1400 DEG C), when supplying is enough
Carbonaceous reducing agent when, also have a small amount of SiO2It is reduced, therefore electric furnace production silicochromium is carried out using pelletizing after the roasting
During alloy, smelting temperature can decrease, and so as to reduce melting electric consumption, compared to two-step process, can reduce a ton alloy smelting
Refine power consumption 4%~14%.
Further, dolomite dust is also included in the compound, the dolomite dust weight accounts for chromogen miberal powder weight
0%~20% (dolomite is non-essential), its object is to improve content of MgO and Al in compound2O3The ratio of content,
Reduce content of MgO and Al2O3The usage amount of the high and expensive chromogen miberal powder of the ratio of content, in addition, dolomite is in reduction roasting rank
Section can decompose, and produce CO2Gas, increase the porosity of pelletizing, be advantageous to the degree of metalization of pelletizing after increase reduction roasting,
Comprehensive degree of metalization 2%~9% can be improved.
More specifically, the reducing agent powder is one kind in the carbonaceous reducing agents such as coke, semi-coke, anthracite, match somebody with somebody reduction
The integral molar quantity of the fixed carbon of agent powder is the 1.6-2.0 of the integral molar quantity of oxygen in ferriferous oxide and chromated oxide in chromogen miberal powder
Times, preferred scope is 1.6-1.8 times, the very few reduction for being unfavorable for silicon, can excessively reduce the intensity of pelletizing after shaping, cause to reduce
Roasting effect is deteriorated.
Further, the binding agent is bentonite or the mixture of bentonite and starch, the addition of the binding agent
Measure as the 3%~8% of chromogen miberal powder weight.
Further, the addition of coke described in step S5 is the 15%~25% of the chromogen miberal powder weight.
Further, the drying temperature is 100-150 DEG C, and the reduction roasting temperature is 1350 DEG C~1400 DEG C.
Using the agglomerates of said ratio production gained, when carrying out electric furnace smelting, the SiO in clinker can be caused2Contain
Amount is between 45%~60%, content of MgO and Al2O3For the ratio of content between 1~1.5, the fusing point of the slag system is relatively low,
Just there is good mobility under 1600 DEG C~1700 DEG C smelting temperatures.
Further, step S2, the compound shaping in S3, S4, drying, reduction roasting process include transport and granularity
Process is sieved, without broken process, and the returning charge in compound shaping and the reducing roasting process can be sharp again
With the loss of material of the process is small, and its chromium recovery ratio is more than 92%, reaches the chromium recovery ratio level of one-step method, compared to two steps
Method produces silicochromium, and chromium recovery ratio improves 5%~8%.
The beneficial effects of the present invention are：
(1) realized by the shaping pelletizing of high intensity and directly produce silicochromium using chromogen miberal powder, reduce silicochromium
The operating technology difficulty of alloy smelting.
(2) compared with the two step method (high carbon ferro-chrome-silicochromium) of traditional silicochromium, reduce what ton silicochromium was smelted
Power consumption 4%~14%, improve the chromium recovery ratio 5%~8% of silicochromium smelting.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the schematic flow sheet for the method that silicochromium is produced in the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of embodiment is shown in the drawings, wherein identical from beginning to end
Or similar label represents same or similar element or the element with same or like function.Retouched below with reference to accompanying drawing
The embodiment stated is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
According to the accompanying drawing 1 of the present invention, a kind of method for producing silicochromium is shown, specifically includes following steps：
S1, by chromogen miberal powder, Cab-O-sil, reducing agent powder, add binding agent and water mixed, obtain compound；
S2 and then pressure ball or pelletizing processing are carried out to compound makes the compound be molded to obtain shaping pelletizing；
S3, the shaping pelletizing is dried to obtain and dries pelletizing；
S4, the dry pelletizing is subjected to reduction roasting obtains agglomerates；
S5, the agglomerates and coke are added together deep reduction is carried out in electric furnace, obtain silicochromium.
More specifically, the granularity of each powder is less than 1mm in the compound, when being molded using pelletizing mode, it is desirable to its
Middle granularity accounts for more than 85% less than 0.074mm, when using pressure ball mode balling-up, then requires that wherein granularity accounts for 95% less than 1mm
More than.
More specifically, the shaping pelletizing particle diameter is 8~30mm, preferably 10-20mm, particle diameter is too small, and furnace charge air permeability is poor,
It is unfavorable for electric furnace production, particle diameter is excessive, and reduction roasting difficulty is big, easily occurs reducing halfway situation.
More specifically, the chromogen miberal powder requires that the ratio of chromium content and iron content is not less than 1.30 (in terms of mass parts),
Preferred scope is 1.4~2.0, content of MgO and Al2O3The ratio of content is not less than 1, and preferred scope is 1.2~1.8.It can use and match somebody with somebody
The mode of ore deposit obtains satisfactory chromogen miberal powder.Thereby guarantee that the chromium content of gained silicochromium product is up to standard, while favorably
In reducing slag melting, ensure that slag fluidity is good during electric furnace smelting, easily slags tap, reduce operating technology difficulty.
More specifically, the Cab-O-sil weight is 50% to the 120% of chromogen miberal powder weight, preferred scope is 100%~
120%, when Cab-O-sil weight is the 50%~100% of chromogen miberal powder, it is necessary to additionally add 0% in the electric furnace smelting stage~
40% silica, adjust the silicone content in slag system and guarantee alloy product.When the weight of Cab-O-sil account for fine chrome mine 100%~
120%, then it need not add silica in the electric furnace smelting stage.Silica is added in compound, it is in reduction roasting stage, meeting and chromium
FeO reactions in fine ore, form 2FeOSiO2And FeOSiO2, 2FeOSiO2Can be into fritting at a temperature of reduction roasting
Melt state or liquid phase, be advantageous to the intensity of pelletizing after raising roasting, its compression strength can be more than 1000N, can meet electricity completely
Stove produces the requirement to furnace charge intensity.In addition, 2FeOSiO2And FeOSiO2Generation Si or SiC initial action is reacted with carbon
Temperature is between 1160 DEG C~1420 DEG C, far below pure SiO2With the initial reaction temperature (1550 DEG C~1680 of carbon reaction
DEG C), therefore at reduction roasting stage (1350 DEG C~1400 DEG C), when being incorporated enough carbonaceous reducing agents, also have a small amount of
SiO2When being reduced, therefore carrying out electric furnace production silicochromium using pelletizing after the roasting, smelting temperature can decrease,
So as to reduce melting electric consumption, compared to two-step process, a ton alloy smelting power consumption 4%~14% can be reduced.
More specifically, the compound also includes dolomite dust, the dolomite dust weight accounts for the 0% of chromogen miberal powder weight
~20%, its object is to improve content of MgO and Al in compound2O3The ratio of content, reduce content of MgO and Al2O3Content
The usage amount of the high and expensive chromogen miberal powder of ratio, in addition, dolomite can decompose in the reduction roasting stage, produces CO2Gas
Body, increase the porosity of pelletizing, be advantageous to the degree of metalization of pelletizing after increase reduction roasting, comprehensive degree of metalization can be improved
2%~9%.
More specifically, the reducing agent powder is one kind in the carbonaceous reducing agents such as coke, semi-coke, anthracite, match somebody with somebody reduction
The integral molar quantity of the fixed carbon of agent powder is the 1.6-2.0 of the integral molar quantity of oxygen in ferriferous oxide and chromated oxide in chromogen miberal powder
Times, preferred scope is 1.6-1.8 times, the very few reduction for being unfavorable for silicon, can excessively reduce the intensity of pelletizing after shaping, cause to reduce
Roasting effect is deteriorated.
More specifically, the binding agent is bentonite or the mixture of bentonite and starch.The addition of the binding agent
For the 3%~8% of chromogen miberal powder weight.
More specifically, the addition of coke described in step S5 is the 15%~25% of the chromogen miberal powder weight.
More specifically, the drying temperature is 100-150 DEG C, the reduction roasting temperature is 1350 DEG C~1400 DEG C.
Using the agglomerates of said ratio production gained, when carrying out electric furnace smelting, stove can be caused (in terms of mass parts)
SiO in slag2Content is between 45%~60%, content of MgO and Al2O3The ratio of content (in terms of mass parts) is between 1~1.5
Between, the fusing point of the slag system is relatively low, just has good mobility under 1600 DEG C~1700 DEG C smelting temperatures.
More specifically, the compound in step S2, S3, S4 is molded, dried, reduction roasting process need to only transport and grain
Degree screening process, without broken, and the returning charge in shaping and roasting process can reuse, the loss of material of the process
Small, its chromium recovery ratio is more than 92%, reaches the chromium recovery ratio level of one-step method, produces silicochromium compared to two step method, chromium returns
Yield improves 5%~8%.
Specific embodiment：
Embodiment 1：
Ferrochrome mass ratio is 1.40, MgO/Al2O3For 1.20 100 parts of chromogen miberal powder, 100 parts of Cab-O-sil, 27 parts of coke
(mole of total fixed carbon be in chromogen miberal powder 1.6 times of the mole of oxygen in ferriferous oxide and chromated oxide), dolomite 15
Part, 2.5 parts of bentonite, 0.5 part of starch, 10 parts of water are mixed in batch mixer, and pelletizing is carried out after mixing, and spherolite degree is 8~12mm,
Gained wet bulb is dried at 100-150 DEG C or so, and pelletizing carries out reduction roasting after drying, and reduction roasting temperature is 1350 DEG C, roasting
The synthesis degree of metalization about 55% of pelletizing afterwards, pelletizing compression strength about 1500N/ balls after roasting.100 parts of pelletizing after being calcined, with
18.5 parts of coke is put into electric furnace together to be smelted, and chromium content 31.30% is can obtain after smelting, silicone content 40.23%
Silicochromium, compared with traditional handicraft, melting electric consumption reduces 8.7%, chromium recovery ratio 92.1%, improves 5.1%.
Embodiment 2：
Ferrochrome mass ratio is 1.88, MgO/Al2O3For 1.41 100 parts of chromogen miberal powder, 120 parts of Cab-O-sil, 30 parts of coke
(mole of total fixed carbon be in chromogen miberal powder 1.8 times of the mole of oxygen in ferriferous oxide and chromated oxide), dolomite 10
Part, 8 parts of bentonite, 10 parts of water mixes in batch mixer, pressure ball is carried out after mixing, spherolite degree is 10~20mm, and gained wet bulb exists
100-150 DEG C or so drying, pelletizing carries out reduction roasting after drying, and reduction roasting temperature is 1400 DEG C, and pelletizing is comprehensive after roasting
Close degree of metalization about 70%, pelletizing compression strength about 1400N/ balls after roasting.100 parts of pelletizing after being calcined, the coke with 17 parts
It is put into electric furnace and is smelted together, chromium content 34.25% is can obtain after smelting, the silicochromium of silicone content 47.21%, is relatively passed
System technique, melting electric consumption reduce 11.5%, chromium recovery ratio 93.9%, improve 6.9%.
Embodiment 3：
Ferrochrome mass ratio is 2.00, MgO/Al2O3For 1.80 100 parts of chromogen miberal powder, 100 parts of Cab-O-sil, 45 parts of semi-coke
(mole of total fixed carbon be in chromogen miberal powder 2.0 times of the mole of oxygen in ferriferous oxide and chromated oxide), bentonite 6
Part, 2 parts of starch, 10 parts of water mixes in batch mixer, pressure ball is carried out after mixing, spherolite degree is 20~30mm, and gained wet bulb exists
100-150 DEG C or so drying, pelletizing carries out reduction roasting after drying, and reduction roasting temperature is 1400 DEG C, and pelletizing is comprehensive after roasting
Close degree of metalization about 85%, pelletizing compression strength about 1500N/ balls after roasting.100 parts of pelletizing after being calcined, the coke with 15 parts
It is put into electric furnace and is smelted together, chromium content 36.38% is can obtain after smelting, the silicochromium of silicone content 42.94%, is relatively passed
System technique, melting electric consumption reduce 13.9%, chromium recovery ratio 94.9%, improve 7.9%.
Embodiment 4：
Ferrochrome mass ratio is 1.30, MgO/Al2O3For 1.00 100 parts of chromogen miberal powder, 50 parts of Cab-O-sil, 27 parts of anthracite
(mole of total fixed carbon be in chromogen miberal powder 1.6 times of the mole of oxygen in ferriferous oxide and chromated oxide), dolomite 20
Part, 3 parts of bentonite, 10 parts of water mixes in batch mixer, pelletizing is carried out after mixing, spherolite degree is 8~12mm, and gained wet bulb exists
100-150 DEG C or so drying, pelletizing carries out reduction roasting after drying, and reduction roasting temperature is 1350 DEG C, and pelletizing is comprehensive after roasting
Close degree of metalization about 45%, pelletizing compression strength about 1000N/ balls after roasting.Will 100 parts of pelletizing after roasting, coke with 25 parts,
40 parts of silicas are put into electric furnace are smelted together, and chromium content 32.29%, the silicochromium of silicone content 41.48% are can obtain after smelting
Alloy, compared with traditional handicraft, melting electric consumption reduces 4.2%, chromium recovery ratio 92%, improves 5%.
Embodiment 5：
Ferrochrome mass ratio is 1.70, MgO/Al2O3It is (total for 1.62 100 parts of chromogen miberal powder, 80 parts of Cab-O-sil, 28 parts of coke
The mole of fixed carbon is in chromogen miberal powder 1.7 times of the mole of oxygen in ferriferous oxide and chromated oxide), 5 parts of dolomite is swollen
7 parts of profit soil, 10 parts of water is mixed in batch mixer, and pressure ball is carried out after mixing, and spherolite degree is 10~20mm, and gained wet bulb is in 100-
150 DEG C or so drying, pelletizing carries out reduction roasting after drying, and reduction roasting temperature is 1400 DEG C, the comprehensive gold of pelletizing after roasting
Belong to rate about 65%, pelletizing compression strength about 1400N/ balls after roasting.Will 100 parts of pelletizing after roasting, coke with 20 parts, 20 parts
Silica is put into electric furnace together to be smelted, and can obtain chromium content 33.19% after smelting, the silicochromium of silicone content 43.67%,
Compared with traditional handicraft, melting electric consumption reduces 10.3%, chromium recovery ratio 92.9%, improves 6.8%.
Embodiment 6：
Ferrochrome mass ratio is 1.70, MgO/Al2O3It is (total for 1.62 100 parts of chromogen miberal powder, 80 parts of Cab-O-sil, 28 parts of coke
The mole of fixed carbon is in chromogen miberal powder 1.7 times of the mole of oxygen in ferriferous oxide and chromated oxide), 4 parts of bentonite, form sediment
1.2 parts of powder, 10 parts of water are mixed in batch mixer, and pelletizing is carried out after mixing, and spherolite degree is 8~12mm, and gained wet bulb is in 100-150
DEG C or so drying, pelletizing carries out reduction roasting after drying, and reduction roasting temperature is 1375 DEG C, the comprehensive metallization of pelletizing after roasting
Rate about 60%, pelletizing compression strength about 1500N/ balls after roasting.100 parts of pelletizing after being calcined, is put into together with 20 parts of coke
Smelted in electric furnace, can obtain chromium content 33.26% after smelting, the silicochromium of silicone content 42.42%, compared with traditional handicraft,
Melting electric consumption reduces 9.8%, chromium recovery ratio 92.47%, improves 6.2%.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (10)
1. a kind of method for producing silicochromium, comprises the following steps：
S1, by chromogen miberal powder, Cab-O-sil, reducing agent powder, add binding agent and water mixed, obtain compound；
S2 and then pressure ball or pelletizing processing are carried out to compound makes the compound be molded to obtain shaping pelletizing；
S3, the shaping pelletizing is dried to obtain and dries pelletizing；
S4, the dry pelletizing is subjected to reduction roasting obtains agglomerates；
S5, the agglomerates and coke are added together deep reduction is carried out in electric furnace, obtain silicochromium.
2. the method for production silicochromium as claimed in claim 1, it is characterised in that obtain being molded ball when using pelletizing mode
During group, the granularity of each powder accounts for more than 85% less than 0.074mm in the compound；Obtain being molded pelletizing when using pressure ball mode
When, the granularity of each powder accounts for more than 95% less than 1mm in the compound.
3. the method for production silicochromium as claimed in claim 1, it is characterised in that the shaping pelletizing particle diameter is 8~
30mm。
4. the method for production silicochromium as claimed in claim 1, it is characterised in that the chromogen miberal powder require chromium content with
The mass values of iron content are not less than 1.30, content of MgO and Al2O3The mass values of content are not less than 1.
5. the method for production silicochromium as claimed in claim 1, it is characterised in that the Cab-O-sil weight accounts for the chromogen
Between the ratio of miberal powder weight is 50% to 120%, the ratio that the chromogen miberal powder weight is accounted for when the Cab-O-sil weight is
50% to no more than 100% when, it is necessary to more than 0% to 30% silica additionally be added in the electric furnace smelting stage, when the silica
When the ratio that the weight of powder accounts for the chromogen miberal powder weight is 100% to 120%, then silicon need not be added in the electric furnace smelting stage
Stone.
6. the method for production silicochromium as claimed in claim 1, it is characterised in that also include dolomite in the compound
Powder, the dolomite dust weight are less than the 20% of chromogen miberal powder weight.
7. the method for production silicochromium as claimed in claim 1, it is characterised in that the reducing agent powder reduces for carbonaceous
Agent, the one kind of the carbonaceous reducing agent in coke, semi-coke, anthracite, and fixed carbon total in the carbonaceous reducing agent
Mole is in the chromogen miberal powder 1.6-2.0 times of the mole of oxygen in ferriferous oxide and chromated oxide.
8. the method for production silicochromium as claimed in claim 1, it is characterised in that
The binding agent is bentonite or the mixture of bentonite and starch, and the addition of the binding agent is the chromogen miberal powder
The 3%~8% of weight；
The addition of coke described in step S5 is the 15%~25% of the chromogen miberal powder weight.
9. the method for production silicochromium as claimed in claim 1, it is characterised in that the drying temperature is 100-150 DEG C,
And/or the reduction roasting temperature is 1350 DEG C~1400 DEG C.
10. the method for production silicochromium as claimed in claim 1, it is characterised in that the compound shaping is gone back with described
Returning charge in former roasting process reuses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710674357.1A CN107699685A (en) | 2017-08-09 | 2017-08-09 | A kind of production method of silicochromium |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109338125A (en) * | 2018-09-30 | 2019-02-15 | 东北大学 | A method of silicochromium is prepared using diamond wire sliced crystal scrap silicon |
| WO2019200850A1 (en) * | 2018-04-16 | 2019-10-24 | 盐城市鑫洋电热材料有限公司 | Method for preparing alloy |
| CN112029995A (en) * | 2020-08-09 | 2020-12-04 | 徐州宏阳新材料科技有限公司 | Method for smelting ferrochrome by using ore-smelting furnace added with silica |
| CN114921648A (en) * | 2022-06-17 | 2022-08-19 | 山西太钢万邦炉料有限公司 | Method for producing high-silicon furnace material ferrochrome by submerged arc furnace |
| CN117344132A (en) * | 2023-12-04 | 2024-01-05 | 福建宝雄工业科技有限公司 | Method for preparing silicon-chromium alloy from lithium ore and enriching lithium mixture |
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| CN112029995A (en) * | 2020-08-09 | 2020-12-04 | 徐州宏阳新材料科技有限公司 | Method for smelting ferrochrome by using ore-smelting furnace added with silica |
| CN114921648A (en) * | 2022-06-17 | 2022-08-19 | 山西太钢万邦炉料有限公司 | Method for producing high-silicon furnace material ferrochrome by submerged arc furnace |
| CN117344132A (en) * | 2023-12-04 | 2024-01-05 | 福建宝雄工业科技有限公司 | Method for preparing silicon-chromium alloy from lithium ore and enriching lithium mixture |
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