CN103060518A - Method for preparing steelmaking deoxidization pellets by sliced chip silicon carbide liquid waste - Google Patents
Method for preparing steelmaking deoxidization pellets by sliced chip silicon carbide liquid waste Download PDFInfo
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- CN103060518A CN103060518A CN2013100106162A CN201310010616A CN103060518A CN 103060518 A CN103060518 A CN 103060518A CN 2013100106162 A CN2013100106162 A CN 2013100106162A CN 201310010616 A CN201310010616 A CN 201310010616A CN 103060518 A CN103060518 A CN 103060518A
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- silicon carbide
- deoxidation
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Abstract
The invention relates to the technical field of metallurgy, and particularly relates to a method for preparing steelmaking deoxidization pellets by sliced chip silicon carbide liquid waste. The method disclosed by the invention comprises the following steps of (1) adding distilled water into slicing liquid waste to stir, wherein the volume ratio of the liquid waste to the water is (1:1) to (1:5); and the stirring time is 10-60 minutes; (2) separating the stirred composite mortar for 10-60 minutes in 1000-5000 rpm of centrifugal machine; (3) preparing pellets of which the diameters are 1-2cm from the centrifuged solid material by a disc balling machine, baking the pellets at 100-200 DEG C; and (4) sintering the dried pellets at a certain temperature to obtain silicon carbide deoxidization pellets for steelmaking and deoxidizing. The method has the beneficial effects that the silicon carbide is taken as a deoxidizing agent; the method is strong in reaction, short in deoxidization time, and high in utilization rate of the deoxidizing agent. Thus, the electric energy is saved; the electric furnace efficiency is improved; the oxidization in furnace atmosphere is reduced; the chemical reaction at the steel slag interface is increased; and the formed steel slag is good in mobility, easy to turn over, and low in production cost, and the production operation is facilitated.
Description
Technical field
The present invention relates to metallurgical technology field, be specifically related to a kind of recycling technique of waste, namely utilize cutting silicon wafer silicon carbide waste liquid to prepare the method for deoxidation in steel making pelletizing.
Background technology
Along with the development of photovoltaic industry, silicon carbide is widely used in the multi-wire saw of silicon chip in the solar cell.Usually silicon carbide is in the cutting processing process, because mechanical force causes spherical coefficient, particle diameter and the size distribution of silicon-carbide particles to change, finally causes cutting fluid not satisfy split requirement and becomes slug.Cutting waste mortar main component comprises SiC, polyoxyethylene glycol, Si.SiO
2And Fe, for a long time, these discarded slurries through using have become the heavy burden that silicon chip cuts industry, and a large amount of accumulations not only causes the wasting of resources, and occupied ground, contaminate environment.
Silicon carbide is a kind of artificial material, because its chemical property and physical properties are special, purposes constantly enlarges.Along with the continuous progress of steel-smelting technology, caused extensive attention as the silicon carbide of novel deoxidizer for use.
Deoxidant for steelmaking has ferrosilicon, ferromanganese, silicomanganese at present, is weak reductor, and aluminium has stronger deoxidizing capacity, but contains more Al in the steel
2O
3Can affect mechanical property and the surface quality of steel.Si-Ba alloy is known as reductor, still can not satisfy further lowering the requirement to the molten steel oxygen level at present although it has goodish deoxidizing capacity.In addition, the S ability of taking off of existing Si-Ba alloy is obviously not enough.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing cutting silicon wafer silicon carbide waste liquid to prepare the deoxidation in steel making pelletizing.Waste is recycled, protection of the environment, preparation technology is simple, and production cost is low, has wide using value at the Clean Steel production field.
The object of the invention is achieved through the following technical solutions:
A kind of method of utilizing cutting silicon wafer silicon carbide waste liquid to prepare the deoxidation in steel making pelletizing comprises the steps:
(1) add a certain amount of distilled water stirring in cutting waste liquor, wherein the volume ratio of waste liquid and water is 1:1-1:5, and churning time is 10-60min;
(2) mixed mortar that stirs is separated 10-60min in the 1000-5000rpm whizzer;
(3) the centrifugal solid materials that obtains is prepared into the pelletizing of diameter 1-2cm with balling disc, at 100 ℃-200 ℃ oven dry pelletizings.
(4) pelletizing after will drying at a certain temperature sintering obtain silicon carbide deoxidation pelletizing, for deoxidation in steel making.
A kind of method of utilizing cutting silicon wafer silicon carbide waste liquid to prepare the deoxidation in steel making pelletizing of the present invention has following beneficial effect compared with prior art: the present invention makes reductor with silicon carbide, strong reaction, and deaeration time is short, thus saves energy improves electric furnace efficient; The reductor utilization ratio is high, and oxidation reduces in furnace atmosphere, and the slag interface chemical reaction increases; The slag good fluidity that forms, liable to tip, be conducive to production operation; Compare the silicon carbide low price with ferrosilicon powder, production cost is low.
From thermodynamic condition, the diffusive deoxidation ability of silicon carbide is suitable with the diffusive deoxidation ability of ferrosilicon powder.And when silicon carbide and [O] direct reaction, its deoxidizing capacity is stronger with the deoxidizing capacity of [O] reaction than ferrosilicon powder.Driven mechanics discussion, with in the product of silicon carbide deoxidation except with the ferrosilicon powder deoxidation time the same SiO that produces
2Outward, simultaneously also with the CO γ-ray emission, the CO bubble that generates produces stirring action to slag in floating-upward process, make slag blanket active, impelled the replacement of reaction interface, accelerated the mass transfer velocity of oxygen in slag, thereby be conducive to make whole deoxidation process speed to be accelerated, obtained than the better dynamic conditions of ferrosilicon powder deoxidation.
Therefore, the present invention utilizes the cutting silicon wafer waste mortar to prepare deoxidation in steel making pelletizing method, and the cutting silicon wafer waste mortar makes by the centrifugation means and reaches that polyoxyethylene glycol separates purpose with solid materials in the waste liquid, prepares the deoxidation in steel making pelletizing with solid materials.Waste is recycled, protection of the environment, and also preparation technology is simple, and production cost is low, has wide using value in the Clean Steel production field.
Specific embodiment
Below in conjunction with embodiment a kind of method and technology scheme of utilizing cutting silicon wafer silicon carbide waste liquid to prepare the deoxidation in steel making pelletizing of the present invention is further described.
A kind of method of utilizing cutting silicon wafer silicon carbide waste liquid to prepare the deoxidation in steel making pelletizing of the present invention comprises the steps:
(1) add the distilled water stirring in cutting silicon wafer silicon carbide waste liquid, wherein the volume ratio of cutting silicon wafer silicon carbide waste liquid and distilled water is 1:1-1:5, and churning time is 10-60min;
(2) mixed mortar that stirs is separated 10-60min in the 1000-5000rpm whizzer;
(3) the centrifugal solid materials that obtains is prepared into the pelletizing of diameter 1-2cm with balling disc, at 100 ℃-200 ℃ oven dry pelletizings;
(4) pelletizing after will drying at a certain temperature sintering obtain silicon carbide deoxidation pelletizing, for deoxidation in steel making.
The median particle diameter of the solid materials in the step (3) is the 5-15 micron.
Sintering temperature in the step (4) is 400 ℃～1000 ℃.
The material of the deoxidation in steel making pelletizing in the described step (4) forms the quality percentage composition: SiC 40 %--85%, Si 5 %～50%, SiO
21 %～5%, Fe 1 %～5%.
Embodiment 1:
A kind of method of utilizing cutting silicon wafer silicon carbide waste liquid to prepare the deoxidation in steel making pelletizing comprises the steps:
(1) add a certain amount of distilled water stirring in cutting waste liquor, wherein the volume ratio of waste liquid and water is 1:1, and churning time is 10min;
(2) with the mixed mortar that stirs at the centrifugal 10min of 5000rpm;
(3) the centrifugal solid materials that obtains is prepared into the pelletizing of diameter 1cm with balling disc, at 100 ℃-oven dry pelletizing.
(4) the pelletizing sintering under 400 ℃ of temperature after will drying obtains silicon carbide deoxidation pelletizing, for deoxidation in steel making.
Embodiment 2:
A kind of method of utilizing cutting silicon wafer silicon carbide waste liquid to prepare the deoxidation in steel making pelletizing comprises the steps:
(1) add a certain amount of distilled water stirring in cutting waste liquor, wherein the volume ratio of waste liquid and water is 1:3, and churning time is 30min;
(2) with the mixed mortar centrifugal 30min under 3000rpm that stirs;
(3) the centrifugal solid materials that obtains is prepared into the pelletizing of diameter 1.5cm with balling disc, at 200 ℃-oven dry pelletizing.
(4) the pelletizing sintering under 600 ℃ of temperature after will drying obtains silicon carbide deoxidation pelletizing, for deoxidation in steel making.
Embodiment 3:
A kind of method of utilizing cutting silicon wafer silicon carbide waste liquid to prepare the deoxidation in steel making pelletizing comprises the steps:
(1) add a certain amount of distilled water stirring in cutting waste liquor, wherein the volume ratio of waste liquid and water is 1:5, and churning time is 40min;
(2) with the mixed mortar that stirs at the centrifugal 40min of 2500rpm;
(3) the centrifugal solid materials that obtains is prepared into the pelletizing of diameter 2cm with balling disc, at 150 ℃ of oven dry pelletizings.
(4) the pelletizing sintering under 1000 ℃ of temperature after will drying obtains silicon carbide deoxidation pelletizing, for deoxidation in steel making.
Embodiment 4:
A kind of method of utilizing cutting silicon wafer silicon carbide waste liquid to prepare the deoxidation in steel making pelletizing comprises the steps:
(1) add a certain amount of distilled water stirring in cutting waste liquor, wherein the volume ratio of waste liquid and water is 1:4, and churning time is 50min;
(2) with the mixed mortar that stirs at the centrifugal 20min of 40000rpm;
(3) the centrifugal solid materials that obtains is prepared into the pelletizing of diameter 1.8cm with balling disc, at 150 ℃ of oven dry pelletizings.
(4) the pelletizing sintering under 700 ℃ of temperature after will drying obtains silicon carbide deoxidation pelletizing, for deoxidation in steel making.
Claims (4)
1. a method of utilizing cutting silicon wafer silicon carbide waste liquid to prepare the deoxidation in steel making pelletizing is characterized in that, comprises the steps:
(1) add the distilled water stirring in cutting silicon wafer silicon carbide waste liquid, wherein the volume ratio of cutting silicon wafer silicon carbide waste liquid and distilled water is 1:1-1:5, and churning time is 10-60min;
(2) mixed mortar that stirs is separated 10-60min in the 1000-5000rpm whizzer;
(3) the centrifugal solid materials that obtains is prepared into the pelletizing of diameter 1-2cm with balling disc, at 100 ℃-200 ℃ oven dry pelletizings;
(4) pelletizing after will drying at a certain temperature sintering obtain silicon carbide deoxidation pelletizing, for deoxidation in steel making.
2. the method for utilizing cutting silicon wafer silicon carbide waste liquid to prepare the deoxidation in steel making pelletizing according to claim 1, the median particle diameter that it is characterized in that the solid materials in the described step (3) is the 5-15 micron.
3. the method for utilizing cutting silicon wafer silicon carbide waste liquid to prepare the deoxidation in steel making pelletizing according to claim 1 is characterized in that the sintering temperature in the described step (4) is 500 ℃～1000 ℃.
4. the method for utilizing cutting silicon wafer silicon carbide waste liquid to prepare the deoxidation in steel making pelletizing according to claim 1, the material composition quality percentage composition that it is characterized in that the deoxidation in steel making pelletizing in the described step (4) is: SiC 40 %--85%, Si 5 %～50%, SiO
21 %～5%, Fe 1 %～5%.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104726642A (en) * | 2015-02-03 | 2015-06-24 | 林州市清华·红旗渠新材料产业化发展中心 | Deoxidizing block for steelmaking and preparation method thereof |
| CN105385807A (en) * | 2015-10-15 | 2016-03-09 | 郑州新达冶金技术有限公司 | Method for manufacturing silicon and carbon composite balls through waste mortar generated during silicon slice cutting and application of silicon and carbon composite ball |
| CN105817463A (en) * | 2016-03-25 | 2016-08-03 | 无锡宇辰工业污泥处理技术研究院有限公司 | Resourceful treatment method for crystalline silicon cutting waste mortar and aluminum oxidation sludge |
| CN106916920A (en) * | 2017-04-09 | 2017-07-04 | 江苏阳帆机电设备制造有限公司 | The method that the silicon powder discarded after a kind of use solar energy silicon crystal chip Buddha's warrior attendant wire cutting makes steel-making reducing agent |
| CN106995867A (en) * | 2017-04-09 | 2017-08-01 | 江苏阳帆机电设备制造有限公司 | After a kind of wire cutting with solar energy silicon crystal chip discard carborundum/silicon powder come make steel-making heating agent method |
| CN107433279A (en) * | 2016-05-27 | 2017-12-05 | 成亚资源科技股份有限公司 | Useless silicon mud recycles processing method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104726642A (en) * | 2015-02-03 | 2015-06-24 | 林州市清华·红旗渠新材料产业化发展中心 | Deoxidizing block for steelmaking and preparation method thereof |
| CN105385807A (en) * | 2015-10-15 | 2016-03-09 | 郑州新达冶金技术有限公司 | Method for manufacturing silicon and carbon composite balls through waste mortar generated during silicon slice cutting and application of silicon and carbon composite ball |
| CN105817463A (en) * | 2016-03-25 | 2016-08-03 | 无锡宇辰工业污泥处理技术研究院有限公司 | Resourceful treatment method for crystalline silicon cutting waste mortar and aluminum oxidation sludge |
| CN107433279A (en) * | 2016-05-27 | 2017-12-05 | 成亚资源科技股份有限公司 | Useless silicon mud recycles processing method |
| CN106916920A (en) * | 2017-04-09 | 2017-07-04 | 江苏阳帆机电设备制造有限公司 | The method that the silicon powder discarded after a kind of use solar energy silicon crystal chip Buddha's warrior attendant wire cutting makes steel-making reducing agent |
| CN106995867A (en) * | 2017-04-09 | 2017-08-01 | 江苏阳帆机电设备制造有限公司 | After a kind of wire cutting with solar energy silicon crystal chip discard carborundum/silicon powder come make steel-making heating agent method |
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Application publication date: 20130424 |