CN101469378A - Method for preparing alsifer from high-alumina fly ash and magnetic beads - Google Patents
Method for preparing alsifer from high-alumina fly ash and magnetic beads Download PDFInfo
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- CN101469378A CN101469378A CNA2007103040621A CN200710304062A CN101469378A CN 101469378 A CN101469378 A CN 101469378A CN A2007103040621 A CNA2007103040621 A CN A2007103040621A CN 200710304062 A CN200710304062 A CN 200710304062A CN 101469378 A CN101469378 A CN 101469378A
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Abstract
The invention discloses a method for preparing AL-Si-Fe alloy by utilizing high-aluminum fly ash and magnetic beads, which relates to the technical field of nonferrous metallurgy. The method comprises the following steps: 1) a bauxite raw material and a reducing agent-bituminous coal are crushed, and the crushed materials and raw materials (the high-aluminum fly ash and the magnetic beads) are sent into a mixing pan; 2) an adhesive-clay and a certain amount of water are added into the mixing pan to mixedly roll the materials; 3) the materials which are mixedly rolled evenly enter a twinroller machine for granulation; 4) pellets which come from the twinroller machine enter a drying kiln for drying; 5) the dried pellets are added into a submerged arc furnace for high-temperature smelting; and 6) molten iron is taken out of the furnace, and an ingot mold is cast to obtain the AL-Si-Fe alloy. The method has the advantages of broad raw material source, low production cost, good performance of the pellets containing fly ash, even furnace-entering smelting constituents, and complete reaction, makes the submerged arc furnace keep good furnace condition, ensures that the produced AL-Si-Fe alloy has steady performance, and realizes the resource utilization of waste.
Description
Technical field
The present invention relates to the production method of AL-Si-Fe alloy, particularly utilize aluminous fly-ash and magnetic bead to prepare the method for AL-Si-Fe alloy.
Background technology
AL-Si-Fe alloy is widely used in steelworks as composite deoxidant.The density of AL-Si-Fe alloy is bigger than fine aluminium, enters molten steel easily, and inner scaling loss is few, is enhanced about more than once than the rate of utilization of using fine aluminium to do reductor aluminium in steelmaking process.Form low-melting product with the AL-Si-Fe alloy deoxidation, float to the molten steel surface easily, reduce impurity in the steel, the effect of pure molten steel is arranged, improve the quality of steel.
The production method of AL-Si-Fe alloy has electric heating process, remelting process and hot-metal process.Electric heating process is mainly to utilize raw ore siliceous, aluminium, is that reductive agent is directly smelted and made with coke, bituminous coal in the hot stove in ore deposit.Present used main raw material is bauxite, kaolin, silica etc., and its production is subjected to the influence of distribution, reserves, ore characteristic of China's ore resource etc.At present, China's bauxite resource shortage, ore resource is in short supply not only can to increase production cost, and directly influence production is carried out.Remelting process is fine aluminium, ferrosilicon to be cast behind the induction refusion in the stove according to certain proportioning form.Because fine aluminium, ferrosilicon etc. are the high energy consumption product, melting energy consumption again is bigger again, and have aluminium in the reflow process, the element silicon scaling loss is big, thereby cost is higher.Hot-metal process is when ferrosilicon or Alsimin are come out of the stove, and adds the method production of aluminium ingot hot melt in hot metal ladle, and the shortcoming that also exists remelting process to produce is because the density variation of raw material often causes product composition inhomogeneous.
Electric heating process smelting ferro-silicon-aluminium alloy raw material is mainly bauxite, silica, steel cuttings in the prior art, is respectively silicon, aluminium, iron three's source.And the content of main chemical compositions silicon-dioxide and aluminum oxide accounts for more than 75% in power plant's waste flyash, the high flyash of certain areas sial content, the two content can replace bauxite, silica as the raw material of smelting Alar up to 90% fully.Being in the patent of invention that " the producing the novel process of Alsimin with flyash " of delivering on 1996 the 3rd phases " total utilization of PCA " and " the feasibility test research of coal ash ball nodulizing smelting Si-Al-Fe alloy " delivered on 1998 the 1st phases " iron alloy " and the patent No. are ZL200510017519.1 utilizes flyash to be the raw material smelting Si-Al-Fe alloy.But, adopt the alumina content in the general flyash of this technology lower, only with flyash or flyash and bituminous coal balling-up, other bauxite raw material, steel cuttings etc. will adopt stove to add partially outward, make that the charge composition that enters smelting in the stove is inhomogeneous, easily cause reaction insufficient.Because flyash pelletizing light specific gravity, ventilation property is poor, and ultimate compression strength is low, so pelletizing cracky under the high temperature causes the material that collapses, makes the working of a furnace worsen the product performance instability.And the steel cuttings price is higher, and production cost is increased.
Summary of the invention
At above-mentioned deficiency of the prior art, the purpose of this invention is to provide a kind of method of utilizing aluminous fly-ash and magnetic bead to prepare AL-Si-Fe alloy.It is to be main raw material with aluminous fly-ash and magnetic bead, is that adhesive preparation becomes high performance pelletizing with the clay, smelts to make AL-Si-Fe alloy in the hot stove in ore deposit.Present method not only raw material sources is wide, and production cost is low and to contain flyash pelletizing performance good, and going into stove, to smelt composition even, and sufficient reacting makes the hot stove working of a furnace in ore deposit keep good, and the production product performance are stable, realized the changing waste into resources utilization.
In order to realize the foregoing invention purpose, technical scheme of the present invention realizes as follows:
A kind of method of utilizing aluminous fly-ash and magnetic bead to prepare AL-Si-Fe alloy the steps include:
1) bauxite raw material and reductive agent bituminous coal are carried out fragmentation, the material after the fragmentation and raw material aluminous fly-ash, magnetic bead are sent into mixing pan, wherein Al in the aluminous fly-ash
2O
3Content 〉=40%, SiO
2Content 〉=35%;
2) binding agent clay and certain water gaging are added in the mixing pan, the above material is mixed roll;
3) material of mixed grind after evenly enters the balling-up of pair roller ball press;
4) pelletizing that comes out from ball press enters the drying kiln oven dry;
5) dried pelletizing drops into the hot furnace high-temperature smelting in ore deposit;
6) ingot mould is come out of the stove, watered to molten iron, makes AL-Si-Fe alloy.
In above-mentioned steps, described aluminium vanadine is high ferro calcining aluminium vanadine, wherein Fe
2O
3〉=5%.
In above-mentioned steps, described magnetic bead is the iron-holder higher glass microballon of flyash through the magnetic separation gained, Fe
2O
3〉=50%.
In above-mentioned steps, described raw material can also add a small amount of silica, and proportioning raw materials is determined according to the content and the ferro-silicon-aluminium product code numbering of each starting material chemical ingredients.
In above-mentioned steps, the granularity of described binding agent clay is below 200 orders, and plasticity index is greater than 15, and the add-on of clay is 6～10% of a charge total amount.
In above-mentioned steps, the described mixing time of rolling is 8～15min.
In above-mentioned steps, the one-tenth ball pressure of described pair roller ball press is 6～9Mpa.
In above-mentioned steps, the drying time of described drying kiln is 1～1.5 hour, and temperature is 150～180 ℃.
Compared with the prior art, the invention has the advantages that:
(1) magnetic bead is the iron content microballon after the fly ash in electric power plant magnetic separation, replace steel cuttings, mix the back balling-up with other raw materials, each composition uniform distribution, contact area are big, easily generate iron aluminide during reduction, improved the activity of aluminum oxide, reduce reduction temperature, help the reduction of aluminium, and increase slag fluidity, reduce the alloy fluid viscosity, can improve the working of a furnace.Can reduce production costs greatly simultaneously.
(2) because aluminous fly-ash and magnetic bead granularity are thinner, add the part bauxitic clay in the raw material, can when balling-up, form grain composition, improve balling-up intensity, can adjust batching simultaneously.
(3) utilize clay to make binding agent, plasticity-is good, and the permeability of balling-up pelletizing is good, and the ultimate compression strength height can keep pelletizing later strength at high temperature, avoids the material that collapses in the stove, keeps the good working of a furnace.
(4) the raw materials used aluminous fly-ash of the present invention, magnetic bead and aluminium vanadine are industrial solid castoff, realized the changing waste into resources utilization, greatly reduce production cost, also to alleviating the shortage of China's natural bauxite resource, promote recycling economy and energy-saving and emission-reduction industry development to have the important strategic meaning simultaneously.
Description of drawings
Accompanying drawing is technological process of production figure of the present invention.
Embodiment
Referring to accompanying drawing, the present invention is described in further detail in conjunction with embodiment.
1. raw material selects for use aluminous fly-ash to contain Al
2O
352%, SiO
238%, Fe
2O
32.5%, magnetic bead contains Al
2O
315.4%, SiO
225.5%, Fe
2O
355.1%, add part bauxitic clay and a small amount of silica.Feed proportioning is: aluminous fly-ash, magnetic bead, bauxitic clay, silica, bituminous coal weight are respectively 82kg, 68kg, 40kg, 5kg, 190kg in every batch of material.Weigh in above ratio, bauxitic clay is earlier slightly broken through jaw crusher, then with bituminous coal together after hammer mill is carefully broken, enter mixing pan, aluminous fly-ash and magnetic bead directly enter mixing pan.
2. add granularity during mixed grind and be that 200 orders are following, plasticity index is greater than 15 binding agent clay 30kg, adds certain water gaging again, amount of water with the humidity of mixture the roller of sticking ball press be advisable.
3. behind the mixed grind 10min, the material that mixes enters the pair roller ball press, and the one-tenth ball pressure is 8Mpa.
4. the pelletizing that comes out from ball press enters the drying kiln drying, and temperature is 150 ℃, 1 hour time.
5. dry back pelletizing is delivered to the flushing and casting platform, adds then in the hot stove in 2200KVA ore deposit and smelts.Mine heat furnace smelting adopts the method for smoldering jetsam, and electrode is stablized buried, few fire, many smolderings.Smoldering was tapped a blast furnace in 2～3 hours.
6. the ingot mould of casting after molten iron is come out of the stove, cooling makes AL-Si-Fe alloy then.AL-Si-Fe alloy product test chemical ingredients is Si26～30%, Al34～38%, Fe24～28%.
Claims (8)
1, a kind of method of utilizing aluminous fly-ash and magnetic bead to prepare AL-Si-Fe alloy the steps include:
1. bauxite raw material and reductive agent bituminous coal are carried out fragmentation, the material after the fragmentation and raw material aluminous fly-ash, magnetic bead are sent into mixing pan, wherein Al in the aluminous fly-ash
2O
3Content 〉=40%, SiO
2Content 〉=35%;
2. binding agent clay and certain water gaging are added in the mixing pan, the above material is mixed roll;
3. the material of mixed grind after evenly enters the balling-up of pair roller ball press;
4. the pelletizing that comes out from ball press enters the drying kiln oven dry;
5. dried pelletizing drops into the hot furnace high-temperature in ore deposit and smelts;
6. ingot mould is come out of the stove, watered to molten iron, makes AL-Si-Fe alloy.
According to the described method of utilizing aluminous fly-ash and magnetic bead to prepare AL-Si-Fe alloy of claim 1, it is characterized in that 2, described aluminium vanadine is high ferro calcining aluminium vanadine, wherein Fe
2O
3〉=5%.
According to the described method of utilizing aluminous fly-ash and magnetic bead to prepare AL-Si-Fe alloy of claim 1, it is characterized in that 3, described magnetic bead is the iron-holder higher glass microballon of flyash through the magnetic separation gained, Fe
2O
3〉=50%.
4, according to each described method of utilizing aluminous fly-ash and magnetic bead to prepare AL-Si-Fe alloy in the claim 1,2 or 3, it is characterized in that, described raw material can also add a small amount of silica, and proportioning raw materials is determined according to the content and the ferro-silicon-aluminium product code numbering of each starting material chemical ingredients.
According to the described method of utilizing aluminous fly-ash and magnetic bead to prepare AL-Si-Fe alloy of claim 4, it is characterized in that 5, the granularity of described binding agent clay is below 200 orders, plasticity index is greater than 15, and the add-on of clay is 6～10% of a charge total amount.
According to the described method of utilizing aluminous fly-ash and magnetic bead to prepare AL-Si-Fe alloy of claim 5, it is characterized in that 6, the described mixing time of rolling is 8～15min.
According to the described method of utilizing aluminous fly-ash and magnetic bead to prepare AL-Si-Fe alloy of claim 6, it is characterized in that 7, the one-tenth ball pressure of described pair roller ball press is 6～9Mpa.
According to the described method of utilizing aluminous fly-ash and magnetic bead to prepare AL-Si-Fe alloy of claim 7, it is characterized in that 8, the drying time of described drying kiln is 1～1.5 hour, temperature is 150～180 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103040621A CN101469378B (en) | 2007-12-24 | 2007-12-24 | Method for preparing alsifer from high-alumina fly ash and magnetic beads |
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|---|---|---|---|
| CN2007103040621A CN101469378B (en) | 2007-12-24 | 2007-12-24 | Method for preparing alsifer from high-alumina fly ash and magnetic beads |
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|---|---|
| CN101469378A true CN101469378A (en) | 2009-07-01 |
| CN101469378B CN101469378B (en) | 2010-12-15 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826776A (en) * | 2012-08-02 | 2012-12-19 | 亿利资源集团有限公司 | Method for simultaneously extracting glass microbeads from fly ash and coproducing aluminum-silicon-iron alloy and white carbon black |
| CN103642979A (en) * | 2013-12-13 | 2014-03-19 | 唐山国丰钢铁有限公司 | Using method of silicon-aluminum alloy |
| CN103710488A (en) * | 2013-12-09 | 2014-04-09 | 东北大学 | Method for preparing Al-Si-Fe alloy by using high-ferrum and high-silicon bauxite |
| CN108147443A (en) * | 2018-02-07 | 2018-06-12 | 重庆大学 | Aluminium oxide and the method for preparing Antaciron are extracted from flyash |
| CN109536727A (en) * | 2019-01-18 | 2019-03-29 | 东北大学 | A method of ferrosilicon aluminium is prepared with flyash carbon thermal reduction |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316046C (en) * | 2005-04-18 | 2007-05-16 | 登封电厂集团有限公司 | Method for smelting ferro-silicon-aluminium alloy using flyash |
-
2007
- 2007-12-24 CN CN2007103040621A patent/CN101469378B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826776A (en) * | 2012-08-02 | 2012-12-19 | 亿利资源集团有限公司 | Method for simultaneously extracting glass microbeads from fly ash and coproducing aluminum-silicon-iron alloy and white carbon black |
| CN102826776B (en) * | 2012-08-02 | 2014-07-09 | 亿利资源集团有限公司 | Method for simultaneously extracting glass microbeads from fly ash and coproducing aluminum-silicon-iron alloy and white carbon black |
| CN103710488A (en) * | 2013-12-09 | 2014-04-09 | 东北大学 | Method for preparing Al-Si-Fe alloy by using high-ferrum and high-silicon bauxite |
| CN103710488B (en) * | 2013-12-09 | 2015-12-09 | 东北大学 | A kind of high ferro high-silica diaspore ore prepares the method for AL-Si-Fe alloy |
| CN103642979A (en) * | 2013-12-13 | 2014-03-19 | 唐山国丰钢铁有限公司 | Using method of silicon-aluminum alloy |
| CN108147443A (en) * | 2018-02-07 | 2018-06-12 | 重庆大学 | Aluminium oxide and the method for preparing Antaciron are extracted from flyash |
| CN109536727A (en) * | 2019-01-18 | 2019-03-29 | 东北大学 | A method of ferrosilicon aluminium is prepared with flyash carbon thermal reduction |
| CN109536727B (en) * | 2019-01-18 | 2020-05-22 | 东北大学 | Method for preparing silicon-iron-aluminum alloy by using coal ash carbon thermal reduction |
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| CN101469378B (en) | 2010-12-15 |
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