CN1360062A - Process for producing nodular graphite cast iron and gray cast iron with cast iron filings in cupola furnace - Google Patents
Process for producing nodular graphite cast iron and gray cast iron with cast iron filings in cupola furnace Download PDFInfo
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- CN1360062A CN1360062A CN 01140111 CN01140111A CN1360062A CN 1360062 A CN1360062 A CN 1360062A CN 01140111 CN01140111 CN 01140111 CN 01140111 A CN01140111 A CN 01140111A CN 1360062 A CN1360062 A CN 1360062A
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
A process for producing nodular graphite iron casting and gray iron casting frame cast iron filings in cupola furnace includes mixing said cast iron filings, coagulant, antioxidizing agent, carbon increaser, flux and water together, stirring, shaping blocks, coagulating, drying and charging them into cupola furnace. Its advantage is very low cost.
Description
Technical field
The present invention relates to a kind of technology of producing nodular iron casting and gray iron casting, belong to casting field with the cupola melting cast iron filing.
Background technology
Background technology mainly contains two kinds: what (1) had before utilized cupola furnace production nodular iron casting and gray iron casting employing is the technology that ingot pig is gone into cupola furnace; (2) original recycling technology of cast iron filing is by department of recovery cast iron filing to be recovered to the ironmaking production unit again to carry out the remelting processing in iron-smelting furnace, is smelted into ingot pig.From above two kinds of prior aries, cast iron filing can not directly enter cupola furnace and produce ironcasting and can only just can enter cupola furnace production ironcasting to cast iron filing after being smelted into ingot pig in the iron-smelting furnace.
Summary of the invention
Technical problem to be solved by this invention provides a kind of technology of using cupola furnace cast iron filing to be produced ironcasting directly into stove.Alleged " directly into the stove " of the present invention is not only to be that simple cast iron filing is put into the method that cupola furnace is produced ironcasting isolatedly, but the key distinction is stepped into one of oven process in background technology medium cast iron bits two and stepped into oven process." stove " in " directly into stove " is meant cupola furnace.
The scheme that the present invention addresses this problem is to utilize the cupola melting foundry engieering, it is characterized in that using cast iron filing to produce ironcasting directly into stove.
The technology that described use cast iron filing is produced ironcasting directly into stove need use the spheroidal graphite cast iron iron filings directly into stove when producing nodular iron casting.
The technology that described use cast iron filing is produced ironcasting directly into stove both can use the graphitic cast iron iron filings also can use the spheroidal graphite cast iron iron filings directly into stove when producing gray iron casting.
Described use cast iron filing is produced ironcasting technology directly into stove, it is characterized in that cast iron filing, cement, low-sulfur hard coal, lime powder and water being stirred into piece together and solidifying dry back directly into stove.
Described use cast iron filing is produced ironcasting technology directly into stove, it is characterized in that adding in base iron nodulizing agent or nucleating agent.
Described use cast iron filing is produced ironcasting technology directly into stove, its production unit can have: (1) cupola furnace (hotblast stove is better), the big I of its model is decided according to output, and it is example that Yi Yitai per hour produces 2 tons cupola furnace, and every stove can be produced 10 tons of left and right sides foundry goods (cylinder iron bits); (2) sand mill; (3) newly-increased cement flooring is additional work of the present invention place.According to a cupola furnace of per hour producing 2 tons is that example increases 100-150 square metre of cement flooring approximately.
Described use cast iron filing is produced ironcasting technology directly into stove, and the item that needs during it is produced to illustrate is with cupola furnace cast iron filing to be gone into the stove remelting at first will solve iron filings blowing mistake and problem of oxidation in stove.The way that solves this difficult problem has: (1) uses the cement freezing method, with cement after the low hard coal of iron filings and sulphur content and lime powder and water stir into piece and solidify drying, its intensity is unlikely crowded broken and blows mistake to fusing after can bearing stove, substitute Wingdale simultaneously, solved the mistake problem of blowing of iron filings.By facts have proved its shape no change before the iron filings fusing, working of a furnace operation is normal.(2) with the easy oxidation of iron filings remelting, the hard coal that adds in whipping process by test makes the iron filings surface form an anti oxidation layer, when 1000 degree Celsius are following, can produce dense CO (carbon monoxide converter) gas after going into stove simultaneously, deficiency with CO (carbon monoxide converter) gas in the supplementary furnace, make furnace gas be more conducive to the reduction of iron filings oxidized portion, the rate of tapping a blast furnace of iron filings is reached to 90-95%, the same substantially with the rate of tapping a blast furnace of directly cylinder iron going into stove.(3) by above measure, the iron oxide content of the base iron after iron filings melt is reduced, effectively controlled the generation of molten iron chilling tendency, add and use nodulizing agent or nucleating agent can produce that its whole silicon amount is no more than 3.2 nodular iron casting or gray iron casting (is annotated: need be raw material with the spheroidal graphite cast iron iron filings as producing nodular iron casting, stable to guarantee its element, can produce 400-10 as cast condition or annealed state spheroidal graphite cast iron.When producing graphitic cast iron starting material with grey iron filings or magnesium iron consider to be worth doing all can, can guarantee to produce general trade mark cast iron).
The invention has the beneficial effects as follows: (1) this technology can make the spray per ton 30-40% that reduces cost.With 1 ton of 14# cast iron is example, existing valency per ton is about 1250 yuan, and the iron filings price only is about 600-650 unit, and the iron filings aboundresources, is example with China's 95,000,000 tons of sprays of annual product, the average iron filings of processing generally account for the 10-25% of blank weight, by minimum 10% calculating, will have the iron filings resource about 9,500,000 tons national every year, as with cupola furnace iron filings being produced ironcasting directly into stove, but 200 yuan of calculating of net added value per ton will produce 19 hundred million of economic benefits every year.This technology raw material and attaching material aboundresources in addition, technology is easily grasped, and equipment is simple, and promotional value is arranged very much.(2) before, because the iron filings recycling channel is not smooth, quite a few iron filings is arbitrarily outwelled, and causes environmental pollution.(3) applicant has made this technology progressively perfect by effort in nearly 2 years.Produced 8 heats in every month with applicant place factory, it is example for 8 tons that every heat is produced nodular iron casting, about 2.5 ten thousand yuan of the expenses that can reduce cost in every month, the nodular iron casting of bearing shell body that the rail vehicle of trial production is used and building machinery stapling machine, bending machine, its wall thickness is all in the 30-80 millimeter, all can reach the standard of 400-10, for a solid technical foundation has been established in the development of foundry.
Embodiment
Embodiment one
2 tons of simple spheroidal graphite cast iron bits are added cupola furnace, utilize cupola melting foundry engieering casting nodular iron casting.Though this embodiment produces effect but effect is the poorest worst, mainly show and to cause iron filings to blow mistake, the molten iron severe oxidation.Furnace temperature is undesired even freeze the stove phenomenon often, and spoken parts in traditional operas can appear in its molten steel quality.This embodiment is intended to support independent claim 1 and dependent claims 2.
Embodiment two
1.5 tons of graphitic cast iron iron filings are added cupola furnace, utilize cupola melting foundry engieering casting gray iron casting.This embodiment can only reach the effect of general foundry goods that can not smear metal.This embodiment is intended to support independent claim 1 and dependent claims 3.
Embodiment three
2.5 tons of spheroidal graphite cast iron iron filings are added cupola furnace, utilize cupola melting foundry engieering casting gray iron casting.Though this embodiment element is stable, it is very serious that it blows mistake, oxidation, gives to breed and cause certain difficulty.This embodiment equally is intended to support independent claim 1 and dependent claims 3 with embodiment two.
Embodiment four
1 ton of spheroidal graphite cast iron bits, 0.15 ton of cement, 0.05 ton of low-sulfur hard coal, 0.1 ton of lime powder and 0.5 ton of water are stirred into piece together and solidifies dry back adding cupola furnace, utilize cupola melting foundry engieering casting nodular iron casting.This embodiment can only arrive general effect because ratio is not good.Though show that mainly the rate of tapping a blast furnace is high, it is serious to rinse stove, molten iron temperature is low, and burnt consumption is high, causes certain difficulty to nodularization.This embodiment is intended to support 4, claim 2 and 1.
Embodiment five
1 ton of graphitic cast iron bits, 0.05 ton of cement, 0.15 ton of low-sulfur hard coal, 0.07 ton of lime powder and 0.05 ton of water are stirred into piece together and solidifies dry back adding cupola furnace, utilize cupola melting foundry engieering casting gray iron casting.This embodiment can only arrive general effect because ratio is not good.Show that mainly pregnant effect is poor.This embodiment is intended to support 4, claim 3 and claim 1.
Embodiment six
1 ton of spheroidal graphite cast iron bits, 0.05 ton of cement, 0.15 ton of low-sulfur hard coal, 0.07 ton of lime powder and 0.05 ton of water are stirred into piece together and solidifies dry back adding cupola furnace, utilize the cupola melting foundry engieering, in base iron, add nodulizing agent or nucleating agent.Though this embodiment ratio is not good, has added nodulizing agent or nucleating agent, effect is better slightly than embodiment five.This embodiment is intended to support claim 5, claim 4, claim 2 and 1.This embodiment has supported claim 3 again with embodiment four.
Above embodiment has fully reproduced the present invention.Because the present invention does not provide optimum proportion, so can only reach general effect, this has satisfied the authorising conditional of patent.The applicant has the right optimum formula is maintained secrecy or applied for a prescription patent relevant with this invention again with regard to optimum formula.When also being intended to transfer the possession of this invention, the applicant gratuitously or with compensation optimum formula is revealed to the transferee.
Claims (5)
1, a kind of technology of producing nodular iron casting and gray iron casting is utilized the cupola melting foundry engieering, it is characterized in that using cast iron filing to produce ironcasting directly into stove.
2, the technology of production nodular iron casting according to claim 1 and gray iron casting is characterized in that need using the spheroidal graphite cast iron iron filings directly into stove when producing nodular iron casting.
3, the technology of production nodular iron casting according to claim 1 and gray iron casting is characterized in that both can having used the graphitic cast iron iron filings also can use the spheroidal graphite cast iron iron filings directly into stove when producing gray iron casting.
4,, it is characterized in that cast iron filing, cement, low-sulfur hard coal, lime powder and water being stirred into piece together and solidifying dry back directly into stove according to the technology of claim 1 or 2 or 3 described production nodular iron castings and grey ironware.
5, the technology of production nodular iron casting according to claim 4 and gray iron casting is characterized in that adding nodulizing agent or nucleating agent in base iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01140111 CN1360062A (en) | 2001-11-26 | 2001-11-26 | Process for producing nodular graphite cast iron and gray cast iron with cast iron filings in cupola furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01140111 CN1360062A (en) | 2001-11-26 | 2001-11-26 | Process for producing nodular graphite cast iron and gray cast iron with cast iron filings in cupola furnace |
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| Publication Number | Publication Date |
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| CN1360062A true CN1360062A (en) | 2002-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01140111 Pending CN1360062A (en) | 2001-11-26 | 2001-11-26 | Process for producing nodular graphite cast iron and gray cast iron with cast iron filings in cupola furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671753A (en) * | 2009-10-09 | 2010-03-17 | 青特集团有限公司 | Method for preparing gray cast iron |
| CN102304659A (en) * | 2011-09-22 | 2012-01-04 | 南乐县宏兴铸造厂 | Casting production technology of gray iron |
| US9591854B2 (en) | 2012-06-18 | 2017-03-14 | Basf Se | Agroformulations containing a lactone based alkoxylate |
-
2001
- 2001-11-26 CN CN 01140111 patent/CN1360062A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671753A (en) * | 2009-10-09 | 2010-03-17 | 青特集团有限公司 | Method for preparing gray cast iron |
| CN102304659A (en) * | 2011-09-22 | 2012-01-04 | 南乐县宏兴铸造厂 | Casting production technology of gray iron |
| US9591854B2 (en) | 2012-06-18 | 2017-03-14 | Basf Se | Agroformulations containing a lactone based alkoxylate |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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