CN1891838A - A briquette for use as steelmaking material - Google Patents
A briquette for use as steelmaking material Download PDFInfo
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- CN1891838A CN1891838A CNA2006100844886A CN200610084488A CN1891838A CN 1891838 A CN1891838 A CN 1891838A CN A2006100844886 A CNA2006100844886 A CN A2006100844886A CN 200610084488 A CN200610084488 A CN 200610084488A CN 1891838 A CN1891838 A CN 1891838A
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- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/32—Presses specially adapted for particular purposes for consolidating scrap metal or for compacting used cars
- B30B9/327—Presses specially adapted for particular purposes for consolidating scrap metal or for compacting used cars for briquetting scrap metal
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Abstract
Cotton-like aggregates (B) containing grinding chips from an iron-based metal and a grinding fluid containing oil and water are compression molded thereby forming a brittle compact (C) in which the fibrous grinding chips are roughly sheared and which is removed of excessive water and oil. The brittle compact (C) is crushed for further finely shearing the grinding chips and then, the resultant grinding chips are mixed with a solidification assistant(D) for obtaining powder (E) containing the solidification assistant(D). The powder (E) is solidified by compression molding, thereby forming a water-containing briquette (F). A briquette (A) for use as steelmaking material, which contains powdery pure iron and oil, is obtained by removing the water from the water-containing briquette (F). Without crushing the brittle compact (C), it is also possible to form the briquette (A) for use as steelmaking material by impregnating the brittle compact (C) with the solidification assistant(D) and then drying the compact.
Description
The application is that denomination of invention is the dividing an application of No. 01802354.1, Chinese patent application of " use as steelmaking material briquette and manufacture method thereof ", original bill international application no PCT/JP01/06849,9 days Augusts calendar year 2001 of international filing date.
[technical field]
The present invention relates to the briquette and the manufacture method thereof of use as steelmaking material, particularly effectively utilize the technology of the grinding smear metal of Ferrious material.
[background technology]
The smear metal that produces when Ferrious materials such as grinding (following finger comprises the notion of grinding, super back grinding and polishing etc.) bearing steel or converted steel is recovered as continuous shape (fibrous) agglomeratioies such as grinding fluid that contains moisture and oil content and abrasives.This silk floss shape agglomeration owing to contain a large amount of pure iron, is tested as steelmaking feed and is utilized.But, because this silk floss shape agglomeration contains a large amount of moisture, so when they are dropped into blast furnace, cause the so-called problem that produces bumping (water vapour blast) by this moisture.Therefore, consider to remove moisture in the continuous shape agglomeration with methods such as centrifugations, the oil content and the moisture that at this moment are contained in the continuous shape agglomeration are removed simultaneously, because generating heat naturally of continuous shape body agglomeration makes the pure iron as the composition of grinding smear metal become ferric oxide.For this reason, want to utilize again them just must reduce, owing to using reductive agent that cost is uprised as steelmaking feed.
In addition, be difficult to tight contact each other owing to adhered to the grinding smear metal of above-mentioned oil content, therefore, even the continuous shape agglomeration of compression molding also is difficult to carry out the curing of desired intensity.Have again, for comprising the continuous shape agglomeration of grinding smear metal that a large amount of carbon contents accounts for the Ferrious material more than 0.2% of weight, because bounce is very big during compression, so, also be difficult to carry out desirable curing even with its compression molding.Thereby,, also can produce the problem of dispersing and waving in the wind even the continuous shape agglomeration of compression molding is dropped in the blast furnace.Major part will reclaim by particle collector,
Have again, be included in the intravital fibrous grinding smear metal of above-mentioned continuous shape aggegation, owing to be difficult to pulverizing such as runner millings, so can not fine cut off continuous shape agglomeration.Therefore it also is difficult continuous shape agglomeration being processed into briquette etc.
Thereby, no longer utilize above-mentioned continuous shape agglomeration but entrust waste treatment unit to bury to be treated as realistic state.
In addition, in the iron and steel manufacturing process of melting process etc., owing to produce the dust that contains iron and heavy metal, so reclaim (for example opening flat 7-97638 communique) with reference to the spy as collecting dust (0G divides dirt), yet when dropping into blast furnace when this collection dust is remained untouched, disperse in the same old way and wave in the wind, owing to need reclaim again with particle collector, so bury and handled with regard to no longer utilizing.
But, bury processing like this, be bad from the viewpoint of resources effective utilization.Except that causing environmental degradation, also has the high problem of processing cost.Particularly collect dust,,, have the higher problem of processing cost so need special industry to bury processing of waste owing to contain heavy metal.
The objective of the invention is to, the briquette and the manufacture method thereof of the use as steelmaking material that can utilize the grinding smear metal effectively again is provided.
Another object of the present invention is, briquette and the manufacture method thereof that can utilize the grinding smear metal effectively again and collect the steel-making usefulness of dust are provided.
[summary of the invention]
The briquette of use as steelmaking material of the present invention is the exsiccant briquette that contains powdered pure iron and oil content, it is characterized in that, is cured with solidifying the continuous shape agglomeration of auxiliary to the grinding smear metal that contains Ferrious material of trickle cut-out.
The briquette of the use as steelmaking material of Gou Chenging like this owing to be the exsiccant solids, so even it is intactly dropped in the blast furnace, also do not have bumping and the danger of dancing in the air, is carried, processing such as storage also becomes easy simultaneously.In addition, owing to contain oil content, so prevent the oxidation of powdery pure iron.Thereby might utilize again as high-quality steelmaking feed, when helping environment protection, can reduce the obsolescence cost of grinding smear metal.
The briquette of above-mentioned use as steelmaking material also can contain the powder of coke, at this moment, because above-mentioned curing auxiliary and coke are arranged, and so only need the compression molding powder just can obtain very firm solidified use as steelmaking material briquette.
The briquette that contains the use as steelmaking material of this coke also can contain the dust that reclaims again in iron and steel manufacturing process.At this moment can solidify above-mentioned dust and utilize the grinding smear metal simultaneously again.
As above-mentioned curing auxiliary, preferably from rice bran, waste molasses, starch based, unslaked lime, colloidal silica, water glass, aluminum phosphate, vinyl acetate mud, asphalt emulsion, wilkinite, select at least a.Thus, even contain oil content, also can firmly solidify.Therefore, processing such as carrying, storage become easier.
Another kind of briquette of the present invention, it is the exsiccant briquette that contains powdered iron powder and oil content, it is characterized in that the brittle molded body of the continuous shape agglomeration of the grinding smear metal that contains Ferrious material that compression molding is obtained is soaked the curing auxiliary that contains inanimate matter and is cured.
For this briquette, owing to be the exsiccant solids, even it is intactly dropped in the blast furnace, the also danger that does not produce bumping and dance in the air, simultaneously, processing such as carrying, storage become easy.In addition, owing to contain oil content, so prevented the oxidation of powdered pure iron.Utilize again thereby can be used as high-quality steelmaking feed, when helping environment protection, can cut down the obsolescence cost of grinding smear metal.In this use as steelmaking material briquette, the curing auxiliary of inanimate matter is preferably selected at least a from colloidal silica, water glass, aluminum phosphate, thus, although contain oil content but still become firm cured article.Processing such as therefore carrying, storage become easier.
The briquette of above-mentioned each use as steelmaking material preferably contains the curing auxiliary of 2～30 weight %.Thus, become firmer cured article, therefore, processing such as carrying, storage become easier.
The briquette of above-mentioned each use as steelmaking material is pillow roughly preferably, in this case, can improve compressive strength, also is difficult to produce the breakage of part simultaneously.Therefore, processing such as carrying, storage become easier.
The manufacture method of the briquette of use as steelmaking material of the present invention contains each following operation successively: compression molding comprises the grinding smear metal of Ferrious material and contains oil content and the continuous shape agglomeration of the grinding fluid of moisture, the fibrous grinding smear metal of rough cut and remove remaining moisture and oil content obtains the operation of brittle molded body; Pulverize above-mentioned brittle molded body and more fine cut off the grinding smear metal, it is mixed the operation of the powder that obtains containing this curing auxiliary with the curing auxiliary; By the above-mentioned powder compression molding of specified amount being cured and obtaining the operation of briquette; The operation of dry this briquette.
According to the manufacture method of the use as steelmaking material briquette of such formation, the compression molding rough cut easily by above-mentioned continuous shape agglomeration was difficult to the fibrous grinding smear metal cut off in the past.In addition, in pulverizing the operation of brittle molded body since by above-mentioned compression molding rough cut in advance the fibrous grinding smear metal in the brittle molded body, so can be easily and cut off this grinding smear metal effectively.Therefore can be easily and obtain trickle powder reliably.And; just can just can carry out the curing of desired intensity by a compression molding powder with the curing auxiliary in the above-mentioned powder; have again; because above-mentioned each operation is to carry out under the state of oil content contained in remaining on grinding fluid; so can prevent as the pure iron of the composition of grinding smear metal oxidized; thereby can utilize continuous shape agglomeration again as high-quality steelmaking feed, when helping environment protection, can cut down the obsolescence cost of grinding smear metal.
Curing auxiliary as the manufacture method of the briquette that is used for above-mentioned use as steelmaking material, preferably use from rice bran, waste molasses, starch based, unslaked lime, colloidal silica, water glass, phosphorus aluminium, that selects among vinyl acetate between to for plastic mud, asphalt emulsion, the wilkinite is at least a, thus, can be easily and firmly solidify the powder of oily sub.Therefore, can obtain carrying, storage etc. and handle easy use as steelmaking material briquette.
In the manufacture method of above-mentioned use as steelmaking material briquette, preferably mix the curing auxiliary of 2～30 weight %, thus, can more firmly solidify powder.Therefore, can obtain carrying, storage etc. and handle easier use as steelmaking material briquette.
The manufacture method of the briquette of another kind of steel-making usefulness of the present invention, comprise following operation successively: compression molding comprises the grinding smear metal of Ferrious material and contains oil content and the continuous shape agglomeration of the grinding fluid of moisture, the fibrous grinding smear metal of rough cut and remove remaining moisture and oil content obtains the operation of brittle molded body; In above-mentioned brittle molded body, soak and contain the operation of solidifying auxiliary; Drying is soaked and has been contained the operation of solidifying the above-mentioned brittle molded body of auxiliary.
According to the manufacture method of the use as steelmaking material briquette of such formation, by the above-mentioned continuous shape agglomeration of compression molding, rough cut easily was difficult to the fibrous grinding smear metal cut off in the past.In addition, just can only pressuredly shorten this brittle molded body of shape into and carry out the curing of desirable intensity by soaking the curing auxiliary that is contained in the brittle molded body.Have again, because above-mentioned each operation is to carry out under keeping being contained in the state of the oil content in the grinding fluid, so can prevent oxidation as the pure iron of the composition of grinding smear metal.Thereby, can utilize the continuous shape agglomeration that contains the grinding smear metal again as high-quality steelmaking feed, when helping environment protection, can cut down the obsolescence cost of grinding smear metal.And, just can be cured owing to do not need fine to pulverize continuous shape agglomeration, so can make briquette expeditiously.
The curing auxiliary of manufacture method that is used for the briquette of above-mentioned use as steelmaking material, preferably from silica colloidal, water glass, aluminum phosphate, select at least a, thus, can be easily and the brittle molded body of firmly solidifying oily sub.Therefore, can obtain carrying, storage etc. and handle upward easy steelmaking feed.In this manufacture method, preferably mix the above-mentioned curing auxiliary of 2～30 weight %, thus solidification brittleness molding more firmly.Therefore can obtain carrying, storage etc. and handle upward easier use as steelmaking material briquette.
The manufacture method of the briquette of another kind of use as steelmaking material of the present invention, contain following each operation successively: compressed moulding comprises the grinding smear metal of Ferrious material and contains oil content and the fibrous grinding smear metal of continuous shape agglomeration, rough cut of the grinding fluid of moisture and remove remaining moisture and oil content obtains the operation of brittle molded body; Pulverize above-mentioned brittle molded body and more fine cut off the grinding smear metal, it is mixed the operation that obtains containing this coke and solidify the powder of auxiliary with coke and curing auxiliary; By the above-mentioned powder compression molding of specified amount being obtained the operation of solidified briquette; Make this briquette exsiccant operation.
The manufacture method of the briquette of the use as steelmaking material of Gou Chenging like this by the above-mentioned continuous shape agglomeration of compression molding, can be cut off easily and is difficult to the fibrous grinding smear metal cut off in the past.In addition, in the operation of pulverizing brittle molded body, since by above-mentioned compression molding rough cut in advance the fibrous grinding smear metal in the brittle molded body, so obtain trickle powder easily and reliably, and, because the effect of the coke in the above-mentioned powder etc. only needs the compression molding powder just can obtain the briquette of very firm solidified use as steelmaking material.Have, above-mentioned each operation is to carry out under keeping being contained in the state of the oil content in the grinding fluid again, so can prevent the oxidation as the pure iron of the composition of grinding smear metal.Thereby, can utilize continuous shape agglomeration again as high-quality steelmaking feed.When helping environment protection, can cut down the obsolescence cost of grinding smear metal.And, can obtain containing the high use as steelmaking material briquette of added value as adding the coke of carbon material and reductive agent.
In the manufacture method of the briquette of this use as steelmaking material, in chippy above-mentioned brittle molded body, the dust that also can remix in iron and steel manufacturing process, reclaims.Thus, can solidify above-mentioned dust and utilize again with the grinding smear metal.Thereby when helping environment protection, can cut down the obsolescence cost of dust.
In the manufacture method of the briquette of this use as steelmaking material, preferably mix the above-mentioned dust that accounts for weight 10～30%, thus, can obtain the briquette of desirable hardness.In addition, for above-mentioned curing auxiliary, preferably from rice bran, waste molasses, starch based, unslaked lime, colloidal silica, water glass, aluminum phosphate, vinyl acetate between to for plastic mud, asphalt emulsion, wilkinite, select at least a.Thus, can be easily and stably solidify the powder of oily sub, have again, preferably mix the above-mentioned curing auxiliary of 1～10 weight %, can be more prone to thus and stably solidify powder.In addition, preferably 5～50% of mixed weight above-mentioned coke thus, can obtain the briquette of firmer solidified use as steelmaking material.
In the manufacture method of the briquette of above-mentioned each use as steelmaking material, the water ratio of preferably adjusting above-mentioned continuous shape agglomeration respectively is to being no more than 50 weight %, oil length to 10% using of being no more than weight.Thus, the processing such as carrying of above-mentioned continuous shape agglomeration become easily, simultaneously.Can be easily and only suitably remove the residual moisture and the oil content of the brittle molded body that obtains by compression molding.
In the manufacture method of the briquette of above-mentioned each use as steelmaking material, preferably the water ratio of above-mentioned brittle molded body to be adjusted to and accounted for 2～12 weight %, oil length is adjusted to and is accounted for 1～5 weight %.In this case, can be cured to suitable hardness to brittle molded body, use minimal residual oil content simultaneously, can prevent the oxidation of grinding smear metal effectively.
In the manufacture method of the briquette of above-mentioned each use as steelmaking material, the best briquette quick cooling of quick cooling after to above-mentioned compression molding promptly.Thus, can be easily and stably solidify this briquette.
In the manufacture method of the briquette of above-mentioned each use as steelmaking material, as above-mentioned briquette, preferably roughly become pillow, in this case, can obtain carrying that compressive strength is difficult to produce the part breakage by force simultaneously, storage etc. and handle easier use as steelmaking material briquette.
In the manufacture method of the briquette of above-mentioned each use as steelmaking material, as above-mentioned grinding smear metal, also can use the above person of carbon content 0.2 weight %,, also can get rid of the influence of this bounce and firmly curing even for the continuous shape agglomeration that contains the big grinding smear metal of such bounce.
[Brief Description Of Drawings]
Fig. 1 is that stereographic map is blocked in the part of an embodiment of expression use as steelmaking material briquette of the present invention.
Fig. 2 is the process picture sheet of another embodiment of the manufacture method of expression use as steelmaking material briquette of the present invention.
Fig. 3 is the process picture sheet of another embodiment of the manufacture method of expression use as steelmaking material briquette of the present invention.
Fig. 4 is the process picture sheet of another embodiment of the manufacture method of expression use as steelmaking material briquette of the present invention.
[embodiment]
Fig. 1 is that stereographic map is blocked in the part of the use as steelmaking material briquette of expression one embodiment of the invention, this briquette A contains powdered pure iron and oil content, be that the fine cut-out of continuous shape agglomeration that the grinding smear metal of Ferrious material and the grinding fluid that contains oil content and moisture are formed is obtained powder, with the curing auxiliary it is solidified, be dried again and remove above-mentioned moisture and obtain.The shape of this briquette A is made roughly pillow.
Fig. 2 is the process picture sheet of the manufacture method of the above-mentioned briquette A of expression.In the manufacturing of this briquette A, the continuous shape agglomeration B (with reference to Fig. 2 (a)) of the grinding smear metal that produces during pressurization compression ground finish Ferrious material at first, adjust in advance afterwards be contained among this silk floss shape agglomeration B as the moisture of the composition of grinding fluid and the content of oil content.The pressurization compression of this silk floss shape agglomeration B is for example by carrying out (with reference to Fig. 2 (b)) while using travelling belt 1 to carry to sandwich between a pair roller 2.At this moment continuous shape agglomeration B preferably is adjusted into water ratio and is no more than 50 weight %, and oil length is no more than in the scope of 10 weight %.Like this, processing such as the conveying of continuous shape agglomeration B, storage becomes easy.
Next, the brittle molded body C (with reference to Fig. 2 (c)) that the above-mentioned continuous shape agglomeration B that has adjusted moisture and oil content is obtained by the pressing machine compression molding with shaping die 3.Because this compression molding, the grinding smear metal that is contained in the spiral fiber shape among the continuous shape agglomeration B is slightly disconnected.In addition, after removing remaining moisture and oil content, the water ratio of above-mentioned brittle molded body C is adjusted to accounts for 2～12 weight %, oil length accounts for 1～5 weight %.Thus, minimal residual oil content can prevent effectively that the grinding smear metal is oxidized.In addition, be no more than 50 weight % owing in former process, adjust the water ratio of continuous shape agglomeration B in advance, oil length is no more than 10 weight %, so only just can be easily by compression molding and suitably to adjust containing of the moisture of above-mentioned brittle molded body C and oil content proportional.
Easy to handle shapes such as that above-mentioned brittle molded body C forms is cylindrical, spherical, square column type add the degree that does not crumble when downward procedure is carried that is affixed to simultaneously on intensity.
Next, above-mentioned brittle molded body C is dropped in the blender (perhaps Henshell type blender) 5 with knife mill and pulverizes together with solidifying auxiliary D, above-mentioned knife mill is equipped with revolution sword 4 (with reference to Fig. 2 (d)).Thus, more fine cut off the grinding smear metal of (cutting off fully) fragility body C, the powder E (with reference to Fig. 2 (e)) that can obtain containing straight iron powder and solidify auxiliary D.The major diameter of above-mentioned straight iron powder is about 3～1000 μ m.Owing to when this brittle molded body C pulverizes, cut off fibrous grinding smear metal among this brittle molded body C in advance, so can cut off them fully without barrier.If rough cut is not carried out in the fibrous grinding smear metal among this brittle molded body C, it is very difficult pulverizing them with above-mentioned stirrer 5, can not obtain trickle powder E.
Above-mentioned curing auxiliary D can select among waste molasses, yam starch or the W-Gum class of rice bran (rice bran essence), sugarcane etc., unslaked lime, water glass, aluminum phosphate, vinyl acetate between to for plastic mud, asphalt emulsion, the wilkinite and a kind of or two or morely suitably use.Such curing auxiliary D preferably contains 2～30 weight %, and a large amount of straight iron powder that particularly above-mentioned rice bran and waste molasses can prevent to be contained among the powder E effectively is rotten, and its price is also cheap simultaneously, is fit to very much be curing auxiliary D.In addition, behind the asphalt emulsion mixing, when pitch and water sepn, produce cohesiveness, show intensity.It is pitch that this asphalt emulsion preferably uses negatively charged ion.
Next, by the above-mentioned powder E (with reference to Fig. 2 (f)) of pressing machine compression molding predetermined amount, obtain containing the moisture briquette F of the roughly pillow of a large amount of pure iron with shaping die 6.When this powder E compression molding, by the moisture among above-mentioned curing auxiliary D and the powder E, the straight iron powder that can make attaching oil fat is each other securely in conjunction with also solidifying.Especially water accounts 5～6 weight %, rice bran account for 4 weight % in the powder E that uses, waste molasses accounts for 2 weight % and water accounts 7～15 weight %, when vinyl acetate between to for plastic mud accounts for 2～10 weight %, can obtain firmer curing aqueous briquette F.
Have again, above-mentioned so-called " roughly pillow " is that circumference has fillet, from circumference to the central part thickness shape of thickening gradually, include shapes such as avette, almond shape, rugby shape, owing to be shaped as these shapes, so can obtain being difficult to crumble under compression load, bight etc. partly are difficult to damaged briquette A.
And the moisture briquette F after firm compression molding blows normal temperature or refrigerative air makes it quick cooling (with reference to Fig. 2 (g)).Thus, can be easily and stably solidify this moisture briquette F.By the moisture briquette F of maintenance (drying) and remove its moisture that contains (with reference to Fig. 2 (h)), can obtain the briquette A (with reference to Fig. 2 (i)) of use as steelmaking material afterwards.This maintenance was preferably carried out about 2 days, the moisture that contains with certain removal.
The briquette A that obtains by above method, owing to be the material of the powder E porous matter of having solidified, can be easily and remove the moisture that contains reliably by maintenance, do not worry producing unexpected boiling yet and it is danced in the air and be discharged from even therefore it is intactly dropped into blast furnace.In addition, owing to process under the state of the oil content by keeping a part of grinding fluid always, so prevented the oxidation of pure iron effectively.For example, the briquette A for the continuous shape agglomeration B with the grinding smear metal that contains bearing steel (SUJ-2) makes has been identified the pure iron that contains 84～95 weight %.Thereby the fusing yield rate is up to more than 90%, and can be used as high-quality steelmaking feed provides to steelworks with compensation.And it also is easy carrying and do other processing under solid state.
Fig. 3 is the process picture sheet of the another kind of manufacture method of expression briquette A of the present invention.This manufacture method and manufacture method main difference point shown in Figure 1 are, have omitted the pulverizing process of brittle molded body C.Promptly identical with manufacture method shown in Figure 2 in this manufacture method is to obtain brittle molded body C (with reference to Fig. 3 (a)～(c)) from continuous shape agglomeration B.The water ratio of this brittle molded body C and oil length with obtain by manufacture method shown in Figure 2 identical.
Then, the brittle molded body C that obtains through these operations is soaked contain aqueous curing auxiliary D, soaking of this curing auxiliary D contains, on one side for example be to be infused in (with reference to Fig. 3 (d)) that above-mentioned curing auxiliary D in groove 8 carry out by carrying brittle molded body C to flood on travelling belt 7 on one side.The curing auxiliary D that uses in this manufacture method preferably selects at least a the use from colloidal silica, water glass, aluminum phosphate, these curing auxiliarys D preferably soaks and contains 2-30 weight %.Thus, can be easily and solidification brittleness molding C firmly.
Next, carry out the briquette A (with reference to Fig. 3 (g)) that maintenance (drying) (with reference to Fig. 3 (f)) obtains use as steelmaking material to soaking the brittle molded body C (with reference to Fig. 3 (e)) that has contained above-mentioned curing auxiliary D.When above-mentioned maintenance, also can be blown into normal temperature or refrigerative air come quick cooling they.
By the briquette A that above method obtains, can play the identical effect of briquette A that obtains by manufacture method shown in Figure 1.In addition, manufacture method shown in Figure 3 is owing to having omitted the operation of pulverizing brittle molded body C, so can more effectively make briquette A.
Have again, for the shape of above-mentioned briquette A.Except illustrated cylindrical and, also can be circumferences such as avette, almond shape, rugby shape have fillet from circumference to the central part wall thickness roughly pillow of thickening gradually.
The manufacture method of Fig. 2 and briquette shown in Figure 3, being specially adapted to utilize carbon content is the above grinding smear metal of 0.2 weight % again.Such grinding smear metal bounce is big, solidifies difficulty, and the manufacture method of the application of the invention can be got rid of the influence of this bounce, obtains firm solidified briquette A easily.Have, carbon content is the typical example of the above grinding smear metal of 0.2 weight %, can exemplify out the grinding smear metal of bearing steel again.
Have again, in each above-mentioned embodiment, with pulverize brittle molded body C in mixing cured auxiliary D, also can be divided into different operations to the pulverizing of brittle molded body C and the mixing of solidifying auxiliary D and carry out.
Briquette A of the present invention also can also contain the coke powder, in addition, and the also dust that can also contain the coke powder and in iron and steel manufacturing process, reclaim.
Fig. 4 is the process picture sheet of manufacture method of briquette A of powder of representing also to contain the dust of the powder of above-mentioned coke and collection.In the manufacture method of this briquette A, obtain brittle molded body C from continuous shape agglomeration B and be and manufacture method shown in Figure 2 identical (with reference to Fig. 4 (a)～(c)).The water ratio of this brittle molded body C and oil length also with obtain by manufacture method shown in Figure 2 the same.
Next, above-mentioned brittle molded body C being produced the dust S and the curing auxiliary D that reclaim the back with coke K, in iron and steel manufacturing process drops in the stirrer 4 (or Henschell type stirrer) 5 of being with knife mill (with reference to Fig. 4 (d)).At this moment mix with following ratio: above-mentioned brittle molded body C accounts for the dust S that 50～70 weight %, coke K account for 5～50 weight %, collection and account for 10～30 weight %, solidify auxiliary D accounts for 1～10 weight %.
Thus, (cutting off fully) cut off in the grinding smear metal of brittle molded body C must be thinner, the powder E (with reference to Fig. 4 (e)) that can obtain containing the dust S of pure iron, coke K, collection and solidify auxiliary D.
As above-mentioned curing auxiliary D, identical with embodiment shown in Figure 2, among the waste molasses of rice bran, sugarcane etc., starch based, unslaked lime, colloidal silica, water glass, aluminum phosphate, vinyl acetate between to for plastic mud, asphalt emulsion, wilkinite, select a kind of or two or more uses.The dust S of above-mentioned collection for example uses the iron branch (total iron) that produces in steelmaking process and reclaim to account for the dust of 10～55 weight % in addition.
Later operation is the same with embodiment shown in Figure 2.That is,, obtain containing the briquette F of the roughly pillow of a large amount of pure iron with for example roller-type forming mill or the quantitative above-mentioned dust E of cylinder shape forming mill 6 compressed mouldings (with reference to Fig. 4 (f)).When this powder E compression molding, because above-mentioned coke K, the effect of solidifying the moisture among auxiliary D and the powder E, adhering to greasy straight iron powder each other can be firmly in conjunction with also solidifying, then, briquette F after compressed moulding blows normal temperature or refrigerative air, after making its quick cooling (with reference to Fig. 4 (g)), remove its moisture that contains (with reference to Fig. 4 (h)) by maintenance (drying) briquette F, obtain making the briquette A (with reference to Fig. 4 (i)) that the steel raw material is used.
The briquette A that is obtained by above method is owing to be solidified powder E also, so can be easily and remove the moisture that contains reliably by maintenance.Therefore, do not worry in the blast furnace producing boiling yet and dance in the air and be discharged from even it is intactly dropped into.In addition, owing to process under the state of the oil content by keeping a part of grinding fluid always, so prevented the oxidation of pure iron effectively.And, owing to contain as adding the coke K of carbon material and reductive agent,, have again, owing to be solid, so carrying or to carry out other processing all easy so become the higher product of added value.
Particularly in above-mentioned manufacture method, owing to mixed the coke of 5～50 weight % and the solid auxiliary of 1～10 weight % respectively, so can obtain the briquette A of firmer solidified use as steelmaking material, in addition, because the blending ratio of the dust of above-mentioned collection is 10～30 weight %, so can easily obtain the briquette of desirable hardness.
The manufacture method of above-mentioned briquette A also is specially adapted to utilize the grinding smear metal more than the carbon content 0.2 weight % again.
Have again, in the above-described embodiments, mix the dust S of coke K, collection and solidify auxiliary D in the time of with pulverizing brittle molded body C, but also can divide the mixing of the pulverizing of brittle molded body C and above-mentioned coke K etc. several procedures to carry out.In addition, the also dust S of mixed collection not.
Claims (12)
1. the manufacture method of the briquette of a use as steelmaking material, it is characterized in that, this manufacture method comprises following operation successively: compression molding comprises the grinding smear metal of Ferrious material and contains oil content and the continuous shape agglomeration of the grinding fluid of moisture, the fibrous grinding smear metal of rough cut and remove remaining moisture and oil content obtains the operation of brittle molded body; Pulverize above-mentioned brittle molded body and more fine cut off the grinding smear metal, it is mixed the operation of the powder that obtains containing this curing auxiliary with the curing auxiliary; By the above-mentioned powder compression molding of specified amount being cured and obtaining the operation of briquette; The operation of dry this briquette;
Described curing auxiliary uses select at least a from rice bran, waste molasses, starch based, unslaked lime, colloidal silica, water glass, aluminum phosphate, vinyl acetate between to for plastic mud, asphalt emulsion, wilkinite.
2. the manufacture method of steely iron powder brick as claimed in claim 1 is characterized in that, has mixed the above-mentioned curing auxiliary of 2～30 weight % in the above-mentioned use as steelmaking material briquette.
3. the manufacture method of a use as steelmaking material briquette, it is characterized in that this manufacture method comprises following operation successively: compressed moulding contains the grinding smear metal of Ferrious material and comprises oil content and the fibrous grinding smear metal of continuous shape agglomeration, rough cut of the grinding fluid of moisture and remove remaining moisture and oil content obtains the operation of brittle molded body; Pulverize above-mentioned brittle molded body and more fine cut off the grinding smear metal, it is mixed the operation that obtains containing this coke and solidify the powder of auxiliary with coke and curing auxiliary; By the above-mentioned powder compression molding of specified amount being obtained the operation of solidified briquette; Make this briquette exsiccant operation;
Described curing auxiliary is select from rice bran, waste molasses, starch based, unslaked lime, colloidal silica, water glass, aluminum phosphate, vinyl acetate between to for plastic mud, asphalt emulsion, wilkinite at least a.
4. the manufacture method of use as steelmaking material briquette as claimed in claim 3 is characterized in that, sneaks into the dust that reclaims in the iron and steel manufacturing process again in chippy above-mentioned brittle molded body.
5. the manufacture method of use as steelmaking material briquette as claimed in claim 4 is characterized in that, mixes the above-mentioned dust that accounts for 10～30 weight % in the above-mentioned use as steelmaking material briquette.
6. the manufacture method of use as steelmaking material briquette as claimed in claim 3 is characterized in that, mixes the above-mentioned curing auxiliary of 1～10 weight % in the above-mentioned use as steelmaking material briquette.
7. the manufacture method of use as steelmaking material briquette as claimed in claim 3 is characterized in that, mixes the above-mentioned coke of 5～50 weight % in the above-mentioned use as steelmaking material briquette.
8. as the manufacture method of claim 1 or 3 described use as steelmaking material briquettes, it is characterized in that above-mentioned continuous shape agglomeration is adjusted to water ratio respectively and is no more than 50 weight %, oil length is no more than 10 weight % and uses.
9. as the manufacture method of claim 1 or 3 described use as steelmaking material briquettes, it is characterized in that the water ratio of above-mentioned brittle molded body is adjusted to accounted for 2～12 weight %, oil length accounts for 1～5 weight %.
10. as the manufacture method of claim 1 or 3 described use as steelmaking material briquettes, it is characterized in that quick cooling briquette after above-mentioned compression molding promptly.
11. the manufacture method as claim 1 or 3 described use as steelmaking material briquettes is characterized in that, above-mentioned briquette roughly is a pillow.
12. the manufacture method as claim 1 or 3 described use as steelmaking material briquettes is characterized in that, the above smear metal of carbon content 0.2 weight % is used in above-mentioned grinding smear metal.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000243458 | 2000-08-10 | ||
| JP243458/2000 | 2000-08-10 | ||
| JP243468/2000 | 2000-08-10 | ||
| JP243467/2000 | 2000-08-10 | ||
| JP310747/2000 | 2000-10-11 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB018023541A Division CN1265000C (en) | 2000-08-10 | 2001-08-09 | Briquette as material for steel making and method for production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1891838A true CN1891838A (en) | 2007-01-10 |
Family
ID=37597031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100844886A Pending CN1891838A (en) | 2000-08-10 | 2001-08-09 | A briquette for use as steelmaking material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1891838A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101784683B (en) * | 2007-09-18 | 2012-05-09 | 株式会社神户制钢所 | Method for producing briquette with carbonaceous material incorporated therein by use of oil-containing iron-making plant dust |
| CN106082817A (en) * | 2016-06-16 | 2016-11-09 | 阳新鹏富矿业有限公司 | Brick making process for treating solid waste or hazardous waste |
-
2001
- 2001-08-09 CN CNA2006100844886A patent/CN1891838A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101784683B (en) * | 2007-09-18 | 2012-05-09 | 株式会社神户制钢所 | Method for producing briquette with carbonaceous material incorporated therein by use of oil-containing iron-making plant dust |
| CN106082817A (en) * | 2016-06-16 | 2016-11-09 | 阳新鹏富矿业有限公司 | Brick making process for treating solid waste or hazardous waste |
| CN106082817B (en) * | 2016-06-16 | 2018-09-04 | 阳新鹏富矿业有限公司 | Brick making process for treating solid waste or hazardous waste |
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