CN102628099A - Method for forming balls by cooling and solidifying mineral powder by using water glass as bonding agent - Google Patents
Method for forming balls by cooling and solidifying mineral powder by using water glass as bonding agent Download PDFInfo
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Abstract
The invention discloses a method for forming balls by cooling and solidifying mineral powder by using water glass as a bonding agent. The method comprises the following steps of: taking a wet powder ore or a wet concentrate of which the water content is over 2 percent as a raw material, adding a strong alkali into the wet powder ore or the wet concentrate, wherein uniformly mixed strong alkali solution is dispersed on the surface of ore grains, and performing modification; and adding the water glass into the modified wet powder ore or wet concentrate, allowing the water glass to be uniformly distributed on the surface of the wet powder ore or the wet concentrate through mixing and grinding, and briquetting and drying the product to obtain the finished products, i.e. the balls. The method has the advantages of simplified process, cost conservation, reduced energy consumption, reduced carbon emission, harmlessness, environment-friendliness and the like.
Description
Technical field
The present invention relates to the rough handling method of a kind of ore or mineral aggregate, relate in particular to the briquetting method of a kind of ore or mineral aggregate.
Background technology
Under current technical qualification, powdered iron ore, manganese ore powder etc. all need be passed through agglomeration and handled before pyrometallurgical smelting.Agglomeration method mainly contains sintering process, pelletizing method and the group's of pressure method.The pelletizing method is divided roasting pelletizing, hot pressing pelletizing method and cooled agglomerated pellet method again with a pressure method.The cooled agglomerated pellet genealogy of law is carried out agglomeration of fine ore under normal temperature or low temperature, therefore have advantage at aspects such as energy consumption, environmental protection, facility investments.The cooled agglomerated pellet agglomeration is different by the moulding mode, mainly comprises with the balling disc being the pelletizing method of molding device and being the briquetting method of molding device with the pair roller ball press.Wherein with the briquetting method of pair roller ball press moulding to the flexibility of raw material, to the flexibility broad of cakingagent kind and performance, its shortcoming is that the unit processing power is less, generally is applicable to small-scale production.The cooled agglomerated pellet agglomeration generally all need be added cakingagent, and the cakingagent kind is different with addition to be had than big difference because of using for the normal temperature of finished pellet and high-temperature machinery intensity.Because cold fixed agglomeration product do not pass through pyroprocessing, remain " rawore ", so its metallurgical performance be difficult to be improved significantly with improve.
Metallurgical fine ore cooled agglomerated pellets such as powdered iron ore, manganese ore powder, ilmenite powder are used cakingagent, through overtesting or obtain industrial application mainly contain ordinary Portland cement, coal-tar pitch, water glass and Sodium salts humic acids.As their each tool advantages of cooled agglomerated pellet cakingagent, but deficiency is separately arranged also.With the ordinary Portland cement is that the pelletizing that cakingagent prepares contains the CaO height, and breeze does not need drying in the preparation process, and pelletizing normal temperature physical strength is high, and water-fast moisture-resistant is applicable to the smelting of blast furnace, Electric furnace iron and carbon element ferromanganese.But be prone to explosion during pelletizing high temperature, and not being suitable for rich manganese slag etc., to require slag be that tart is smelted.With the coal-tar pitch be the breeze low-temperature concretion pelletizing of cakingagent preparation actual be a kind of carbon-burdened pellet; The interpolation because of cakingagent does not reduce ore grade, and breeze does not need drying in the preparation process, and pelletizing is except that having excellent normal temperature and high-temperature machinery intensity; Also has good autoreduction performance; Water-fast moisture-resistant can be applicable to the pig iron, carbon element ferromanganese and Fu Meng slag melting simultaneously, especially big blast-furnace smelting.But its preparation process is complicated, and environmental protection condition is also not as good as being the cold fixed agglomeration method of cakingagent with silicate cement etc.With the Sodium salts humic acids is that the fine ore cooled agglomerated pellet that cakingagent prepares also is a kind of carbonaceous pelletizing, and breeze also can be without drying in the preparation process.But pelletizing high-temperature machinery intensity is lower, and water-fast anti humility performance is also not good enough, is only applicable to electric furnace or small furnace and smelts.With water glass the breeze cooled agglomerated pellets such as powdered iron ore, manganese ore powder of cakingagent preparation; Have good normal temperature and hot strength; It is less that the preparation process is brought impurity into, and intensity can satisfy big blast-furnace smelting requirement, is a kind ofly to use cooled agglomerated pellet method more widely in China.But because of the basic metal of bringing into is many, water-fast anti humility performance is relatively poor, is used for the rich manganese slag melting of electric furnace and blast furnace, medium and small blast furnace pig iron smelting more, or mining in electric furnace, blast furnace carbon element ferromanganese smelting and big blase furnace cast iron smelting as joining.
What carried out is that the cooled agglomerated pellet method of cakingagent has: 1) fine ore drying-interpolation water glass-mixing-pressure group-drying with water glass; 2) fine ore-interpolation water glass, rosin-mixing-pressure group-drying; 3) fine ore-interpolation water glass, wilkinite or silicon sol-mixing-pressure group-drying; 4) coke powder dehydrates-adds water soluble resin-interpolation water, water glass-mixing-pressure group-drying etc.What these methods had uses on industrial application, and test the overtesting chamber of only carrying out that has.Handled fine ore mainly contains ilmenite concentrate, v-ti magnetite concentrate, powdered iron ore, manganese ore powder, chromite ore fine, coke powder etc.Non-patent literature " the cold solid moulding of coke powder is with the development of binder modification water glass " (Hu Huiping etc.; " chemistry world " 2000 02 phases; PP 348～351) in record: with the modified water glass be sticker dry to constant weight-the cold solid moulding test of 5mm coke powder; Show that the properties-correcting agent Resin A obviously improves the green-ball and the dry bulb intensity of the cold solid moulding pelletizing of coke powder; And confirmed its better formula: the mass ratio of water and water glass is 4: 6, and its total consumption is 16% (accounting for the massfraction of dried coke powder); The Resin A consumption is 0.24% (accounting for the massfraction of dried coke powder).Under this preferable condition; The green-ball of made pelletizing and dry bulb intensity; With almost equal with the green-ball and the dry bulb intensity of the made pelletizing of unmodified water glass (wherein the mass ratio of water and water glass is 3: 7, and its total consumption is 16%), but the water tolerance of the former pelletizing and thermotolerance are significantly improved.Non-patent literature " cold solid forming technique and application thereof " (Liu Guogen etc.; " mineral products comprehensive utilization " December calendar year 2001; PP 6) to have touched upon be the relative merits of the cooled agglomerated pellet method of cakingagent with water glass, thinks that its weak point is that concentrate need be dried to very low moisture content in advance.Chinese patent document " high Ti cold curing pellet " (number of patent application CN93103638.0; Patented claim day 1993.04.03; Publication number CN1091778A, open day 1994.09.07) claim that the present invention adopts low-temperature concretion technology to replace high-temperature concretion technology, produces high Ti cold curing pellet; Use the smart powder of titaniferous amount 33%～40%, granularity-200 order 22%～26%, the moisture content titanium below 2% to be raw material; With addition of mineral binder bond water glass 8% or compound binding agent water glass rosin, through batch mixing, high Ti cold curing pellet is produced in pressure ball and cryodrying.It is thus clear that traditional water glass cooled agglomerated pellet technology must be used pulp.Must build breeze drying plant and consume fuel specially for this reason, increase silicate ratio etc.This comes the meeting complicated technology, increases facility investment; Two can increase energy consumption and production cost, also can increase the pollution to environment simultaneously, especially treat high, the suitable moisture content Gao Shigeng of the group of pressure of briquetting breeze water content very.
As everyone knows, the group's of pressure process can be carried out smoothly, except that possessing other each conditions, compound must contain suitable moisture content, also claims the suitable group of pressure moisture.The fine ore kind is different, and its suitable group of pressure moisture is different, and variation range is percentum to percent tens, twenties, even higher.If a kind of moisture 15% (butt water content of wet breeze that needs briquetting; Down together); It is 1000Kg that treatment capacity is amounted to pulp; With water glass is that cakingagent prepares cooled agglomerated pellet by traditional technology, then at first must this wet-milling ore deposit be dried to very low moisture (being made as 1%), palpus drying and dehydrating 1000 * (15%-1%)=140Kg; In the dry powder ore deposit, add water glass then.The add-on of water glass need make compound reach suitable pressure group's moisture of this fine ore and must satisfy the requirement of strength of finished pellet simultaneously; The suitable pressure group moisture of establishing this fine ore again is 12%, sticker glass is moisture 45.8%, in order to reach the suitable group of pressure moisture, then need add 27.99% water glass, and weight is counted Q=279.9Kg.The group of giving birth to that is suppressed is moisture to be 12%.Then in the pelletizing drying process, need again heat dissipation will the group of giving birth in 12% moisture evaporation fall, the drying and dehydrating amount is counted R=138.2Kg (R=(1000+279.9 * 54.2%) * 12%).Need dehydration 278.2Kg twice dry total.Cakingagent consumption is glutinous big, and energy consumption is high, complex process, and this is to be that cakingagent prepares the cooled agglomerated pellet difficult technique to promote by traditional technology with water glass, especially presses a major reason that is difficult to use in the group at the big fine ore of wet volume capacity.Therefore, research raw material drying-free is that the cooled agglomerated pellet technology of cakingagent is significant to siccative and with water glass.
Summary of the invention
The technical problem that the present invention will solve is the deficiency that overcomes prior art, provide that a kind of work simplification, cost savings, energy consumption reduce, " carbon row " minimizing, environmental protection be the method for the breeze cold bound pellet of sticker with water glass.
For solving the problems of the technologies described above; The technical scheme that the present invention proposes is a kind of method of breeze cold bound pellet; This method be with water cut in the wet-milling ore deposit more than 2% or wet concentrate be raw material; In this wet-milling ore deposit or wet concentrate, add highly basic and (can add strong base solution or highly basic pressed powder; The adding mode of strong base solution can be manual adding or machinery adds), the strong base solution that (the mixing method can be artificial mixed, stirrer mixing etc.) forms behind the mixing is scattered in the ore particle surface, carries out modification; To in the wet-milling ore deposit of modification or wet concentrate, adding water glass, makes water glass be dispersed in said wet-milling ore deposit or wet concentrate surface then, after the group of pressure, drying, make finished pellet again through mixing to grind.
Generally speaking, as long as the actual water cut of raw material wet-milling ore deposit or wet concentrate is no more than 90% of this fine ore or the suitable group of pressure of concentrate moisture content, the group of pressure of all can directly preparing burden.In the method for above-mentioned breeze cold bound pellet, the water cut of said raw material wet-milling ore deposit or wet concentrate can be to treat 50%～90% of the suitable group of pressure of briquetting breeze moisture content.In other words; Raw material wet-milling ore deposit of the present invention or wet concentrate need not to dewater in advance, drying; Need be not low excessively because of coke powder water content after drying as (referring to non-patent literature " the cold solid moulding of coke powder is with the development of binder modification water glass ") in the prior art yet; In order to make compound reach suitable pressure group moisture content, reduce the consumption of water glass simultaneously and commodity water glass is added water and modification, but can directly directly prepare cold bound pellet by process step of the present invention.
The method of above-mentioned breeze cold bound pellet, said highly basic are preferably added with strong base solution or highly basic pressed powder form.The mass percent concentration of said strong base solution is preferably 1%～80% (general concentration is high more, and effect is good more), and its addition is to treat 0.2%～15% of briquetting breeze butt quality.The addition of said highly basic pressed powder is preferably treats 0.1%～10% of briquetting breeze butt quality.The concentration of strong base solution and addition can be according to the purposes of the water cut of wet-milling ore deposit or wet concentrate, kind, pelletizing agglomeration product different and respective change.Said highly basic preferably is meant sodium hydroxide, Pottasium Hydroxide or Lithium Hydroxide MonoHydrate.
The method of above-mentioned breeze cold bound pellet, the modulus of said water glass is preferably M=2.2～3.7, and the proportion of said water glass is preferably 1.318～1.599g/cm
3, the degree Beaume of said water glass is preferably 34.98～54.32 ° of B é, and the addition of said water glass is 1%～23% (more preferably 3%～10%) of treating briquetting breeze butt quality.The addition of water glass and mass concentration can be with the purposes differences of moisture, kind and the pelletizing agglomeration product of wet-milling ore deposit or wet concentrate and respective change.
For make compound have the suitable group of pressure moisture, the agglomeration product strength meets request for utilization, and reduces cost, can adjust and optimize the properties-correcting agent strong base solution and the concentration of add water glass; Promptly when higher and its suitable group of the pressure moisture of the wet-milling ore deposit of treating the pelletizing agglomeration or wet concentrate moisture content is low; Can improve the concentration (until using the highly basic pressed powder) of properties-correcting agent strong base solution and the concentration of water glass, the suitable pressure that makes compound moisture content reach this fine ore is rolled into a ball moisture; And when lower and its suitable group of the pressure moisture of the wet-milling ore deposit of treating the pelletizing agglomeration or wet concentrate moisture content is higher, then can corresponding reduction properties-correcting agent and the concentration of water glass.
The method of above-mentioned breeze cold bound pellet, the evaluation method selecting optimal equipment that said mixing is selected for use are biaxial rneader, post-type mixer, forced stirrer or concrete mixer, and mixing time is preferably 5～25 minutes.
The method of above-mentioned breeze cold bound pellet, the evaluation method selecting optimal equipment that said mixed stone roller is selected for use is wheel roller or damp mill, the mixed stone roller time is preferably 2～20 minutes.
The method of above-mentioned breeze cold bound pellet, the evaluation method selecting optimal equipment that said pressure group selects for use is twin rollers, oil press, rod-extruding machine or cylinder formula balling press, the group's of pressure pressure is preferably 30～1000Kg/cm
2
The method of above-mentioned breeze cold bound pellet, said drying are preferably carried out in baking oven, baking bed or conveyor dryer, and drying temperature preferably is controlled at 100 ℃～300 ℃, is preferably 1h～2h time of drying.
Compared with prior art; The invention has the advantages that: the present invention is the general advantage that the fine ore cooled agglomerated pellet method of cakingagent has common cooled agglomerated pellet technology with water glass, because of finished pellet has good intensity and high temperature metallurgical properties can be widely used in electric furnace, blast-furnace smelting; The more important thing is; Keeping under the suitable situation of finished product pellet strength; Wet-milling of the present invention ore deposit does not need special drying; Can reduce the consumption of cakingagent water glass, can reduce the consumption of cakingagent water glass under the certain situation significantly, this to practice thrift cost, cut down the consumption of energy, reduce investment, expansion cooled agglomerated pellet range of application is significant.From effect; The prepared finished pellet of the present invention can be used for electric furnace, blase furnace cast iron is smelted; Rich manganese slag melting; Ferroalloy smelting and other require to have high-intensity black, non-ferrous metal pyrometallurgy stove into furnace charge, are applicable to the agglomeration of nonmetal powders such as metallurgical breezes such as fine iron ore, manganese ore powder, ilmenite concentrate, v-ti magnetite concentrate, chromite ore fine, non-ferrous metal breeze and coal dust, coke powder.To sum up, adopt pelletizing agglomeration process of the present invention, not only can obviously practice thrift cost, cut down the consumption of energy but also reduce " carbon row ", environmental protection can improve economic benefit of enterprises and social benefit.
Description of drawings
Fig. 1 is the process flow sheet of the method for cold bound pellet among the embodiment of the invention 1 and the embodiment 2.
Embodiment
Below in conjunction with Figure of description and specific embodiment the present invention is further described.
Embodiment 1:
The raw material that present embodiment is selected for use is a kind of TFe of containing 33.45%, Mn 13.69%, P 0.01%, Zn 1.13%, Pb 0.41%, SiO
23.56%, Al
2O
32.39%, the manganese oxide powder of CaO 8.39%, Ig 6.5%; Its size composition is+35 orders 5.82%, 35～60 orders 20.97%, 60～100 orders 25.51%, 100～150 orders 21.15%, 150～200 orders 13.45% ,-200 orders 13.10%; Its water cut is 5.2% (wet basis moisture content), and bulk density is 1.35t/m
3
The method of the cold bound pellet of present embodiment manganese oxide powder as shown in Figure 1 may further comprise the steps:
(1) raw material is prepared: use electronic scales take by weighing above-mentioned water cut be 5.2% wet oxidation manganese ore powder 3.165Kg (in the present embodiment water cut in wet-milling ore deposit be treat the suitable group of pressure of briquetting breeze moisture content 58%); Amount to dry oxidation manganese ore powder 3Kg; Prepare 3 parts of raw material appearance simultaneously, subsequent use;
(2) modification: the sodium hydroxide solution (its mass concentration is 33%) that adds 0g, 30g, 60g in above load weighted 3 parts of wet oxidation manganese ore powder respectively; (incorporation time is that 5min～10min gets final product) makes sodium hydroxide solution be scattered in the ore particle surface behind the mixer stirring and evenly mixing, accomplishes modification;
(3) add cakingagent: (degree Beaume of this water glass is 50.2 ° of B é, and modulus M is 2.4, and proportion is 1.53g/cm respectively to add liquid glass 180g of the same race in above 3 parts of raw material appearance
3), be to replenish tap water 50ml, mixing respectively in the raw material appearance of 0g wherein toward the aqueous sodium hydroxide solution addition;
(4) mix stone roller: the admixtion after the above-mentioned steps (3) is gone into wheel roller mix stone roller, the time is 10min; Make water glass further be scattered in wet oxidation manganese ore powder surface equably, simultaneously to the compound densification;
(5) press group's moulding: will mix each compound behind the stone roller respectively at civilian pair roller briquetting press and with the pressing mold group's of pressure moulding on oil press, the former pelletizing is of a size of 38 * 28 * 21mm pincushion, and latter Φ 25 * 18mm is cylindrical; The group's of pressure pressure is 150Kg/cm
2
(6) drying: in electric drying oven with forced convection, the work in-process after the moulding of the group of pressure are given birth to a drying, drying temperature is 100 ℃～300 ℃, and time of drying, 1h made finished pellet after the drying.
Carry out finished product pelletizer tool intensity detection by industry standard, dropping strength in due order/M meter, ultimate compression strength is by Kg/ ball, detected result is seen table 1, table 2.The result shows; Treating under the condition that the wet breeze water content of briquetting is identical, the group's of pressure moisture is suitable, forming pressure is consistent with the water glass consumption; The pressure group intensity of adding properties-correcting agent is apparently higher than the person that do not add properties-correcting agent, and finished product presses group's intensity to increase with the properties-correcting agent addition.
Roller press briquetting pelletizing detected result under the different N aOH consumption condition among table 1: the embodiment 1
An oil press pressure group detected result under the different N aOH consumption condition among table 2: the embodiment 1
Embodiment 2:
The raw material that present embodiment is selected for use is a kind of TFe of containing 33.45%, Mn 13.69%, P 0.01%, Zn 1.13%, Pb 0.41%, SiO
23.56%, Al
2O
32.39%, the manganese oxide powder of CaO 8.39%, Ig 6.5%; Its size composition is+35 orders 5.82%, 35～60 orders 20.97%, 60～100 orders 25.51%, 100～150 orders 21.15%, 150～200 orders 13.45% ,-200 orders 13.10%; Its water cut is 5.2%, and bulk density is 1.35t/m
3
The method of the cold bound pellet of present embodiment manganese oxide powder as shown in Figure 1 may further comprise the steps:
(1) raw material is prepared: using electronic scales to take by weighing above-mentioned water cut is 5.2% wet oxidation manganese ore powder 3.165Kg, amounts to dry oxidation manganese ore powder 3Kg, prepares 2 parts of raw material appearance simultaneously, subsequent use; Using electronic scales to take by weighing water cut again is 1% dry oxidation manganese ore powder 3.03Kg, amounts to dry oxidation manganese ore powder 3Kg, prepares 2 parts of raw material appearance simultaneously, subsequent use;
(2) modification: as properties-correcting agent, take by weighing 20g analytical pure solid sodium hydroxide respectively with aqueous sodium hydroxide solution, and at room temperature it is dissolved in respectively in 30ml, the 46ml tap water, process the aqueous sodium hydroxide solution of different concns with electronic scales; The aqueous sodium hydroxide solution of two kinds of different concns that prepare is added to respectively in load weighted two parts of wet oxidation manganese ore powder raw material appearance; In other two parts of dry powder ore deposit raw material appearance of getting ready, replenish 158ml, 110ml tap water then respectively, (mixing time is that 2min～10min gets final product) makes sodium hydroxide solution be scattered in the ore particle surface behind the stirrer stirring and evenly mixing, accomplishes modification;
(3) add cakingagent: add liquid glass 150g of the same race, 180g, 240g respectively in above 4 parts of raw material appearance, (degree Beaume of this water glass is 50.2 ° of B é to 240g, and modulus M is 2.4, and proportion is 1.53g/cm
3), the difference mixing;
(4) mix stone roller: the admixtion after the above-mentioned steps (3) is mixed stone roller with wheel roller, and the time is 10min, makes water glass further be scattered in the manganese oxide powder surface equably, simultaneously to the compound densification;
(5) press group's moulding: will mix each discharging group's of the pressure moulding on civilian pair roller ball press and oil pressure press mold machine respectively behind the stone roller, the former pelletizing is of a size of 38 * 28 * 21mm pincushion, and latter Φ 25 * 18mm is cylindrical, the pressure 150Kg/cm of the group of pressure
2
(6) drying: in electric drying oven with forced convection, the work in-process after the moulding of the group of pressure are given birth to a drying, drying temperature is 100 ℃～300 ℃, and time of drying, 1h made finished pellet after the drying.
Carry out finished product pelletizer tool intensity detection by industry standard, dropping strength in due order/1M meter, ultimate compression strength is by Kg/ ball, detected result is seen table 3, table 4.The result is illustrated under the condition that the group's of pressure moisture is suitable, forming method is consistent with forming pressure; Use moisture 5.2% wet-milling ore deposit without drying and add the properties-correcting agent group of pressure of directly preparing burden, the physical strength of finished pellet with through drying and dehydrating to moisture 1% and the finished product that improved the fine ore of the same race of silicate ratio press group quite; Compare the dry powder ore deposit and press group, wet-milling ore deposit interpolation properties-correcting agent pressure group neither need carry out the breeze drying and can reduce the water glass dosage again, has clear superiority.
Pressure group detected result (pair roller) among table 3: the embodiment 2 under the various moisture contents condition
Use water glass to press group's test-results (pressing mold) under the table 4 various moisture contents condition as cakingagent
Embodiment 3:
The raw material that present embodiment is selected for use is a kind of TFe of containing 33.45%, Mn 13.69%, P 0.01%, Zn 1.13%, Pb 0.41%, SiO
23.56%, Al
2O
32.39%, the manganese oxide powder of CaO 8.39%, Ig 6.5%; Its size composition is+35 orders 5.82%, 35～60 orders 20.97%, 60～100 orders 25.51%, 100～150 orders 21.15%, 150～200 orders 13.45% ,-200 orders 13.10%; Its water cut is 5.2% (wet basis moisture content), and bulk density is 1.35t/m
3
The method of the cold bound pellet of present embodiment manganese oxide powder may further comprise the steps:
(1) raw material is prepared: using electronic scales to take by weighing above-mentioned water cut is 5.2% wet oxidation manganese ore powder 3.165Kg, amounts to dry oxidation manganese ore powder 3Kg, prepares 3 parts of raw material appearance simultaneously, subsequent use;
(2) modification: the potassium hydroxide solution (its mass concentration is 33%) that adds 0g, 30g, 60g in above load weighted 3 parts of wet oxidation manganese ore powder respectively; (incorporation time is that 2min～10min gets final product) makes potassium hydroxide solution be scattered in the ore particle surface behind the mixer stirring and evenly mixing, accomplishes modification;
(3) add cakingagent: (degree Beaume of this water glass is 50.2 ° of B é, and modulus M is 2.4, and proportion is 1.53g/cm respectively to add liquid glass 180g of the same race in above 3 parts of raw material appearance
3), be to replenish tap water 50ml, mixing respectively in the raw material appearance of 0g wherein toward the aqueous sodium hydroxide solution addition;
(4) mix stone roller: the admixtion after the above-mentioned steps (3) is gone into wheel roller mix stone roller, the time is 10min; Make water glass further be scattered in wet oxidation manganese ore powder surface equably, simultaneously to the compound densification;
(5) press group's moulding: will mix each compound behind the stone roller respectively at civilian pair roller briquetting press and with the pressing mold group's of pressure moulding on oil press, the former pelletizing is of a size of 38 * 28 * 21mm pincushion, and latter Φ 25 * 18mm is cylindrical;
(6) drying: in electric drying oven with forced convection, the work in-process after the moulding of the group of pressure are given birth to a drying, drying temperature is 100 ℃～300 ℃, and time of drying, 1h made finished pellet after the drying.
Carry out finished product pelletizer tool intensity detection by industry standard, dropping strength in due order/M meter, ultimate compression strength is by Kg/ ball, detected result is seen table 5, table 6.The result shows; Pottasium Hydroxide modified effect and sodium hydroxide basically identical; Treating under the condition that the wet ore deposit of briquetting part water content is identical, the group's of pressure moisture is suitable, forming pressure is consistent with the water glass consumption; The pressure group intensity of adding properties-correcting agent is apparently higher than the person that do not add properties-correcting agent, and finished product presses group's intensity to increase with the properties-correcting agent addition.
Roller press briquetting pelletizing detected result under the different K OH consumption condition among table 5: the embodiment 3
An oil press pressure group detected result under the different K OH consumption condition among table 6: the embodiment 3
Claims (9)
1. one kind is the method for the breeze cold bound pellet of sticker with water glass; It is characterized in that: this method be with water cut in the wet-milling ore deposit more than 2% or wet concentrate be raw material; In this wet-milling ore deposit or wet concentrate, add highly basic, strong base solution is scattered in the ore particle surface behind the mixing, carries out modification; To in the wet-milling ore deposit of modification or wet concentrate, adding water glass, makes water glass be dispersed in said wet-milling ore deposit or wet concentrate surface then, after the group of pressure, drying, make finished pellet again through mixing to grind.
2. the method for breeze cold bound pellet according to claim 1 is characterized in that: the water cut of said raw material wet-milling ore deposit or wet concentrate is to treat 50%～90% of the suitable group of pressure of briquetting breeze moisture content.
3. the method for breeze cold bound pellet according to claim 1 and 2 is characterized in that: said highly basic is to add with strong base solution or highly basic pressed powder form;
The mass percent concentration of said strong base solution is 1%～80%, and its addition is to treat 0.2%～15% of briquetting breeze butt quality;
The addition of said highly basic pressed powder is to treat 0.1%～10% of briquetting breeze butt quality.
4. the method for breeze cold bound pellet according to claim 3 is characterized in that: said highly basic is meant sodium hydroxide solution, Pottasium Hydroxide or Lithium Hydroxide MonoHydrate.
5. the method for breeze cold bound pellet according to claim 1 and 2 is characterized in that: the modulus of said water glass is 2.2～3.7, the proportion 1.318～1.599g/cm of said water glass
3, the degree Beaume of said water glass is preferably 34.98～54.32 ° of B é, and the addition of said water glass is to treat 1%～23% of briquetting breeze butt quality.
6. the method for breeze cold bound pellet according to claim 1 and 2 is characterized in that: the equipment that said mixing is selected for use is biaxial rneader, post-type mixer, forced stirrer or concrete mixer, and mixing time is 5～25 minutes.
7. the method for breeze cold bound pellet according to claim 1 and 2 is characterized in that: the equipment that said mixed stone roller is selected for use is wheel roller or damp mill, and mixing the stone roller time is 2～20 minutes.
8. the method for breeze cold bound pellet according to claim 1 and 2 is characterized in that: the equipment that said pressure group selects for use is twin rollers, oil press, rod-extruding machine or cylinder formula balling press, and the group's of pressure pressure is 30～1000Kg/cm
2
9. the method for breeze cold bound pellet according to claim 1 and 2 is characterized in that: said drying is in baking oven, baking bed or conveyor dryer, to carry out, and drying temperature is controlled at 100 ℃～300 ℃, and be 1h～2h time of drying.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105925794A (en) * | 2016-07-13 | 2016-09-07 | 唐山市达泰科技有限公司 | Metallurgical waste material bonding clustering process |
| CN109161681A (en) * | 2018-09-27 | 2019-01-08 | 攀钢集团攀枝花钢铁研究院有限公司 | The preparation method of vanadium slag sodium pelletizing |
| CN113166863A (en) * | 2019-03-25 | 2021-07-23 | 斯拉夫罗斯有限责任公司 | Charge for manufacturing ferrosilicon |
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| CN1033195A (en) * | 1988-11-17 | 1989-05-31 | 山西省稷山炼铁厂 | Cold setting pellets of powdered iron concentrate manufacture method and equipment |
| JPH0353029A (en) * | 1989-07-19 | 1991-03-07 | Yoshikawa Kogyo Co Ltd | Method for recycling steel making dusts in electric furnace having scrap preheating furnace |
| CN1058426A (en) * | 1990-05-04 | 1992-02-05 | 青州水泵厂 | A kind of method of recycling cast silicon iron powder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3053029B2 (en) * | 1991-10-08 | 2000-06-19 | テルモ株式会社 | Vascular dilatation catheter balloon |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1033195A (en) * | 1988-11-17 | 1989-05-31 | 山西省稷山炼铁厂 | Cold setting pellets of powdered iron concentrate manufacture method and equipment |
| JPH0353029A (en) * | 1989-07-19 | 1991-03-07 | Yoshikawa Kogyo Co Ltd | Method for recycling steel making dusts in electric furnace having scrap preheating furnace |
| CN1058426A (en) * | 1990-05-04 | 1992-02-05 | 青州水泵厂 | A kind of method of recycling cast silicon iron powder |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105925794A (en) * | 2016-07-13 | 2016-09-07 | 唐山市达泰科技有限公司 | Metallurgical waste material bonding clustering process |
| CN109161681A (en) * | 2018-09-27 | 2019-01-08 | 攀钢集团攀枝花钢铁研究院有限公司 | The preparation method of vanadium slag sodium pelletizing |
| CN113166863A (en) * | 2019-03-25 | 2021-07-23 | 斯拉夫罗斯有限责任公司 | Charge for manufacturing ferrosilicon |
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| Publication number | Publication date |
|---|---|
| CN102628099B (en) | 2013-10-30 |
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