CN1392223A - Coke modifying process - Google Patents

Coke modifying process Download PDF

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CN1392223A
CN1392223A CN 02113708 CN02113708A CN1392223A CN 1392223 A CN1392223 A CN 1392223A CN 02113708 CN02113708 CN 02113708 CN 02113708 A CN02113708 A CN 02113708A CN 1392223 A CN1392223 A CN 1392223A
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coke
additive
solution
quenching
boric acid
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CN1321168C (en
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朱子宗
沈勇玲
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Chongqing University
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Chongqing University
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Abstract

The present invention relates to the technological process of coal coke. The technological scheme of the present invention includes compounding additive and spray liquid and controlling the concentration and spraying time of the spray liquid. The presnet invention can reduce the reaction property of coke, raise, post-strength of coke including breaking resistance and reduce wear resistance. The modified coke is used widely in iron smelting in blast furnace to reduce pulverization of coke inside blast furnace and reduce coke consumption.

Description

Coke modifying process
Technical field:
The present invention relates to the modified technique behind the coal coking.Coke after the modification is mainly used in blast furnace ironmaking and castingization iron.By the modification of coke, can significantly improve indexs such as coke reactivity, postreaction strength of coke, shatter strength and abrasive wear resistance.
Background technology:
In metallurgical system composition optimizes process, the breach of ironmaking system (iron-Jiao-burning) is to be the use of the strengthening smelting technology of representative with blast furnace big coal injection etc.Because injecting coal quantity increases, coke ratio reduces significantly, and the load of coke in stove increases the weight of, coke is partly or entirely replaced by coal dust as the effect of heat-generating agent, yet as skeleton, keep the effect of interior ventilation property of stove and liquid permeability not only can't be replaced by coal dust, and more important.The blast furnace anatomical documentation shows both at home and abroad: coke is little in top cold zone change of shape, behind the restoration of lower stack owing to be subjected to elevated temperature heat stress, the effect of gasification corrosion, basic metal etc., intensity reduces, granularity diminishes, powder increases, this has just weakened the skeleton and the supporting role of coke, cause blast furnace to have some setbacks, hanging often occurs, collapse phenomenons such as material, influence ordinary production.For guaranteeing the blast furnace permeability of stock column, not only require coke that high cold strength is arranged, more require to have good hot performances such as high hot strength, anti-corrosion ability.And the coke quality (except that minority producers such as Baosteel, Ma Gang) of each big steel factory of China is poor at present, and intensity is low, ash content is high, has a strong impact on the productive capacity of injecting coal quantity and blast furnace.At this situation, the performance of how improving into oven coke seems more and more important.
Summary of the invention:
At the general relatively poor problem of China's metallurgy industry coke quality, the invention provides a kind of coke modifying process.This technology can reduce coke reactivity, improve post-reaction strength, can improve shatter strength simultaneously and reduce abrasive wear resistance.Because coke quality improves, and can reduce the efflorescence of coke in blast furnace, keep smooth operation of furnace, reach energy saving purposes.In order to realize the foregoing invention purpose, technical solution of the present invention is: 1, press component and weight percent additive preparation additive: 100%, and wherein: (1) additive is the mixture of boric acid, boron oxide and titanium dioxide.Wherein titanium dioxide 1%～5%, boron oxide 10%～25%, boric acid 70%～89%; Or (2) additive is the mixture of boric acid and boron oxide.Wherein boron oxide 10%～30%, boric acid 70%～90%; Or (3) additive is a boric acid.2, preparation flushing liquor
In water temperature is to add additive in 1 ℃～99 ℃ coke quenching water or the clear water, stirs then, and stirring velocity is controlled at 10～75 rev/mins, and making its concentration is 0.1%～10.0%.3, when quenching or coke sprayed additive solution 1～5 minute before going into blast furnace.The present invention has following technique effect:
Additive can significantly reduce the reactivity of coke, the intensity behind the raising coke gasification reaction, improves the shatter strength of coke and reduces abrasive wear resistance.
Under laboratory condition, utilize the forward and backward experimental result (carrying out with reference to the GB/T4000-1996 standard) of peace steel coke sprinkling additive solution as follows: (1) coke reactivity (CRI) is measured the cold conditions coke and is sprayed the reactive measurement result table of 1 minute style of additive solution 1-1
The coke kind Go into stove weight/g Reaction back weight/g Weightlessness/g ????CRI ????/％
The burnt 0# in blast furnace storehouse ????200 ????149.1 ????50.9 ????25.45
The burnt 1-1# in blast furnace storehouse ????200 ????154.2 ????45.8 ????22.90
The burnt 1-2# in blast furnace storehouse ????200 ????155.8 ????44.2 ????22.10
The burnt 1-3# in blast furnace storehouse ????200 ????156.9 ????43.1 ????21.55
The burnt 1-4# in blast furnace storehouse ????200 ????158.7 ????41.3 ????20.65
The burnt 1-5# in blast furnace storehouse ????200 ????161.2 ????38.8 ????19.40
The burnt 0# of coke screening station ????200 ????152.5 ????47.5 ????23.75
The burnt 1-1# of coke screening station ????200 ????157.0 ????43.0 ????21.00
The burnt 1-2# of coke screening station ????200 ????158.5 ????41.5 ????20.75
The burnt 1-3# of coke screening station ????200 ????160.3 ????39.7 ????19.85
The burnt 1-4# of coke screening station ????200 ????161.4 ????38.6 ????19.30
The burnt 1-5# of coke screening station ????200 ????162.1 ????37.9 ????18.95
Remarks: 0# is blank sample; It is 1%, 2%, 3%, 4%, 5% that 1#, 2#, 3#, 4#, 5# represent additive solution concentration respectively, and spraying time was represented 1 minute in 1 of its front.It is identical that other respectively shows implication.
The cold conditions coke sprays the reactive measurement result table of 2 minutes style of additive solution 1-2
The coke kind Go into stove weight/g Reaction back weight/g Weightlessness/g ????CRI ????/％
The burnt 0# in blast furnace storehouse ????200 ????149.1 ????50.9 ????25.45
The burnt 2-1# in blast furnace storehouse ????200 ????155.0 ????45.0 ????22.50
The burnt 2-2# in blast furnace storehouse ????200 ????156.6 ????43.4 ????21.70
The burnt 2-3# in blast furnace storehouse ????200 ????158.1 ????41.9 ????20.95
The burnt 2-4# in blast furnace storehouse ????200 ????160.0 ????40.0 ????20.00
The burnt 2-5# in blast furnace storehouse ????200 ????163.4 ????36.6 ????18.30
The burnt 0# of coke screening station ????200 ????152.5 ????47.5 ????23.75
The burnt 2-1# of coke screening station ????200 ????157.4 ????42.6 ????21.30
The burnt 2-2# of coke screening station ????200 ????159.0 ????41.0 ????20.50
The burnt 2-3# of coke screening station ????200 ????161.0 ????39.0 ????19.50
The burnt 2-4# of coke screening station ????200 ????162.1 ????37.9 ????18.95
The burnt 2-5# of coke screening station ????200 ????163.5 ????36.5 ????18.25
The cold conditions coke sprays the reactive measurement result table of 3 minutes style of additive solution 1-3
The coke kind Go into stove weight/g Reaction back weight/g Weightlessness/g ????CRI ????/％
The burnt 0# in blast furnace storehouse ????200 ????149.1 ????50.9 ????25.45
The burnt 3-1# in blast furnace storehouse ????200 ????155.7 ????44.3 ????22.15???
The burnt 3-2# in blast furnace storehouse ????200 ????157.3 ????42.7 ????21.35
The burnt 3-3# in blast furnace storehouse ????200 ????158.6 ????41.4 ????20.70
The burnt 3-4# in blast furnace storehouse ????200 ????161.2 ????38.8 ????19.40
The burnt 3-5# in blast furnace storehouse ????200 ????163.7 ????36.3 ????18.15
The burnt 0# of coke screening station ????200 ????152.5 ????47.5 ????23.75
The burnt 3-1# of coke screening station ????200 ????158.0 ????42.0 ????21.20
The burnt 3-2# of coke screening station ????200 ????159.2 ????40.8 ????20.40
The burnt 3-3# of coke screening station ????200 ????161.8 ????38.2 ????19.10
The burnt 3-4# of coke screening station ????200 ????163.0 ????37.0 ????18.50
The burnt 3-5# of coke screening station ????200 ????163.6 ????36.4 ????18.20
The cold conditions coke soaks the reactive measurement result table of 5 minutes, 10 minutes style of additive solution 1-4
The coke kind Go into stove weight/g Reaction back weight/g Weightlessness/g ????CRI ????/％
The burnt 0# in blast furnace storehouse ????200 ????149.1 ????50.9 ????25.45
Blast furnace storehouse Jiao (1% soaks 5) ????200 ????157.3 ????42.7 ????21.35
Blast furnace storehouse Jiao (2% soaks 5) ????200 ????158.4 ????41.6 ????20.80
Blast furnace storehouse Jiao (3% soaks 5) ????200 ????159.5 ????40.5 ????20.25
Blast furnace storehouse Jiao (4% soaks 5) ????200 ????162.7 ????37.3 ????18.65
Blast furnace storehouse Jiao (5% soaks 5) ????200 ????164.3 ????35.7 ????17.85
Blast furnace storehouse Jiao (5% soaks 10) ????200 ????166.2 ????33.8 ????16.90
The burnt 0# of coke screening station ????200 ????152.5 ????47.5 ????23.75
Coke screening station Jiao (1% soaks 5) ????200 ????157.9 ????42.1 ????21.05
Coke screening station Jiao (2% soaks 5) ????200 ????159.7 ????40.3 ????20.15
Coke screening station Jiao (3% soaks 5) ????200 ????162.6 ????37.4 ????18.70
Coke screening station Jiao (4% soaks 5) ????200 ????163.5 ????36.5 ????18.25
Coke screening station Jiao (5% soaks 5) ????200 ????164.2 ????35.8 ????17.90
Coke screening station Jiao (5% soaks 10) ????200 ????169.0 ????31.0 ????15.50
Annotate: 0# represents blank sample; Wherein: 1% soaks 5-, and to represent additive concentration be 1%, and soak time is 5 minutes; Other implication is identical.(2) postreaction strength of coke (CSR) is measured
The cold conditions coke sprays 1 minute style post-reaction strength measurement result table 2-1 of additive solution
The coke kind Go into bulging weight/g ＞15mm ????/g ＞10mm ????/g ＞5mm ??/g ＜5mm ??/g ???CSR ???/％
The burnt 0# in blast furnace storehouse ??149.1 ?82.3 ?98.5 ?101.7 ?47.4 ?66.06
The burnt 1-1# in blast furnace storehouse ??154.2 ?87.0 ?103.7 ?111.3 ?42.9 ?67.25
The burnt 1-2# in blast furnace storehouse ??155.8 ?89.1 ?105.0 ?115.0 ?40.8 ?67.39
The burnt 1-3# in blast furnace storehouse ??156.9 ?89.5 ?106.4 ?118.3 ?38.6 ?67.82
The burnt 1-4# in blast furnace storehouse ??158.7 ?90.2 ?110.1 ?120.5 ?38.2 ?69.38
The burnt 1-5# in blast furnace storehouse ??161.2 ?92.6 ?112.8 ?119.6 ?41.6 ?69.97
The burnt 0# of coke screening station ??152.5 ?77.4 ?101.8 ?105.8 ?46.7 ?66.75
The burnt 1-1# of coke screening station ??157.0 ?85.5 ?107.3 ?112.7 ?44.3 ?68.34
The burnt 1-2# of coke screening station ??158.5 ?88.4 ?108.9 ?116.0 ?43.5 ?68.70
The burnt 1-3# of coke screening station ??160.3 ?91.0 ?110.4 ??119.1 ?41.2 ?68.87
The burnt 1-4# of coke screening station ??161.4 ?92.3 ?113.1 ?125.3 ?36.1 ?70.07
The burnt 1-5# of coke screening station ??162.1 ?94.0 ?114.5 ?125.9 ?36.2 ?70.64
The cold conditions coke sprays 2 minutes style post-reaction strength measurement result table 2-2 of additive solution
The coke kind Go into bulging weight/g ＞15mm ????/g ＞10mm ????/g ＞5mm ??/g ＜5mm ???/g ????CSR ????/％
The burnt 0# in blast furnace storehouse ??149.1 ??82.3 ??98.5 ??101.7 ??47.4 ??66.06
The burnt 2-1# in blast furnace storehouse ??155.0 ??86.0 ??104.3 ??110.1 ??44.9 ??67.29
The burnt 2-2# in blast furnace storehouse ??156.6 ??88.2 ??107.0 ??115.3 ??41.3 ??68.32
The burnt 2-3# in blast furnace storehouse ??158.1 ??89.5 ??107.5 ??110.5 ??47.6 ??67.99
The burnt 2-4# in blast furnace storehouse ??160.0 ??92.2 ??110.2 ??109.8 ??50.2 ??68.87
The burnt 2-5# in blast furnace storehouse ??163.4 ??94.4 ??116.5 ??123.0 ??40.4 ??71.29
The burnt 0# of coke screening station ??152.5 ??77.4 ??101.8 ??105.8 ??46.7 ??66.75
The burnt 2-1# of coke screening station ??157.4 ??89.5 ??109.3 ??113.5 ??43.9 ??69.44
The burnt 2-2# of coke screening station ??159.0 ??91.6 ??109.9 ??115.0 ??44.0 ??69.12
The burnt 2-3# of coke screening station ??161.0 ??92.1 ??113.4 ??120.0 ??41.0 ??70.43
The burnt 2-4# of coke screening station ??162.1 ??93.3 ??116.1 ??121.5 ??40.6 ??71.62
The burnt 2-5# of coke screening station ??163.5 ??99.0 ??118.5 ??126.5 ??37.0 ??72.47
The cold conditions coke sprays 3 minutes style post-reaction strength measurement result table 2-3 of additive solution
The coke kind Go into bulging weight/g ＞15mm ????/g ＞10mm ????/g ?＞5mm ???/g ?＜5mm ???/g ??CSR ??/％
The burnt 0# in blast furnace storehouse ???149.1 ??82.3 ??98.5 ??101.7 ??47.4 ??66.06
The burnt 3-1# in blast furnace storehouse ???155.7 ??89.0 ??105.8 ??105.2 ??40.5 ??67.95
The burnt 3-2# in blast furnace storehouse ???157.3 ??91.2 ??108.2 ??107.8 ??49.5 ??68.78
The burnt 3-3# in blast furnace storehouse ???158.6 ??93.1 ??108.5 ??112.4 ??46.2 ??68.41
The burnt 3-4# in blast furnace storehouse ???161.2 ??95.4 ??112.2 ??115.1 ??46.1 ??69.48
The burnt 3-5# in blast furnace storehouse ???163.7 ??96.2 ??115.5 ??126.5 ??37.2 ??70.56
The burnt 0# of coke screening station ???152.5 ??77.4 ??101.8 ??105.8 ??46.7 ??66.75
The burnt 3-1# of coke screening station ???158.0 ??87.5 ??109.6 ??115.0 ??43.0 ??69.37
The burnt 3-2# of coke screening station ???159.2 ??90.0 ??110.5 ??117.2 ??42.0 ??69.41
The burnt 3-3# of coke screening station ???161.8 ??95.0 ??114.8 ??123.5 ??38.3 ??70.95
The burnt 3-4# of coke screening station ???163.0 ??96.0 ??116.9 ??125.0 ??38.0 ??71.72
The burnt 3-5# of coke screening station ???163.6 ??100.2 ??117.7 ??120.5 ??43.1 ??71.94
The cold conditions coke soaks 5,10 minutes style post-reaction strength measurement result table 2-4 of additive solution
The coke kind Go into bulging weight/g ?＞15mm ????/g ??＞10mm ????/g ?＞5mm ???/g ＜5mm ???/g ???CSR ????/％
The burnt 0# in blast furnace storehouse ?????149.1 ??82.3 ??98.5 ??101.7 ??47.4 ??66.06
Blast furnace storehouse Jiao (1% soaks 5) ?????157.3 ??91.0 ??107.1 ??112.5 ??44.8 ??68.08
Blast furnace storehouse Jiao (2% soaks 5) ?????158.4 ??93.4 ??109.6 ??118.4 ??40.0 ??69.19
Blast furnace storehouse Jiao (3% soaks 5) ?????159.5 ??94.3 ??113.5 ??121.9 ??37.6 ??71.29
Blast furnace storehouse Jiao (4% soaks 5) ?????162.7 ??95.6 ??117.2 ??125.0 ??37.7 ??72.03
Blast furnace storehouse Jiao (5% soaks 5) ?????164.3 ??97.8 ??119.5 ??120.0 ??44.3 ??72.73
Blast furnace storehouse Jiao (5% soaks 10) ?????166.2 ??100.0 ??121.8 ??130.2 ??36.0 ??73.29
The burnt 0# of coke screening station ?????152.5 ??77.4 ??101.8 ??105.8 ??46.7 ??66.75
Coke screening station Jiao (1% soaks 5) ?????157.9 ??93.8 ??110.3 ??120.5 ??37.4 ??69.85
Coke screening station Jiao (2% soaks 5) ?????159.7 ??91.2 ??112.5 ??119.3 ??40.4 ??70.44
Coke screening station Jiao (3% soaks 5) ?????162.6 ??94.1 ??117.1 ??123.6 ??39.0 ??72.01
Coke screening station Jiao (4% soaks 5) ?????163.5 ??95.6 ??118.2 ??127.8 ??35.7 ??72.29
Coke screening station Jiao (5% soaks 5) ?????164.2 ??97.7 ??120.7 ??130.0 ??34.2 ??73.50
Coke screening station Jiao (5% soaks 10) ?????169.0 ??101.4 ??122.3 ??132.5 ??36.5 ??72.37
(3) the test M of shatter strength (M40), abrasive wear resistance (M10) 40, M 10Table with test results 3-1
The coke kind Go into stove weight/kg ??＞40mm ????/kg ???＞25mm ????/kg ??＜10mm ????/kg ?????M 40?????/％ ????M 25????/％ ?????M 10?????/％
?2R-0-1 ????6.00 ????4.96 ????5.46 ????0.49 ????82.67 ???91.00 ?????8.2
?2R-0-2 ????6.00 ????4.77 ????5.29 ????0.53 ????79.50 ???88.17 ?????8.8
?2R-1-1 ????5.95 ????4.83 ????5.38 ????0.46 ????81.18 ???90.42 ?????7.7
?2R-1-2 ????6.05 ????5.02 ????5.42 ????0.43 ????82.98 ???89.59 ?????7.1
?2R-2-1 ????6.00 ????5.1 ????5.48 ????0.40 ????85.00 ???91.33 ?????6.7
?2R-2-2 ????5.80 ????5.14 ????5.29 ????0.43 ????88.62 ???91.21 ?????7.4
2R-0# mean value ??(6.00) ???(4.81) ????(5.38) ??(0.52) ????81.08 ???89.58 ?????8.5
2R-1# mean value ??(6.00) ???(4.93) ????(5.40) ??(0.45) ????82.08 ???90.00 ?????7.4
2R-2# mean value ??(5.90) ???(5.12) ????(5.39) ??(0.42) ????86.78 ???91.27 ?????7.0
2R-1# contrasts difference ????+1.00 ???+0.42 ????-1.1
2R-2# contrasts difference ????+5.70 ??+1.69 ????-1.5
Experiment conclusion: after (1) coke sprayed additive solution, the reactivity of coke was than not spraying the low of additive solution.Along with the increase of additive solution concentration, coke reactivity reduces the more.From showing 1-1～table 1-4 susceptible of proof: blast furnace storehouse Jiao's coke reactivity is after additive solution is handled, and coke reactivity has dropped to 16.90% from 25.45%; Coke screening station Jiao's coke reactivity has dropped to 15.50% from 23.75%.(2) after coke sprayed additive solution, postreaction strength of coke was than the height that does not spray additive solution.Along with the increase of additive solution concentration, it is many more that postreaction strength of coke improves.From showing 2-1～table 2-4 susceptible of proof: blast furnace storehouse Jiao's postreaction strength of coke brings up to 73.29% from 66.06% after additive solution is handled; Coke screening station Jiao's postreaction strength of coke has brought up to 73.50% from 66.75%.(3) after coke sprayed additive solution, M40 was than the height that does not spray additive solution for the coke shatter strength, and abrasive wear resistance M10 is than not spraying the low of additive solution.From showing the 3-1 susceptible of proof: the shatter strength of the relative 2R-0# of shatter strength of 2R-1#, 2R-2# sample improves 1.0,5.7 percentage points respectively.Abrasive wear resistance reduces by 1.1,1.5 percentage points respectively.
Embodiment: 1. quenching process is sprayed additive solution
Embodiment 1:(1) additive preparation: take by weighing weight and account for 1% titanium dioxide, 10% boron oxide, 89% boric acid, grind mixing, be mixed with additive.(2) the preparation flushing liquor is to add above-mentioned additive in 40 ℃～65 ℃ the coke quenching water in water temperature, stirs then, and stirring velocity is controlled at 20～25 rev/mins, and making strength of solution is 0.8%.(3) when coke is come out of the stove, carry out quenching by coke quenching tower spray solution on coke, spraying time was controlled between 1.0～2.5 minutes.(4) coke after the additive solution processing is carried out every performance measurements such as coke reactivity, postreaction strength of coke, shatter strength, abrasive wear resistance (carrying out) with reference to the GB/T4000-1996 standard.
Embodiment 2:(1) additive preparation: take by weighing weight and account for 3% titanium dioxide, 15% boron oxide, 82% boric acid, grind mixing, be mixed with additive.(2) the preparation flushing liquor is to add above-mentioned additive in 45 ℃～75 ℃ the coke quenching water in water temperature, stirs then, and stirring velocity is controlled at 25～30 rev/mins, and making strength of solution is 1.5%.(3) when coke is come out of the stove, carry out quenching by coke quenching tower spray solution on coke, spraying time was controlled at 1.5～2.5 minutes.(4) with example 1.
Embodiment 3:(1) additive preparation: take by weighing weight and account for 5% titanium dioxide, 25% boron oxide, 70% boric acid, grind mixing, be mixed with additive.(2) the preparation flushing liquor is to add above-mentioned additive in 50 ℃～85 ℃ the coke quenching water in water temperature, stirs then, and stirring velocity is controlled at 30～45 rev/mins, and making strength of solution is 3.0%.(3) when coke is come out of the stove, carry out quenching by coke quenching tower spray solution on coke, spraying time was controlled at 1.5～3.0 minutes.(4) with example 1.
Embodiment 4:(1) additive preparation: take by weighing weight and account for 10% boron oxide, 90% boric acid, grind mixing, be mixed with additive.(2) the preparation flushing liquor is to add above-mentioned additive in 25 ℃～60 ℃ the coke quenching water in water temperature, stirs then, and stirring velocity is controlled at 10～25 rev/mins, and making strength of solution is 1.0%.(3) when coke is come out of the stove, carry out quenching by coke quenching tower spray solution on coke, spraying time was controlled at 2～3 minutes.(4) with example 1.Embodiment 5:(1) additive preparation: take by weighing weight and account for 20% boron oxide, 80% boric acid, grind mixing, be mixed with additive.(2) the preparation flushing liquor is to add above-mentioned additive in 45 ℃～70 ℃ the coke quenching water in water temperature, stirs then, and stirring velocity is controlled at 10～25 rev/mins, and making strength of solution is 2.0%.(3) when coke is come out of the stove, carry out quenching by coke quenching tower spray solution on coke, spraying time was controlled at 1.5～2.5 minutes.(4) with example 1.Embodiment 6:(1) additive preparation; Take by weighing weight and account for 30% boron oxide, 70% boric acid, grind mixing, be mixed with additive.(2) the preparation flushing liquor is to add above-mentioned additive in 45 ℃～85 ℃ the coke quenching water in water temperature, stirs then, and stirring velocity is controlled at 10～25 rev/mins, and making strength of solution is 3.0%.(3) when coke is come out of the stove, carry out quenching by coke quenching tower spray solution on coke, spraying time was controlled at 1.5～2.5 minutes.(4) with example 1.2. spray additive solution embodiment 7:(1 on the belt) additive preparation: take by weighing weight and account for 2% titanium dioxide, 18% boron oxide, 80% boric acid, grind mixing, be mixed with additive.(2) the preparation flushing liquor is to add above-mentioned additive in 25 ℃～50 ℃ the water in water temperature, stirs then, and stirring velocity is controlled at 20～25 rev/mins, and making strength of solution is 1.5%.(3) before going out coal airing platform at coke, entering coke bin, go up to coke spray solution 1～1.5 minute at transportation equipment (belt, transport burnt car).(4) with example 1.Embodiment 8:(1) additive preparation: take by weighing weight and account for 20% boron oxide, 80% boric acid, grind mixing, be mixed with additive.(2) the preparation flushing liquor is to add above-mentioned additive in 30 ℃～60 ℃ the water in water temperature, stirs then, and stirring velocity is controlled at 20～25 rev/mins, and making strength of solution is 2.0%.(3), (4) are with example 7.

Claims (9)

1. coke modifying process, it is characterized in that: (1) presses component and weight percent additive preparation additive: 100%, wherein: titanium dioxide 1%～5%, boron oxide 10%～25%, boric acid 70%～89% or boron oxide 10%～30%, boric acid 70%～90% or boric acid; (2) the preparation flushing liquor is to add additive in 1 ℃～99 ℃ coke quenching water or the clear water in water temperature, stirs then, and stirring velocity is controlled at 10～75 rev/mins, and making its concentration is 0.1%～10.0%; (3) when quenching or coke go into the stokehold and sprayed additive solution 1～5 minute.
2. coke modifying process according to claim 1 is characterized in that: (1) presses titanium dioxide 1%, boron oxide 10%, boric acid 89% additive preparation, and grinds mixing; (2) be to add above-mentioned additive in 40 ℃～65 ℃ the coke quenching water in water temperature, and stir that making strength of solution is 0.8% with 20～25 rev/mins stirring velocity; (3) carry out quenching by coke quenching tower spray solution on coke, spraying time was controlled at 1.0～2.5 minutes.
3. coke modifying process according to claim 1 is characterized in that: (1) is mixed with additive by titanium dioxide 3%, boron oxide 15%, boric acid 82%, and grinds mixing; (2) be to add above-mentioned additive in 45 ℃～75 ℃ the coke quenching water in water temperature, and stir that making strength of solution is 1.5% with 25～30 rev/mins stirring velocity; (3) carry out quenching by coke quenching tower spray solution on coke, spraying time was controlled at 1.5～2.5 minutes.
4. coke modifying process according to claim 1 is characterized in that: (1) presses titanium dioxide 5%, boron oxide 25%, boric acid 70% additive preparation, and grinds mixing; (2) be to add above-mentioned additive in 50 ℃～85 ℃ the coke quenching water in water temperature, and stir that making strength of solution is 3.0% with 30～45 rev/mins stirring velocity; (3) spray on coke by coke quenching tower and add solution and carry out quenching, spraying time was controlled at 1.5～3.0 minutes.
5. coke modifying process according to claim 1 is characterized in that: (1) presses boron oxide 10%, boric acid 90% additive preparation, and grinds mixing; (2) be to add above-mentioned additive in 25 ℃～60 ℃ the coke quenching water in water temperature, and stir that making strength of solution is 1.0% with 10～25 rev/mins stirring velocity; (3) carry out quenching by coke quenching tower spray solution on coke, spraying time was controlled at 2～3 minutes.
6. coke modifying process according to claim 1 is characterized in that: (1) presses boron oxide 20%, boric acid 80%, additive preparation, and grind mixing; (2) be to add above-mentioned additive in 45 ℃～70 ℃ the coke quenching water in water temperature, and stir that making strength of solution is 2.0% with 10～25 rev/mins stirring velocity; (3) carry out quenching by coke quenching tower spray solution on coke, spraying time was controlled at 1.5～2.5 minutes.
7. coke modifying process according to claim 1 is characterized in that: (1) presses boron oxide 30%, boric acid 70% additive preparation, and grinds mixing; (2) be to add above-mentioned additive in 45 ℃～85 ℃ the coke quenching water in water temperature, and stir that making strength of solution is 3.0% with 10～25 rev/mins stirring velocity; (3) carry out quenching by coke quenching tower spray solution on coke, spraying time was controlled at 1.5～2.5 minutes.
8. coke modifying process according to claim 1 is characterized in that: (1) presses titanium dioxide 2%, boron oxide 18%, boric acid 80% additive preparation, and grinds mixing; (2) be to add above-mentioned additive in 25 ℃～50 ℃ the water in water temperature, and stir that making strength of solution is 1.5% with 20～25 rev/mins stirring velocity; (3) before going out coal airing platform at coke, entering coke bin, go up to coke spray solution 1～1.5 minute at transportation equipment (belt, transport burnt car).
9. coke modifying process according to claim 1 is characterized in that: (1) presses boron oxide 20%, boric acid 80% additive preparation, and grinds mixing; (2) be to add above-mentioned additive in 30 ℃～60 ℃ the water in water temperature, and stir that making strength of solution is 2.0% with 20～25 rev/mins stirring velocity; (3) before going out coal airing platform at coke, entering coke bin, go up to coke spray solution 1～1.5 minute at transportation equipment (belt, transport burnt car).
CN 02113708 2002-04-30 2002-04-30 Coke modifying process Expired - Fee Related CN1321168C (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102071081B (en) * 2009-11-24 2012-04-25 河北瑞港南洋化工科技有限公司 Passivated coke and preparation method thereof
CN102071084B (en) * 2009-11-24 2012-04-25 河北瑞港南洋化工科技有限公司 Coke passivating agent composition and preparation method thereof
CN102433136A (en) * 2011-08-10 2012-05-02 王长龙 Enhanced environment-friendly type water-quenched coke strength reinforcing agent
CN102433135A (en) * 2011-08-10 2012-05-02 王长龙 Practical environment-friendly type water-quenched coke strength reinforcing agent
CN102453488A (en) * 2011-08-10 2012-05-16 王长龙 Environmental protection type economic formulation of coke strength enhancer of water-quenched coke
CN102786963A (en) * 2012-08-02 2012-11-21 武钢集团昆明钢铁股份有限公司 Method for improving high-temperature metallurgical property of coke
CN103146408A (en) * 2013-03-15 2013-06-12 重庆大学 Composite pulverized coal modifier, modified coal prepared by using composite pulverized coal modifier, and preparation method of modified coal
CN101654634B (en) * 2009-09-09 2013-07-10 重庆汉砧科技有限公司 Coke passivating agent
CN105838474A (en) * 2016-05-31 2016-08-10 无锡伊佩克科技有限公司 Chromium-free coke passivator and method for preparing same
CN111929128A (en) * 2020-07-27 2020-11-13 北京科技大学 Method for reducing gasification reactivity of coke with higher reactivity

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101654634B (en) * 2009-09-09 2013-07-10 重庆汉砧科技有限公司 Coke passivating agent
CN102071084B (en) * 2009-11-24 2012-04-25 河北瑞港南洋化工科技有限公司 Coke passivating agent composition and preparation method thereof
CN102071081B (en) * 2009-11-24 2012-04-25 河北瑞港南洋化工科技有限公司 Passivated coke and preparation method thereof
CN102433136B (en) * 2011-08-10 2014-01-08 王长龙 Enhanced environment-friendly type water-quenched coke strength reinforcing agent
CN102453488A (en) * 2011-08-10 2012-05-16 王长龙 Environmental protection type economic formulation of coke strength enhancer of water-quenched coke
CN102433135A (en) * 2011-08-10 2012-05-02 王长龙 Practical environment-friendly type water-quenched coke strength reinforcing agent
CN102433135B (en) * 2011-08-10 2013-10-30 王长龙 Environment-friendly type water-quenched coke strength reinforcing agent
CN102433136A (en) * 2011-08-10 2012-05-02 王长龙 Enhanced environment-friendly type water-quenched coke strength reinforcing agent
CN102786963A (en) * 2012-08-02 2012-11-21 武钢集团昆明钢铁股份有限公司 Method for improving high-temperature metallurgical property of coke
CN103146408A (en) * 2013-03-15 2013-06-12 重庆大学 Composite pulverized coal modifier, modified coal prepared by using composite pulverized coal modifier, and preparation method of modified coal
CN103146408B (en) * 2013-03-15 2014-12-17 重庆大学 Mill coal composite pulverized coal modifier, modified coal prepared by using mill coal composite pulverized coal modifier, and preparation method of modified coal
CN105838474A (en) * 2016-05-31 2016-08-10 无锡伊佩克科技有限公司 Chromium-free coke passivator and method for preparing same
CN111929128A (en) * 2020-07-27 2020-11-13 北京科技大学 Method for reducing gasification reactivity of coke with higher reactivity

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