CN102658007A - Method for preparing passivation calcium oxide desulfurizer by utilizing carbide slag - Google Patents
Method for preparing passivation calcium oxide desulfurizer by utilizing carbide slag Download PDFInfo
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- CN102658007A CN102658007A CN2012101090487A CN201210109048A CN102658007A CN 102658007 A CN102658007 A CN 102658007A CN 2012101090487 A CN2012101090487 A CN 2012101090487A CN 201210109048 A CN201210109048 A CN 201210109048A CN 102658007 A CN102658007 A CN 102658007A
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- carbide slag
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Abstract
The invention relates to a method for preparing a passivation calcium oxide desulfurizer by utilizing carbide slag, comprising the following steps: uniformly stirring carbide slag, filtering through three-stage vibrating screens, dehydrating by a plate and frame filter press to obtain calcium hydrate with the solid content of 65-75 %; adding a passivator and a reinforcing agent, mixing uniformly with stirring, carrying out extruding granulation to obtain particles with particle size of 0.5-1.5 mm; drying the particles with a chain dryer by using tail gases of a rotary kiln at 250-300 DEG C for 50-70 min, calcining at 1000-1100 DEG C for 50-70 min, and rapidly cooling by a cooler to obtain the product. According to the invention, the industrial waste residue-carbide slag is reasonably utilized, and the pollution of the carbide slag to the environment is avoided; by using the tail gases of the rotary kiln to dry, the waste gases are utilized, the energy consumption is low, and the production cost is low; the produced product has high desulphurization efficiency and short desulphurization time, and can save energy consumption; and the product has the advantages of moisture resistance, high anti-powdering performance, high utilization rate, low ton steel consumption, and long deposited time, and is beneficial for storage and transportation.
Description
Technical field
The present invention relates to a kind of method of utilizing carbide slag production metallurgy particle lime.
Background technology
Carbide slag is in industrial products production processes such as acetylene gas, polyvinyl chloride, polyvinyl alcohol, the sediment (industrial residue) that produces after calcium carbide (CaC2) hydrolysis, and main component is Ca (OH) 2.Produce 1.15 tons of carbide slags after the calcium carbide hydrolysis per ton approximately.The stacking of carbide slag not only takies a large amount of soils, and because of carbide slag is easy to the diffusion of running off, pollutes and stack near the water resource in place, alkalization soil; Long-time stacking also possibly polluted surrounding enviroment because of air-dry ash.Carbide slag belongs to one of trade waste that is difficult to dispose.
Physics and chemical property analysis through to carbide slag can be found out: the CaO content in the carbide slag is very high, can be described as the high-quality calcareous raw material of making clinker.Its granularity is very thin, needs grinding just can satisfy the requirement that clinker is produced hardly.The number average particle diameter of carbide slag: 1.89 μ m; Weight average particle diameter: 9.19 μ m; Area average grain diameter: 5.75 μ m; Meta particle diameter: 8.29 μ m; Specific area: 947.32m2/kg.The specific area of carbide slag is high more, and water imbibition is also high more, and the oven dry difficulty is big more.The subject matter that needs to solve is: carbide slag slurries is effectively dewatered and accurate feed proportioning.
The patent application of existing this respect has " utilizing carbide slag slurries to produce the method for high-performance solid desulfurizing agent " (one Chinese patent application number 200710148467.0); A kind of method of utilizing carbide slag slurries to produce high-performance solid desulfurizing agent is with the carbide slag slurries centrifugation, filters; Press filtration; In the gained filter cake, add drier then and gather grinding aid with efficient anti-caking, pulverize, packing gets final product.Said drier is flyash and/or quick lime, and wherein the addition of flyash is 5-10%; Said grinding aid is triethanolamine and/or ten diethanol sodium sulphate, and wherein the addition of triethanolamine is 0.005-0.01%, and the addition of ten diethanol sodium sulphate is 0.001-0.005%
Summary of the invention
The objective of the invention is to above-mentioned present situation, the carbide slag that utilizes that aim to provide that a kind of technology is simple, production cost is low, reduces environmental pollution is produced the method for passive oxidation calcium desulfurizing agent.
The implementation of the object of the invention does, utilizes carbide slag to produce the method for passive oxidation calcium desulfurizing agent, and concrete steps are following,
(1) carbide slag is stirred, filter through three grades of vibratory sieves, plate and frame type filter-press dewaters to the calcium hydroxide of solid content 65-75%;
(2) in the calcium hydroxide of solid content 65-75%, add the passivator that it measures 6-12%, the reinforcing agent of 2-5%, stirring and evenly mixing, said passivator are calcirm-fluoride or AD powder, and said reinforcing agent is magnesium chloride or sodium chloride;
(3) with the homomixture of step (2), extruder grain becomes the particle of Φ 0.5-1.5mm;
(4) particle is used the chain type dryer, dries 50-70 minute under 250-300 ℃ with the tail gas of rotary kiln, calcines 50-70 minute the cold product that gets of cooling machine speed down in 1000-1100 ℃ of high temperature.
The invention has the beneficial effects as follows:
1, industrial residue-carbide slag is rationally utilized, not only accomplish twice laid, also avoided the pollution of carbide slag environment;
2, utilize the tail gas high temperature calcining down of rotary kiln, exhaust gas utilization, production cost is low;
3, the product desulfuration efficiency of producing is high, desulfurization time is short, but energy efficient;
4, the product of producing is moistureproof, resistance to chalking is high, and utilization rate is high, and loss per ton steel is few; Resting period is long, helps storing, transporting:
5, use industrial residue-carbide slag to be raw material, protected limited mine resources;
6, ratio is with tcrude ore production energy efficient about 30%.
The specific embodiment
The present invention stirs carbide slag, filters through three grades of vibratory sieves, and plate and frame type filter-press dewaters to the calcium hydroxide of solid content 65-75%; Add passivator, reinforcing agent, stirring and evenly mixing, extruder grain become the particle of Φ 0.5-1.5mm; Particle is used the chain type dryer, dries 50-70 minute under 250-300 ℃ with the tail gas of rotary kiln, calcines 50-70 minute the cold product that gets of cooling machine speed down in 1000-1100 ℃ of high temperature.
The lime particle of producing with the present invention detects its CaO content＞80%, CaF content 6-12%, Sio through inspection center of WUHAN Metallurgical Construction Co., Ltd. of MCC Group
2＜5%, S＜0.02%, C＜0.17%, H
2O＜0.5%.Activity degree 350ml.
Moisture 0.5%, impurity (Fe
2O
3, H
2) be not more than 5%.Granularity 5-20mm.
With specific embodiment the present invention is detailed below.
Embodiment 1:
(1) carbide slag is stirred, filter through three grades of vibratory sieves, plate and frame type filter-press dewaters to the calcium hydroxide of solid content 65%;
(2) in the calcium hydroxide of solid content 65%, add it and measure 6% passivator calcirm-fluoride, 2% reinforcing agent magnesium chloride, stirring and evenly mixing;
(3) with the homomixture of step (2), extruder grain becomes the particle of Φ 0.5mm;
(4) particle is used the chain type dryer, dries 50 minutes under 250 ℃ with the tail gas of rotary kiln, calcines 50 minutes the cold product that gets of cooling machine speed down in 1000 ℃ of high temperature.
Embodiment 2:
(1) carbide slag is stirred, filter through three grades of vibratory sieves, plate and frame type filter-press dewaters to the calcium hydroxide of solid content 68%;
(2) in the calcium hydroxide of solid content 68%, add it and measure 7% passivator calcirm-fluoride, 3% reinforcing agent sodium chloride, stirring and evenly mixing;
(3) with the homomixture of step (2), extruder grain becomes the particle of Φ 0.8mm;
(4) particle is used the chain type dryer, dries 55 minutes under 260 ℃ with the tail gas of rotary kiln, calcines 56 minutes the cold product that gets of cooling machine speed down in 1050 ℃ of high temperature.
Embodiment 3:
(1) carbide slag is stirred, filter through three grades of vibratory sieves, plate and frame type filter-press dewaters to the calcium hydroxide of solid content 72%;
(2) in the calcium hydroxide of solid content 72%, add it and measure 10% passivator AD powder, 4% reinforcing agent magnesium chloride, stirring and evenly mixing;
(3) with the homomixture of step (2), extruder grain becomes the particle of Φ 1.2mm;
(4) particle is used the chain type dryer, dries 63 minutes under 280 ℃ with the tail gas of rotary kiln, calcines 65 minutes the cold product that gets of cooling machine speed down in 1080 ℃ of high temperature.
Embodiment 4:
(1) carbide slag is stirred, filter through three grades of vibratory sieves, plate and frame type filter-press dewaters to the calcium hydroxide of solid content 75%;
(2) in the calcium hydroxide of solid content 75%, add it and measure 12% passivator calcirm-fluoride, 5% reinforcing agent magnesium chloride, stirring and evenly mixing;
(3) with the homomixture of step (2), extruder grain becomes the particle of Φ 1.5mm;
(4) particle is used the chain type dryer, dries 70 minutes under 300 ℃ with the tail gas of rotary kiln, calcines 70 minutes the cold product that gets of cooling machine speed down in 1100 ℃ of high temperature.
Claims (1)
1. utilize carbide slag to produce the method for passive oxidation calcium desulfurizing agent, it is characterized in that concrete steps are following,
(1) carbide slag is stirred, filter through three grades of vibratory sieves, plate and frame type filter-press dewaters to the calcium hydroxide of solid content 65-75%;
(2) in the calcium hydroxide of solid content 65-75%, add the passivator that it measures 6-12%, the reinforcing agent of 2-5%, stirring and evenly mixing, said passivator are calcirm-fluoride or AD powder, and said reinforcing agent is magnesium chloride or sodium chloride;
(3) with the homomixture of step (2), extruder grain becomes the particle of Φ 0.5-1.5mm;
(4) particle is used the chain type dryer, dries 50-70 minute under 250-300 ℃ with the tail gas of rotary kiln, calcines 50-70 minute the cold product that gets of cooling machine speed down in 1000-1100 ℃ of high temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101090487A CN102658007A (en) | 2012-04-16 | 2012-04-16 | Method for preparing passivation calcium oxide desulfurizer by utilizing carbide slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101090487A CN102658007A (en) | 2012-04-16 | 2012-04-16 | Method for preparing passivation calcium oxide desulfurizer by utilizing carbide slag |
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| CN102658007A true CN102658007A (en) | 2012-09-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104289155A (en) * | 2013-07-19 | 2015-01-21 | 北京思能达节能电气股份有限公司 | Chain belt type granulator for rapid one-step molding of high temperature liquid calcium carbide |
| CN104291335A (en) * | 2013-07-19 | 2015-01-21 | 北京思能达节能电气股份有限公司 | Method for quick one-step molding and waste heat recovery of high temperature liquid calcium carbide by chain belt type pelletizer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1427086A (en) * | 2001-12-21 | 2003-07-02 | 包头文鑫实业有限公司 | High efficiency environmental protection nodulizer and its preparation method |
| CN102225780A (en) * | 2011-04-19 | 2011-10-26 | 上海彭浦冶金辅料有限公司 | High-activity calcium oxide and production method thereof |
-
2012
- 2012-04-16 CN CN2012101090487A patent/CN102658007A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1427086A (en) * | 2001-12-21 | 2003-07-02 | 包头文鑫实业有限公司 | High efficiency environmental protection nodulizer and its preparation method |
| CN102225780A (en) * | 2011-04-19 | 2011-10-26 | 上海彭浦冶金辅料有限公司 | High-activity calcium oxide and production method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104289155A (en) * | 2013-07-19 | 2015-01-21 | 北京思能达节能电气股份有限公司 | Chain belt type granulator for rapid one-step molding of high temperature liquid calcium carbide |
| CN104291335A (en) * | 2013-07-19 | 2015-01-21 | 北京思能达节能电气股份有限公司 | Method for quick one-step molding and waste heat recovery of high temperature liquid calcium carbide by chain belt type pelletizer |
| CN104289155B (en) * | 2013-07-19 | 2016-08-17 | 北京思能达节能电气股份有限公司 | A kind of for the quick one-time formed chain-belt type comminutor of high-temperature liquid state carbide |
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Application publication date: 20120912 |