CN109956683A - A kind of production method of ultralow magnesium silicon activity refined lime - Google Patents
A kind of production method of ultralow magnesium silicon activity refined lime Download PDFInfo
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- CN109956683A CN109956683A CN201711499849.8A CN201711499849A CN109956683A CN 109956683 A CN109956683 A CN 109956683A CN 201711499849 A CN201711499849 A CN 201711499849A CN 109956683 A CN109956683 A CN 109956683A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/104—Ingredients added before or during the burning process
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/108—Treatment or selection of the fuel therefor
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Abstract
The present invention provides a kind of production method of ultralow magnesium silicon activity refined lime, which comprises the following steps: 1) preparation of surfactant；2) pretreatment of raw material；3) it preheats；4) it calcines, ultralow magnesium silicon activity refined lime can be obtained.By controlling broken limestone granularity and addition surfactant, to raw limestone, broken, screening, flotation, washing can effectively remove lime stone silt, sundries, substantially reduce the content of the objectionable impurities such as Mg, Si in raw limestone；Obtained ultralow Mg low-Si activity refined lime not only stablize by quality, and the active calcium ion content is high, activity degree is high, interior porosity is high, reaction speed is fast, the reaction time is short, objectionable impurities elements content is low, specially the efficient oxidation calcium >=92%, activity degree >=400ml, sulfur content≤0.01%, phosphorus content≤0.02%, MgO≤0.5%, SiO2≤0.8%.
Description
Technical field
The invention belongs to chemical industry to smelt field of new materials, and in particular to a kind of ultralow magnesium silicon activity refined lime and its producer
Method.
Background technique
Ultralow magnesium, low silicon activity refined lime are mainly used for the fields such as potash fertilizer production, gold ore, papermaking and smelting iron and steel.
Activity degree height is not required nothing more than, and reaction speed is fast, and the reaction time is short, and requires objectionable impurities elements content low.Impurity element contains
Measure low, lime consumption is few, reduces the discharge of solid waste slag, improves the production rate of potash fertilizer, the ore dressing rate of gold mine, prevents papermaking
The formation of journey free acid, the dosage for reducing slag making materials in smelting iron and steel.The requirement calcium oxide of ultralow magnesium, low silicon activity refined lime
>=92%, activity degree >=350ml, sulfur content≤0.01%, phosphorus content≤0.02%, MgO≤0.5%, SiO2≤0.8%.With
Popularization and application of the country to new technology, new process, new material, using ultralow magnesium, low silicon activity refined lime as the new material of representative
It is used in the application of chemical industry, papermaking, ore dressing, field of smelting more and more extensive.
Chinese patent ZL201510231514.2 discloses a kind of production method of active lime, and this method is by lime
The washing of stone raw material, removes silt therein and other sundries and metaling, crushes, sieving；Again by the (dispersion of the additive of preparation
Agent, coupling agent and chlorate etc. are several to be uniformly mixed) it is uniformly mixed with raw material limestone addition batch mixer；Secondly by above-mentioned lime
Stone mixture is preheated, and temperature is 680-720 DEG C, preheating time 5-10min；Finally the lime stone by preheating is mixed
Material is sent into rotary kiln kiln body, and the revolving speed of rotary kiln is 2.7-3.2 revs/min, is warming up to 1210-1300 DEG C by spraying using bituminous coal, forges
The burning time is 150-200min.Calcined lime is got product through cooling.Shortcoming: raw material is being crushed, is washing, is being sieving through
Cheng Zhong, objectionable impurities elements (Mg, Si) removal are not thorough；Simultaneously in calcination process calcination temperature, calcination time and kiln revolving speed etc.
Process parameter control is unreasonable, be easy to cause objectionable impurities elements such as Mg, Si equal size height in kiln discharge lime, reduces the life of potash fertilizer
At rate, the ore dressing rate of gold mine, it is difficult to the formation for preventing paper-making process free acid, the dosage for increasing slag making materials in smelting iron and steel.
Summary of the invention
Aiming at the deficiencies in the prior art, the present invention is to reduce objectionable impurities Mg, Si equal size in active lime
Purpose.The present invention not only can be improved active lime activity degree, interior porosity, reaction speed, shorten the reaction time, but also solve
The high problem of objectionable impurities elements content in active lime of having determined.
Technical method of the invention is as follows:
A kind of production method of ultralow magnesium silicon activity refined lime, comprising the following steps:
The preparation of step 1) surfactant；Detergent, flotation agent, dispersant are weighed into homogeneous solution；
Step 2) pretreatment of raw material: lime stone is crushed, flotation, washing, screening；It is obtained by the way that step 1) is added
Surfactant raw material is crushed, flotation, washing, it is miscellaneous to completely remove silt, lime stone clast of raw limestone etc.
Object, while getting rid of part objectionable impurities elements in raw material；
Step 3) preheating: lime stone in step 2) is preheated, and temperature is 680-720 DEG C, preheating time 200-
240min；
Step 4) calcining: the lime stone in step 3) by preheating is sent into rotary kiln kiln body, the revolving speed of rotary kiln is
0.9-1.1 revs/min, it is warming up to 1300-1400 DEG C by spraying using bituminous coal, calcination time 50-70min, in shaft cooler
Kiln discharge lime is rapidly cooled using forced air supply, ultralow magnesium silicon activity refined lime can be obtained.
Further, the step 1) detergent, flotation agent, dispersing agent quality blend proportion be 1: (4-6): 3；；Make
To be preferred, the detergent, flotation agent, dispersing agent quality blend proportion be 1: 5: 3.
Further, detergent is sodium soap in the step 1).
Further, the step 1) flotation agent is fatty acid.
Further, the step 1) dispersing agent is chelated dispersants.
Further, the dosage of the step 2) surfactant is ten thousand/5.0-7.0 of lime stone quality.
Further, the granularity of the raw limestone in the step 2) is 10-30mm.
Preferably, preheating temperature is 700 DEG C in the step 3), preheating time 220min.
Preferably, the revolving speed of rotary kiln is 1.0 revs/min in the step 4), preheating lime stone is sent into rotary kiln
1350 DEG C are warming up in vivo, calcination time 60min.
Further, the step 4) metabituminous coal use sulphur≤0.5wt%, volatile matter >=35wt%, ash content≤8wt%,
Calorific value >=6000J/kg, fineness of pulverized coal≤5wt%, moisture≤1wt%, granularity are 200 mesh.
Further, the ultralow Mg low-Si activity refined lime not only stablize by quality, but also calcium oxide >=92%, activity degree
>=400ml, sulfur content≤0.01%, phosphorus content≤0.02%, MgO≤0.5%, SiO2≤0.8%.
The invention has the following advantages:
1, by controlling broken limestone granularity and addition surfactant broken, screening, flotation, water to raw limestone
Lime stone silt, sundries can effectively be removed by washing, and substantially reduce the content of the objectionable impurities such as Mg, Si in raw limestone；
2,200 mesh coal dusts are worn by using low-sulfur, high volatile, low-ash bituminous coal and is sprayed combustion technology and slow middling speed
Calcination method makes kiln speed control 1.0 revs/min, and not only the active calcium ion content is high, activity degree is high for the active lime of production, reaction speed
Fastly, the reaction time is short, and further decreases the content of the objectionable impurities such as Mg, Si in active lime；
By reducing objectionable impurities elements content in active lime, reduce the active lime dosage using unit, solid
The discharge of castaway slag improves the production rate of potash fertilizer, the ore dressing rate of gold mine, the formation for preventing paper-making process free acid, reduces steel
The dosage of slag making materials in smelting.Popularization and application with country to new technology, new process, new material, it is living with ultralow magnesium, low silicon
Property refined lime be representative new material chemical industry, papermaking, ore dressing, field of smelting application with more and more extensive.
Specific embodiment
The present invention is described below with reference to specific embodiments.It will be appreciated by those skilled in the art that these embodiments are only
For illustrating the present invention, do not limit the scope of the invention in any way.
Embodiment 1
A kind of production method of ultralow magnesium silicon activity refined lime, comprising the following steps:
The preparation of step 1) surfactant: sodium soap, fatty acid that mass ratio is 1: 5: 3, chelating dispersion are weighed
Agent is mixed into homogeneous solution；
Step 2) pretreatment of raw material: being crushed lime stone, flotation, washing, screening, by the way that lime stone quality is added
6.0/10000ths surfactant carries out flotation, washing to raw material, completely removes silt, lime clast of raw limestone etc.
Sundries, while part objectionable impurities elements in raw material are got rid of, and choosing the lime stone that granularity is 20mm is raw material；
Step 3) preheating: lime stone in step 2) is preheated, and preheating temperature is 700 DEG C, preheating time 220min；
Step 4) calcining: the lime stone in step 3) by preheating is sent into rotary kiln kiln body, the revolving speed of rotary kiln is 1.0
Rev/min, it is warming up to 1350 DEG C by spraying using bituminous coal, calcination time 60min；Using forced air supply to out in shaft cooler
Kiln lime is rapidly cooled, and ultralow magnesium silicon activity refined lime can be obtained.
Wherein, step 4) metabituminous coal use sulphur≤0.5wt%, volatile matter >=35wt%, ash content≤8wt%, calorific value >=
6000J/kg, fineness of pulverized coal≤5wt%, moisture≤1wt%, granularity are 200 mesh.
Embodiment 2
The preparation of step 1) surfactant: sodium soap, fatty acid that mass ratio is 1: 6: 3, chelating dispersion are weighed
Agent is mixed into homogeneous solution；
Step 2) pretreatment of raw material: being crushed lime stone, flotation, washing, screening, by the way that lime stone quality is added
7.0/10000ths surfactant carries out flotation, washing to raw material, completely removes silt, lime clast of raw limestone etc.
Sundries, while part objectionable impurities elements in raw material are got rid of, and choosing the lime stone that granularity is 30mm is raw material；
Step 3) preheating: lime stone in step 2) is preheated, and preheating temperature is 720 DEG C, preheating time 240min；
Step 4) calcining: the lime stone in step 3) by preheating is sent into rotary kiln kiln body, the revolving speed of rotary kiln is 1.1
Rev/min, it is warming up to 1400 DEG C by spraying using bituminous coal, calcination time 70min；Using forced air supply to out in shaft cooler
Kiln lime is rapidly cooled, and ultralow magnesium silicon activity refined lime can be obtained.
Wherein, step 4) metabituminous coal use sulphur≤0.5wt%, volatile matter >=35wt%, ash content≤8wt%, calorific value >=
6000J/kg, fineness of pulverized coal≤5wt%, moisture≤1wt%, granularity are 200 mesh.
Embodiment 3
The preparation of step 1) surfactant: sodium soap, fatty acid that mass ratio is 1: 4: 3, chelating dispersion are weighed
Agent is mixed into homogeneous solution；
Step 2) pretreatment of raw material: being crushed lime stone, flotation, washing, screening, by the way that lime stone quality is added
5.0/10000ths surfactant carries out flotation, washing to raw material, completely removes silt, lime clast of raw limestone etc.
Sundries, while part objectionable impurities elements in raw material are got rid of, and choosing the lime stone that granularity is 10mm is raw material；
Step 3) preheating: lime stone in step 2) is preheated, and preheating temperature is 680 DEG C, preheating time 200min；
Step 4) calcining: the lime stone in step 3) by preheating is sent into rotary kiln kiln body, the revolving speed of rotary kiln is 0.9
Rev/min, it is warming up to 1300 DEG C by spraying using bituminous coal, calcination time 50min；Using forced air supply to out in shaft cooler
Kiln lime is rapidly cooled, and ultralow magnesium silicon activity refined lime can be obtained.
Wherein, step 4) metabituminous coal use sulphur≤0.5wt%, volatile matter >=35wt%, ash content≤8wt%, calorific value >=
6000J/kg, fineness of pulverized coal≤5wt%, moisture≤1wt%, granularity are 200 mesh.
Embodiment 4
The preparation of step 1) surfactant: sodium soap, fatty acid that mass ratio is 1: 5: 3, chelating dispersion are weighed
Agent is mixed into homogeneous solution；
Step 2) pretreatment of raw material: being crushed lime stone, flotation, washing, screening, by the way that lime stone quality is added
6.0/10000ths surfactant carries out flotation, washing to raw material, completely removes silt, lime clast of raw limestone etc.
Sundries, while part objectionable impurities elements in raw material are got rid of, and choosing the lime stone that granularity is 20mm is raw material；
Step 3) preheating: lime stone in step 2) is preheated, and preheating temperature is 690 DEG C, preheating time 230min；
Step 4) calcining: the lime stone in step 3) by preheating is sent into rotary kiln kiln body, the revolving speed of rotary kiln is 1.0
Rev/min, it is warming up to 1380 DEG C by spraying using bituminous coal, calcination time 65min；Using forced air supply to out in shaft cooler
Kiln lime is rapidly cooled, and ultralow magnesium silicon activity refined lime can be obtained.
Wherein, step 4) metabituminous coal use sulphur≤0.5wt%, volatile matter >=35wt%, ash content≤8wt%, calorific value >=
6000J/kg, fineness of pulverized coal≤5wt%, moisture≤1wt%, granularity are 200 mesh.
Embodiment 5
The preparation of step 1) surfactant；Weigh the sodium soap, fatty acid, chelating point that mass ratio is 1: 5.5: 3
Powder is mixed into homogeneous solution；
Step 2) pretreatment of raw material: being crushed lime stone, flotation, washing, screening, by the way that lime stone quality is added
4.5/10000ths surfactant carries out flotation, washing to raw material, completely removes silt, lime clast of raw limestone etc.
Sundries, while part objectionable impurities elements in raw material are got rid of, and choosing the lime stone that granularity is 20mm is raw material:
Step 3) preheating: lime stone in step 2) is preheated, and preheating temperature is 710 DEG C, preheating time 210min；
Step 4) calcining: the lime stone in step 3) by preheating is sent into rotary kiln kiln body, the revolving speed of rotary kiln is 1.1
Rev/min, it is warming up to 1330 DEG C by spraying using bituminous coal, calcination time 55min；Using forced air supply to out in shaft cooler
Kiln lime is rapidly cooled, and ultralow magnesium silicon activity refined lime can be obtained.
Wherein, step 4) metabituminous coal use sulphur≤0.5wt%, volatile matter >=35wt%, ash content≤8wt%, calorific value >=
6000J/kg, fineness of pulverized coal≤5wt%, moisture≤1wt%, granularity are 200 mesh.
The raw material physicochemical data of embodiment 1-5 is shown in Table 1, and the Physical testing and chemical analysis data of prepared refined lime is shown in Table 2.
The physicochemical data of 1. lime stone of table
| Title | Calcium oxide | C | S | MgO | SiO2 |
| Unit | Wt% | Wt% | Wt% | Wt% | Wt% |
| Embodiment 1 | 55.50 | 0.10 | 0.08 | 0.13 | 0.28 |
| Embodiment 2 | 55.22 | 0.12 | 0.10 | 0.16 | 0.33 |
| Embodiment 3 | 55.34 | 0.11 | 0.11 | 0.17 | 0.30 |
| Embodiment 4 | 55.02 | 0.11 | 0.10 | 0.15 | 0.32 |
| Embodiment 5 | 54.96 | 0.12 | 0.12 | 0.14 | 0.42 |
The Physical testing and chemical analysis data of refined lime prepared by table 2.
| Detection project | CaO | C | S | Activity degree | MgO | SiO2 |
| Unit | Wt% | Wt% | Wt% | ml | Wt% | Wt% |
| Embodiment 1 | 97.12 | < 0.02 | < 0.01 | 447 | 0.22 | 0.48 |
| Embodiment 2 | 96.63 | < 0.02 | < 0.01 | 440 | 0.28 | 0.58 |
| Embodiment 3 | 96.84 | < 0.02 | < 0.01 | 445 | 0.30 | 0.53 |
| Embodiment 4 | 96.28 | < 0.02 | < 0.01 | 437 | 0.26 | 0.56 |
| Embodiment 5 | 96.18 | < 0.02 | < 0.01 | 431 | 0.25 | 0.74 |
Claims (9)
1. a kind of production method of ultralow magnesium silicon activity refined lime, which comprises the following steps:
The preparation of step 1) surfactant: detergent, flotation agent, dispersant are weighed into homogeneous solution；
Step 2) pretreatment of raw material: lime stone is crushed, flotation, washing, screening；By the way that table obtained by step 1) is added
Face activating agent is crushed raw material, flotation, washing, completely removes the sundries such as silt, the lime stone clast of raw limestone, together
When get rid of part objectionable impurities elements in raw material；
Step 3) preheating: lime stone in step 2) is preheated, and preheating temperature is 680-720 DEG C, preheating time 200-
240min；
Step 4) calcining: the lime stone in step 3) by preheating is sent into rotary kiln kiln body, the revolving speed of rotary kiln is 0.9-1.1
Rev/min, it is warming up to 1300-1400 DEG C, calcination time 50-70min by spraying using bituminous coal, using pressure in shaft cooler
Air-supply is rapidly cooled kiln discharge lime, and ultralow magnesium silicon activity refined lime can be obtained.
2. a kind of production method of ultralow magnesium silicon activity refined lime as described in claim 1, which is characterized in that the washing
Agent, flotation agent, dispersing agent quality blend proportion be 1: (4-6): 3.
3. a kind of production method of ultralow magnesium silicon activity refined lime as described in claim 1, which is characterized in that the step 2)
In raw limestone granularity be 10-30mm.
4. a kind of production method of ultralow magnesium silicon activity refined lime as described in claim 1, which is characterized in that the surface is living
Property agent dosage be lime stone quality ten thousand/5.0-7.0.
5. a kind of production method of ultralow magnesium silicon activity refined lime as described in claim 1, which is characterized in that the detergent
For sodium soap.
6. a kind of production method of ultralow magnesium silicon activity refined lime as described in claim 1, which is characterized in that the flotation agent
For fatty acid.
7. a kind of production method of ultralow magnesium silicon activity refined lime as described in claim 1, which is characterized in that the dispersing agent
For chelated dispersants.
8. a kind of production method of ultralow magnesium silicon activity refined lime as described in claim 1, which is characterized in that the step 4)
Metabituminous coal use sulphur≤0.5wt%, volatile matter >=35wt%, ash content≤8wt%, calorific value >=6000J/kg, fineness of pulverized coal≤
5wt%, moisture≤1wt%, granularity are 200 mesh.
9. a kind of production method of ultralow magnesium silicon activity refined lime as described in claim 1, which is characterized in that the ultralow magnesium
Low silicon activity refined lime not only stablize by quality, but also the active calcium ion content is high, activity degree is high, interior porosity is high, reaction speed is fast,
Reaction time is short, objectionable impurities elements content is low, specially the efficient oxidation calcium >=92%, activity degree >=400ml, sulfur content≤
0.01%, phosphorus content≤0.02%, MgO≤0.5%, SiO2≤0.8%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113998906A (en) * | 2021-11-09 | 2022-02-01 | 湖南皕成科技股份有限公司 | Production method of ultra-low magnesium and low silicon active fine lime |
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| CN113998906A (en) * | 2021-11-09 | 2022-02-01 | 湖南皕成科技股份有限公司 | Production method of ultra-low magnesium and low silicon active fine lime |
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