CN112195338A - High-efficiency energy-saving composite material additive for metallurgical pellets - Google Patents
High-efficiency energy-saving composite material additive for metallurgical pellets Download PDFInfo
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- CN112195338A CN112195338A CN202011008037.0A CN202011008037A CN112195338A CN 112195338 A CN112195338 A CN 112195338A CN 202011008037 A CN202011008037 A CN 202011008037A CN 112195338 A CN112195338 A CN 112195338A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses an efficient energy-saving composite material additive for metallurgical pellets, which comprises 15-25% of carboxymethyl cellulose, 20-25% of humate, 40-60% of iron-containing tailings, 2-5% of an activating agent and 5-10% of water.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to an efficient energy-saving composite material additive for metallurgical pellets.
Background
The metallurgical pellet adhesive is an important auxiliary component for producing metallurgical pellets, and the main additive of the traditional pellet process in China is bentonite. The international addition proportion of bentonite in the pellets is lower than 1 percent, and the industrial level is about 0.5 percent; the domestic bentonite has low pellet quality caused by the factors of grade, process and the like, the bentonite accounts for about 1.5-3% in the whole pellet, and the grade of the pellet can be reduced by about 0.6% when 1% of the bentonite is added.
In the past, due to the influence of factors such as national environmental protection policy adjustment, continuous reduction of bentonite reserves and the like, the exploitation of bentonite is severely limited, and the supply of bentonite in the market is less and less, so that the price of the bentonite in the market is promoted to be higher and higher, and the preparation process has high energy consumption, serious pollution and high cost, so that a new composite material additive needs to be provided to improve the state.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an efficient energy-saving composite material additive for metallurgical pellets.
In order to achieve the purpose, the invention adopts the following technical scheme:
an efficient energy-saving composite material additive for metallurgical pellets comprises 15-25% of carboxymethyl cellulose, 20-25% of humate, 40-60% of iron-containing tailings, 2-5% of an activating agent and 5-10% of water.
Preferably, the preparation method of the additive comprises the following steps:
s1, weighing the raw materials according to the mass percentage for later use;
s2, drying and dehydrating the tailings containing the iron, and crushing to obtain tailing powder;
s3, mixing the tailing powder and the carboxymethyl cellulose, adding the mixture into a mixer, uniformly stirring for 20 to 30 minutes at the speed of 30 to 45 revolutions per minute, adding an activating agent, and stirring again for 30 to 45 minutes to obtain a mixed raw material;
s4, preparing a humate solution, and standing for 20 to 30 minutes for later use;
s5, adding water into the mixed raw materials, uniformly stirring and mixing, adding the reserved humate solution, uniformly stirring for 120-150 minutes until the humate solution is in a taupe state, and forming a taupe material;
s6, drying the grey brown material until the water content is 0.5% -0.8%, putting the dried grey brown material into a flour mill to prepare powder, and screening the powder through a screen with 250-300 meshes to obtain the additive.
Preferably, the preparation method of the carboxymethyl cellulose comprises the following steps:
p1, immersing the cotton fiber into a sodium hydroxide solution with the concentration of 4-5.5%, sealing the cotton fiber in a nitrogen protection environment for 3-5 hours according to the mass ratio of 1:9-12, and performing activation treatment;
p2, adding a mixed solution of citric acid aqueous solution and chloroacetic acid aqueous solution with the same amount into the activation solution, wherein the mixing ratio is 1:2, and keeping for 5-6 hours for esterification treatment;
p3, adding acetic acid water solution with the concentration of 40-50% into the esterification solution for neutralization reaction;
and P4, filtering the neutralized solution, removing the solution, washing with isobutanol, and drying at 70-80 ℃ to obtain the carboxymethyl cellulose.
Preferably, the activator comprises one or more mixtures of sodium carbonate, sodium silicate, calcium hydroxide.
Preferably, the tailings powder of the step S2 is obtained by grinding and sieving with a 300-to 400-mesh sieve.
Preferably, the raw materials for mixing in the step S3 are added in two portions, and the activating agent is added under stirring.
Preferably, the method for preparing the humate solution in the step S4 comprises the following steps:
q1, selecting low-calorific-value coal powder, and adding water to mix to obtain coal powder slurry;
q2, adding sodium hydroxide into the coal powder slurry, wherein the mass percentage of the sodium hydroxide is 1000:2-3, and uniformly stirring and mixing to obtain mixed slurry;
q3, heating the mixed slurry to 80-120 ℃, keeping the temperature for reaction for 2-3 hours, and quenching thirst to obtain the humate solution.
Preferably, the drying manner in the step S6 is to introduce hot air at 50 to 60 ℃ for drying under a continuous stirring state.
The high-efficiency energy-saving composite material additive for the metallurgical pellets provided by the invention mainly comprises mineral raw materials, reduces the reasonable process flow of various reaction equipment, belongs to low-temperature normal-pressure reaction, does not discharge waste water, waste gas and waste residues, effectively improves the environmental protection quality, effectively utilizes low-grade iron ore tailings and the like, can completely or partially replace bentonite used in the traditional process, reduces the manufacturing cost, and is beneficial to popularization and use.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
An efficient energy-saving composite material additive for metallurgical pellets comprises 15-25% of carboxymethyl cellulose, 20-25% of humate, 40-60% of iron-containing tailings, 2-5% of an activating agent and 5-10% of water.
Preferably, the preparation method of the additive comprises the following steps:
s1, weighing the raw materials according to the mass percentage for later use;
s2, drying and dehydrating the tailings containing the iron, and crushing to obtain tailing powder;
s3, mixing the tailing powder and the carboxymethyl cellulose, adding the mixture into a mixer, uniformly stirring for 20 to 30 minutes at the speed of 30 to 45 revolutions per minute, adding an activating agent, and stirring again for 30 to 45 minutes to obtain a mixed raw material;
s4, preparing a humate solution, and standing for 20 to 30 minutes for later use;
s5, adding water into the mixed raw materials, uniformly stirring and mixing, adding the reserved humate solution, uniformly stirring for 120-150 minutes until the humate solution is in a taupe state, and forming a taupe material;
s6, drying the grey brown material until the water content is 0.5% -0.8%, putting the dried grey brown material into a flour mill to prepare powder, and screening the powder through a screen with 250-300 meshes to obtain the additive.
Preferably, the preparation method of the carboxymethyl cellulose comprises the following steps:
p1, immersing the cotton fiber into a sodium hydroxide solution with the concentration of 4-5.5%, sealing the cotton fiber in a nitrogen protection environment for 3-5 hours according to the mass ratio of 1:9-12, and performing activation treatment;
p2, adding a mixed solution of citric acid aqueous solution and chloroacetic acid aqueous solution with the same amount into the activation solution, wherein the mixing ratio is 1:2, and keeping for 5-6 hours for esterification treatment;
p3, adding acetic acid water solution with the concentration of 40-50% into the esterification solution for neutralization reaction;
and P4, filtering the neutralized solution, removing the solution, washing with isobutanol, and drying at 70-80 ℃ to obtain the carboxymethyl cellulose.
Preferably, the activator comprises one or more mixtures of sodium carbonate, sodium silicate, calcium hydroxide.
Preferably, the tailings powder of the step S2 is obtained by grinding and sieving the tailings powder through a 300-mesh to 400-mesh sieve.
Preferably, the raw materials mixed in step S3 are added in two portions, and the activating agent is added while stirring.
Preferably, the method for preparing the humate solution in the step S4 comprises the following steps:
q1, selecting low-calorific-value coal powder, and adding water to mix to obtain coal powder slurry;
q2, adding sodium hydroxide into the coal powder slurry, wherein the mass percentage of the sodium hydroxide is 1000:2-3, and uniformly stirring and mixing to obtain mixed slurry;
q3, heating the mixed slurry to 80-120 ℃, keeping the temperature for reaction for 2-3 hours, and quenching thirst to obtain the humate solution.
Preferably, the drying manner in the step S6 is to introduce hot air at 50 to 60 ℃ to dry the mixture under a continuous stirring state.
The high-efficiency energy-saving composite material additive for the metallurgical pellets provided by the invention mainly comprises mineral raw materials, reduces the reasonable process flow of various reaction equipment, belongs to low-temperature normal-pressure reaction, does not discharge waste water, waste gas and waste residues, effectively improves the environmental protection quality, effectively utilizes low-grade iron ore tailings and the like, can completely or partially replace bentonite used in the traditional process, reduces the manufacturing cost, and is beneficial to popularization and use.
Example 1
An efficient energy-saving composite material additive for metallurgical pellets comprises 20% of carboxymethyl cellulose, 20% of humate, 50% of iron-containing tailings, 2% of activation and 8% of water.
Preferably, the preparation method of the additive comprises the following steps:
s1, weighing the raw materials according to the mass percentage for later use;
s2, drying and dehydrating the tailings containing the iron, and crushing to obtain tailing powder;
s3, mixing the tailing powder and the carboxymethyl cellulose, adding the mixture into a mixer, uniformly stirring for 20 to 30 minutes at the speed of 30 to 45 revolutions per minute, adding an activating agent, and stirring again for 30 to 45 minutes to obtain a mixed raw material;
s4, preparing a humate solution, and standing for 20 to 30 minutes for later use;
s5, adding water into the mixed raw materials, uniformly stirring and mixing, adding the reserved humate solution, uniformly stirring for 120-150 minutes until the humate solution is in a taupe state, and forming a taupe material;
s6, drying the grey brown material until the water content is 0.5% -0.8%, putting the dried grey brown material into a flour mill to prepare powder, and screening the powder through a screen with 250-300 meshes to obtain the additive.
Preferably, the preparation method of the carboxymethyl cellulose comprises the following steps:
p1, immersing the cotton fibers into a sodium hydroxide solution with the concentration of 5%, sealing the cotton fibers in a nitrogen protection environment according to the mass ratio of 1:9-12, and carrying out activation treatment for 3 to 5 hours;
p2, adding a mixed solution of citric acid aqueous solution and chloroacetic acid aqueous solution with the same amount into the activation solution, wherein the mixing ratio is 1:2, and keeping for 5-6 hours for esterification treatment;
p3, adding 40% acetic acid water solution into the esterification solution for neutralization reaction;
and P4, filtering the neutralized solution, removing the solution, washing with isobutanol, and drying at 70-80 ℃ to obtain the carboxymethyl cellulose.
Preferably, the activator comprises sodium carbonate.
Preferably, the tailings powder of the step S2 is obtained by grinding and sieving the tailings powder through a 300-mesh to 400-mesh sieve.
Preferably, the raw materials mixed in step S3 are added in two portions, and the activating agent is added while stirring.
Preferably, the method for preparing the humate solution in the step S4 comprises the following steps:
q1, selecting low-calorific-value coal powder, and adding water to mix to obtain coal powder slurry;
q2, adding sodium hydroxide into the coal powder slurry, wherein the mass percent of the sodium hydroxide is 1000:2, and uniformly stirring and mixing to obtain mixed slurry;
q3, heating the mixed slurry to 80-120 ℃, keeping the temperature for reaction for 2-3 hours, and quenching thirst to obtain the humate solution.
Preferably, the drying manner in the step S6 is to introduce hot air at 50 to 60 ℃ to dry the mixture under a continuous stirring state.
Example 2
The high-efficiency energy-saving composite material additive for the metallurgical pellets comprises 15% of carboxymethyl cellulose, 20% of humate, 60% of iron-containing tailings, 5% of an activating agent and 10% of water.
Preferably, the preparation method of the additive comprises the following steps:
s1, weighing the raw materials according to the mass percentage for later use;
s2, drying and dehydrating the tailings containing the iron, and crushing to obtain tailing powder;
s3, mixing the tailing powder and the carboxymethyl cellulose, adding the mixture into a mixer, uniformly stirring for 20 to 30 minutes at the speed of 30 to 45 revolutions per minute, adding an activating agent, and stirring again for 30 to 45 minutes to obtain a mixed raw material;
s4, preparing a humate solution, and standing for 20 to 30 minutes for later use;
s5, adding water into the mixed raw materials, uniformly stirring and mixing, adding the reserved humate solution, uniformly stirring for 120-150 minutes until the humate solution is in a taupe state, and forming a taupe material;
s6, drying the grey brown material until the water content is 0.5% -0.8%, putting the dried grey brown material into a flour mill to prepare powder, and screening the powder through a screen with 250-300 meshes to obtain the additive.
Preferably, the preparation method of the carboxymethyl cellulose comprises the following steps:
p1, immersing the cotton fibers into a sodium hydroxide solution with the concentration of 4%, sealing the cotton fibers in a nitrogen protection environment according to the mass ratio of 1:9-12, and carrying out activation treatment for 3 to 5 hours;
p2, adding a mixed solution of citric acid aqueous solution and chloroacetic acid aqueous solution with the same amount into the activation solution, wherein the mixing ratio is 1:2, and keeping for 5-6 hours for esterification treatment;
p3, adding a 10% hydrochloric acid solution into the esterification solution to perform a neutralization reaction;
and P4, filtering the neutralized solution, removing the solution, washing with isobutanol, and drying at 70-80 ℃ to obtain the carboxymethyl cellulose.
Preferably, the activator comprises one or more mixtures of sodium carbonate, sodium silicate, calcium hydroxide.
Preferably, the tailings powder of the step S2 is obtained by grinding and sieving the tailings powder through a 300-mesh to 400-mesh sieve.
Preferably, the raw materials mixed in step S3 are added in two portions, and the activating agent is added while stirring.
Preferably, the method for preparing the humate solution in the step S4 comprises the following steps:
q1, selecting low-calorific-value coal powder, and adding water to mix to obtain coal powder slurry;
q2, adding sodium hydroxide into the coal powder slurry, wherein the mass percentage is 1000:3, and uniformly stirring and mixing to obtain mixed slurry;
q3, heating the mixed slurry to 80-120 ℃, keeping the temperature for reaction for 2-3 hours, and quenching thirst to obtain the humate solution.
Preferably, the drying manner in the step S6 is to heat to 70 to 80 degrees celsius for drying.
Claims (8)
1. An efficient energy-saving composite material additive for metallurgical pellets is characterized in that: the additive comprises 15-25% of carboxymethyl cellulose, 20-25% of humate, 40-60% of iron-containing tailings, 2-5% of an activator and 5-10% of water.
2. The high-efficiency energy-saving composite material additive for the metallurgical pellets according to claim 1, which is characterized in that: the preparation method of the additive comprises the following steps:
s1, weighing the raw materials according to the mass percentage for later use;
s2, drying and dehydrating the tailings containing the iron, and crushing to obtain tailing powder;
s3, mixing the tailing powder and the carboxymethyl cellulose, adding the mixture into a mixer, uniformly stirring for 20 to 30 minutes at the speed of 30 to 45 revolutions per minute, adding an activating agent, and stirring again for 30 to 45 minutes to obtain a mixed raw material;
s4, preparing a humate solution, and standing for 20 to 30 minutes for later use;
s5, adding water into the mixed raw materials, uniformly stirring and mixing, adding the reserved humate solution, uniformly stirring for 120-150 minutes until the humate solution is in a taupe state, and forming a taupe material;
s6, drying the grey brown material until the water content is 0.5% -0.8%, putting the dried grey brown material into a flour mill to prepare powder, and screening the powder through a screen with 250-300 meshes to obtain the additive.
3. The high-efficiency energy-saving composite material additive for the metallurgical pellets according to claim 1, which is characterized in that: the preparation method of the carboxymethyl cellulose comprises the following steps:
p1, immersing the cotton fiber into a sodium hydroxide solution with the concentration of 4-5.5%, sealing the cotton fiber in a nitrogen protection environment for 3-5 hours according to the mass ratio of 1:9-12, and performing activation treatment;
p2, adding a mixed solution of citric acid aqueous solution and chloroacetic acid aqueous solution with the same amount into the activation solution, wherein the mixing ratio is 1:2, and keeping for 5-6 hours for esterification treatment;
p3, adding acetic acid water solution with the concentration of 40-50% into the esterification solution for neutralization reaction;
and P4, filtering the neutralized solution, removing the solution, washing with isobutanol, and drying at 70-80 ℃ to obtain the carboxymethyl cellulose.
4. The high-efficiency energy-saving composite material additive for the metallurgical pellets according to claim 1, which is characterized in that: the activating agent comprises one or more of sodium carbonate, sodium silicate and calcium hydroxide.
5. The high-efficiency energy-saving composite material additive for the metallurgical pellets according to claim 2 is characterized in that: and the tailing powder obtained in the step S2 is ground and crushed, and is sieved by a 300-mesh to 400-mesh sieve to obtain the tailing powder.
6. The high-efficiency energy-saving composite material additive for the metallurgical pellets according to claim 2 is characterized in that: the mixed raw material of the step S3 is added in two portions, and the activating agent is added under stirring.
7. The high-efficiency energy-saving composite material additive for the metallurgical pellets according to claim 2 is characterized in that: the method for preparing the humate solution in the S4 step comprises the following steps:
q1, selecting low-calorific-value coal powder, and adding water to mix to obtain coal powder slurry;
q2, adding sodium hydroxide into the coal powder slurry, wherein the mass percentage of the sodium hydroxide is 1000:2-3, and uniformly stirring and mixing to obtain mixed slurry;
q3, heating the mixed slurry to 80-120 ℃, keeping the temperature for reaction for 2-3 hours, and quenching thirst to obtain the humate solution.
8. The high-efficiency energy-saving composite material additive for the metallurgical pellets according to claim 2 is characterized in that: and the drying mode of the step S6 is to introduce hot air at 50-60 ℃ for drying under the state of continuous stirring.
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| CN202011008037.0A CN112195338A (en) | 2020-09-23 | 2020-09-23 | High-efficiency energy-saving composite material additive for metallurgical pellets |
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| CN202011008037.0A CN112195338A (en) | 2020-09-23 | 2020-09-23 | High-efficiency energy-saving composite material additive for metallurgical pellets |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2005059186A1 (en) * | 2003-12-12 | 2005-06-30 | Akzo Nobel N.V. | Process for producing iron ore agglomerates with use of sodium silicate containing binder |
| CN1818097A (en) * | 2006-03-14 | 2006-08-16 | 淄博宜龙化工有限公司 | Pelletizing binder with starch and humus acid and production thereof |
| CN101445561A (en) * | 2008-06-20 | 2009-06-03 | 淄博宜龙化工有限公司 | Preparing method of carboxymethyl cellulose with high viscosity and obtained product |
| CN101880766A (en) * | 2010-07-09 | 2010-11-10 | 王建忠 | Compound type binder used for pellet |
| CN101921911A (en) * | 2010-09-08 | 2010-12-22 | 马鞍山钢铁股份有限公司 | Pellet binder and preparation method thereof |
| CN104099468A (en) * | 2014-07-01 | 2014-10-15 | 郑州大学 | Bauxite tailings-based iron ore pellet binder and preparation method thereof |
| KR20180129164A (en) * | 2017-05-25 | 2018-12-05 | 연세대학교 산학협력단 | Pellet containing iron oxide and method for fabricating the same |
-
2020
- 2020-09-23 CN CN202011008037.0A patent/CN112195338A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005059186A1 (en) * | 2003-12-12 | 2005-06-30 | Akzo Nobel N.V. | Process for producing iron ore agglomerates with use of sodium silicate containing binder |
| CN1818097A (en) * | 2006-03-14 | 2006-08-16 | 淄博宜龙化工有限公司 | Pelletizing binder with starch and humus acid and production thereof |
| CN101445561A (en) * | 2008-06-20 | 2009-06-03 | 淄博宜龙化工有限公司 | Preparing method of carboxymethyl cellulose with high viscosity and obtained product |
| CN101880766A (en) * | 2010-07-09 | 2010-11-10 | 王建忠 | Compound type binder used for pellet |
| CN101921911A (en) * | 2010-09-08 | 2010-12-22 | 马鞍山钢铁股份有限公司 | Pellet binder and preparation method thereof |
| CN104099468A (en) * | 2014-07-01 | 2014-10-15 | 郑州大学 | Bauxite tailings-based iron ore pellet binder and preparation method thereof |
| KR20180129164A (en) * | 2017-05-25 | 2018-12-05 | 연세대학교 산학협력단 | Pellet containing iron oxide and method for fabricating the same |
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