CN111996054A - Special briquette for producing metallurgical active lime and preparation method thereof - Google Patents
Special briquette for producing metallurgical active lime and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/42—Solid fuels essentially based on materials of non-mineral origin on animal substances or products obtained therefrom, e.g. manure
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
- C10L5/08—Methods of shaping, e.g. pelletizing or briquetting without the aid of extraneous binders
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
- C10L5/442—Wood or forestry waste
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
- C10L5/445—Agricultural waste, e.g. corn crops, grass clippings, nut shells or oil pressing residues
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/24—Mixing, stirring of fuel components
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/30—Pressing, compressing or compacting
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/32—Molding or moulds
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention discloses a special briquette for producing metallurgical active lime, which comprises the following components: cow dung, pine branches, potassium permanganate, tea seed meal, semi-coke, activated carbon, sodium chloride, aluminum nitrate, ferric nitrate, calcium oxide, magnesium powder, tween and a proper amount of water. The method for preparing the special briquette comprises the following steps: respectively dissolving aluminum nitrate and ferric nitrate in water, performing ultrasonic dispersion, mixing, adding activated carbon and sodium hexametaphosphate, mixing, filtering, drying filter residues, calcining, and grinding to obtain a composite material; sun-drying the cow dung, the pine branches and the tea seed cake respectively, mixing and crushing, adding semi-coke, tween and water in sequence, and stirring and mixing to obtain a mixed material; thirdly, uniformly mixing the composite material, the mixed material, the potassium permanganate, the sodium chloride, the calcium oxide and the magnesium powder, then placing the mixture into a forming die for forming, taking a formed sample from a cold-pressing forming machine, and removing the sample from the die to obtain the special coal for producing the metallurgical active lime. The coal prepared by the invention has high combustion efficiency and less pollutants.
Description
Technical Field
The invention belongs to the technical field of coal, and particularly relates to special briquette for producing metallurgical active lime and a preparation method thereof.
Background
The active lime is high-quality light burnt lime and has the advantages of fine crystal grains, small volume density, high porosity, large specific surface area, strong reactivity, low impurity and the like. The active lime is a basic raw material in the steel industry, is an important flux in the smelting process, is a slagging material in the steel-making process, is an indispensable material for improving the purity of molten steel and reducing heat loss through desulfurization, deoxidation and dephosphorization, and has the advantages of shortening the smelting time, improving the purity and yield of the molten steel, reducing the consumption of lime and fluorite, prolonging the service life of a converter lining and the like. Due to the important effects of the quality of the steel product and the life of the lining, it is desirable to have a high content of active lime, a low content of silica and sulfur, a low lime calcination rate, a high activity, a suitable lumpiness and to maintain cleanliness, dryness and freshness. The active lime is produced by adopting a metallurgical chemical kiln, fuel is an important factor influencing the production of the active lime, the fuel adopted by the metallurgical chemical kiln in the production process of the active lime at present has solid, liquid and gas, the liquid fuel is in short supply and is rarely adopted, the cost is high, the gas fuel is not easy to store although the use is convenient, the performance is unstable, the fixed fuel is still the most fuel, but the current solid coal still has low combustion efficiency of pulverized coal, the dust amount is large, the content of impurities is high, certain influence is exerted on the production of the active lime, the environment is polluted, and the use effect is not ideal.
Disclosure of Invention
The invention aims to provide a special briquette for producing metallurgical active lime and a preparation method thereof aiming at the problems of low combustion efficiency, high impurity content and the like of coal used in the production process of the existing active lime used in the metallurgical industry.
The scheme of the invention is realized by the following steps:
a special briquette for producing metallurgical active lime comprises the following components in parts by weight: 30-40 parts of cow dung, 20-25 parts of pine branches, 18-22 parts of potassium permanganate, 16-20 parts of tea seed meal, 16-20 parts of semi coke, 14-18 parts of activated carbon, 8-10 parts of sodium chloride, 7-9 parts of aluminum nitrate, 7-9 parts of ferric nitrate, 6-10 parts of calcium oxide, 6-10 parts of magnesium powder, 6-12 parts of tween and a proper amount of water.
As a further illustration of the invention, the Tween is one or the combination of two of Tween-80 and Tween-20.
As a further explanation of the invention, the particle size of the magnesium powder is 150-200 meshes.
A method for preparing special briquette for producing metallurgical active lime comprises the following steps:
the method comprises the following steps: respectively dissolving 7-9 parts of aluminum nitrate and 7-9 parts of ferric nitrate in water, performing ultrasonic dispersion treatment for 10-15 min, mixing, adding 14-18 parts of activated carbon and 13-18 parts of sodium hexametaphosphate, performing ultrasonic dispersion for 40-60 min, filtering, drying filter residue at the temperature of 90-105 ℃ to constant weight, calcining the dried filter residue, cooling to room temperature after calcination, and grinding to powder of 80-100 meshes to obtain a composite material;
step two: respectively drying 30-40 parts of cow dung, 20-25 parts of pine branches and 16-20 parts of tea seed cake, mixing and crushing into 80-100 meshes, sequentially adding 16-20 parts of semi coke, 6-12 parts of tween and 20-30 parts of water, and stirring and mixing to obtain a mixed material;
step three: uniformly mixing the composite material, the mixed material, 18-22 parts of potassium permanganate, 8-10 parts of sodium chloride, 6-10 parts of calcium oxide and 6-10 parts of magnesium powder, placing the mixture in a forming die, increasing the pressure to 30-70 KN, relieving the pressure after keeping the pressure for 30-60S, taking down a formed sample from a cold press forming machine, and removing the formed sample from the die to obtain the special coal for producing the metallurgical active lime.
As a further illustration of the invention, in the first step, the calcination is performed at a temperature of 300-400 ℃ for 30-40 min, and then at a temperature of 500-700 ℃ for 50-60 min.
The technical principle of the invention is as follows:
according to the invention, cow dung, pine branches, tea seed dregs and blue charcoal are taken as combustion raw materials, the cow dung, the pine branches and the tea seed dregs are taken as biomass raw materials, renewable clean energy can reduce the emission of pollutants and reduce the environmental pollution, the blue charcoal has the advantages of high chemical activity, low ash content, low sulfur, low phosphorus, low water content and the like, the coal combustion efficiency can be improved, and the pollution of the prepared lime caused by the volatilization of harmful substances such as sulfur dioxide and the like is reduced. The added pine branches contain the components of the turpentine which can be combusted, so that the fuel coal can be better combusted, the tea seed cake is waste obtained by squeezing the tea oil, and a little oily components are still contained in the tea seed cake, so that the tea seed cake has very good combustibility, and has the effects of supporting combustion and improving heat efficiency. The aluminum nitrate, the ferric nitrate and the activated carbon are compounded to generate a compound of aluminum oxide, ferric oxide and the activated carbon under the action of high temperature, the temperature of a fire point of fire coal can be reduced in the combustion process of the fire coal, the combustion rate is improved, the fire coal can be combusted more fully, a certain desulfurization effect is achieved, volatilization of sulfur dioxide and nitrogen oxides in the combustion process of the fire coal can be reduced, emission of harmful gases is reduced, and the content of sulfur in the prepared lime is reduced. The added magnesium powder has certain combustion supporting effect, and the combustion efficiency of the coal is improved.
Aluminum nitrate, ferric nitrate and active carbon are mixed and then calcined at high temperature in the preparation process, and a compound of aluminum oxide, ferric oxide and active carbon can be generated, so that the effect of the aluminum oxide and the ferric oxide is more stable, the specific surface area of the active carbon can be improved, the pore structure of the active carbon can be improved, the active carbon can absorb more harmful substances such as sulfur dioxide, nitrogen oxide and the like in the combustion process, the content of sulfur impurities is effectively reduced, the quality of lime is improved, and meanwhile, the environmental pollution can be reduced. The tween is added, so that the mixture of combustion components such as cow dung, pine branches and the like, the compound of aluminum oxide, ferric oxide and active carbon, potassium permanganate, sodium chloride and the like is more uniformly mixed, the combustion is more thorough, and the combustion efficiency is improved.
The invention has the following good effects:
1. the burning raw materials in the invention are cow dung, pine branches and tea dregs as biomass raw materials, the renewable clean energy can reduce the emission of pollutants and reduce the environmental pollution, and the semi-coke has the advantages of high chemical activity, low ash content, low sulfur, low phosphorus, low moisture and the like, can improve the burning efficiency of coal, and reduces the pollution of the prepared lime caused by the volatilization of harmful substances such as sulfur dioxide and the like. The invention can effectively improve the combustion efficiency of the coal, effectively reduce the content of impurity sulfur, improve the quality of lime and simultaneously reduce the environmental pollution through the synergistic effect of all the components.
2. The invention has reasonable and practical proportion, can be used for producing targeted lime products in the metallurgy field of the downstream industry, has the advantages of reducing production cost, low impurity sulfur content, energy saving, environmental protection and the like, and is suitable for being generally popularized and used.
Detailed Description
The invention relates to a special briquette for producing metallurgical active lime and a preparation method thereof, which are described in the following with reference to the examples, wherein the description does not further limit the content of the invention.
Example 1:
the special briquette for producing the metallurgical active lime comprises the following components in parts by weight: 30 parts of cow dung, 20 parts of pine branches, 18 parts of potassium permanganate, 16 parts of tea seed meal, 16 parts of semi coke, 14 parts of activated carbon, 8 parts of sodium chloride, 7 parts of aluminum nitrate, 7 parts of ferric nitrate, 6 parts of calcium oxide, 6 parts of magnesium powder with the particle size of 150 meshes, 6 parts of tween-80 and a proper amount of water.
The preparation method of the special briquette for producing the metallurgical active lime comprises the following steps:
the method comprises the following steps: respectively dissolving 7 parts of aluminum nitrate and 7 parts of ferric nitrate in water, performing ultrasonic dispersion treatment for 10min, mixing, adding 14 parts of activated carbon and 13 parts of sodium hexametaphosphate, performing ultrasonic dispersion for 40min, filtering, drying the filter residue to constant weight at 90 ℃, calcining the dried filter residue, calcining at 300 ℃ for 30min, calcining at 500 ℃ for 50min, cooling to room temperature after calcination, and grinding into 80-mesh powder to obtain a composite material;
step two: respectively drying 30 parts of cow dung, 20 parts of pine branches and 16 parts of tea seed cake in the sun, mixing and crushing the mixture into 80 meshes, and then sequentially adding 16 parts of semi coke, 6 parts of tween and 20 parts of water, stirring and mixing to obtain a mixed material;
step three: uniformly mixing the composite material, the mixed material, 18 parts of potassium permanganate, 8 parts of sodium chloride, 6 parts of calcium oxide and 6 parts of magnesium powder, placing the mixture in a forming die, increasing the pressure to 30KN, maintaining the pressure for 30S, then releasing the pressure, taking down a formed sample from a cold press forming machine, and removing the formed sample from the die to obtain the special coal for producing the metallurgical active lime.
Example 2:
the special briquette for producing the metallurgical active lime comprises the following components in parts by weight: 40 parts of cow dung, 25 parts of pine branches, 22 parts of potassium permanganate, 20 parts of tea seed meal, 20 parts of semi coke, 18 parts of activated carbon, 10 parts of sodium chloride, 9 parts of aluminum nitrate, 9 parts of ferric nitrate, 10 parts of calcium oxide, 10 parts of magnesium powder with the particle size of 200 meshes, and the weight ratio of tween-80 to tween-20 is 2: 1 portion to 12 portions and a proper amount of water.
The preparation method of the special briquette for producing the metallurgical active lime comprises the following steps:
the method comprises the following steps: respectively dissolving 9 parts of aluminum nitrate and 9 parts of ferric nitrate in water, performing ultrasonic dispersion treatment for 15min, mixing, adding 18 parts of activated carbon and 18 parts of sodium hexametaphosphate, performing ultrasonic dispersion for 60min, filtering, drying the filter residue to constant weight at 105 ℃, calcining the dried filter residue, calcining at 400 ℃ for 40min, calcining at 700 ℃ for 60min, cooling to room temperature after calcination, and grinding into powder of 100 meshes to obtain the composite material;
step two: respectively drying 40 parts of cow dung, 25 parts of pine branches and 20 parts of tea seed cake in the sun, mixing and crushing the mixture into 100 meshes, and then sequentially adding 20 parts of semi coke, 12 parts of tween and 30 parts of water, and stirring and mixing the mixture to obtain a mixed material;
step three: uniformly mixing the composite material, the mixed material, 22 parts of potassium permanganate, 10 parts of sodium chloride, 10 parts of calcium oxide and 10 parts of magnesium powder, placing the mixture in a forming die, increasing the pressure to 70KN, relieving the pressure after keeping the pressure for 60S, taking down a formed sample from a cold press forming machine, and removing the formed sample from the die to obtain the special coal for producing the metallurgical active lime.
Example 3:
the special briquette for producing the metallurgical active lime comprises the following components in parts by weight: 35 parts of cow dung, 23 parts of pine branches, 20 parts of potassium permanganate, 18 parts of tea seed meal, 18 parts of semi coke, 16 parts of activated carbon, 9 parts of sodium chloride, 8 parts of aluminum nitrate, 8 parts of ferric nitrate, 8 parts of calcium oxide, 8 parts of magnesium powder with the particle size of 175 meshes, 9 parts of tween-20 and a proper amount of water.
The preparation method of the special briquette for producing the metallurgical active lime comprises the following steps:
the method comprises the following steps: respectively dissolving 8 parts of aluminum nitrate and 8 parts of ferric nitrate in water, performing ultrasonic dispersion treatment for 13min, mixing, adding 16 parts of activated carbon and 15 parts of sodium hexametaphosphate, performing ultrasonic dispersion for 50min, filtering, drying the filter residue to constant weight at 100 ℃, calcining the dried filter residue, calcining at 350 ℃ for 35min, calcining at 600 ℃ for 55min, cooling to room temperature after calcination, and grinding into 90-mesh powder to obtain a composite material;
step two: respectively drying 35 parts of cow dung, 23 parts of pine branches and 18 parts of tea seed cake in the sun, mixing and crushing the mixture into 90 meshes, and then sequentially adding 18 parts of semi coke, 9 parts of tween and 25 parts of water, stirring and mixing to obtain a mixed material;
step three: uniformly mixing the composite material, the mixed material, 20 parts of potassium permanganate, 9 parts of sodium chloride, 8 parts of calcium oxide and 8 parts of magnesium powder, placing the mixture in a forming die, increasing the pressure to 50KN, maintaining the pressure for 45S, then releasing the pressure, taking down a formed sample from a cold press forming machine, and removing the formed sample from the die to obtain the special coal for producing the metallurgical active lime.
Example 4:
the special briquette for producing the metallurgical active lime comprises the following components in parts by weight: the fertilizer comprises, by weight, 32 parts of cow dung, 24 parts of pine branches, 22 parts of potassium permanganate, 18 parts of tea seed meal, 17 parts of semi coke, 14 parts of activated carbon, 10 parts of sodium chloride, 7 parts of aluminum nitrate, 7 parts of ferric nitrate, 9 parts of calcium oxide, 9 parts of magnesium powder with the particle size of 190 meshes, 7 parts of tween-80 and a proper amount of water.
The preparation method of the special briquette for producing the metallurgical active lime comprises the following steps:
the method comprises the following steps: respectively dissolving 7 parts of aluminum nitrate and 7 parts of ferric nitrate in water, performing ultrasonic dispersion treatment for 12min, mixing, adding 14 parts of activated carbon and 14 parts of sodium hexametaphosphate, performing ultrasonic dispersion for 45min, filtering, drying the filter residue to constant weight at 100 ℃, calcining the dried filter residue, calcining at 330 ℃ for 38min, calcining at 550 ℃ for 60min, cooling to room temperature after calcination, and grinding into 85-mesh powder to obtain a composite material;
step two: respectively drying 32 parts of cow dung, 24 parts of pine branches and 18 parts of tea seed cake in the sun, mixing and crushing the mixture into 85 meshes, and then sequentially adding 17 parts of semi coke, 7 parts of tween and 22 parts of water, stirring and mixing to obtain a mixed material;
step three: uniformly mixing the composite material, the mixed material, 22 parts of potassium permanganate, 10 parts of sodium chloride, 9 parts of calcium oxide and 9 parts of magnesium powder, placing the mixture in a forming die, increasing the pressure to 40KN, maintaining the pressure for 50S, then releasing the pressure, taking down a formed sample from a cold press forming machine, and removing the formed sample from the die to obtain the special coal for producing the metallurgical active lime.
Example 5:
the special briquette for producing the metallurgical active lime comprises the following components in parts by weight: 36 parts of cow dung, 22 parts of pine branches, 21 parts of potassium permanganate, 17 parts of tea seed meal, 18 parts of semi coke, 18 parts of activated carbon, 8 parts of sodium chloride, 9 parts of aluminum nitrate, 9 parts of ferric nitrate, 7 parts of calcium oxide, 7 parts of magnesium powder with the particle size of 160 meshes, 10 parts of mixed tween-80 and tween-20 and a proper amount of water.
The preparation method of the special briquette for producing the metallurgical active lime comprises the following steps:
the method comprises the following steps: respectively dissolving 9 parts of aluminum nitrate and 9 parts of ferric nitrate in water, performing ultrasonic dispersion treatment for 14min, mixing, adding 18 parts of activated carbon and 17 parts of sodium hexametaphosphate, performing ultrasonic dispersion for 60min, filtering, drying filter residue to constant weight at 95 ℃, calcining the dried filter residue, calcining at 370 ℃ for 32min, calcining at 680 ℃ for 55min, cooling to room temperature after calcination, and grinding into powder of 100 meshes to obtain a composite material;
step two: drying 36 parts of cow dung, 22 parts of pine branches and 17 parts of tea seed cake respectively, mixing and crushing into 95 meshes, and then adding 18 parts of semi coke, 10 parts of tween and 27 parts of water in sequence, stirring and mixing to obtain a mixed material;
step three: uniformly mixing the composite material, the mixed material, 21 parts of potassium permanganate, 8 parts of sodium chloride, 7 parts of calcium oxide and 7 parts of magnesium powder, placing the mixture in a forming die, increasing the pressure to 60KN, relieving the pressure after keeping the pressure for 35S, taking down a formed sample from a cold press forming machine, and removing the formed sample from the die to obtain the special coal for producing the metallurgical active lime.
The special briquette for producing the metallurgical active lime prepared in the embodiments 1 to 5 of the invention is subjected to a combustion test, and corresponding similar products sold in the market are used as comparative examples for comparison, and the test conditions are shown in the following table 1.
TABLE 1 test conditions of combustion performance of special briquette for producing metallurgical active lime
The above-described embodiments of the present invention are intended to be illustrative only and not limiting, and the scope of the invention is indicated in the claims, along with the full range of ingredients, ratios of ingredients, and process parameters of manufacture, and the above description is not intended to be exhaustive of the invention, and thus, any changes that come within the meaning and range of equivalency of the claims are intended to be embraced therein.
Claims (5)
1. 30-40 parts of excrement, 20-25 parts of pine branches, 18-22 parts of potassium permanganate, 16-20 parts of tea seed meal, 16-20 parts of semi coke, 14-18 parts of activated carbon, 8-10 parts of sodium chloride, 7-9 parts of aluminum nitrate, 7-9 parts of ferric nitrate, 6-10 parts of calcium oxide, 6-10 parts of magnesium powder, 6-12 parts of tween and a proper amount of water.
2. The special briquette for producing metallurgical active lime according to claim 1, wherein the tween is one or a combination of two of tween-80 and tween-20.
3. The special briquette for producing metallurgical active lime according to claim 1, wherein the magnesium powder has a particle size of 150-200 meshes.
4. The method for preparing the special briquette for producing the metallurgical active lime is characterized by comprising the following steps:
the method comprises the following steps: respectively dissolving 7-9 parts of aluminum nitrate and 7-9 parts of ferric nitrate in water, performing ultrasonic dispersion treatment for 10-15 min, mixing, adding 14-18 parts of activated carbon and 13-18 parts of sodium hexametaphosphate, performing ultrasonic dispersion for 40-60 min, filtering, drying filter residue at the temperature of 90-105 ℃ to constant weight, calcining the dried filter residue, cooling to room temperature after calcination, and grinding to powder of 80-100 meshes to obtain a composite material;
step two: respectively drying 30-40 parts of cow dung, 20-25 parts of pine branches and 16-20 parts of tea seed cake, mixing and crushing into 80-100 meshes, sequentially adding 16-20 parts of semi coke, 6-12 parts of tween and 20-30 parts of water, and stirring and mixing to obtain a mixed material;
step three: uniformly mixing the composite material, the mixed material, 18-22 parts of potassium permanganate, 8-10 parts of sodium chloride, 6-10 parts of calcium oxide and 6-10 parts of magnesium powder, placing the mixture in a forming die, increasing the pressure to 30-70 KN, relieving the pressure after keeping the pressure for 30-60S, taking down a formed sample from a cold press forming machine, and removing the formed sample from the die to obtain the special coal for producing the metallurgical active lime.
5. The method for preparing the special briquette for producing the metallurgical active lime according to claim 4, wherein the calcination condition in the first step is that the calcination is carried out at the temperature of 300-400 ℃ for 30-40 min, and then at the temperature of 500-700 ℃ for 50-60 min.
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