CN106591575A - Low-energy-consumption cold-pressing pellet and preparation method thereof - Google Patents
Low-energy-consumption cold-pressing pellet and preparation method thereof Download PDFInfo
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- CN106591575A CN106591575A CN201710143442.5A CN201710143442A CN106591575A CN 106591575 A CN106591575 A CN 106591575A CN 201710143442 A CN201710143442 A CN 201710143442A CN 106591575 A CN106591575 A CN 106591575A
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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
- C22B1/248—Binding; Briquetting ; Granulating of metal scrap or alloys
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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
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
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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
Abstract
The invention discloses a low-energy-consumption cold-pressing pellet and a preparation method thereof. The cold-pressing pellet is formed by mixing steelmaking dust removal waste, iron containing waste residues and a binder. Compared with the prior art, according to the low-energy-consumption cold-pressing pellet and the preparation method thereof, steelmaking by-products are adopted as raw materials, the water content is low, by-product index data are good, and in the state of high temperature in a furnace, bursting is not prone to happening, and the form keeping capacity is high; and the proper particle size and the high bulk specific weight are achieved, the particle size of the pellet is uniform, the air permeability of a material column can be improved easily, coal gas distribution is improved, and blast furnace coal gas utilization is promoted. A dry ash briquetting process is adopted, water does not need to be added, forming is good, the powder rate is low, the compressive strength of the pellet is high, and the requirement of metallurgy cold-pressing pellet strength is completely met; the cold-pressing pellet belongs to low-temperature solidification, baking is not needed, moisture inside and outside the pellet is controlled more uniformly through the internal exothermic reaction in a spontaneous combustion state, and the characteristic of the good ore reducibility is kept; and the process is relatively simple, operating is stable, cost is low, and environment friendliness is achieved.
Description
Technical field
The present invention relates to the comprehensive utilization of steel plant's solid waste resource and environmental protection technical field, more particularly to a kind of low energy
Consumption coal-pressing ball and preparation method thereof.
Background technology
China Steel yield has kept rapid growth for years, becomes world steel big country.Incident environmental protection is asked
Topic also becomes increasingly conspicuous, and the pollution of trade waste produced by Iron and Steel Enterprises in China has had influence on location periphery increasingly severely
Environment, and start restrict enterprise itself development.Therefore, trade waste pollution is eliminated, clean manufacturing is realized, is particularly located
The trade wastes such as the various dust that reason production each operation is produced are the weights that from now on China's steel and iron industry keeps sustainable and healthy development
Want index.
Iron and steel production is made up of multiple working procedures such as Feedstock treating (sintering, pelletizing, coking), ironmaking, steel-making, steel rolling.Often
Ton steel about produces 5%～10% various dust, wherein it is main include sintering dust, coking dust, blast furnace dust and dirt mud,
Converter dust, electric furnace dust, mill scale and dirt mud etc..Counted according to related data, the dust effective rate of utilization of China is not enough
80%.The characteristics of these dust is iron content and carbon containing, is valuable secondary resource.But, due to complicated component, granularity change model
Enclose the reasons such as the fluctuation of big and moisture is big so that the utilization of dust is more difficult.
Especially complicated to make steel dry method dust ash composition in many dust of steel plant, its inside is containing about
10%～30% CaO, 10% or so MgO, CaO and MgO poles unstability can occur following aquation and clear up reaction after chance water,
Substantial amounts of heat can be discharged in course of reaction, volume also can be expanded after reaction.And dedusting ash fine size, specific surface area
Greatly, hydrophily is poor, difficult shaping, maximum using degree-of-difficulty factor.
To steel-making dust resource recycling, environmental pollution was both reduced, reduced energy resource consumption, and effectively reclaimed and removed
Iron in dirt ash and slag, while slugging and cooling can also be played a part of.The mesh for reach volume increase, consumption reduction, reducing steel mill cost
, while and meet country reduce energy resource consumption, the requirement of environmental protection and energy saving.
The defect of prior art：At present modal process program is adopted and directly will make steel dedusting ash etc. to match somebody with somebody into sintering
Material, midway adds the technique of slagging agent, but energy resource consumption is high, and the iron conversion ratio in dedusting ash and slag is low；Or using wet type pelletizing
Technique, be prepared into after raw material ball with nodulizer enter back into it is rotary kiln sintered, but due to the addition of water in pelletizing, in sintering process
In increase sintering energy consumption, meanwhile, this kind of pelletizing intensity difference is also easy to produce pelletizing fragmentation in sintering process.
The content of the invention
To solve above technical problem, the present invention provides low energy consumption coal-pressing ball and preparation method thereof, to solve maximum journey
The beneficial elements such as the metallic iron inside degree ground recycled dust removing ashes reduce production cost, economize on resources, and reduce pollution problem.
The technical solution used in the present invention is as follows：A kind of low energy consumption coal-pressing ball, it is critical only that by following mass fraction
Raw material is constituted：Steel-making dedusting waste material 45-60 parts, iron slag 30-54 parts, binding agent 1-10 parts.
Preferably, the moisture content of the coal-pressing ball is a, 0 ＜ a≤5.0%wt；Full weight of iron point in the coal-pressing ball
Shuo≤55.0%wt, the quality Fen Shuo≤3.0%wt of calcium oxide, silica in the coal-pressing ball in the coal-pressing ball
Mass fraction is c, 0 ＜ c≤5.0%wt.
Preferably, the steel-making dedusting waste material is 48 parts, and iron slag is 44 parts, and binding agent is 8 parts.
Preferably, the steel-making dedusting waste material is one or two in steel-making dedusting ash, Sludge from Dust Removal of Steelmaking.
Preferably, the iron slag is one or two in iron scale, steel-making slag powder.
Preferably, the bonding agent is mixture, waterglass or the polymer binder of bentonite and spent pulp liquors.
A kind of preparation method of low energy consumption coal-pressing ball, it is critical only that and carry out according to the following steps：
Step one, will steel-making dedusting waste material and iron slag be tentatively uniformly mixed after mixed through once sealing material
Material I, is then stirred compound I so as to is obtained compound II through secondary material of sealing after fully mixing again, is subsequently added into
Steel-making dedusting waste material, so as to seal material through three times after the water content for adjusting compound II compound III is obtained；
Step 2, obtained compound III in step one is added in batch mixer, and while add binding agent, enters one
Step is uniformly mixing to obtain compound batch mixing；
Step 3, obtained compound batch mixing in step 2 is delivered to into ball press, is pressed under mechanical force compound
Pelletizing；
Step 4, obtained composite pellet in step 3 is obtained into finished product coal-pressing ball through drying naturally.
Preferably, the material of once sealing in the step one is specially：Mixed just batch mixing is placed more than 2 hours；
Secondary material of sealing in the step one is specially：Rear compound I will again be stirred to place more than 1 hour；In the step one
Seal material three times to be specially：The compound II for mixing up moisture is placed into again more than 10 minutes.
Preferably, the whipping temp of the batch mixer in the step 2 is more than 30 DEG C.
Preferably, the ball press rotating speed in the step 3 is 5-20 rev/min.
Through the coal-pressing ball that above-mentioned steps are obtained, good sphericity, full weight of iron Fen Shuo≤55.0% in coal-pressing ball
Wt, the moisture content≤5.0%wt of coal-pressing ball, the quality Fen Shuo≤3.0%wt of calcium oxide, silica in the coal-pressing ball
Mass fraction≤5.0%wt；Dry bulb compression strength up to 1500-4000N, 1 meter of high free fall test up to 5 times, hot tearing
Index (DI) is 0.15%-2.2%, and the granularity more than 90% of coal-pressing ball is distributed in the range of 10mm-50mm.
Beneficial effect：Compared with prior art, low energy consumption coal-pressing ball that the present invention is provided and preparation method thereof, using refining
The accessory substance of steel -- steel-making dedusting ash (or sludge), ironmaking dedusting ash, ball milling steel slag or iron scale etc. are used as raw material, moisture content
Low, hot tearing exponent data is good, under furnace high-temperature state, is difficult explosion, and form holding capacity is strong；With suitable granularity and larger
Bulk density, make coal-pressing ball add converter after can rapidly enter slag blanket, quick slag；Coal-pressing ball epigranular, is conducive to
The gas permeability of stock column is improved, is improved gas flow distribution and is promoted blast furnace gas to utilize.Using dry ash briquetting technique, without adding water,
Forming, chip index is low, and the compression strength of pelletizing is high, is fully achieved the requirement of metallurgical cold-pressed pellets intensity；Coal-pressing ball belongs to low
Temperature consolidation, without baking, controls free surface moisture in pelletizing evenly by exothermic reaction internal under spontaneous combustion state, and remains ore deposit
The characteristics of stone is Well-recovered；Technique is relatively easy, operates steadily, low cost, and beneficial to environmental protection.
Specific embodiment
To make those skilled in the art be better understood from technical scheme, with reference to subordinate list and specific embodiment party
Formula elaborates to the present invention.
First, a kind of low energy consumption coal-pressing ball
Embodiment 1：The configuration proportion of each raw material in low energy consumption coal-pressing ball
By each raw material in low energy consumption coal-pressing ball, respectively the mass fraction as described in table 1 is mixed, and obtains 3 groups of different mixing
The low energy consumption coal-pressing ball I～III of ratio.
The low energy consumption coal-pressing ball of the different mixing proportion of table 1 (mass fraction)
Embodiment 2：The preparation method of low energy consumption coal-pressing ball
Step one, will steel-making 42 parts of dedusting ash and 54 parts of iron scale be tentatively uniformly mixed after through once sealing material,
Compound I will be obtained after 2 hours of just batch mixing placement；Then compound I is stirred so as to Jing after fully mixing again
Cross it is secondary seal material, will compound I place 1 hour again after obtain compound II；3 parts of dry steel-making dedusting ash is subsequently added into,
So as to after the water content for adjusting compound II, make the moisture content of compound II in 10%wt, material is sealed through three times, water will be mixed up
The compound II for dividing obtains compound III after placing 10 minutes again；
Step 2, obtained compound III in step one is added in batch mixer, the whipping temp of batch mixer is 30
DEG C, and while 1 part of the mixture of addition bentonite and spent pulp liquors, is further uniformly mixing to obtain compound batch mixing；
Step 3, obtained compound batch mixing in step 2 is delivered to ball press, ball press rotating speed is 5 revs/min, in machinery
Composite pellet is pressed under power effect；
Step 4, obtained composite pellet in step 3 is obtained into finished product coal-pressing ball I through drying naturally.
Full weight of iron fraction in the coal-pressing ball that the embodiment is obtained is 45.0%wt, and the moisture content of coal-pressing ball is
5.0%wt, the mass fraction of calcium oxide is 3.0%wt, and the mass fraction of silica is 5.0%wt in the coal-pressing ball；
Up to 1500N, up to more than 5 times, hot tearing index (DI) is 2.2% to 1 meter of high free fall test to dry bulb compression strength, cold-pressing balls
The granularity 90% of group is distributed in the range of 10mm-50mm.
Embodiment 3：The preparation method of low energy consumption coal-pressing ball
Step one, will 5 parts of 56 parts of steel-making dedusting mud, 25 parts of iron scale and steel-making slag powder be tentatively uniformly mixed after through
Material is once sealed, compound I will be obtained after 5 hours of just batch mixing placement；Then compound I is stirred so as to fill again
Point mix after seal material through secondary, will compound I place 2 hours again after obtain compound II；It is subsequently added into dry steel-making
4 parts of dedusting ash, so as to after the water content for adjusting compound II, make the moisture content of compound II in 6%wt, through three times material is sealed,
Will mix up moisture compound II place 40 minutes again after obtain compound III；
Step 2, obtained compound III in step one is added in batch mixer, the whipping temp of batch mixer is 45
DEG C, and while 10 parts of waterglass of addition, is further uniformly mixing to obtain compound batch mixing；
Step 3, obtained compound batch mixing in step 2 is delivered to ball press, ball press rotating speed is 20 revs/min in machinery
Composite pellet is pressed under power effect；
Step 4, obtained composite pellet in step 3 is obtained into finished product coal-pressing ball II through drying naturally.
Full weight of iron fraction in the coal-pressing ball that the embodiment is obtained is 55.0%wt, and the moisture content of coal-pressing ball is
3%wt, the mass fraction of calcium oxide is 6.0%wt, and the mass fraction of silica is 3.2%wt in the coal-pressing ball；It is dry
Up to 3800N, up to 12 times, hot tearing index (DI) is 0.8% to 1 meter of high free fall test to ball compression strength, coal-pressing ball
Granularity 95% is distributed in the range of 20mm-45mm.
Embodiment 4：The preparation method of low energy consumption coal-pressing ball
Step one, 9 parts of 30 parts of dedusting ash of steel-making, 15 parts of steel-making dedusting mud, 35 parts of iron scale and steel-making slag powder are tentatively stirred
Mix through once sealing material after being well mixed, compound I will be obtained after 7 hours of just batch mixing placement；Then compound I is carried out
Stir so as to seal material through secondary after fully mixing again, will compound I place 3 hours again after obtain compound II；Then
3 parts dry of steel-making dedusting ash is added, so as to after the water content for adjusting compound II, make the moisture content of compound II in 8%wt,
Seal material through three times, will mix up moisture compound II place 1 hour again after obtain compound III；
Step 2, obtained compound III in step one is added in batch mixer, the whipping temp of batch mixer is 55
DEG C, and while 8 parts of waterglass of addition, is further uniformly mixing to obtain compound batch mixing；
Step 3, obtained compound batch mixing in step 2 is delivered to ball press, ball press rotating speed is 10 revs/min, in machine
Composite pellet is pressed under the effect of tool power；
Step 4, obtained composite pellet in step 3 is obtained into finished product coal-pressing ball III through drying naturally.
Full weight of iron fraction in the coal-pressing ball that the embodiment is obtained is 59.8%wt, and the moisture content of coal-pressing ball is
1.16%wt, the mass fraction of calcium oxide is 5.5%wt, and the mass fraction of silica is 2.8%wt in the coal-pressing ball；
Up to 4000N, up to 15 times, hot tearing index (DI) is 0.12% to 1 meter of high free fall test to dry bulb compression strength, coal-pressing ball
Granularity 96.5% be distributed in the range of 25mm-50mm.
2nd, converter will be carried out using the coal-pressing ball of present invention preparation and using general pelletizing obtained in wet processing respectively
STEELMAKING PRODUCTION Experimental comparison studies, by taking coal-pressing ball III as an example：
General pelletizing and coal-pressing ball III are added into steel-smelting electric furnace with steel scrap respectively, per stove ton steel pelletizing 44kg/t are used,
Per group of test heat is 10 times, is then averaged, and Comparative result result is as shown in the table：
Data above contrast understands that steel scrap per ton is little using impact of the general pelletizing to every energy-saving index, and uses cold
Pressure ball group II I44kg can reduce by 20.86 degree of electric power consumption per ton steel, and ton steel steel technology reduces 6.45kg, and molten steel recovery rate is improved
0.43%, ton steel oxygen consumption reduces by 5.66 cubes.(1) main cause that steel technology is reduced：Lime in slagging course easily with
SiO2 generates 2CaOSiO2 high-melting-point substances.FeO can change 2CaOSiO2 forms in pelletizing, reach the mesh of Fast Slag Melting
's.FeO instead of the oxidized metal iron that a part is blown in electric furnace and form FeO and carrys out slugging effect in pelletizing, so as to reduce iron
Oxidation, improves molten steel recovery rate, reduces steel technology；(2) main cause that oxygen consumption is reduced：Because electric furnace is in oxygen
The change phase needs to be blown into the element such as carbon silicomanganese phosphorus in dioxygen oxidation molten metal, and it can be these elements of oxidation to contain FeO in pelletizing
Certain oxygen is provided, the purpose of certain oxygen consumption is reduced with this；(3) main cause that power consumption is reduced：Coal-pressing ball is being added
Lime rapid slagging, the effect of quick submerged arc can be made after electric furnace to reduce electric arc photothermal loss in heating process, reach
Reduce the purpose of power consumption.By adding multiple coal-pressing ball in steel scrap, it reduces steel technology in pneumatic steelmaking, and oxygen disappears
The effect of consumption is also embodied on electric furnace.Meanwhile, coal-pressing ball can Fast Slag Melting, form foamed slag and play the effect of submerged arc
Really, the loss of arc radiation heat is reduced, electric power consumption per ton steel is reduced.
Finally it is to be appreciated that foregoing description is only the preferred embodiments of the present invention, those skilled in the art is in the present invention
Enlightenment under, on the premise of without prejudice to present inventive concept and claim, can make as multiple types represent, such change
Change and each fall within protection scope of the present invention.
Claims (10)
1. a kind of low energy consumption coal-pressing ball, it is characterised in that be made up of the raw material of following mass fraction：Steel-making dedusting waste material 45-60
Part, iron slag 30-54 parts, binding agent 1-10 parts.
2. low energy consumption coal-pressing ball according to claim 1, it is characterised in that：The moisture content of the coal-pressing ball be a, 0
＜ a≤5.0%wt；Full weight of iron Fen Shuo≤55.0%wt, the quality of calcium oxide in the coal-pressing ball in the coal-pressing ball
Fen Shuo≤3.0%wt, the mass fraction of silica is c, 0 ＜ c≤5.0%wt in the coal-pressing ball.
3. low energy consumption coal-pressing ball according to claim 1 and 2, it is characterised in that：The steel-making dedusting waste material is 48 parts,
Iron slag is 44 parts, and binding agent is 8 parts.
4. low energy consumption coal-pressing ball according to claim 2, it is characterised in that：The steel-making dedusting waste material is steel-making dedusting
Ash, one or two in Sludge from Dust Removal of Steelmaking.
5. low energy consumption coal-pressing ball according to claim 2, it is characterised in that：The iron slag is iron scale, steel
One or two in ground-slag.
6. low energy consumption coal-pressing ball according to claim 2, it is characterised in that：The bonding agent is bentonite and secondary stock
One kind in the mixture of liquid, waterglass or polymer binder.
7. the preparation method of the low energy consumption coal-pressing ball according to any one of claim 1-6, it is characterised in that by following step
Suddenly carry out：
Step one, will steel-making dedusting waste material and iron slag be tentatively uniformly mixed after obtain compound I through once sealing material,
Then compound I is stirred so as to obtain compound II through secondary material of sealing after fully mixing again, be subsequently added into steel-making
Dedusting waste material, so as to seal material through three times after the water content for adjusting compound II compound III is obtained；
Step 2, obtained compound III in step one is added in batch mixer, and while add binding agent, is further stirred
Mix and uniformly obtain compound batch mixing；
Step 3, obtained compound batch mixing in step 2 is delivered to into ball press, under mechanical force composite pellet is pressed into；
Step 4, obtained composite pellet in step 3 is obtained into finished product coal-pressing ball through drying naturally.
8. the preparation method of low energy consumption coal-pressing ball according to claim 7, it is characterised in that：In the step one one
Secondary material of sealing is specially：Mixed just batch mixing is placed more than 2 hours；Secondary material of sealing in the step one is specially：Will
Stir rear compound I again to place more than 1 hour；Three times in the step one are sealed material and are specially：The mixing of moisture will be mixed up
Material II places again more than 10 minutes.
9. the preparation method of low energy consumption coal-pressing ball according to claim 7, it is characterised in that：It is mixed in the step 2
The whipping temp of material machine is more than 30 DEG C.
10. the preparation method of low energy consumption coal-pressing ball according to claim 7, it is characterised in that：In the step 3
Ball press rotating speed is 5-20 rev/min.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108642231A (en) * | 2018-05-15 | 2018-10-12 | 鞍钢股份有限公司 | A kind of converter slag modifier and the method using its obtained low alkalinity slag system |
| CN110016551A (en) * | 2019-05-06 | 2019-07-16 | 中冶华天工程技术有限公司 | Cold rolling sludge converter resource utilization method |
| CN110747345A (en) * | 2019-11-05 | 2020-02-04 | 邯郸钢铁集团有限责任公司 | Converter fly ash pressed brick and preparation and utilization methods thereof |
| CN110894576A (en) * | 2018-09-13 | 2020-03-20 | 中冶宝钢技术服务有限公司 | Metallurgical auxiliary material and preparation method thereof |
| CN111154972A (en) * | 2020-01-21 | 2020-05-15 | 鞍钢股份有限公司 | Preparation method of spherical granular iron for steelmaking |
| CN111235386A (en) * | 2020-01-19 | 2020-06-05 | 中冶宝钢技术服务有限公司 | Method for forming dedusting ash |
| CN111893297A (en) * | 2020-08-06 | 2020-11-06 | 河北蓝海智投环保科技有限公司 | Preparation method of cold-pressed block of converter fly ash |
| CN112174470A (en) * | 2020-09-30 | 2021-01-05 | 宝钢湛江钢铁有限公司 | Treatment method of cold-rolled oily sludge |
| CN112981095A (en) * | 2021-02-08 | 2021-06-18 | 山西太钢不锈钢股份有限公司 | Iron scale ball pressing process |
| CN113278755A (en) * | 2021-06-02 | 2021-08-20 | 维泰(南通)金属材料有限公司 | Method for improving metallization rate in steel solid waste smelting reduction process |
| CN114875236A (en) * | 2022-05-17 | 2022-08-09 | 新源县渣宝环保技术有限公司 | Method for producing high-strength pellets by using steel slag fine powder |
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| CN108642231A (en) * | 2018-05-15 | 2018-10-12 | 鞍钢股份有限公司 | A kind of converter slag modifier and the method using its obtained low alkalinity slag system |
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| CN111154972A (en) * | 2020-01-21 | 2020-05-15 | 鞍钢股份有限公司 | Preparation method of spherical granular iron for steelmaking |
| CN111893297A (en) * | 2020-08-06 | 2020-11-06 | 河北蓝海智投环保科技有限公司 | Preparation method of cold-pressed block of converter fly ash |
| CN111893297B (en) * | 2020-08-06 | 2021-05-11 | 河北蓝海智投环保科技有限公司 | Preparation method of cold-pressed block of converter fly ash |
| CN112174470A (en) * | 2020-09-30 | 2021-01-05 | 宝钢湛江钢铁有限公司 | Treatment method of cold-rolled oily sludge |
| CN112981095A (en) * | 2021-02-08 | 2021-06-18 | 山西太钢不锈钢股份有限公司 | Iron scale ball pressing process |
| CN113278755A (en) * | 2021-06-02 | 2021-08-20 | 维泰(南通)金属材料有限公司 | Method for improving metallization rate in steel solid waste smelting reduction process |
| CN114875236A (en) * | 2022-05-17 | 2022-08-09 | 新源县渣宝环保技术有限公司 | Method for producing high-strength pellets by using steel slag fine powder |
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Denomination of invention: Low energy consumption cold pressed pellet and its preparation method Effective date of registration: 20220415 Granted publication date: 20190412 Pledgee: China Minsheng Banking Corp Chongqing branch Pledgor: CHONGQING ZHENYAN ENERGY SAVING ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Registration number: Y2022500000019 |
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Denomination of invention: Low energy consumption cold pressed pellets and their preparation methods Effective date of registration: 20230523 Granted publication date: 20190412 Pledgee: China Minsheng Banking Corp Chongqing branch Pledgor: CHONGQING ZHENYAN ENERGY SAVING ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Registration number: Y2023980041528 |
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