CN104250689B - The compound refining manganese furnace charge preparation technology of manganese ore comprehensive utilization can be realized - Google Patents

The compound refining manganese furnace charge preparation technology of manganese ore comprehensive utilization can be realized Download PDF

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CN104250689B
CN104250689B CN201410491755.6A CN201410491755A CN104250689B CN 104250689 B CN104250689 B CN 104250689B CN 201410491755 A CN201410491755 A CN 201410491755A CN 104250689 B CN104250689 B CN 104250689B
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manganese
compound
furnace charge
preparation technology
ore
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CN104250689A (en
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王文娟
赵强
宁顺明
佘宗华
封志敏
邢学永
万洪强
吴江华
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Changsha Research Institute of Mining and Metallurgy Co Ltd
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Changsha Research Institute of Mining and Metallurgy Co Ltd
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Abstract

The invention discloses a kind of compound refining manganese furnace charge preparation technology realizing manganese ore comprehensive utilization, comprise the following steps: add water fine fraction manganic concerntrate, binding agent and fuel mixing, and mixed compound A is made on pelletizer pelletizing feed;Separately take powder manganese ore, flux and fuel, add water and carry out dispensing, and in mixer, carry out mixed once, obtain compound B;Again being mixed in mixer with compound B by above-mentioned prepared pelletizing feed, mixing is placed on sintering machine and carries out cloth, lights a fire, sinters, and granulate prepares acidic pellet ore and embeds the compound refining manganese furnace charge of high basicity sinter after cooling.The technique of the present invention is simple, low cost, can be substantially improved the breathability of sinter bed, improves the level that utilizes of fine fraction manganic concerntrate, improves vertical sintering speed and usage factor.

Description

The compound refining manganese furnace charge preparation technology of manganese ore comprehensive utilization can be realized
Technical field
The invention belongs to the preprocessing technical field of field of metallurgy Mineral Material, especially and the preparation technology of a kind of compound refining manganese furnace charge.
Background technology
The purposes of manganese widely, is a kind of important raw material of industry.In modern society, manganese and compound thereof are in metallurgical, change The sector applications such as work, light industry, medicine, machinery, national defence, communication, agricultural are more and more extensive.In steel and iron industry, the use of manganese Amount is only second to ferrum, and the manganese of 90% is consumed in steel and iron industry, and owing to manganese is the biggest with the affinity of oxygen and sulfur, therefore manganese is to make steel Deoxidizer in journey, desulfurizing agent;Manganese energy reinforced ferrite and refinement pearlite, therefore intensity and the quenching degree of steel can be improved, thus Also it is one of good alloy element.In terms of nonferrous metallurgy, manganese oxide ore can be as the oxidant in hydrometallurgy.Chemistry Industrial main manganese ore produces manganese dioxide, manganese sulfate, potassium permanganate, secondly for producing manganese carbonate, manganese nitrate and chlorine Change manganese etc..
China's manganese resource is poor, and manganese ore grade is on the low side, and the average grade of manganese is about 22%.Along with substantial amounts of exploitation, China Manganese ore abundant ore source falls sharply, and available manganese resource only accounts for possesses the 43% of total resources, it is impossible to meet domestic production Mn series alloy Needing, domestic manganese resource is constantly in tense situation, the most in recent years the developing rapidly of steel industry, the manganese of domestic production Ore deposit, far from meeting requirement, needs a large amount of imports every year.It is reported, China's manganese ore gross reserves only has 7.11 hundred million tons, accounts for the world The 5% of reserves, and wherein rich manganese ore only accounts for the 6%~8% of whole resource reserve.The most apparently, though China has a certain amount of manganese Ore resources, but Manganese Ore Grade is low, and impurity content is high, need to carry out ore dressing process.Therefore, utilize the most efficiently fine-graded Manganese concentrate selection, optimizes the agglomeration technology of manganese concentrate selection, is to reduce China's mn site doping production cost, raising mn site doping city One of effective measures of field competitiveness.
Existing manganese mineral powder agglomeration method mainly includes briquetting, sintering and three kinds of techniques of pelletizing.At present, manganese ore agglomeration is many in the world Use sintering process.In these several main agglomeration methods, briquetting method technique is simple, production cost is low, environment good, but product Belonging to raw material, its high-temperature behavior is not so good as pelletizing method and sintering process;Pelletizing method is due to complex process, and the manufacturer of employing is few; And manganese sinter has other method for pretreating and do not has the advantage that: as high in sinter strength, epigranular, be conducive to improving follow-up The breathability of blast furnace.But, manganese mineral powder normal sintering yet suffers from solid fuel consumption height, sinter strength is not met by wanting The problem, the especially balling-up of particulate manganese mineral powder such as asking and yield poorly poor, sintering output is lower;And, sintered in manganese mineral powder Cheng Zhong, EGT is the highest, has a strong impact on service life of equipment.
Therefore, developing new manganese ore agglomeration process and be always the problem of those skilled in the art's research, it is to limited manganese resource Efficiently utilize significant.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, it is provided that a kind of technique is simple, low cost, can be significantly Improve the breathability of sinter bed, increase fine fraction manganic concerntrate and utilize, significantly improve the compound of vertical sintering speed and usage factor Refining manganese furnace charge preparation technology.
For solving above-mentioned technical problem, the technical scheme that the present invention proposes is a kind of compound refining manganese stove realizing manganese ore comprehensive utilization Material preparation technology, comprises the following steps:
Produce pelletizing feed: add water mixing by fine fraction manganic concerntrate, binding agent and fuel, by mixed compound A at pelletizer On make pelletizing feed;
Produce compound B: separately take powder manganese ore, flux and fuel, add water and carry out dispensing, and in mixer, carry out mixed once, Obtain compound B;
Complex sintered: again to be mixed in mixer with compound B by above-mentioned prepared pelletizing feed, mixing is placed on sintering Carrying out cloth on machine, light a fire, sinter, granulate prepares acidic pellet ore and embeds the compound refining manganese stove of high basicity sinter after cooling Material, completes agglomeration.
Above-mentioned compound refining manganese furnace charge preparation technology, preferably: described fine fraction manganic concerntrate refer to-0.074mm content more than 40%, The manganese grade manganese ore raw material more than 30%;Described powder manganese ore refers to the manganese ore raw material that granularity is 0~8mm.It is furthermore preferred that described carefully Grade manganic concerntrate controls 2: 8~7: 3 with the mass ratio of described powder manganese ore.
In above-mentioned compound refining manganese furnace charge preparation technology, it is preferred that described flux is quick lime, limestone, slaked lime, white clouds One or more in stone, and the granularity of flux is less than 3mm, the consumption of flux is the 0.5%~8% of powder manganese ore quality.
In above-mentioned compound refining manganese furnace charge preparation technology, preferred: described in produce in the raw material of pelletizing feed without flux, with Just prepare acidic pellet ore, embed high basicity sinter for subsequent acidic pellet and basis is provided.
In above-mentioned compound refining manganese furnace charge preparation technology, it is preferred that described binding agent selects bentonite, the consumption of described binding agent For described fine fraction manganic concerntrate quality 0.6%~3.0%.
In above-mentioned compound refining manganese furnace charge preparation technology, it is preferred that described Fuel Selection coke powder and/or anthracite, and the grain of fuel Degree less than 3mm, the consumption of fuel be all raw material containing manganese (including fine fraction manganic concerntrate, powder manganese ore etc.) quality 2.0%~ 10.0%.
In above-mentioned compound refining manganese furnace charge preparation technology, it is preferred that the Task-size Controlling of described pelletizing feed is 8~16mm.
In above-mentioned compound refining manganese furnace charge preparation technology, it is preferred that in described complex sintered step, the bed depth of sintering machine >= 500mm, firing temperature is 1050 DEG C~1150 DEG C, and the duration of ignition is 1min~3min, and igniting negative pressure is 4kPa~6kPa, Sintering negative pressure is 8kPa~12kPa.
In the above-mentioned compound refining manganese furnace charge preparation technology of the present invention, first by separately made for fine fraction manganic concerntrate pelletizing feed, then with coarse grain Powder manganese ore and other raw materials mixing, be then taped against routine sintering machine on be sintered or roasting, make by acidic pellet ore embedding The compound refining manganese furnace charge entering high basicity sinter and form, it is achieved follow-up blast furnace high-quality, high yield and low energy consumption produce.
Compared with prior art, it is an advantage of the current invention that:
(1) present invention achieves the most efficiently utilizing existing raw material containing manganese: use the preparation technology of the present invention, will originally only Can be used on a small quantity sintering fine fraction manganic concerntrate as acid pellet raw materials for production, and by powder manganese ore as alkalescence sintering deposit the most former Material, is prepared by being combined that acidic pellet ore and high basicity sinter form by complex sintered technique on a sintering machine simultaneously Lump ore, increases the use ratio of fine fraction manganic concerntrate, makes different types of raw material containing manganese obtain more Appropriate application, improves raw material The suitability.
(2) in the preparation technology of the present invention, sintering deposit is different with pellet mineralization machanism, and sintering deposit with liquid bonding phase is mainly Main, pellet then based on solid phase consolidation, is combined with liquid bonding phase by solid phase consolidation, can not reduce product quality Under the conditions of reduce the total alkalinity of raw material.The high basicity sinter simultaneously obtained and acidic pellet ore, the two is an entirety, it is ensured that Composite agglomeration ore deposit has higher intensity.
(3) by using the preparation technology of the present invention, make the green pellets material after pelletizing and mixed granulation powder composition sintering former Material, effectively overcomes in conventional sintering technique that fine fraction manganic concerntrate bed permeability in sintering process is poor, granulating efficiency is poor, burning The shortcomings such as knot poor performance, can be substantially improved the breathability of sinter bed, significantly improve vertical sintering speed and usage factor, save The consumption of solid fuel.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the present invention.
Detailed description of the invention
For the ease of understanding the present invention, below in conjunction with Figure of description and preferred embodiment, the present invention is made more comprehensively, careful Ground describes, but protection scope of the present invention is not limited to embodiment in detail below.
Unless otherwise defined, the implication that all technical term used hereinafter is generally understood that with those skilled in the art is identical. Technical term used herein is intended merely to describe the purpose of specific embodiment, is not intended to limit the protection model of the present invention Enclose.
Except there being special instruction, the various raw materials used in the present invention, equipment are can commodity commercially or permissible The product prepared by known method.
Embodiment 1:
The compound refining manganese furnace charge preparation technology of the realized manganese ore comprehensive utilization of a kind of present invention as shown in Figure 1, comprises the following steps:
1) pelletizing feed is produced: by certain fine fraction manganic concerntrate (original ore size consists of-0.074mm 85.3%), binding agent and fuel Add water mixing, and mixed compound A is made on pelletizer pelletizing feed;Bentonite selected by binding agent, and its consumption is particulate The 1.2% of level manganic concerntrate quality;Fuel Selection coke powder, the granularity of coke powder is less than 3mm, and the consumption of coke powder is fine fraction manganic concerntrate matter The 2.5% of amount;Pelletizing feed water content is 9.5%;It is 5.6 times that Balling time controls the shatter strength of green pellet after 13min, pelletizing / 0.5m, comprcssive strength 12.4N/, burst temperature is 385 DEG C;
2) compound B is produced: separately take powder manganese ore (the manganese ore raw material less than 8mm), flux and fuel and add water and carry out dispensing, and Carry out mixed processing by conventional sintering technique, obtain compound B;Limestone selected by flux, and the granularity of flux is less than 3mm, molten The consumption of agent is the 4.58% of powder manganese ore quality, and after interpolation, basicity is 3.0;Fuel Selection coke powder, the granularity of coke powder is less than 3mm, The consumption of coke powder is the 8.8% of powder manganese ore quality;Proportioning of returning mine is the 15% of powder manganese ore, compound B aqueous 9.6%;
3) complex sintered: above-mentioned prepared pelletizing feed to be carried out mixing to obtain compound C again with compound B, and controls fine fraction The mass ratio of manganic concerntrate and powder manganese ore is 1: 3, and compound C dual alkalinity is 2.35, mixing be placed on sintering machine carry out cloth, Igniting, sintering, bed depth is 500mm, firing temperature 1100 DEG C, negative pressure 5kPa of lighting a fire, and the duration of ignition, 1.5min, burnt Knot negative pressure is 10kPa, and granulate must be combined refining manganese furnace charge after cooling, completes agglomeration.
The index of the finished product sintering deposit that the present embodiment prepares is as follows: drum strength 63.3%, yield rate 84.3%, usage factor 1.88t/m2H, solid burnup 67kg/t.And the manganese ore of the fine fraction manganic concerntrate of above-mentioned the present embodiment and powder manganese ore in mass ratio 1: 3 If sample ore does not carry out complex sintered, the index of finished product sintering deposit being directly sintered obtaining under identical sintering condition is as follows: Drum strength 52.4%, yield rate 70.6%, usage factor 0.48t/m2H, solid burnup is 87.9%, it can be seen that, this Bright can make the indices General Promotion of final finished sintering deposit by simple pretreatment cleverly, effect is the most notable.
Embodiment 2:
The compound refining manganese furnace charge preparation technology of the realized manganese ore comprehensive utilization of a kind of present invention, comprises the following steps:
1) pelletizing feed is produced: by certain fine fraction manganic concerntrate (original ore size consists of-0.074mm 83.5%), binding agent and fuel Add water mixing, and mixed compound A is made on pelletizer pelletizing feed;Bentonite selected by binding agent, and its consumption is particulate The 1.5% of level manganic concerntrate quality;Fuel Selection coke powder, the granularity of coke powder is less than 3mm, and the consumption of coke powder is fine fraction manganic concerntrate matter The 2.5% of amount;Pelletizing feed water content is 8.5%;It is 4.8 times that Balling time controls the shatter strength of green pellet after 13min, pelletizing / 0.5m, comprcssive strength 11.47N/, burst temperature is 415 DEG C;
2) compound B is produced: separately take powder manganese ore (the manganese ore raw material less than 8mm), flux and fuel and add water and carry out dispensing, and Carry out mixed processing by conventional sintering technique, obtain compound B;Quick lime selected by flux, and the granularity of flux is less than 3mm, molten The consumption of agent is the 4.13% of powder manganese ore quality, and after interpolation, basicity is 3.1;Fuel Selection coke powder, the granularity of coke powder is less than 3mm, The consumption of coke powder is the 9.9% of powder manganese ore quality;Proportioning of returning mine is the 18% of powder manganese ore, the moisture 9.3% of compound B;
3) complex sintered: above-mentioned prepared pelletizing feed to be carried out mixing to obtain compound C again with compound B, and controls fine fraction The mass ratio of manganic concerntrate and powder manganese ore is 3: 5, and compound C dual alkalinity is 1.98, mixing be placed on sintering machine carry out cloth, Igniting, sintering, bed depth is 700mm, firing temperature 1100 DEG C, negative pressure 5kPa of lighting a fire, and the duration of ignition, 1.5min, burnt Knot negative pressure is 10kPa, and granulate must be combined refining manganese furnace charge after cooling, completes agglomeration.
The index of the finished product sintering deposit that the present embodiment prepares is as follows: drum strength 64.1%, yield rate 83.4%, usage factor 1.93t/m2H, solid burnup 55.5kg/t.And the manganese of the fine fraction manganic concerntrate of above-mentioned the present embodiment and powder manganese ore in mass ratio 3: 5 If ore deposit sample ore does not carry out complex sintered, the index of finished product sintering deposit being directly sintered obtaining under identical sintering condition is as follows: Drum strength 48.8%, yield rate 68.5%, usage factor 0.44t/m2H, solid burnup is 99.2%.As can be seen here, this Bright can make the indices General Promotion of final finished sintering deposit by simple pretreatment cleverly, effect is the most notable.
From above-described embodiment it can be seen that the compound refining manganese furnace charge preparation technology of the present invention compares the former manganese ore sample ore comparative example Sintering process, the drum strength of finished product sintering deposit strengthens, and yield rate improves, and usage factor increases, and solid burnup significantly reduces. Intensity and the quality of finished product sintering manganese ore are all greatly improved.

Claims (8)

1. can realize a compound refining manganese furnace charge preparation technology for manganese ore comprehensive utilization, comprise the following steps:
Produce pelletizing feed: add water mixing by fine fraction manganic concerntrate, binding agent and fuel, and mixed compound A is made on pelletizer pelletizing feed;
Produce compound B: separately take powder manganese ore, flux and fuel, add water and carry out dispensing, and in mixer, carry out mixed once, obtain compound B;
Complex sintered: above-mentioned prepared pelletizing feed is mixed in mixer again with compound B, mixing is placed on sintering machine and carries out cloth, lights a fire, sinters, bed depth >=500 mm of described sintering machine, firing temperature is 1050 DEG C~1150 DEG C, the duration of ignition is 1min~3min, igniting negative pressure is 4kPa~6kPa, and sintering negative pressure is 8kPa~12kPa, and granulate prepares acidic pellet ore and embeds the compound refining manganese furnace charge of high basicity sinter after cooling.
Compound refining manganese furnace charge preparation technology the most according to claim 1, it is characterised in that: described fine fraction manganic concerntrate refers to the manganese ore raw material that-0.074mm content is more than 40%, manganese grade is more than 30%;Described powder manganese ore refers to the manganese ore raw material that granularity is 0~8mm.
Compound refining manganese furnace charge preparation technology the most according to claim 1, it is characterised in that: described fine fraction manganic concerntrate controls 2: 8~7: 3 with the mass ratio of described powder manganese ore.
4. according to the compound refining manganese furnace charge preparation technology described in claim 1 or 2 or 3, it is characterized in that: described flux is one or more in quick lime, limestone, slaked lime, dolomite, and the granularity of flux is less than 3mm, the consumption of flux is the 0.5%~8% of powder manganese ore quality.
Compound refining manganese furnace charge preparation technology the most according to claim 4, it is characterised in that produce described in: in the raw material of pelletizing feed without flux.
6. according to the compound refining manganese furnace charge preparation technology described in claim 1 or 2 or 3, it is characterised in that: bentonite selected by described binding agent, and the consumption of described binding agent is the 0.6%~3.0% of described fine fraction manganic concerntrate quality.
7. according to the compound refining manganese furnace charge preparation technology described in claim 1 or 2 or 3, it is characterised in that: described Fuel Selection coke powder and/or anthracite, and the granularity of fuel is less than 3mm, the consumption of fuel is the 2.0%~10.0% of all raw material containing manganese quality.
8. according to the compound refining manganese furnace charge preparation technology described in claim 1 or 2 or 3, it is characterised in that: the Task-size Controlling of described pelletizing feed is 8~16mm.
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Publication number Priority date Publication date Assignee Title
CN105331805B (en) * 2015-09-24 2017-09-29 中南大学 The method for preparing ferric manganese ore composite sinter
CN105219953B (en) * 2015-09-24 2018-06-01 中南大学 A kind of ferric manganese ore powder sintering matches somebody with somebody the method for ore deposit
CN113564352B (en) * 2021-07-28 2022-04-01 北京科技大学 Method for producing high-quality sintering ore by using multiple manganese ore powder ore blending

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CN101407858A (en) * 2008-11-20 2009-04-15 云南文山斗南锰业股份有限公司 Preparation of carbonaceous composite pellet containing manganese
CN102373331A (en) * 2011-09-29 2012-03-14 云南文山斗南锰业股份有限公司 Manganese series composite pellet and preparation method thereof
CN103014326A (en) * 2012-12-28 2013-04-03 长沙矿冶研究院有限责任公司 Sintering process of manganese ore powder
CN103114201A (en) * 2013-02-06 2013-05-22 中南大学 Agglomeration method for iron containing dust slime of iron and steel plants

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101407858A (en) * 2008-11-20 2009-04-15 云南文山斗南锰业股份有限公司 Preparation of carbonaceous composite pellet containing manganese
CN102373331A (en) * 2011-09-29 2012-03-14 云南文山斗南锰业股份有限公司 Manganese series composite pellet and preparation method thereof
CN103014326A (en) * 2012-12-28 2013-04-03 长沙矿冶研究院有限责任公司 Sintering process of manganese ore powder
CN103114201A (en) * 2013-02-06 2013-05-22 中南大学 Agglomeration method for iron containing dust slime of iron and steel plants

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