CN103801548A - Gradient utilization method of high-sulfur low-silicon iron tailings - Google Patents
Gradient utilization method of high-sulfur low-silicon iron tailings Download PDFInfo
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- CN103801548A CN103801548A CN201310719086.9A CN201310719086A CN103801548A CN 103801548 A CN103801548 A CN 103801548A CN 201310719086 A CN201310719086 A CN 201310719086A CN 103801548 A CN103801548 A CN 103801548A
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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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
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Abstract
The invention relates to a gradient utilization method of high-sulfur low-silicon iron tailings. The gradient utilization method comprises the following steps: (1) sieving by utilizing a 60-80-mesh sieve, wherein about 70% of tailings are remained on the sieve, and about 30% of tailings are sieved; (2) preparing a standard cement mortar product from the about 70% of rough tail sand on the sieve instead of 50-60% of river sand; and (3) separating 6.14% of sulfur ore concentrate from the about 30% of sieved fine tailings by virtue of flotation desulfurization so as to prepare sulfuric acid, carrying out iron separation on 24.6% of fine sand by utilizing a strong magnetic separation technique after the sulfur separation, preparing a high-activity tailing slag admixture by utilizing the residual 7.14% of high-silicon-content tail sand after the iron separation, and directly utilizing 17.47% of high-iron-content tail sand separated through the strong magnetic separation as a raw material to sinter cement in a cement plant, wherein the sulfur grade of the sulfur ore concentrate reaches 44.65%, and the iron grade of high-content iron slag remained after the sulfuric acid preparation reaches 63%. According to the gradient utilization method, the utilization range of the iron tailings is extended from barren rock and iron tailing sand obtained in a mountain cutting process to the tailing slag admixture, so that 100% gradient utilization of mine waste is realized.
Description
Technical field
The invention belongs to iron tailings comprehensive utilization of resources technical field, be specifically related to a kind of step comprehensive utilization of resources method of high-sulfur low-silicon iron mine tailing.
Background technology
China is a mining powers, the mine tailing burden and the discharge capacity that produce because of exploitation mineral resources are every year very huge, approximately 5,000,000,000 tons of the annual mine tailing amounts producing in countries in the world, and China only 2000 the end of the year ore deposit generation just reach 600,000,000 tons of left and right, the grade of the most of mine resources of China is lower, in beneficiation flowsheet, discharge a large amount of mine tailings, along with mineral resources are utilized the raising of degree, ore can the corresponding reduction of mining grade, mine tailing discharge rate is also increasing, at present, the mine tailing that China's metal mine is stored up approximately has 10,000,000,000 tons, and increasing with the speed of annual output 8 ~ 1,000,000,000 ton mine tailing, wherein: iron ore mine year produces mine tailing just 6 ~ 700,000,000 tons, and China's comprehensive utilization of tailing rate only has 10% left and right at present, a large amount of mine tailings can only be deposited in Tailings Dam or some natural places, so many mine tailing has inevitably brought a series of problem, it has not only taken a large amount of soils, and mining area ecological environment is caused to serious harm.
At present iron tailings comprehensive utilization concentrates on building material industry, as utilizes iron tailings to prepare various non-burning brick, hollow bricks, colour floor tile, steam-pressing brisk and fired brick; Utilize iron tailings to serve as fine aggregate or fine aggregate production concrete and concrete hollow block; Utilize CHARACTERISTICS OF TAILINGS SAND to prepare glass or devitrified glass is also developed and applied.
Iron tailings utilizes approach to have research at home and abroad as cement slurry, devitrified glass and ceramic raw material, brick producing material, concrete coarse-fine aggregate and various mortar fine aggregates etc., but still has a lot of problems.
Iron tailings is due to from different places, its minerals commonly used in chemical industry composition there are differences, for the exploitation of different enterprises and the difference of ore dressing mechanism, and the iron tailings physical property difference of discharging, for the qualitative difference of each enterprise iron tailings, also variant as the approach of building material field application.
Iron tailings is produced concrete base building material as fine aggregate, can only partly replace fine aggregate because its grain diameter is little, content of stone powder is high, or prepare the concrete base building material that strength mark is lower (masonry mortar or low-grade concrete), aggregate size is required, thinner mortar research is also few.
Both at home and abroad iron tailings is used in concrete base building material at present, major part selects the mine tailing of modulus of fineness within the scope of medium sand and fine sand to apply, and the modulus of fineness of in fact most of iron tailings sand is in special fine sand scope, because its content of stone powder has exceeded building sand scope and has not been well used compared with high, if utilize mine tailing and natural sand or Machine-made Sand compound use, just can expand the scope of application of mine tailing.
Summary of the invention
The object of the invention is the problem existing in building material industry application for current iron tailings, take the high efficiente callback of valuable component in iron tailings and utilization, high added value entirety utilize and large construction material of producing green, environmental protection as target, solve the problem of iron tailings comprehensive utilization value and utilization rate aspect, a kind of stepped utilization method of high-sulfur low-silicon iron mine tailing is provided.
Technical solution of the present invention is: first taking point granularity to extract has a valency component in iron tailings, and then by varigrained iron tailings, is respectively used to produce green building material and high added value material.
For the iron tailings of the coarseness sub-electing, sulfur content reaches the standard of building sand, can be used for replacing river sand to produce premixing dry-mixed mortar and air-entrained concrete building block.
For the fine grained iron tailings sub-electing, due to the character of mineral itself, most of sulphur and iron are all in fine grain iron tailings.Fine grained mine tailing is carried out to ore dressing processing, selects sulphur concentrate, can be used as product and sell, remaining fine grained after sulphur removal, then select iron processing, the high mine tailing of iron content sub-electing, can be directly as the raw material of the mud of heating up water; The mine tailing that remaining iron content is low, by adding exciting agent to excite its activity, then grinding (mechanical activation), prepares highly active unburned mine tailings admixture, can do concrete admixture, also can make the admixture of air-entrained concrete building block and premixing dry-mixed mortar.The present invention has realized the efficient cascade utilization pattern of utilizing of iron tailings 100%.
Object of the present invention realizes by following steps.
1, iron tailings is carried out to physical and chemical composition analysis, and its radioactivity of multi-point sampler on the spot.
2, the relation of the granularity of research iron tailings and sulphur, iron content, adopt sieve 20,40,60,80,100 orders of certain order number to sieve, testing respectively on sieve Fe, the S dividing in part and lower part of screen, the content of Si, sulfur content, the silicone content of selecting the upper part of sieve can meet the order number that building material industry requires, and can carry out recycling as target take what guarantee thick tailings; Lower part of screen is divided into the thin tailings of sulphur and iron enrichment, for the lower thin tailings of sieve, first carries out the research of floatation desulphurization, and enrichment sulphur concentrate, then to selecting the further high intensity magnetic separation separation of iron of thin tailings of over cure.
3, point granularity is extracted having after valency component in iron tailings, and varigrained iron tailings is respectively used to produce green building material and high added value material.Because the tailings granularity of Nanshan Mine is thinner, be 0.82 according to the modulus of fineness of the standard detection iron milltailings of building sand, belong to the scope of fine sand, therefore for the upper iron tailings partly of sieve, can utilize the barren rock (preparing artificial sand) cutting into a mountain, form continuous grading, prepare premixing dry-mixed mortar.
4, the iron tailings dividing for lower part of screen, due to the character of mineral itself, most of sulphur and iron all concentrate in the iron tailings dividing lower part of screen.This part mine tailing is carried out to ore dressing processing, sulphur concentrate Ts >=35% of selecting, iron ore concentrate TFe >=61%, can be used as iron ore concentrate, the sale of sulphur concentrate product.Select remaining fine grained after over cure and iron, activates and prepare unburned mine tailings admixture by physics (mechanical grinding) chemistry (interpolation chemical agent) method.
5, because the overall granularity of iron tailings sand of Nanshan Mine is less, the overwhelming majority all, below 0.6mm, belongs to the scope of fine sand, further levigate after, can be used for replacing 70% ~ 80% river sand to produce air-entrained concrete building block.
Utilize with respect to existing disclosed iron tailings building materials field, the present invention has following outstanding feature.
1, by iron tailings according to different grain size cascade utilization, sieve by selected order number, to different-grain diameter classification utilize, the mine tailing amount that reclaims iron and sulphur by ore dressing has reduced approximately 70%, has reduced cost, has improved utilization ratio.
2, the thick part of CHARACTERISTICS OF TAILINGS SAND can be used as building sand for concrete or mortar, alleviate the present situation in short supply of sand resource, but the tailings modulus of fineness after deironing sulphur removal is less, do not meet concrete or mortar sand standard, this part CHARACTERISTICS OF TAILINGS SAND grinding, to certain fineness, is excited to its activity by adding exciting agent, prepare unburned mine tailings admixture, be applied in concrete or other building material made, can alleviate the present situation of current admixture shortage.
3, premixing dry-mixed mortar has been broken through the conventional understanding of only utilizing CHARACTERISTICS OF TAILINGS SAND, barren rock and the iron tailings sand of the scope of utilization from cutting into a mountain, then to mine tailings admixture, realized 100% cascade utilization of mine solid waste.
Accompanying drawing explanation
Fig. 1 is iron tailings cascade utilization route map.
The specific embodiment
Below in conjunction with example, the present invention will be further described.
The present embodiment is take Ma ' anshan City Nanshan Mine as example, and Ma ' anshan City Nanshan Mine is the iron ore base of China's East China maximum, is positioned at Xiang Shan town, Maanshan City, and year last person ore deposit, mining area will reach 1,000 ten thousand tons.2010,7.88 hundred million tons of iron ore deposit amounts were possessed in mining area, but iron ore grade is very low, the exploitation of low-grade iron ore, by producing a large amount of iron tailings, estimates at more than 500,000,000 ton, add more than the 100000000 ton of iron tailings of storing up in early days, Nanshan Mine is by the problem that occurs that a large amount of mine tailings are stored up without ground.
The problem of storing up for Nanshan Mine iron tailings, the invention provides a kind of stepped utilization method, carries out according to following steps.
1, South Mountain iron tailings composition and radiological measuring, South Mountain CHARACTERISTICS OF TAILINGS SAND main component is as shown in table 1 below.
Table 1 Nanshan Mine CHARACTERISTICS OF TAILINGS SAND composition
| Fe 2O 3（%） | Al 2O 3（%） | SiO 2（%） | SO 3（%） | CaO（%） | K 2O（%） | Na 2O（%） |
| 11.16 | 14.20 | 44.72 | 3.46 | 6.39 | 0.50 | 4.92 |
As shown in Table 1, than other mine tailings, South Mountain CHARACTERISTICS OF TAILINGS SAND belongs to a kind of high-sulfur low-silicon iron mine tailing, the content of sulphur, considerably beyond the requirement of " building sand " standard medium sulphide content and ferrous sulfate content < 0.5%, becomes the critical technical barrier that restriction Nanshan Mine iron milltailings utilizes; Radiological measuring result shows that this iron milltailings radioactivity is up to standard, and this CHARACTERISTICS OF TAILINGS SAND can be applicable to building materials field.
2, iron tailings efficient separation reclaims valuable component
Extract and wherein have valency component sulphur concentrate and iron ore concentrate for the low silicon tailings of this type of high-sulfur, adopt 60 ~ 80 object sieves to sieve, on sieve, partly account for 70%, lower part of screen is divided and is accounted for 30%.For the lower thin tailings of sieve, carry out floatation desulphurization enrichment sulphur concentrate, the thin tailings after desulfurization is passing through high intensity magnetic separation deironing, and the thin tailings after desulfurization and deferrization activates the unburned mine tailings admixture of preparation by physico-chemical process.
3, on sieve, part is utilized
On sieve, part is about 70% thick tailings, wherein sulfur content is less than 1% by analysis, it substitutes 50 ~ 60% river sand preparation standard mortars, 3d, 7d, 28d intensity is suitable with standard mortar intensity, there is no the phenomenon of swelling cracking by long-term observation, preliminary judgement can be used as building sand, for building material made.
4, utilization is divided in lower part of screen
Lower part of screen is divided and is about 30% for thin mine tailing, sulfur content is 9.62%, iron content is 16.28%, can select the sulphur concentrate that accounts for former iron milltailings quality 6.14% by floatation desulphurization, its sulphur grade can reach 44.65%, the sulphur concentrate of selecting can be prepared sulfuric acid for sulfuric acid plant, and after sulfuric acid processed, remaining high scum iron grade reaches 63%, and sulphur concentrate and high scum can sell as product.Select 24.6% later fine sand of sulphur, select iron by high intensity magnetic separation technology, select the iron high tailings of residue 7.14% silicone content later, wherein silicone content is 61.29%, and this part is through mechanochemical reaction stimulating activity, then grinding (mechanical activation), prepare highly active unburned mine tailings admixture, can directly do product and sell, for concrete microfine mineral admixture or prepare finished cement for cement mixture, also can inner utilization do the raw material of air-entrained concrete building block or premixing dry-mixed mortar; The high tailings of 17.47% iron content that high intensity magnetic separation sub-elects, wherein iron content is 20.12%, this part tailings can be directly as the raw material cement baking in cement plant.
Claims (1)
1. a stepped utilization method for high-sulfur low-silicon iron mine tailing, for Ma ' anshan City Nanshan Mine iron tailings, iron tailings composition Fe
2o
3: 11.16%; Al
2o
3: 14.20%; SiO
2: 44.72%; SO
3: 3.46%; CaO:6.39%; K
2o:0.50%; Na
2o:4.92%, its characterization step is: 1, adopt 60 ~ 80 object sieves to sieve, on sieve, partly account for 70%, lower part of screen is divided and accounted for 30%; 2, on sieve, part is utilized: on sieve, part is about 70% thick tailings, and wherein sulfur content is less than 1%, and it substitutes 50 ~ 60% river sand preparation standard mortars; 3, utilization is divided in lower part of screen: lower part of screen is divided and is about 30% for thin mine tailing, and sulfur content is 9.62%, and iron content is 16.28%; Can select the sulphur concentrate that accounts for former iron milltailings quality 6.14% by floatation desulphurization, its sulphur grade can reach 44.65%, the sulphur concentrate of selecting can be used for preparing sulfuric acid, and after sulfuric acid processed, remaining high scum iron grade reaches 63%, and sulphur concentrate and high scum can sell as product; Select 24.6% later fine sand of sulphur, select iron by high intensity magnetic separation technology, select the iron high tailings of residue 7.14% silicone content later, wherein silicone content is 61.29%, and this part is through mechanochemical reaction stimulating activity, then grinding (mechanical activation), prepare highly active unburned mine tailings admixture, can directly do product and sell, for concrete microfine mineral admixture or prepare finished cement for cement mixture, also can inner utilization do the raw material of air-entrained concrete building block or premixing dry-mixed mortar; The high tailings of 17.47% iron content that high intensity magnetic separation sub-elects, wherein iron content is 20.12%, this part tailings can be directly as the raw material cement baking in cement plant.
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Cited By (8)
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| CN104117524A (en) * | 2014-05-28 | 2014-10-29 | 郑祥余 | Method for recycling iron tailing sand |
| CN107298561A (en) * | 2017-07-28 | 2017-10-27 | 大连地拓环境科技有限公司 | A kind of iron tailings barren rock resource utilization method |
| CN108191336A (en) * | 2018-01-21 | 2018-06-22 | 李肇炯 | A kind of metal tail slag regeneration benefit clay and its production method |
| CN108892462A (en) * | 2018-07-23 | 2018-11-27 | 中煤地质工程有限公司北京水工环地质勘查院 | A method of high-strength concrete is prepared using granite barren rock and Low-silica iron ore tailings |
| CN109647617A (en) * | 2018-12-28 | 2019-04-19 | 江西省宜丰万国矿业有限公司 | A kind of method that non-ferrous metal underground mine tailing proposes iron sulfur reduction |
| CN110342845A (en) * | 2019-06-19 | 2019-10-18 | 张晓夫 | Utilize the method for iron tailings slag production sand |
| CN112756103A (en) * | 2020-11-27 | 2021-05-07 | 泗水惠丰农业开发工程有限公司 | Method for processing fine sand by mixing iron tailings and crusher-made sand |
| CN113968704A (en) * | 2021-11-10 | 2022-01-25 | 湖南绿生永固新材料有限公司 | Method for preparing baking-free brick by using iron tailings and waste residues |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104117524A (en) * | 2014-05-28 | 2014-10-29 | 郑祥余 | Method for recycling iron tailing sand |
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| CN108191336A (en) * | 2018-01-21 | 2018-06-22 | 李肇炯 | A kind of metal tail slag regeneration benefit clay and its production method |
| CN108892462A (en) * | 2018-07-23 | 2018-11-27 | 中煤地质工程有限公司北京水工环地质勘查院 | A method of high-strength concrete is prepared using granite barren rock and Low-silica iron ore tailings |
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| CN109647617B (en) * | 2018-12-28 | 2021-09-07 | 江西省宜丰万国矿业有限公司 | Method for extracting iron and reducing sulfur from nonferrous metal underground mine tailings |
| CN110342845A (en) * | 2019-06-19 | 2019-10-18 | 张晓夫 | Utilize the method for iron tailings slag production sand |
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| CN112756103A (en) * | 2020-11-27 | 2021-05-07 | 泗水惠丰农业开发工程有限公司 | Method for processing fine sand by mixing iron tailings and crusher-made sand |
| CN113968704A (en) * | 2021-11-10 | 2022-01-25 | 湖南绿生永固新材料有限公司 | Method for preparing baking-free brick by using iron tailings and waste residues |
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