CN104591662A - Method for preparing brick from pyrite cinder magnetic separation mine tailing - Google Patents
Method for preparing brick from pyrite cinder magnetic separation mine tailing Download PDFInfo
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- CN104591662A CN104591662A CN201410644863.2A CN201410644863A CN104591662A CN 104591662 A CN104591662 A CN 104591662A CN 201410644863 A CN201410644863 A CN 201410644863A CN 104591662 A CN104591662 A CN 104591662A
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Abstract
The invention discloses a method for preparing a brick from pyrite cinder magnetic separation mine tailing. The method comprises the following steps of 1, putting sulfuric-acid residue as an initial raw material into a bowl mill, and carrying out ore grinding under the control of slurry concentration in ore grinding and slurry mixing, 2, after ore grinding, feeding the ore slurry into an ore feeding agitating tank of a wet magnet separator under the control of ore slurry concentration, 3, carrying out magnetic separation under the control of fed ore slurry concentration of the magnet separator agitating tank, and ore slurry feeding, medium shocking and fine shocking time, 4, filtering middlings and mine tailing as mine tailing by a filter, putting the filter residue into an oven and carrying out drying, 5, mixing the mine tailing as a raw material, cement, fly ash and lime, 6, adding water, gypsum and additives into the mixture, carrying out stirring to obtain a uniform mixture, carrying out aging and putting the aged product into a mold, and 7, carrying out standing for a day, taking the product out of the mold, putting the product into a maintenance case and carrying out maintenance. The method is simple and practical, has strong comprehensive usability, can produce high-grade iron concentrate, can produce a good-quality non-burnt brick, solves the problems of sulfuric-acid residue stockpiling and environment and creates good economic benefits.
Description
Technical field
The invention belongs to a kind of green technology, by sulfate slag (i.e. pyrite cinder) through magnetic concentration iron wherein, obtain the iron ore concentrate that grade is considerable, utilize magnetic tailing brickmaking simultaneously, effectively can solve storing up and problem of environmental pollution of sulfate slag, turn waste into wealth, make resource obtain comprehensively, fully utilizing.
Background technology
China is gas washing in SA production big country, sulphuric acid output occupies third place in the world, produce sulfuric acid with sulfurous iron ore and account for about 80%, sulfate slag is exactly the waste residue that sulfurous iron ore produces sulfuric acid generation, the pyrite cinder about 2,000 ten thousand tons that China discharges every year, and these pyrite cinders will take about 20,000 mu of soils, cause problem of environmental pollution, along with the exhaustion of resource and the reinforcement of people's environmental consciousness, sight line has been aimed at sulfate slag by people, is also taken seriously the comprehensive utilization of sulfate slag.
Sulfate slag is a kind of waste, but containing a large amount of iron, utilize so main to as if iron wherein, select iron wherein with magnetic separation process, mine tailing is mainly containing silicon-dioxide, and mine tailing can carry out brickmaking by adding some materials.Concentrate and mine tailing utilize simultaneously, achieve the comprehensive utilization of sulfate slag waste resource.
Summary of the invention
The object of the invention is to take pyrite cinder as raw material, through magnetic concentration iron, use mine tailing brickmaking, pyrite cinder is fully utilized.This technique puts into ball mill ore grinding after being sized mixing by pyrite cinder, ore pulp put into wet magnetic separator magnetic separation, dewatered by mine tailing by filter, putting into oven for drying, take mine tailing as raw material, adds a certain amount of cement, the additives such as flyash, through ageing, maintenance is made three and is exempted from brick.
Technical scheme of the present invention is: the method for a kind of pyrite cinder magnetic tailing brickmaking, comprises the following steps:
(1) be initial feed with sulfate slag, be placed in ball mill, control ore grinding and to size mixing concentration, ore grinding;
(2) after ore grinding completes, control pulp density, load wet magnetic separator in the steel basin of ore deposit;
(3) control magnetic separator steel basin feed ore concentration and rush the time to ore deposit, Zhong Chong, essence, carrying out magnetic separation;
(4) chats and mine tailing are all classified as mine tailing, filter through filter, then put into oven for drying;
(5) take mine tailing as raw material, with cement, flyash, lime mixes;
(6) add water, gypsum and admixture, stir, after ageing, put into mould;
(7) place after one day and take out from mould, put into maintaining box maintenance.
Above-mentioned ore grinding concentration of sizing mixing is 20% ~ 40%.
It is 15% ~ 25% that above-mentioned magnetic separator stirs feeding trough feed ore concentration, and to ore deposit time 2 ~ 4s, middlely rush time 8 ~ 10s and essence rushes time 10 ~ 12s, magnetic separation magnetizing current is 5 ~ 10A.
Above-mentioned cement is Portland cement, and the mass ratio of cement consumption and mine tailing consumption is 1:3 ~ 1:5, and the mass ratio of flyash consumption and mine tailing consumption is 1:4 ~ 1:7, and lime is calcium lime powder, and lime consumption is the 1:5 ~ 1:7 of mine tailing consumption.
The mass ratio of above-mentioned amount of water and mine tailing consumption is 1:5 ~ 1:3, and gypsum consumption is that every 1kg mine tailing adds 6 ~ 9g.
Above-mentioned admixture is sodium-chlor and sodium sulfate ratio is the mixture of 1:1, and additive usage is that every 1kg mine tailing adds 5 ~ 10g.
Above-mentioned digestion time is 30min ~ 40min.
Beneficial effect of the present invention:
Pyrite cinder is put into ball mill to be modulated into certain density ore pulp and to carry out ore grinding by the present invention, ore pulp is loaded wet magnetic separator and carries out magnetic separation, then collects mine tailing and puts into oven for drying.Take mine tailing as main raw material, suitably add some cement, the additives such as flyash, through ageing, maintenance is made three and is exempted from brick.
(1) what pyrite cinder content was maximum is ferro element, is secondly exactly element silicon, mainly silicon-dioxide.Sulfate slag fully dissociates through ore grinding, magnetic concentration iron wherein, and the mine tailing selected is mainly containing silicon-dioxide, and iron level secondly.In mine tailing, Iron grade is lower, is difficult to select utilization again, but siliceous more, separately also containing aluminium, and calcium, therefore can be used to brickmaking.
(2) mine tailing that obtains after magnetic separation of pyrite cinder, with cement, after the raw material mixing such as lime, add water, make itself and water react the hydrate generating and have some strength, mainly hydrated calcium silicate and drated calcium aluminate, two kinds of hydrated products and tailings particles cemented together, form skeleton structure, thus make the brick made have some strength.
(3) adding lime and flyash is to add calcium and aluminium, making hydration reaction more complete, the intensity of brick can be improved.
(4) gypsum adds as exciting agent, can promote hydration reaction, and admixture adopts sodium-chlor to add sodium sulfate 1:1, can improve non-burning brick intensity.
(5) in brick-making raw material, great majority are sulfate slag magnetic tailings, and Mine Tailings Utilization reaches more than 60%.
By this technique, magnetic separation is carried out to sulfate slag in sum, the iron ore concentrate that grade is considerable can be obtained, mine tailing can be utilized again to add some other raw material to be made non-burning brick simultaneously, turn waste into wealth, take full advantage of sulfate slag, good economic worth can be createed again simultaneously, solve sulfate slag and store up and problem of environmental pollution.
Accompanying drawing explanation
fig. 1for technical process of the present invention
figure.
Embodiment
Example 1: the sulfate slag 5kg getting iron content 39.77%, put into XMQ-φ 240 × 90 ball mill ore grinding (amount of putting into is less than 500g at every turn) in batches, controlling ore grinding concentration of sizing mixing is 20%, ore grinding 4min, adds the ore deposit of milled that to control feed ore concentration in the magnetic separator feed launder of XCSQ-50 × 70 be 15%, is set to ore deposit time 2s, in rush time 8s, essence rushes time 10s, and magnetizing current is 5A, carries out magnetic separation.The concentrate rate of recovery 76.25%, concentrate Iron grade 55.36%, obtains mine tailing 2261.14g.Mine tailing is placed in drying in oven, obtain mine tailing, add 452g cement (cement and mine tailing are than being 1:5), 323g flyash (flyash and mine tailing are than being 1:7), 323g lime (lime and mine tailing are than being 1:7), stir, abundant mixing, add 452mL water (water and mine tailing mass ratio 1:5), add 13.6g gypsum, the sodium-chlor of 11.3g 1:1 and sodium sulfate, stirring and evenly mixing, ageing 30min, put it in the Standard Module of 240 × 115 × 53mm, take out from mould after 24 hours, put into maintaining box maintenance more than 7 days, the fragment of brick ultimate compression strength obtained and folding strength reach
countrymU10 standard.
Example 2 gets the sulfate slag 5kg of iron content 39.77%, put into XMQ-φ 240 × 90 ball mill ore grinding (amount of putting into is less than 500g at every turn) in batches, controlling ore grinding concentration of sizing mixing is 40%, ore grinding 4min, adds the ore deposit of milled that to control feed ore concentration in the magnetic separator feed launder of XCSQ-50 × 70 be 25%, is set to ore deposit time 4s, in rush time 10s, essence rushes time 12s, and magnetizing current is 10A, carries out magnetic separation.The concentrate rate of recovery 81.09%, concentrate Iron grade 53.67%, obtains mine tailing 1995.67g.Mine tailing is placed in drying in oven, obtain mine tailing, add 665g cement (cement and mine tailing are than being 1:3), 500g flyash (flyash and mine tailing are than being 1:4), 400g lime (lime and mine tailing are than being 1:5), stir, abundant mixing, add 665mL water (water and mine tailing mass ratio 1:5), add 18g gypsum, the sodium-chlor of 20g 1:1 and sodium sulfate, stirring and evenly mixing, ageing 30min, put it in the Standard Module of 240 × 115 × 53mm, take out from mould after 24 hours, put into maintaining box maintenance more than 7 days, the fragment of brick ultimate compression strength obtained and folding strength reach
countrymU10 standard.
Example 3 example 1: the sulfate slag 5kg getting iron content 39.77%, put into XMQ-φ 240 × 90 ball mill ore grinding (amount of putting into is less than 500g at every turn) in batches, controlling ore grinding concentration of sizing mixing is 30%, ore grinding 4min, the ore deposit of milled being added XCSQ-50 × 70 magnetic separator feed launder control feed ore concentration is 20%, is set to ore deposit time 3s, in rush time 9s, essence rushes time 11s, and magnetizing current is 8A, carries out magnetic separation.The concentrate rate of recovery 79.81%, concentrate Iron grade 54.27%, obtains mine tailing 2075.69g.Mine tailing is placed in drying in oven, obtain mine tailing, add 520g cement (cement and mine tailing are than being 1:4), 415g flyash (flyash and mine tailing are than being 1:5), 346g lime and mine tailing are than being 1:6), stir, abundant mixing, add 520mL water (water and mine tailing mass ratio 1:4), add 15g gypsum, the sodium-chlor of 15g 1:1 and sodium sulfate, stirring and evenly mixing, ageing 30min, put it in the Standard Module of 240 × 115 × 53mm, take out from mould after 24 hours, put into maintaining box maintenance more than 7 days, the fragment of brick ultimate compression strength obtained and folding strength reach
countrymU10 standard.
Claims (7)
1. a method for pyrite cinder magnetic tailing brickmaking, is characterized in that: comprise the following steps:
(1) be initial feed with sulfate slag, be placed in ball mill, control ore grinding and to size mixing concentration, ore grinding;
(2) after ore grinding completes, control pulp density, load wet magnetic separator in the steel basin of ore deposit;
(3) control magnetic separator steel basin feed ore concentration and rush the time to ore deposit, Zhong Chong, essence, carrying out magnetic separation;
(4) chats and mine tailing are all classified as mine tailing, filter through filter, then put into oven for drying;
(5) take mine tailing as raw material, with cement, flyash, lime mixes;
(6) add water, gypsum and admixture, stir, after ageing, put into mould;
(7) place after one day and take out from mould, put into maintaining box maintenance.
2. the method for a kind of pyrite cinder magnetic tailing according to claim 1 brickmaking, is characterized in that: above-mentioned ore grinding concentration of sizing mixing is 20% ~ 40%.
3. the method for a kind of pyrite cinder magnetic tailing according to claim 1 brickmaking, it is characterized in that: it is 15% ~ 25% that above-mentioned magnetic separator stirs feeding trough feed ore concentration, to ore deposit time 2 ~ 4s, middlely rush time 8 ~ 10s and essence rushes time 10 ~ 12s, magnetic separation magnetizing current is 5 ~ 10A.
4. the method for a kind of pyrite cinder magnetic tailing according to claim 1 brickmaking, it is characterized in that: above-mentioned cement is Portland cement, the mass ratio of cement consumption and mine tailing consumption is 1:3 ~ 1:5, the mass ratio of flyash consumption and mine tailing consumption is 1:4 ~ 1:7, lime is calcium lime powder, and lime consumption is the 1:5 ~ 1:7 of mine tailing consumption.
5. the method for a kind of pyrite cinder magnetic tailing according to claim 1 brickmaking, is characterized in that: the mass ratio of above-mentioned amount of water and mine tailing consumption is 1:5 ~ 1:3, and gypsum consumption is that every 1kg mine tailing adds 6 ~ 9g.
6. the method for a kind of pyrite cinder magnetic tailing according to claim 1 brickmaking, is characterized in that: above-mentioned admixture is sodium-chlor and sodium sulfate ratio is the mixture of 1:1, and additive usage is that every 1kg mine tailing adds 5 ~ 10g.
7. the method for a kind of pyrite cinder magnetic tailing according to claim 1 brickmaking, is characterized in that: above-mentioned digestion time is 30min ~ 40min.
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| CN201410644863.2A CN104591662A (en) | 2014-11-14 | 2014-11-14 | Method for preparing brick from pyrite cinder magnetic separation mine tailing |
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| CN201410644863.2A CN104591662A (en) | 2014-11-14 | 2014-11-14 | Method for preparing brick from pyrite cinder magnetic separation mine tailing |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064258A (en) * | 1991-02-12 | 1992-09-09 | 河北省南皮县水泥构件厂 | Slag brick and manufacture method thereof |
| CN1197830A (en) * | 1997-04-25 | 1998-11-04 | 李长水 | Weighting agent for oil well drilling liquid |
| RU2007102997A (en) * | 2007-01-25 | 2008-07-27 | Юли Алексеевна Щепочкина (RU) | RAW MIX |
| CN102218372A (en) * | 2011-03-24 | 2011-10-19 | 亢首锋 | Process for recycling iron concentrates by combined magnetic separation |
| CN103861727A (en) * | 2014-03-26 | 2014-06-18 | 贵州大学 | Method for producing high-iron and low-sulfur iron ore concentrate by performing magnetic separation, desulfuration and iron enrichment on sulfate slag |
-
2014
- 2014-11-14 CN CN201410644863.2A patent/CN104591662A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064258A (en) * | 1991-02-12 | 1992-09-09 | 河北省南皮县水泥构件厂 | Slag brick and manufacture method thereof |
| CN1197830A (en) * | 1997-04-25 | 1998-11-04 | 李长水 | Weighting agent for oil well drilling liquid |
| RU2007102997A (en) * | 2007-01-25 | 2008-07-27 | Юли Алексеевна Щепочкина (RU) | RAW MIX |
| CN102218372A (en) * | 2011-03-24 | 2011-10-19 | 亢首锋 | Process for recycling iron concentrates by combined magnetic separation |
| CN103861727A (en) * | 2014-03-26 | 2014-06-18 | 贵州大学 | Method for producing high-iron and low-sulfur iron ore concentrate by performing magnetic separation, desulfuration and iron enrichment on sulfate slag |
Non-Patent Citations (3)
| Title |
|---|
| 姚树刚等: "三免尾矿砖研制报告", 《硅酸盐建筑制品》 * |
| 庹必阳等: "硫酸渣磁选工艺的研究", 《矿业快报》 * |
| 郎义勇: "《质量员 市政工程》", 30 April 2014 * |
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Application publication date: 20150506 |