CN102659360A - Iron tailing steam curing brick and preparation method thereof - Google Patents
Iron tailing steam curing brick and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of iron tailing treatment, in particular to an iron tailing steam curing brick and a preparation method thereof. The iron tailing steam curing brick is characterized by being prepared from the following raw materials in percentage by weight: 65-85 percent of activated iron tailings, 9-27 percent of river sand and 4-8 percent of ordinary silicate cement, gypsum and water wherein the sum of the weight percent of the iron tailings, the river sand and the ordinary silicate cement is 100 percent; the adding amount of gypsum is 2 percent of the total mass of the activated iron tailings, the river sand and the ordinary silicate cement; and the adding amount of water is 8 percent of the total mass of the activated iron tailings, the river sand , the ordinary silicate cement and gypsum. Due to the adoption of the iron tailing steam curing brick, the problems of high cement using amount and high cost caused by the adoption of iron tailings serving as a major raw material for preparing a building material, and secondary pollution caused by recovery of iron ore concentrate are solved.
Description
Technical field
The present invention relates to the iron ore mine processing technology field, be specifically related to a kind of steamed brick that iron ore mine processes and preparation method thereof that utilizes.
Background technology
Along with the quick growth of steel industry, increasing to the demand of iron ore, the mine tailing that iron ore beneficiation produces is also more and more.Mine tailing has not only taken a large amount of valuable land resourcess, and also there is security threat near the tailing dam cities and towns, also can cause huge pollution to environment even accident in a single day occurs away from the tailing dam of Residential areas.Therefore, the problem that how to turn waste into wealth and become People more and more to pay close attention to the iron ore mine recycling.
Along with China's rapid development of economy, the demand of iron and steel is also soaring day by day, and what bring therefrom is that a large amount of industrial waste of form more and more receives people's attention with iron ore mine etc.These industrial wastes have not only taken a large amount of land resources, have polluted environment, also exist certain potential safety hazard, and urgent need will drop into sizable energy and go to recover and administer.Simultaneously; In order to change China's building material industry midium or long term is the way that these a large amount of waste land resourcess of raw material production vitrified brick, destruction are ploughed with the clay; China forbids producing, using and selling solid clay brick on June 30th, 2003, and advocates research and use industrial waste as building material.So; A lot of scholars take up the research and utilization iron ore mine and prepare various material of construction as filler, are CN 101786859 A (a kind of iron tailing baked brick and preparation method thereof), CN 101182141 A (a kind of method of utilizing iron tailings to prepare high-strength structured material), CN 1887770 A (is the method for raw material production vitrified brick with the iron tailings), CN 101725206 A (a kind of iron ore tailing wall body autoclaved brick and preparation method thereof) and CN 1727301 A patent documentations such as (a kind of prepared from tailing sand of iron ore buring free, steaming free bearing building blocks or brick and ME thereof) like publication number.
But the disclosed preparation method of above-mentioned patent documentation causes cost too high owing to cement, aggregate consumption are big, lacking of market competition ability, and its basic reason is the iron ore mine fine size, belongs to typical nonactive mineral material, does not possess pozzolanic activity.Therefore, use utilizing iron ore mine to prepare can only to be used as inert packing in the process of various material of construction, addition is generally little, is difficult to really reach the purpose of mass consumption iron ore mine.Meanwhile, in resource deficient day by day today, a lot of scholars have also studied iron ore mine have been carried out after certain process handles; Ore dressing is reclaimed and is obtained iron ore concentrate once more; But also brought the secondary mine tailing simultaneously, caused secondary pollution, do not reached the purpose of utilizing iron ore mine fully.
Summary of the invention
The object of the present invention is to provide a kind of iron ore mine steamed brick and preparation method thereof, solving is that main raw material prepares that the material of construction cement consumption is big, cost is high at present with the iron ore mine, and reclaims the secondary pollution problem that iron ore concentrate brings once more.
In order to achieve the above object; Technical scheme of the present invention is achieved in that a kind of iron ore mine steamed brick; It is characterized in that it is prepared from activatory iron ore mine, river sand, ordinary Portland cement, gypsum and water; Each feed composition percentage ratio by weight is: activatory iron ore mine 65～85%, river sand 9～27%, ordinary Portland cement 4～8%, and the shared weight percentage sum of activatory iron ore mine, river sand and ordinary Portland cement is 100%; The add-on of gypsum is 2% of activatory iron ore mine, river sand and an ordinary Portland cement quality summation; The water add-on is 8% of activatory iron ore mine, river sand, ordinary Portland cement and a gypsum quality summation.
Being prepared as of described activatory iron ore mine: 1. activation treatment: iron ore mine is carried out press filtration, drying, calcining, dry method quenching, obtain through the iron ore mine after the activation treatment; 2. magnetic separation: pass through dry-type magnetic extractor with above-mentioned through the iron ore mine after the activation treatment, isolate iron ore concentrate wherein, surplus materials both had been the activatory iron ore mine.
Used river sand size distribution is 0.6～4.75mm.
The preparation method of above-mentioned a kind of iron ore mine steamed brick is characterized in that it may further comprise the steps:
1) preparation of activatory iron ore mine:
1. activation treatment: iron ore mine is carried out press filtration, drying, calcining, dry method quenching, obtain through the iron ore mine after the activation treatment;
2. magnetic separation: pass through dry-type magnetic extractor with above-mentioned through the iron ore mine after the activation treatment, isolate iron ore concentrate wherein, surplus materials both had been the activatory iron ore mine;
2) batching and mix: by each feed composition by weight percentage ratio be: activatory iron ore mine 65～85%, river sand 9～27%, ordinary Portland cement 4～8%; The shared weight percentage sum of activatory iron ore mine, river sand and ordinary Portland cement is 100%, chooses activatory iron ore mine, river sand and ordinary Portland cement; Add-on by gypsum is 2% of activatory iron ore mine, river sand and an ordinary Portland cement quality summation, chooses gypsum; By the water add-on is 8% of activatory iron ore mine, river sand, ordinary Portland cement and gypsum quality summation, chooses water;
Activatory iron ore mine, river sand, ordinary Portland cement and gypsum done earlier mixed 10 minutes, after add entry and mix and stirred the slip that obtains mixing 10 minutes;
3) moulding: the slip that mixes adopts compression moulding, and forming pressure 20～30MPa obtains adobe;
4) maintenance: the adobe that moulding is obtained is that 25～30 ℃, relative humidity were not less than under the condition of 90% (being generally 90%～95%) maintenance one day in temperature earlier; Under 90 ℃ of temperature steam-cured one day then; Wet curing five days at room temperature promptly obtains iron ore mine steamed brick (finished product) again.
Press filtration in the said activation treatment is to remove the water in the iron ore mine with pressure filter, and iron ore mine is handled through press filtration and obtained the tailing cake that water ratio is 17～18wt%;
Drying in the said activation treatment is the water ratio that further reduces tailing cake, is convenient to next step calcining, and drying can be passed through methods such as heating, infrared radiation and realize that dried tailing cake water ratio is lower than 5wt%, and product is dry mine tailing;
Calcining in the said activation treatment is to mix the coal dust that accounts for dry mine tailing total mass 2～6%, under 600～700 ℃ of temperature, calcines; Temperature rise rate is 15～20 ℃/min; The purpose of adding coal dust is to keep weakly reducing atmosphere, calcination time 1 hour, the mine tailing after obtaining calcining;
Dry method quenching in the said activation treatment is with the cooling rapidly in fluidizing air of the mine tailing after the calcining, and realizes gas solid separation; Cooled iron ore mine carries out ore dressing again with dry magnetic separation, selects the magnetite that forms in the calcining and activating process as iron ore concentrate, and the resistates after the ore dressing both had been the activatory iron ore mine.
The invention has the beneficial effects as follows: earlier iron ore mine is carried out activation treatment, make spathic iron ore contained in the iron ore mine and rhombohedral iron ore be converted into magnetite, can reclaim through magnetic separation like this, again as iron and steel raw material with magnetic.Meanwhile; Through high-temperature calcination the pozzolanic activity of silicoide contained in the iron ore mine and aluminium matter mineral is improved significantly; Therefore can reduce the consumption of cement when making the iron ore mine steamed brick or under the situation of adding equal cement amount, put forward iron ore mine steamed brick intensity; And thoroughly solved in the prior art because of the activation treatment iron ore mine reclaims the secondary pollution problem that iron ore concentrate brings, reach the purpose of efficient, economy, recycling iron ore mine.Cement consumption of the present invention little (ordinary Portland cement 4～8%), cost are low.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to following embodiment.
Embodiment 1:
A kind of iron ore mine steamed brick and preparation method thereof, it may further comprise the steps:
Iron ore mine with meishan iron mine is a feedstock production iron ore mine steamed brick,
1) preparation of activatory iron ore mine: at first be that its (iron ore mine of meishan iron mine) carried out activation treatment and select the magnetite that forms in the reactivation process with dry magnetic separation.1. the concrete technology of activation treatment is following:
Press filtration and drying: with filtering equipment (using plate and frame(type)filter press here) the iron ore mine ore pulp is dewatered, iron ore mine is handled through press filtration and is obtained the tailing cake that water ratio is 17wt%; Tailing cake is put into baking oven with 110 ℃ of dryings 8 hours, and dry mine tailing water ratio 3wt% obtains dry mine tailing.
Calcining and dry method quenching (cooling): dry mine tailing is mixed the coal (coal dust) of its quality 2%, mix, calcined 1 hour down at 700 ℃, temperature rise rate is 15 ℃/min, the mine tailing after obtaining calcining; Take out the back and rapidly it is cooled off, and realize gas solid separation with the mode of gathering dust with fluidizing air.
2. magnetic separation: will pass through calcining refrigerative iron ore mine and carry out dry magnetic separation, and isolate iron ore concentrate wherein, remaining material is the activatory iron ore mine (or claiming the activation iron ore mine) for being used to prepare the iron ore mine air-entrained concrete building block both.
It is generally acknowledged, as material its SiO in basic soln of cement products filler
2And Al
2O
3Solubility rate is high more, and the pozzolanic activity of this material is just high more.Measured the SiO that does not calcine iron ore mine, the postactivated iron ore mine of calcining respectively with light-intensity method in this example
2And Al
2O
3Solubility rate.For not calcining iron ore mine SiO
2Solubility rate is 5.4%, Al
2O
3Solubility rate is 4.6%, and calcines the SiO of postactivated iron ore mine
2And Al
2O
3Solubility rate has improved 17.2% and 4.6% respectively, explains to calcine and has played the effect that improves the iron ore mine pozzolanic activity really.
2) batching and mix: by each feed composition by weight percentage ratio be: activatory iron ore mine 65%, river sand 27% (size distribution is 0.6～4.75 mm), ordinary Portland cement 8%, choose activatory iron ore mine, river sand and ordinary Portland cement; Add-on by gypsum is 2% of activatory iron ore mine, river sand and an ordinary Portland cement quality summation, chooses gypsum; By the water add-on is 8% of activatory iron ore mine, river sand, ordinary Portland cement and gypsum quality summation, chooses water;
Activatory iron ore mine, river sand, ordinary Portland cement and gypsum done earlier mixed 10 minutes, after add entry and mix and stirred the slip that obtains mixing 10 minutes;
3) moulding: the slip that mixes adopts compression moulding, and forming pressure 25MPa obtains adobe;
4) maintenance: the adobe that moulding is obtained is that 25 ℃, relative humidity are maintenance one day under 90% the condition in temperature earlier, and under 90 ℃ of temperature steam-cured one day then, wet curing five days at room temperature promptly obtained iron ore mine steamed brick (finished product) again.
Prepared iron ore mine steamed brick is carried out strength test according to JC/T 422-2007 " non-sintering rubbish tailing-bricks " standard, and the MV of its ultimate compression strength is 23.4MPa, has surpassed the requirement of strength of MU-20.In order to contrast, use do not calcine iron ore mine as raw material with same proportioning and prepared steamed brick, recording its ultimate compression strength MV is 16.1MPa, has only reached the requirement of strength of MU-15.Show thus, adopt the iron ore mine steamed brick that under same proportioning and equal processing condition, makes through incinerating activatory iron ore mine, will improve much than the ultimate compression strength of the steamed brick that makes with incinerating iron ore mine not.Ordinary Portland cement 8% explains that cement consumption of the present invention is little, cost is low.
Embodiment 2:
A kind of iron ore mine steamed brick and preparation method thereof, it may further comprise the steps:
Iron ore mine with meishan iron mine is a feedstock production iron ore mine steamed brick,
1) preparation of activatory iron ore mine: at first be that its (iron ore mine of meishan iron mine) carried out activation treatment and select the magnetite that forms in the reactivation process with dry magnetic separation.1. the concrete technology of activation treatment is following:
Press filtration and drying: can carry out with reference to the step among the embodiment 1.
Calcining and dry method quenching (cooling): dry mine tailing is mixed the coal (coal dust) of its quality 4%, mix, calcined 1 hour down at 700 ℃, temperature rise rate is 20 ℃/min, the mine tailing after obtaining calcining; Take out the back and rapidly it is cooled off, and realize gas solid separation with the mode of gathering dust with fluidizing air.
2. magnetic separation: will pass through calcining refrigerative iron ore mine and carry out dry magnetic separation, and isolate iron ore concentrate wherein, remaining material is the activatory iron ore mine (or claiming the activation iron ore mine) for being used to prepare the iron ore mine air-entrained concrete building block both.
The SiO of the activatory iron ore mine after having measured respectively with light-intensity method in this example and do not calcined iron ore mine, having calcined
2And Al
2O
3Solubility rate.For not calcining iron ore mine SiO
2Solubility rate is 5.4%, Al
2O
3Solubility rate is 4.6%, and the SiO of the activatory iron ore mine after the calcining
2And Al
2O
3Solubility rate has improved 23.8% and 5.7% respectively.
2) batching and mix: by each feed composition by weight percentage ratio be: activatory iron ore mine 75%, river sand 19% (size distribution is 0.6～4.75 mm), ordinary Portland cement 6%, choose activatory iron ore mine, river sand and ordinary Portland cement; Add-on by gypsum is 2% of activatory iron ore mine, river sand and an ordinary Portland cement quality summation, chooses gypsum; By the water add-on is 8% of activatory iron ore mine, river sand, ordinary Portland cement and gypsum quality summation, chooses water;
Activatory iron ore mine, river sand, ordinary Portland cement and gypsum done earlier mixed 10 minutes, after add entry and mix and stirred the slip that obtains mixing 10 minutes;
3) moulding: the slip that mixes adopts compression moulding, and forming pressure 20MPa obtains adobe;
4) maintenance: the adobe that moulding is obtained is that 30 ℃, relative humidity are maintenance one day under 95% the condition in temperature earlier, and under 90 ℃ of temperature steam-cured one day then, wet curing five days at room temperature promptly obtained iron ore mine steamed brick (finished product) again.
Prepared iron ore mine steamed brick is carried out strength test according to JC/T 422-2007 " non-sintering rubbish tailing-bricks " standard, and the MV of its ultimate compression strength is 21.5MPa, has surpassed the requirement of strength of MU-20.In order to contrast, use do not calcine iron ore mine as raw material with same proportioning and prepared steamed brick, recording its ultimate compression strength MV is 13.1MPa, is lower than the requirement of strength of MU-15.Ordinary Portland cement 6% explains that cement consumption of the present invention is little, cost is low.
Embodiment 3:
A kind of iron ore mine steamed brick and preparation method thereof, it may further comprise the steps:
Iron ore mine with meishan iron mine is a feedstock production iron ore mine steamed brick,
1) preparation of activatory iron ore mine: at first be that its (iron ore mine of meishan iron mine) carried out activation treatment and select the magnetite that forms in the reactivation process with dry magnetic separation.1. the concrete technology of activation treatment is following:
Press filtration and drying: can carry out with reference to the step among the embodiment 1.
Calcining and dry method quenching (cooling): dry mine tailing is mixed the coal (coal dust) of its quality 6%, mix, calcined 1 hour down at 700 ℃, temperature rise rate is 18 ℃/min, the mine tailing after obtaining calcining; Take out the back and rapidly it is cooled off, and realize gas solid separation with the mode of gathering dust with fluidizing air.
2. magnetic separation: will pass through calcining refrigerative iron ore mine and carry out dry magnetic separation, and isolate iron ore concentrate wherein, remaining material is the activatory iron ore mine (or claiming the activation iron ore mine) for being used to prepare the iron ore mine air-entrained concrete building block both.
The SiO of the activatory iron ore mine after having measured respectively with light-intensity method in this example and do not calcined iron ore mine, having calcined
2And Al
2O
3Solubility rate.For not calcining iron ore mine SiO
2Solubility rate is 5.4%, Al
2O
3Solubility rate is 4.6%, and the SiO of the activatory iron ore mine after the calcining
2And Al
2O
3Solubility rate has improved 33.1% and 10.1% respectively.
2) batching and mix: by each feed composition by weight percentage ratio be: activatory iron ore mine 85%, river sand 11% (size distribution is 0.6～4.75 mm), ordinary Portland cement 4%, choose activatory iron ore mine, river sand and ordinary Portland cement; Add-on by gypsum is 2% of activatory iron ore mine, river sand and an ordinary Portland cement quality summation, chooses gypsum; By the water add-on is 8% of activatory iron ore mine, river sand, ordinary Portland cement and gypsum quality summation, chooses water;
Activatory iron ore mine, river sand, ordinary Portland cement and gypsum done earlier mixed 10 minutes, after add entry and mix and stirred the slip that obtains mixing 10 minutes;
3) moulding: the slip that mixes adopts compression moulding, and forming pressure 30MPa obtains adobe;
4) maintenance: the adobe that moulding is obtained is that 25 ℃, relative humidity are maintenance one day under 92% the condition in temperature earlier, and under 90 ℃ of temperature steam-cured one day then, wet curing five days at room temperature promptly obtained iron ore mine steamed brick (finished product) again.
Prepared iron ore mine steamed brick is carried out strength test according to JC/T 422-2007 " non-sintering rubbish tailing-bricks " standard, and the MV of its ultimate compression strength is 22.6MPa, has surpassed the requirement of strength of MU-20.In order to contrast, use do not calcine iron ore mine as raw material with same proportioning and prepared steamed brick, recording its ultimate compression strength MV is 10.5MPa, is lower than the requirement of strength of MU-15.
Embodiment 4:
A kind of iron ore mine steamed brick and preparation method thereof, it may further comprise the steps:
Iron ore mine with meishan iron mine is a feedstock production iron ore mine steamed brick,
1) preparation of activatory iron ore mine: at first be that its (iron ore mine of meishan iron mine) carried out activation treatment and select the magnetite that forms in the reactivation process with dry magnetic separation.1. the concrete technology of activation treatment is following:
Press filtration and drying: can carry out with reference to the step among the embodiment 1.
Calcining and dry method quenching (cooling): dry mine tailing is mixed the coal (coal dust) of its quality 2%, mix, calcined 1 hour down at 600 ℃, temperature rise rate is 20 ℃/min, the mine tailing after obtaining calcining; Take out the back and rapidly it is cooled off, and realize gas solid separation with the mode of gathering dust with fluidizing air.
2. magnetic separation: will pass through calcining refrigerative iron ore mine and carry out dry magnetic separation, and isolate iron ore concentrate wherein, remaining material is the activatory iron ore mine (or claiming the activation iron ore mine) for being used to prepare the iron ore mine air-entrained concrete building block both.
The SiO of the activatory iron ore mine after having measured respectively with light-intensity method in this example and do not calcined iron ore mine, having calcined
2And Al
2O
3Solubility rate.For not calcining iron ore mine SiO
2Solubility rate is 5.4%, Al
2O
3Solubility rate is 4.6%, and the SiO of the activatory iron ore mine after the calcining
2And Al
2O
3Solubility rate has improved 3.5% and 2.4% respectively.
2) batching and mix: by each feed composition by weight percentage ratio be: activatory iron ore mine 65%, river sand 27% (size distribution is 0.6～4.75 mm), ordinary Portland cement 8%, choose activatory iron ore mine, river sand and ordinary Portland cement; Add-on by gypsum is 2% of activatory iron ore mine, river sand and an ordinary Portland cement quality summation, chooses gypsum; By the water add-on is 8% of activatory iron ore mine, river sand, ordinary Portland cement and gypsum quality summation, chooses water;
Activatory iron ore mine, river sand, ordinary Portland cement and gypsum done earlier mixed 10 minutes, after add entry and mix and stirred the slip that obtains mixing 10 minutes;
3) moulding: the slip that mixes adopts compression moulding, and forming pressure 25MPa obtains adobe;
4) maintenance: the adobe that moulding is obtained is that 30 ℃, relative humidity are maintenance one day under 90% the condition in temperature earlier, and under 90 ℃ of temperature steam-cured one day then, wet curing five days at room temperature promptly obtained iron ore mine steamed brick (finished product) again.
Prepared iron ore mine steamed brick is carried out strength test according to JC/T 422-2007 " non-sintering rubbish tailing-bricks " standard, and the MV of its ultimate compression strength is 21.8MPa, has surpassed the requirement of strength of MU-20.In order to contrast, use do not calcine iron ore mine as raw material with same proportioning and prepared steamed brick, recording its ultimate compression strength MV is 16.1MPa, has only reached the requirement of strength of MU-15.
Embodiment 5:
A kind of iron ore mine steamed brick and preparation method thereof, it may further comprise the steps:
Iron ore mine with meishan iron mine is a feedstock production iron ore mine steamed brick,
1) preparation of activatory iron ore mine: at first be that its (iron ore mine of meishan iron mine) carried out activation treatment and select the magnetite that forms in the reactivation process with dry magnetic separation.1. the concrete technology of activation treatment is following:
Press filtration and drying: can carry out with reference to the step among the embodiment 1.
Calcining and dry method quenching (cooling): dry mine tailing is mixed the coal (coal dust) of its quality 4%, mix, calcined 1 hour down at 600 ℃, temperature rise rate is 15 ℃/min, the mine tailing after obtaining calcining; Take out the back and rapidly it is cooled off, and realize gas solid separation with the mode of gathering dust with fluidizing air.
2. magnetic separation: will pass through calcining refrigerative iron ore mine and carry out dry magnetic separation, and isolate iron ore concentrate wherein, remaining material is the activatory iron ore mine (or claiming the activation iron ore mine) for being used to prepare the iron ore mine air-entrained concrete building block both.
The SiO of the activatory iron ore mine after having measured respectively with light-intensity method in this example and do not calcined iron ore mine, having calcined
2And Al
2O
3Solubility rate.For not calcining iron ore mine SiO
2Solubility rate is 5.4%, Al
2O
3Solubility rate is 4.6%, and the SiO of the activatory iron ore mine after the calcining
2And Al
2O
3Solubility rate has improved 6.1% and 7.6% respectively.
2) batching and mix: by each feed composition by weight percentage ratio be: activatory iron ore mine 75%, river sand 21% (size distribution is 0.6～4.75 mm), ordinary Portland cement 4%, choose activatory iron ore mine, river sand and ordinary Portland cement; Add-on by gypsum is 2% of activatory iron ore mine, river sand and an ordinary Portland cement quality summation, chooses gypsum; By the water add-on is 8% of activatory iron ore mine, river sand, ordinary Portland cement and gypsum quality summation, chooses water;
Activatory iron ore mine, river sand, ordinary Portland cement and gypsum done earlier mixed 10 minutes, after add entry and mix and stirred the slip that obtains mixing 10 minutes;
3) moulding: the slip that mixes adopts compression moulding, and forming pressure 30MPa obtains adobe;
4) maintenance: the adobe that moulding is obtained is that 30 ℃, relative humidity are maintenance one day under 95% the condition in temperature earlier, and under 90 ℃ of temperature steam-cured one day then, wet curing five days at room temperature promptly obtained iron ore mine steamed brick (finished product) again.
Prepared iron ore mine steamed brick is carried out strength test according to JC/T 422-2007 " non-sintering rubbish tailing-bricks " standard, and the MV of its ultimate compression strength is 16.4MPa, has reached the requirement of strength of MU-15.In order to contrast, use do not calcine iron ore mine as raw material with same proportioning and prepared steamed brick, recording its ultimate compression strength MV is 9.9MPa, is lower than the requirement of strength of MU-15.
Embodiment 6:
A kind of iron ore mine steamed brick and preparation method thereof, it may further comprise the steps:
Iron ore mine with meishan iron mine is a feedstock production iron ore mine steamed brick,
1) preparation of activatory iron ore mine: at first be that its (iron ore mine of meishan iron mine) carried out activation treatment and select the magnetite that forms in the reactivation process with dry magnetic separation.1. the concrete technology of activation treatment is following:
Press filtration and drying: can carry out with reference to the step among the embodiment 1.
Calcining and dry method quenching (cooling): dry mine tailing is mixed the coal (coal dust) of its quality 6%, mix, calcined 1 hour down at 600 ℃, temperature rise rate is 15 ℃/min, the mine tailing after obtaining calcining; Take out the back and rapidly it is cooled off, and realize gas solid separation with the mode of gathering dust with fluidizing air.
2. magnetic separation: will pass through calcining refrigerative iron ore mine and carry out dry magnetic separation, and isolate iron ore concentrate wherein, remaining material is the activatory iron ore mine (or claiming the activation iron ore mine) for being used to prepare the iron ore mine air-entrained concrete building block both.
The SiO of the activatory iron ore mine after having measured respectively with light-intensity method in this example and do not calcined iron ore mine, having calcined
2And Al
2O
3Solubility rate.For not calcining iron ore mine SiO
2Solubility rate is 5.4%, Al
2O
3Solubility rate is 4.6%, and the SiO of the activatory iron ore mine after the calcining
2And Al
2O
3Solubility rate has improved 8.4% and 8.8% respectively.
2) batching and mix: by each feed composition by weight percentage ratio be: activatory iron ore mine 85%, river sand 9% (size distribution is 0.6～4.75 mm), ordinary Portland cement 6%, choose activatory iron ore mine, river sand and ordinary Portland cement; Add-on by gypsum is 2% of activatory iron ore mine, river sand and an ordinary Portland cement quality summation, chooses gypsum; By the water add-on is 8% of activatory iron ore mine, river sand, ordinary Portland cement and gypsum quality summation, chooses water;
Activatory iron ore mine, river sand, ordinary Portland cement and gypsum done earlier mixed 10 minutes, after add entry and mix and stirred the slip that obtains mixing 10 minutes;
3) moulding: the slip that mixes adopts compression moulding, and forming pressure 30MPa obtains adobe;
4) maintenance: the adobe that moulding is obtained is that 25 ℃, relative humidity are maintenance one day under 92% the condition in temperature earlier, and under 90 ℃ of temperature steam-cured one day then, wet curing five days at room temperature promptly obtained iron ore mine steamed brick (finished product) again.
Prepared iron ore mine steamed brick is carried out strength test according to JC/T 422-2007 " non-sintering rubbish tailing-bricks " standard, and the MV of its ultimate compression strength is 19.6MPa, has obviously surpassed the requirement of strength of MU-15.In order to contrast, use do not calcine iron ore mine as raw material with same proportioning and prepared steamed brick, recording its ultimate compression strength MV is 12.6MPa, is lower than the requirement of strength of MU-15.
Embodiment 7:
A kind of iron ore mine steamed brick and preparation method thereof, it may further comprise the steps:
Iron ore mine with meishan iron mine is a feedstock production iron ore mine steamed brick,
1) preparation of activatory iron ore mine: at first be that its (iron ore mine of meishan iron mine) carried out activation treatment and select the magnetite that forms in the reactivation process with dry magnetic separation.1. the concrete technology of activation treatment is following:
Press filtration and drying: can carry out with reference to the step among the embodiment 1.
Calcining and dry method quenching (cooling): dry mine tailing is mixed the coal (coal dust) of its quality 4%, mix, calcined 1 hour down at 700 ℃, temperature rise rate is 18 ℃/min, the mine tailing after obtaining calcining; Take out the back and rapidly it is cooled off, and realize gas solid separation with the mode of gathering dust with fluidizing air.
2. magnetic separation: will pass through calcining refrigerative iron ore mine and carry out dry magnetic separation, and isolate iron ore concentrate wherein, remaining material is both for being used to prepare the activatory iron ore mine of iron ore mine air-entrained concrete building block.
Measured the SiO that does not calcine iron ore mine, activatory iron ore mine (promptly calcining postactivated iron ore mine) respectively with light-intensity method in this example
2And Al
2O
3Solubility rate.For not calcining iron ore mine SiO
2Solubility rate is 5.4%, Al
2O
3Solubility rate is 4.6%, and calcines the SiO of postactivated iron ore mine
2And Al
2O
3Solubility rate has improved 23.8% and 5.7% respectively.
2) batching and mix: by each feed composition by weight percentage ratio be: activatory iron ore mine 70%, river sand 24% (size distribution is 0.6～4.75 mm), ordinary Portland cement 6%, choose activatory iron ore mine, river sand and ordinary Portland cement; Add-on by gypsum is 2% of activatory iron ore mine, river sand and an ordinary Portland cement quality summation, chooses gypsum; By the water add-on is 8% of activatory iron ore mine, river sand, ordinary Portland cement and gypsum quality summation, chooses water;
Activatory iron ore mine, river sand, ordinary Portland cement and gypsum done earlier mixed 10 minutes, after add entry and mix and stirred the slip that obtains mixing 10 minutes;
3) moulding: the slip that mixes adopts compression moulding, and forming pressure 25MPa obtains adobe;
4) maintenance: the adobe that moulding is obtained is that 30 ℃, relative humidity are maintenance one day under 91% the condition in temperature earlier, and under 90 ℃ of temperature steam-cured one day then, wet curing five days at room temperature promptly obtained iron ore mine steamed brick (finished product) again.
Prepared iron ore mine steamed brick is carried out strength test according to JC/T 422-2007 " non-sintering rubbish tailing-bricks " standard, and the MV of its ultimate compression strength is 22.9MPa, has surpassed the requirement of strength of MU-20.In order to contrast, use do not calcine iron ore mine as raw material with same proportioning and prepared steamed brick, recording its ultimate compression strength MV is 13.9MPa, is lower than the requirement of strength of MU-15.
Embodiment 8:
A kind of iron ore mine steamed brick and preparation method thereof, it may further comprise the steps:
Iron ore mine with meishan iron mine is a feedstock production iron ore mine steamed brick,
1) preparation of activatory iron ore mine: at first be that its (iron ore mine of meishan iron mine) carried out activation treatment and select the magnetite that forms in the reactivation process with dry magnetic separation.1. the concrete technology of activation treatment is following:
Press filtration and drying: remove the water in the iron ore mine with pressure filter, iron ore mine is handled through press filtration and is obtained the tailing cake that water ratio is 18wt%; Carry out drying with infrared-far-infrared dryer, dried tailing cake water ratio is 4.5wt%, and product is dry mine tailing.
Calcining and dry method quenching (cooling): dry mine tailing is mixed the coal (coal dust) of its quality 6%, mix, calcined 1 hour down at 600 ℃, temperature rise rate is 15 ℃/min, the mine tailing after obtaining calcining; Take out the back and rapidly it is cooled off, and realize gas solid separation with the mode of gathering dust with fluidizing air.
2. magnetic separation: will pass through calcining refrigerative iron ore mine and carry out dry magnetic separation, and isolate iron ore concentrate wherein, remaining material is both for being used to prepare the activatory iron ore mine of iron ore mine air-entrained concrete building block.
The SiO of the activatory iron ore mine after having measured respectively with light-intensity method in this example and do not calcined iron ore mine, having calcined
2And Al
2O
3Solubility rate.For not calcining iron ore mine SiO
2Solubility rate is 5.4%, Al
2O
3Solubility rate is 4.6%, and the SiO of the activatory iron ore mine after the calcining
2And Al
2O
3Solubility rate has improved 8.4% and 8.8% respectively.
2) batching and mix: by each feed composition by weight percentage ratio be: activatory iron ore mine 70%, river sand 22% (size distribution is 0.6～4.75 mm), ordinary Portland cement 8%, choose activatory iron ore mine, river sand and ordinary Portland cement; Add-on by gypsum is 2% of activatory iron ore mine, river sand and an ordinary Portland cement quality summation, chooses gypsum; By the water add-on is 8% of activatory iron ore mine, river sand, ordinary Portland cement and gypsum quality summation, chooses water;
Activatory iron ore mine, river sand, ordinary Portland cement and gypsum done earlier mixed 10 minutes, after add entry and mix and stirred the slip that obtains mixing 10 minutes;
3) moulding: the slip that mixes adopts compression moulding, and forming pressure 25MPa obtains adobe;
4) maintenance: the adobe that moulding is obtained is that 25 ℃, relative humidity are maintenance one day under 90% the condition in temperature earlier, and under 90 ℃ of temperature steam-cured one day then, wet curing five days at room temperature promptly obtained iron ore mine steamed brick (finished product) again.
Prepared iron ore mine steamed brick is carried out strength test according to JC/T 422-2007 " non-sintering rubbish tailing-bricks " standard, and the MV of its ultimate compression strength is 22.1MPa, has surpassed the requirement of strength of MU-20.In order to contrast, use do not calcine iron ore mine as raw material with same proportioning and prepared steamed brick, recording its ultimate compression strength MV is 15.8MPa, has only reached the requirement of strength of MU-15.
The bound value and the interval value of each processing parameter (like temperature, pressure, time) that the present invention is cited can both realize the present invention, do not enumerate embodiment one by one at this.
Claims (5)
1. iron ore mine steamed brick; It is characterized in that it is prepared from activatory iron ore mine, river sand, ordinary Portland cement, gypsum and water; Each feed composition percentage ratio by weight is: activatory iron ore mine 65～85%, river sand 9～27%, ordinary Portland cement 4～8%, and the shared weight percentage sum of activatory iron ore mine, river sand and ordinary Portland cement is 100%; The add-on of gypsum is 2% of activatory iron ore mine, river sand and an ordinary Portland cement quality summation; The water add-on is 8% of activatory iron ore mine, river sand, ordinary Portland cement and a gypsum quality summation.
2. a kind of iron ore mine steamed brick according to claim 1; It is characterized in that: being prepared as of described activatory iron ore mine: 1. activation treatment: iron ore mine is carried out press filtration, drying, calcining, dry method quenching, obtain through the iron ore mine after the activation treatment; 2. magnetic separation: pass through dry-type magnetic extractor with above-mentioned through the iron ore mine after the activation treatment, isolate iron ore concentrate wherein, surplus materials both had been the activatory iron ore mine.
3. a kind of iron ore mine steamed brick according to claim 1 is characterized in that: used river sand size distribution is 0.6～4.75mm.
4. method for preparing iron ore mine steamed brick as claimed in claim 1 is characterized in that it may further comprise the steps:
1) preparation of activatory iron ore mine:
1. activation treatment: iron ore mine is carried out press filtration, drying, calcining, dry method quenching, obtain through the iron ore mine after the activation treatment;
2. magnetic separation: pass through dry-type magnetic extractor with above-mentioned through the iron ore mine after the activation treatment, isolate iron ore concentrate wherein, surplus materials both had been the activatory iron ore mine;
2) batching and mix: by each feed composition by weight percentage ratio be: activatory iron ore mine 65～85%, river sand 9～27%, ordinary Portland cement 4～8%; The shared weight percentage sum of activatory iron ore mine, river sand and ordinary Portland cement is 100%, chooses activatory iron ore mine, river sand and ordinary Portland cement; Add-on by gypsum is 2% of activatory iron ore mine, river sand and an ordinary Portland cement quality summation, chooses gypsum; By the water add-on is 8% of activatory iron ore mine, river sand, ordinary Portland cement and gypsum quality summation, chooses water;
Activatory iron ore mine, river sand, ordinary Portland cement and gypsum done earlier mixed 10 minutes, after add entry and mix and stirred the slip that obtains mixing 10 minutes;
3) moulding: the slip that mixes adopts compression moulding, and forming pressure 20～30MPa obtains adobe;
4) maintenance: the adobe that moulding is obtained is that 25～30 ℃, relative humidity were not less than under the condition of 90% (being generally 90%～95%) maintenance one day in temperature earlier; Under 90 ℃ of temperature steam-cured one day then; Wet curing five days at room temperature promptly obtains the iron ore mine steamed brick again.
5. the preparation method of a kind of iron ore mine steamed brick according to claim 4; It is characterized in that: the press filtration in the said activation treatment; Be to remove the water in the iron ore mine with pressure filter, iron ore mine is handled through press filtration and is obtained the tailing cake that water ratio is 17～18wt%;
Drying in the said activation treatment, it is dry that dried tailing cake water ratio is lower than 5wt% through heating, the realization of infrared radiation method, and product is dry mine tailing;
Calcining in the said activation treatment is to mix the coal dust that accounts for dry mine tailing total mass 2～6%, under 600～700 ℃ of temperature, calcines, and temperature rise rate is 15～20 ℃/min, calcination time 1 hour, the mine tailing after obtaining calcining;
Dry method quenching in the said activation treatment is with the cooling rapidly in fluidizing air of the mine tailing after the calcining, and realizes gas solid separation.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496933A (en) * | 2013-09-25 | 2014-01-08 | 盐城工学院 | Preparation method of high-ferrosilicon tailing autoclaved brick |
| RU2550754C1 (en) * | 2014-06-16 | 2015-05-10 | Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" | Dry construction mixture |
| CN108530015A (en) * | 2018-05-14 | 2018-09-14 | 河南理工大学 | A kind of steamed brick and preparation method thereof using bauxite gangue manufacture |
| CN110342845A (en) * | 2019-06-19 | 2019-10-18 | 张晓夫 | Utilize the method for iron tailings slag production sand |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1148035A (en) * | 1996-08-19 | 1997-04-23 | 张伟晒 | Method for recovering tailings of iron ore |
| CN101713234A (en) * | 2009-10-30 | 2010-05-26 | 武汉理工大学 | Non-autoclaved and unburned brick and preparation method thereof |
-
2012
- 2012-04-24 CN CN201210121545.9A patent/CN102659360B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1148035A (en) * | 1996-08-19 | 1997-04-23 | 张伟晒 | Method for recovering tailings of iron ore |
| CN101713234A (en) * | 2009-10-30 | 2010-05-26 | 武汉理工大学 | Non-autoclaved and unburned brick and preparation method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496933A (en) * | 2013-09-25 | 2014-01-08 | 盐城工学院 | Preparation method of high-ferrosilicon tailing autoclaved brick |
| CN103496933B (en) * | 2013-09-25 | 2015-03-11 | 盐城工学院 | Preparation method of high-ferrosilicon tailing autoclaved brick |
| RU2550754C1 (en) * | 2014-06-16 | 2015-05-10 | Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" | Dry construction mixture |
| CN108530015A (en) * | 2018-05-14 | 2018-09-14 | 河南理工大学 | A kind of steamed brick and preparation method thereof using bauxite gangue manufacture |
| CN108530015B (en) * | 2018-05-14 | 2021-03-19 | 河南理工大学 | Steam-cured brick manufactured by bauxite tailings and preparation method thereof |
| CN110342845A (en) * | 2019-06-19 | 2019-10-18 | 张晓夫 | Utilize the method for iron tailings slag production sand |
| CN110342845B (en) * | 2019-06-19 | 2022-02-18 | 张晓夫 | Method for manufacturing sand by using iron tailing slag |
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| CN102659360B (en) | 2014-04-30 |
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