CN104446068B - The method producing belite-gypsum material with boiling roaster mud, waste gypsum - Google Patents
The method producing belite-gypsum material with boiling roaster mud, waste gypsum Download PDFInfo
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Abstract
The method producing belite gypsum material with boiling roaster mud, waste gypsum, comprises the following steps: high-moisture-contensludge sludge ridge grain crystal seed is turned to modified sewage sludge slag by (1)；(2) by step (1) gained modified sewage sludge slag and waste gypsum, barren rock slag and correction material, raw meal proportioning and homogeneous are carried out；(3) by step (2) gained raw material compound, utilize the waste gas hot blast of fluidized bed furnace, carry out drying sulphur solid with flue gas desulfurization；(4) the raw material compound after being dried by step (3) gained and appropriate coal-fired mixing, be roasted to grog in adding fluidized bed furnace；(5) by step (4) gained grog grinding, powder is made, or by step (4) gained grog,.Present invention process is simple, controls to require low, grinding energy and to burn till energy consumption low, and large waste residue such as mud, industrial waste gypsum of can dissolving with having a large capacity and a wide range, prepared belite gypsum material is of many uses.
Description
Technical field
The present invention relates to a kind of method producing belite-gypsum material, especially relate to a kind of boiling roaster mud, the method for waste gypsum production belite-gypsum material.
Background technology
Currently, built 3000 Duo Zuo sewage treatment plants of China, the primary mud (moisture content about 99%) that Mei Jian sewage treatment plant produces every day is more than 30,000,000 tons, so China's quantity of wastewater effluent is the most more than 5 × 1010m3/d.Primary mud moisture content after further conventional mechanicals processed only can be down to about 80%.If all sewage disposals, by each ten thousand stere sewage containing the wet mud estimation that 5 tons of moisture content are 80%, sludge quantity can be produced day more than 2,500,000 tons, sludge quantity can be produced year more than 900,000,000 tons.But, reason due to economic and technical, Treatment of Sludge there is no stable and rational outlet, total situation is still with before filling, stack, toppling over as argument, the main method of disposal of mud has ocean and culvert underdrain to topple over, sanitary landfills, sludge composting, mud dry burning etc., but, topple over, fill, compost, traditional Treatment of Sludge mode deficiency based on himself and the defect such as burning, promote sewage plant sludge to be treated as solving the focus of Urban Environmental Problem.Therefore, the resource realizing mud in sludge handling process becomes the important topic that exploration sludge pollution is thoroughly effected a radical cure.
At present, mud is utilized as part material in cement production process or to utilize mud to substitute the part coal in manufacture of cement in the inside and outside research topic becoming numerous scholar and a line scientific worker.
For external, mainly carrying out dewatered drying, burning owing to sewage plant sludge processes, its mud concentrates on the lime-ash after mixing sludge incineration to produce so-called eco-cement for the research of cement.
For domestic, mud carries out drying, it is the most highly difficult to burn, because the flocculation colloidal moisture structure water-retaining property of mud itself is fabulous, itself composition is the most extremely complex, is dehydrated, to dry operating cost high；Further, the harmful components such as chlor-alkali sulphur are the most higher or higher, have impact on cement performance；By coal-fired for mud Substitute For Partial or raw material, not only increase enterprise's coal, power consumption, hold in the palm height enterprise operation cost, also can affect kiln condition in production and run.
On the other hand, cloaca culvert, severe contamination groundwater resources are stored up or filled or be poured into industrial waste gypsum such as ardealite in a large number.But, the most still use the natural gypsum of resource-constrained at present when producing calcium sulphoaluminate cement, also result in the serious waste to gypsum resource.
Manufacture of cement is high energy-consuming enterprises, improves the burn-ability of grog to reduce sinter leaching energy consumption, promotes environmental protection, makes sulfur dioxide and oxynitride discharge up to standard, always the important research direction of cement industry energy-saving and emission-reduction.Traditional dry-process rotary kilns produce, because raw materials and fuel nitrogen sulfur content is higher, it is impossible to meet environmental emission standard.For solving this problem, prior art is to allocate calcium hydroxide or carbide slag in raw material into, or sprays into limewash or soda ash in flue or Vertical Mill.To use ammoniacal liquor, urea element to spray in dore furnace in terms of denitration, captured the oxygen in oxynitrides by the hydrogen in ammoniacal liquor urea, make the emission compliance of oxynitrides, but so also have compressed the profit margin that enterprise is the most meagre.In traditional shaft kiln cement energy-saving technical scheme with wet process rotary kiln manufacture of cement, for improving the burn-ability of grog and burning till quality, reduce and burn till energy consumption, widely used grog seed technology, i.e. adds the grog mineral crystal seed as clinker burning in raw material.
On this basis, we are through checking repeatedly: one, hydrosilicate mineral after hydrated cementitious solidification are allocated into also to have in raw material and are allocated the grog crystal seed effect that grog is same into, i.e. product---hydrosilicate mineral can be as grog crystal seed presoma in aquation generation, grog crystal seed presoma is become anhydrous silicate mineral by thermal decomposition i.e. dehydration, calcine together with raw material and become effective grog crystal seed mineral, they are two years old, dry-process rotary kiln raw material are allocated into grog crystal seed or grog crystal seed presoma can significantly improve grog burn-ability equally, reduce and burn till energy consumption, it is crucial that to have the grog crystal seed mineral of the valency that can mix or grog crystal seed presoma to think that in psychological value dry-process rotary kiln portland cement clinker cost is high because of enterprise, and the quantity of the grog size of capacity its required grog crystal seed very big is big.
nullChinese patent application 200910102069.4 discloses a kind of method utilizing cement plant smoke residual heat to dry sludge and firing sludge cement，Cement plant fume afterheat is utilized to carry out two-period form sludge drying，After first the mud of water content after mechanical dehydration 75～85% being aged 3～5 days and pre-processes by overturning mixer，Then tentatively dry with the first sludge drying granulating apparatus，Sludge water content is down to 56～63%,It is re-fed into the second sludge drying granulating apparatus to dry further，Rely on the thermal current in drying unit and chain、Hammering device by sludge drying to moisture content 36～the mud granule of 45% particle diameter 1～8mm，Again this mud granule is cooled down，Dehydration is to moisture content 15～the mud grain of 30% further，Then mud granule 30～50% is mixed with clayey raw material，Form mud-clayey compound，Again using this compound as Portland cement raw meal proportioning.This utilizes the furnace drying method complex process of dehydrated sludge, equipment investment big, runs power consumption high, and there is obvious secondary pollution hidden danger.Although, define the ratio of dewatered sludge by reducing the impact on kiln condition and yield and quality, but grog burnt till still without actively indemnifying measure.
Chinese patent application 200710045299.2 discloses clinker and the production method thereof that a kind of dewatered sludge ingredient prepares, utilize a small amount of (2.3%) dewatered drying mud (moisture 30～40%), and particular types raw material---slag, flyash, sandstone and calcareous raw material raw meal prepared from lime, produce grog.This method can only dry mud on a small quantity, and needs to use specific slag raw material (mineral Han calcium silicates in slag) etc., it is impossible to realizes economy, dissolve mud to scale.
Chinese patent application 201410279157.2 discloses a kind of method that industrial residue mud produces cement cementitious material, directly industrial caustic chloride to mud and height is added water mixing, add water balling-up, the method grinding cement cementitious material after 300 DEG C～500 DEG C drying roastings.The method is not suitable for existing normal dry-process rotary kiln technique, and its cement can not be used for reinforced concrete work.
Chinese patent application 201410278336.4 discloses a kind of method that mud makes clinker, with the mud after dehydrating mix with silicon lime-ash and zeolite cream, add water balling-up, through the method that 300～500 DEG C of drying are roasted to clinker.The method is not suitable for existing normal dry-process rotary kiln technique, and silicon lime-ash limited source silicon ash is 600～2800 yuan/t according to quality difference price, far above cement.
Obviously, the method that existing technology does not provide effective, economic, easy extensive mud of dissolving.Prior art does not the most provide one can synchronize scale and dissolves large waste residue such as mud, industrial waste gypsum, and the method effectively producing belite-gypsum new material economically.
Summary of the invention
The technical problem to be solved in the present invention is, overcome the deficiencies in the prior art, a kind of method that boiling roaster mud, waste gypsum produce belite-gypsum material is provided, the method technique of this production belite-gypsum material is simple, control requires low, grinding energy and to burn till energy consumption low, large waste residue such as mud, industrial waste gypsum of can dissolving with having a large capacity and a wide range.
The present invention solves its technical problem and employed technical scheme comprise that, a kind of boiling roaster mud, waste gypsum produce the method for belite-gypsum material, comprise the following steps:
(1) high-moisture-contensludge sludge ridge grain crystal seed is turned to modified sewage sludge slag:
High-moisture-contensludge sludge is pumped in ridge tank, with continuous stirring by hydrophilic low hydratability and can hydration and hardening ridge crystal seed agent with there is activation excite and the accelerator of interfacial effect impact adds in mud, with 10～300 revs/min (preferably 50～200 revs/min；More preferably 80～150 revs/min) rotating speed continuously stir 0.6～6.0 hour (preferably 1～4 hour, more preferably 1.5～2.5 hours) and carry out ridge grain seeding, refilter and carry out separation of solid and liquid, obtain modified sewage sludge slag and filtrate；
(2) by step (1) gained modified sewage sludge slag and waste gypsum, barren rock slag and correction material, carry out raw meal proportioning and homogeneous in the ratio that percent mass proportioning is modified sewage sludge slag 15～50% (preferably 20～45%), waste gypsum 15～50% (preferably 25～42%), barren rock slag 20～50% (preferably 25～45%), correction material 0～15%, obtain raw material compound；
(3) step (2) gained raw material compound is sent in rotary drum drying machine or in drying crusher or be arranged in the baker in the flue of fluidized bed furnace top, utilize the waste gas hot blast of fluidized bed furnace, carry out drying sulphur solid with flue gas desulfurization；
(4) raw material compound after step (3) gained being dried and be equivalent to the broken coal-fired mixing of raw material compound 0～20%, add roasting in fluidized bed furnace, with the combustible in mud and the combustion heat supplying of additional fire coal, control the coefficient of excess air ＞ 10% of fluidized bed furnace internal oxidition atmosphere, in 950 DEG C～1400 DEG C, through roasting in 10～60 minutes, it is grog by raw material mixture roasting；
(5) by step (4) gained grog grinding, allocate into and be equivalent to clinker quality 0～the blending material of 100%, or allocate 0～the anhydrite of 40% and 0～the blending material of 60% into, grinding together, makes fineness 0.08mm and tails over the powder of ＜ 20%, or by step (4) gained grog, and blending material, anhydrite separate compiling become powder, remix uniformly, make fineness 0.08mm and tail over the powder of ＜ 20%,.
Further, in step (1), described hydrophilic low hydratability and can the ridge crystal seed agent of hydration and hardening be cement flour, chamotte powder etc..
Further, step (1) gained modified sewage sludge slag, both can be directly used for step (2) dispensing, it is possible to for step (2) dispensing after natural air drying；Described filtrate can be made industry cycling use of water or return sewage treatment plant.
Further, described step (2) dispensing includes with the step of homogeneous: 1) modified sewage sludge slag, waste gypsum, barren rock slag and correction being expected direct dispensing, be milled into raw meal powder with raymond grinding powder, fineness controls to tail over 10～50% at 0.08mm；2) being molded by described raw meal powder, obtain molding mass, described molding mass is the particle of particle diameter 3～20mm.
Further, described step (2) dispensing includes with the step of homogeneous:
Modified sewage sludge slag, bulk waste gypsum, waste stone dust or carbide slag and powdery are corrected and expects direct dispensing；
Roll over mixer with wheel and carry out spreading mixing homogeneous, obtain plasticity or half dry block material.
Further, described step (2) dispensing includes with the step of homogeneous: 1) waste gypsum granular to granular for block barren rock slag, correction material and block being carried out dispensing, be milled into powder with raymond grinding powder, powder fineness controls 0.08mm and tails over 10～50%；2) by step 1) powder that obtains carries out dispensing with modified sewage sludge slag, bulk waste gypsum, powdery or hygrometric state correction material (powder)；3) roll over mixer with wheel and carry out spreading mixing homogeneous, obtain plasticity or half dry block material.
Further, described correction material is alumina or high-alumina clay or high waste slag of aluminum.Described high waste slag of aluminum is that high alumina spoil, high alumina coal ash, high alumina give up one or more in brick etc..
Further, described barren rock slag is considering to be worth doing containing mudstone of exploitation limestone mine.Described barren rock slag also can partly or entirely substitute with lime stone or lime mud or waste limestone aggregate concrete or carbide slag.
Further, at least one during described waste gypsum can be ardealite, desulfurated plaster, fluorgypsum, gypsum mine waste, waste gypsum mould.
Further, in step (1), addition is described high-moisture-contensludge sludge quality the 0.4～5.5% of described ridge crystal seed agent, the addition of described accelerator is the 1/2 of ridge crystal seed agent addition.
Described high-moisture-contensludge sludge can be that political affairs water processes the primary mud or pond, lake, river course settled sludge produced.
Described modified sewage sludge slag can partly or entirely substitute with the ageing mud storing up solidification.Make raw material as used the ageing mud storing up solidification to replace high-moisture-contensludge sludge, there is not ridge modification problem owing to storing up the ageing mud of solidification, omit step (1).Other step, the two is identical.The described ageing mud storing up solidification, the most naturally stores up more than 3 months, the mud of ageing solidification the most naturally, can directly crush replacement modified sewage sludge slag of getting the raw materials ready.
Described step (2) can substitute with ball mill or other conventional grinding device with the Raymond mill in step (5).
Belite-gypsum material that the present invention prepares is a kind of performance novel gelled material between cement and gypsum, have that early strength is high, hardening is fast, basicity is low, swell value from microdilatancy to expanding adjustable controlled feature, and low cost.Suitably adjust component proportion, performance can be directly produced, belite-gypsum special cement that purposes is different, micro expansion compensation shrinkage cement, GRC goods low alkali cement, sulfate-resistant cement, also can blend material and anhydrite and Additive Production swelling agent, ground self-leveling gypsum and build ash, mortar and production building material product etc. by laying bricks or stones by adapted, also directly can sell common portland cement manufacturing enterprise outward by grog and be used for substituting the natural gypsum and part portland cement clinker.
The know-why of the present invention:
1) utilize the fluidized bed furnace can the feature of roasting inferior fuel and beta-dicalcium silicate, calcium sulphoaluminate, calcium sulfate mineral forming mechanism and characteristic, broad-spectrum belite-gypsum material is produced as target with large waste residues such as the boiling roaster mud of Low investment and industrial waste gypsums, it is the ridge particulate matter containing a large amount of grog crystal seed presoma mineral by sludge modification, raw meal proportioning is carried out together with waste gypsum etc., the Raymond mill using Low investment is dried with shaping, or Raymond mill mixes machine energy saving technique scheme with rolling, both raw grinding energy consumption can be greatly reduced, also solve the problem that burn-ability concrete in boiling roaster production, operating mode, high yield and low heat dissipation and desulfurization, the practical problems such as denitration.The grindability of porous clinker that speed is burnt is fabulous, and grinding energy can be greatly reduced, the purpose of reach to dissolve with the environmental protection mode scale of the energy-saving and emission-reduction mud having a large capacity and a wide range and industrial waste gypsum.
2) the hyperhydrated ability of the solid formation flocculation colloidization constituted for the clay class in mud, string class, microorganism and organic compound etc., with hydrophilic low hydratability and can the ridge crystal seed agent of hydration and hardening and there is activation excite and the synergy of accelerator of interfacial effect impact, destroy the strong water-retaining property micelle of mud, and interact and sandization and the solid formation in fibrillatable mud, it is allowed to be converted into the particulate matter of a large amount of hydrosilicate mineral, and be easily achieved separation of solid and liquid, and the solid slag separated is prone to natural air drying.
3) method that modified ridge turns to mud fine particle is utilized, on the one hand composition and the characteristic of mud are changed, make it easier to dispensing use, and provide the siliceous raw material easily generating belite mineral, on the other hand, utilize the hydrosilicate mineral of modified sewage sludge as grog crystal seed presoma, both improve the burn-ability of grog, and be allowed to the generation with calcium sulphoaluminate and match with crystal growth, stablize kiln operating mode, high temperature speed firing technique in being beneficial to, is greatly reduced sinter leaching energy consumption.
4) utilize a large amount of alkaline water compounds of the low hydrauture that the ridge grain seeding effect of mud produces, simple baking operation removes the acid SO in flue gas in fluidized bed furnace system2。
5) utilize the low hydrauture of hydrophily and can the ridge crystal seed agent of hydration and hardening be main, the inorganic matter in mud and combustable organic thing are reclaimed in the hardening that interacts, make the inorganic matter in mud be able to all of and form grog crystal seed presoma as the main siliceous raw material generating belite mineral, simultaneously, combustable organic thing in mud is also in company with entering raw material, with in raw material drying entrance fluidized bed furnace, organic matter in mud is exhaustive oxidation after-flame in 950 DEG C～1400 DEG C of high temperature oxidation stability atmosphere, organic moiety substitutes ammoniacal liquor or the urea element of denitration, both the combustable organic thing energy in mud had been taken full advantage of, denitration expense can be reduced again.
Beneficial effects of the present invention: 1) process is relatively simple, invests little, and it is low that dispensing and control require that relative manufacture of cement requires, mud and industrial waste gypsum treating capacity are big；2) broad-spectrum belite-gypsum material is produced with boiling roaster mud, waste gypsum etc., the cost of material is low for it, grinding pow consumption is low, it is low to burn till energy consumption, and speed firing technique production capacity is high, also can save desulfurization and denitration cost, easily for owner's acceptance, provide the outlet of practicable for the recycling of the mud having a large capacity and a wide range and waste gypsum etc.；3) both scale, resource, energy can dissolve mud and waste gypsum etc., again without other secondary pollution, also can save a large amount of energy consumption, alleviate environmental pollution, beneficially environmental protection.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
(1) the primary mud of sewage treatment plant, detects moisture percentage in sewage sludge 99%, butt solid formation content 1%.Ridge crystal seed agent cement flour, cement flour consumption is mud 4Kg per ton；Selecting the ZC-D1 type pulvis activation modification accelerator of Changsha Zi Chen Science and Technology Development Co., Ltd. exploitation, consumption is the 50% of ridge crystal seed agent mass ratio, mud 2Kg the most per ton.
Described mud is pumped in ridge tank, with continuous stirring cement flour and accelerator powder are added in mud, continuously stir 2 hours with 120 revs/min and carry out ridge grain seeding, the mud mixture processed pumps into chamber-type press filter press filtration and carries out separation of solid and liquid, obtain solid state modification sludge silt, filtrate is clear water, detects modified sewage sludge slag moisture content 34.6%, is directly used in raw meal proportioning；
Waste gypsum selects ardealite bulk cargo；
Barren rock slag selects the barren rock slag opening limestone sand stone ore mountain, particle diameter ＜ 5mm；
Alumina selected by correction material；
(2) above-mentioned modified sewage sludge slag, ardealite, barren rock slag and correction material are carried out two grades of raw meal proportionings and homogeneous for raw material；
Coal-fired selection anthracite is crushed to ＜ 15mm pellet；
The total proportioning of raw meal proportioning quality is: modified sewage sludge slag 43%, ardealite bulk cargo 25%, barren rock ground-slag 25%, correction material alumina 7%；Fire coal is the 2.7% of raw material gross weight；
First order raw meal quality dispensing is by barren rock slag 25: alumina 7 carries out dispensing, is milled into powder with raymond grinding powder, and powder fineness controls 0.08mm and tails over 18%；Second level raw meal proportioning is by described powder 32: modified sewage sludge slag 43: ardealite bulk cargo 25 carries out dispensing, then, roll over mixer to carry out spreading mixing homogeneous being half dry block material with wheel；
(3) by above-mentioned block material, dry in sending into drying crusher, and synchronize to utilize material drying to carry out the solid sulphur of flue gas desulfurization, dry the waste gas hot blast utilizing fluidized bed furnace；
(4) raw material compound and the fire coal got ready after drying add combustion heat supplying in fluidized bed furnace, coal-fired addition regards furnace temperature and adjusts, average dose is about the 2.7% of raw material total amount, utilizes the combustion heat supplying of the combustible in mud and additional fire coal that material is roasted to grog；
The coefficient of excess air controlling the oxidizing atmosphere in fluidized bed furnace is 20%, and in 1250 DEG C～1350 DEG C, in fluidized bed furnace, average roasting time 20 minutes, are grog by raw material compound fluidized bed roasting；On-line checking sulphur emissions 190ug/Nm3Left and right is up to standard；
(5) above-mentioned grog raymond grinding powder is milled into fineness 0.08mm and tails over the powder of 7%, i.e. make belite-gypsum plaster.
Detect this Binder Materials consumptive use of water normal consistence 22.7%, 47 minutes presetting periods, final setting time 59 minutes, 3 days rupture strength 3.4MPa, compression strength 24.7MPa, 7 days rupture strength 4.3MPa, compression strength 33.2MPa, 28 days rupture strength 4.7MPa, compression strength 36.3MPa, pH value 10.4, free swelling rate 0.09%.
Embodiment 2
(1) primary for sewage treatment plant mud is carried out ridge grain seeding modified, detect moisture percentage in sewage sludge 98.2%, butt solid formation content 1.8%.Ridge crystal seed agent cement flour, cement flour consumption is mud 9Kg per ton；Selecting the ZC-D2 type pulvis activation modification accelerator of Changsha Zi Chen Science and Technology Development Co., Ltd. exploitation, consumption is the 50% of ridge crystal seed agent mass ratio, mud 4.5Kg the most per ton.
Mud is pumped in ridge tank, with continuous stirring cement and accelerator powder are added in mud, continuously stir mud mixture with 90 revs/min and within 2 hours, carry out ridge grain seeding, the mud mixture that ridge grain seeding processes is pumped into chamber-type press filter press filtration and carries out separation of solid and liquid, obtaining solid state modification sludge silt, filtrate is clear water, detects modified sewage sludge slag moisture content 31.9%, 5 days detection moisture content of modified sewage sludge slag natural air drying are down to 9%, deliver to dispensing at feed proportioning.
Waste gypsum is selected ageing pain phosphorus gypsum to be crushed to ＜ 20mm and is got the raw materials ready；
Barren rock slag selects lime mud to substitute, and is crushed to particle diameter ＜ 20mm and gets the raw materials ready；
Useless high-alumina brick selected by correction material, is crushed to particle diameter ＜ 20mm and gets the raw materials ready.
(2) above-mentioned modified sewage sludge filter residue, waste gypsum, lime mud and correction material are carried out one-level level raw meal proportioning and homogenization for raw material；
Coal-fired selection brown coal crushing is got the raw materials ready to ＜ 25mm；
The total proportioning of raw meal proportioning is: modified sewage sludge slag 23%, ageing pain phosphorus gypsum 32%, lime mud 42%, the useless high-alumina brick 3% of correction material；Fire coal is the 8.5% of raw material gross weight；
Carrying out raw meal proportioning by said ratio, be milled into powder with raymond grinding powder, powder fineness controls 0.08mm and tails over 20%；Then, by the particulate material that pan-pelletizer water spray balling-up is φ 3～10mm；
(3) by above-mentioned particulate material, dry in sending into rotary drum drying machine, and synchronize to utilize material drying to carry out the solid sulphur of flue gas desulfurization, dry the waste gas hot blast utilizing fluidized bed furnace；
(4) raw material compound and the fire coal got ready after drying add burning in fluidized bed furnace, coal-fired addition regards furnace temperature and adjusts, average dose is about the 8.5% of raw material gross weight, and utilizing the combustible in mud and additional combustion burning of coal is grog by raw material mixture roasting；
The coefficient of excess air controlling the oxidizing atmosphere in fluidized bed furnace is 15%, within about 35 minutes, is grog in 980 DEG C～1180 DEG C by raw material compound fluidized bed roasting；On-line checking sulphur emissions 180ug/Nm3Left and right is up to standard.
(5) the above-mentioned skillful direct grinding of material Raymond mill is made fineness 0.08mm and tail over the powder of 10%, i.e. make belite-gypsum plaster.Detect this Binder Materials consumptive use of water normal consistence 22.4%, 45 minutes presetting periods, final setting time 56 minutes, 3 days rupture strength 3.3MPa, compression strength 21.6MPa, 7 days rupture strength 4.0MPa, compression strength 31.5MPa, 28 days rupture strength 4.3MPa, compression strength 34.9MPa, pH value 10.2, free swelling rate 0.1%.
Embodiment 3
(1) county town ditch cleaning mud is carried out ridge grain seeding modified, detect moisture percentage in sewage sludge 78.3%, butt solid formation content 21.7%.Ridge crystal seed agent cement flour, cement flour consumption is mud 50Kg per ton.Selecting the ZC-D3 type pulvis activation modification accelerator of Changsha Zi Chen Science and Technology Development Co., Ltd. exploitation, consumption is the 50% of ridge crystal seed agent mass ratio, mud 25Kg the most per ton.
Mud plunger displacement pump is pumped in ridge tank, with continuous stirring cement and accelerator powder are added in mud, continuously stir mud mixture with 90 revs/min and within 3 hours, carry out ridge grain seeding, mud mixture pumps into chamber-type press filter filter-press dehydration and separates, and obtains solid state modification sludge silt, and filtrate is clear water, detection modified sewage sludge slag moisture content 31.4%, modified sewage sludge slag natural air drying 2 days, detection moisture content is down to 12%, is delivered to dispensing at raw material.
Waste gypsum selects fresh bulk desulfurated plaster to get the raw materials ready；
Barren rock slag selects waste limestone aggregate concrete to substitute, and is crushed to particle diameter ＜ 15mm and gets the raw materials ready；
High-alumina clay selected by correction material；
(2) above-mentioned modified sewage sludge filter residue, waste gypsum, discarded concrete and correction material are carried out one-level raw meal proportioning and homogeneous for raw material；
Coal-fired selection bituminous coal is crushed to ＜ 15mm and gets the raw materials ready；
The total proportioning of raw meal proportioning is: modified sewage sludge slag 20%, bulk desulfurated plaster 40%, waste limestone aggregate concrete 35%, correction material high-alumina clay 5%；Fire coal is the 5% of raw material gross weight；
Carrying out raw meal proportioning by said ratio, be milled into powder with raymond grinding powder, powder fineness controls 0.08mm and tails over 13%；Then, with pan-pelletizer water spray balling-up be φ 3～12mm particulate material；
(3) by above-mentioned particulate material, dry in sending into rotary drum drying machine, and synchronize to utilize material drying to carry out the solid sulphur of flue gas desulfurization, dry the whole waste gas hot blasts utilizing fluidized bed furnace；
(4) material and the fire coal got ready after drying add burning in fluidized bed furnace, and coal-fired addition regards furnace temperature adjustment, and average dose is about the 5% of raw material total amount, and raw material mixture roasting is grog by the combustion heat supplying utilizing the combustible in mud and additional fire coal；
The coefficient of excess air controlling the oxidizing atmosphere in fluidized bed furnace is 25%, within 30 minutes, is grog in 1250 DEG C～1300 DEG C by raw material compound fluidized bed roasting；On-line checking sulphur emissions 190ug/Nm3Left and right is up to standard.
(5) the above-mentioned direct grinding of skillful material is made fineness 0.08mm and tail over the powder of 6%, i.e. make belite-gypsum plaster.Detect this Binder Materials consumptive use of water normal consistence 22.3%, 39 minutes presetting periods, final setting time 48 minutes, 3 days rupture strength 3.9MPa, compression strength 25.7MPa, 7 days rupture strength 4.0MPa, compression strength 33.1MPa, 28 days rupture strength 4.8MPa, compression strength 36.6MPa, pH value 10.2, free swelling rate 0.1%.
Embodiment 4
(1) sewage treatment plant's dewatered sludge is carried out ridge grain seeding modified, detect moisture percentage in sewage sludge 83%, butt solid formation content 17%.Ridge crystal seed agent cement flour, cement flour consumption is mud 35Kg per ton；Selecting the ZC-D3 type pulvis activation modification accelerator of Changsha Zi Chen Science and Technology Development Co., Ltd. exploitation, consumption is the 50% of ridge crystal seed agent mass ratio, mud 17.5Kg the most per ton.
Mud is pumped in ridge tank, with continuous stirring cement and accelerator powder are added in mud, continuously stir mud mixture with 120 revs/min and within 3 hours, carry out ridge grain seeding, the mud mixture that ridge grain seeding processes is pumped into chamber-type press filter filter-press dehydration separate, obtain solid state modification sludge silt, filtrate is clear water, detects modified sewage sludge slag moisture content 32.1%, is directly used in raw meal proportioning；
Waste gypsum selects fresh bulk ardealite to get the raw materials ready；
Barren rock slag selects dry acetylene sludge to substitute；
(2) above-mentioned modified sewage sludge filter residue, waste gypsum, carbide slag and correction material are carried out raw meal proportioning and homogeneous for raw material；
Coal-fired selection anthracite is crushed to ＜ 15mm and gets the raw materials ready；
The total proportioning of raw meal proportioning is: modified sewage sludge slag 30%, ardealite 40%, carbide slag 30%, correction material 0%；Fire coal is the 6% of raw material gross weight；
Above-mentioned raw material raw material can be without grinding, by above-mentioned raw meal proportioning proportioning, after directly carrying out raw meal proportioning, roll over mixer to carry out spreading mixing homogeneous being half dry block material with wheel；
(3) by above-mentioned block material, send into the staged baker being arranged in the flue of fluidized bed furnace top and dry, and synchronize to utilize material drying to carry out the solid sulphur of flue gas desulfurization, dry the whole waste gas hot blasts utilizing fluidized bed furnace；
(4) material after staged baker is dried the most descending enter fluidized bed furnace burner hearth, that gets ready coal-fired adds burning in fluidized bed furnace, and coal-fired addition regards furnace temperature and adjusts, and coal-fired average dose is about the 6% of raw material total amount；
The coefficient of excess air controlling the oxidizing atmosphere in fluidized bed furnace is 18%, within about 25 minutes, is grog in 1300 DEG C～1350 DEG C by raw material compound fluidized bed roasting；On-line checking sulphur emissions 190ug/Nm3Left and right is up to standard；
(5) the above-mentioned direct grinding of grog Raymond mill is made fineness 0.08mm and tail over the powder of 7%, i.e. make belite-gypsum plaster.Detect this Binder Materials consumptive use of water normal consistence 22.7%, 40 minutes presetting periods, final setting time 51 minutes, 3 days rupture strength 4.0MPa, compression strength 31.7MPa, 7 days rupture strength 4.7MPa, compression strength 39.2MPa, 28 days rupture strength 6.1MPa, compression strength 45.4MPa, pH value 10.3, free swelling rate 0.09%.
Embodiment 5
(1) primary for sewage treatment plant mud is carried out ridge grain seeding modified, detect moisture percentage in sewage sludge 98.6%, butt solid formation content 1.4%.Ridge crystal seed agent cement flour, cement flour consumption is mud 7Kg per ton.Selecting the ZC-D1 type pulvis activation modification accelerator of Changsha Zi Chen Science and Technology Development Co., Ltd. exploitation, consumption is the 50% of ridge crystal seed agent mass ratio, mud 3.5Kg the most per ton.
Mud is pumped in ridge tank, with continuous stirring cement and accelerator powder are added in mud, continuously stir mud mixture with 120 revs/min and within 2 hours, carry out ridge grain seeding, mud mixture pumps into chamber-type press filter filter-press dehydration and separates, obtain solid state modification sludge silt, filtrate is clear water, detects modified sewage sludge slag moisture content 28.9%.
Waste gypsum selects fresh bulk ardealite to get the raw materials ready；
Barren rock slag selects the discarded rock ballast opening limestone sand stone ore mountain, particle diameter ＜ 5mm；
Alumina selected by correction material；
(2) above-mentioned modified sewage sludge filter residue, waste gypsum, barren rock slag and correction material are carried out two-stage raw meal proportioning and homogeneous for raw material；Coal-fired selection anthracite is crushed to ＜ 15mm and gets the raw materials ready；
The total proportioning of raw meal proportioning is: modified sewage sludge slag 30%, bulk ardealite 30%, barren rock slag 30%, correction material alumina 10%；Fire coal is the 7% of raw material gross weight；
First order raw meal proportioning is by barren rock slag 30: alumina 10 carries out dispensing, is milled into powder with raymond grinding powder, and powder fineness controls 0.08mm and tails over 14%；Second level raw meal proportioning is by powder 40: modified sewage sludge slag 30: bulk ardealite 30 carries out dispensing, then, roll over mixer to carry out spreading mixing homogeneous being half dry block material with wheel；
(3) by above-mentioned block material, dry in sending into drying crusher, and synchronize to utilize material drying to carry out the solid sulphur of flue gas desulfurization, dry the whole waste gas hot blasts utilizing fluidized bed furnace；
(4) material and the fire coal got ready after drying add burning in fluidized bed furnace, and coal-fired addition regards furnace temperature adjustment, and average dose is about the 7% of raw material total amount, utilizes the combustion heat supplying of the combustible in mud and additional fire coal that material is roasted to grog；
The coefficient of excess air controlling the oxidizing atmosphere in fluidized bed furnace is 25%, and in 1300 DEG C～1400 DEG C, average roasting time about 18 minutes, is grog by raw material compound fluidized bed roasting；On-line checking sulphur emissions 190ug/Nm3Left and right is up to standard.
(5) the above-mentioned direct grinding of grog Raymond mill is made fineness 0.08mm and tail over the powder of 5%, i.e. make belite-gypsum plaster.Detect this Binder Materials consumptive use of water normal consistence 22.9%, 41 minutes presetting periods, final setting time 53 minutes, 3 days rupture strength 4.5MPa, compression strength 32.7MPa, 7 days rupture strength 4.6MPa, compression strength 40.2MPa, 28 days rupture strength 5.4MPa, compression strength 48.7MPa, pH value 10.4, free swelling rate 0.1%.
Claims (10)
1. the method producing belite-gypsum material with boiling roaster mud, waste gypsum, it is characterised in that comprise the following steps:
(1) high-moisture-contensludge sludge ridge grain crystal seed is turned to modified sewage sludge slag:
High-moisture-contensludge sludge is pumped in ridge tank, with continuous stirring by hydrophilic low hydratability and can hydration and hardening ridge crystal seed agent with there is activation excite and the accelerator of interfacial effect impact adds in mud, continuously stir 0.6～6.0 hour with the rotating speed of 10～300 revs/min and carry out ridge grain seeding, refilter and carry out separation of solid and liquid, obtain modified sewage sludge slag and filtrate；
(2) by step (1) gained modified sewage sludge slag and waste gypsum, barren rock slag and correction material, carry out raw meal proportioning and homogeneous in the ratio that percent mass proportioning is modified sewage sludge slag 15～50%, waste gypsum 15～50%, barren rock slag 20～50%, correction material 0～15%, obtain raw material compound；
(3) step (2) gained raw material compound is sent in rotary drum drying machine or in drying crusher or be arranged in the baker in the flue of fluidized bed furnace top, utilize the waste gas hot blast of fluidized bed furnace, carry out drying sulphur solid with flue gas desulfurization；
(4) by step (3) gained dry after raw material compound and be equivalent to raw material compound 0～the broken fire coal of 20%, add roasting in fluidized bed furnace, with the combustible in mud and the combustion heat supplying of additional fire coal, control the coefficient of excess air ＞ 10% of fluidized bed furnace internal oxidition atmosphere, in 950 DEG C～1400 DEG C, through roasting in 10～60 minutes, it is grog by raw material mixture roasting；
(5) by step (4) gained grog grinding, allocate into and be equivalent to clinker quality 0～the blending material of 100%, or allocate 0～the anhydrite of 40% and 0～the blending material of 60% into, grinding together, makes fineness 0.08mm and tails over the powder of ＜ 20%, or by step (4) gained grog, and blending material, anhydrite separate compiling become powder, remix uniformly, make fineness 0.08mm and tail over the powder of ＜ 20%,.
2. the as claimed in claim 1 method producing belite-gypsum material with boiling roaster mud, waste gypsum, it is characterised in that in step (1), described hydrophilic low hydratability and can the ridge crystal seed agent of hydration and hardening be cement flour or/and chamotte powder.
3. the method producing belite-gypsum material with boiling roaster mud, waste gypsum as claimed in claim 1, it is characterised in that step (1) gained modified sewage sludge slag, is used for step (2) after being directly used in step (2) or natural air drying；Described filtrate is made industry cycling use of water or returns the further purified treatment of sewage treatment plant.
4. the method producing belite-gypsum material with boiling roaster mud, waste gypsum as claimed in claim 1, it is characterised in that described step (2) dispensing includes with the step of homogeneous:
1) modified sewage sludge slag, waste gypsum, barren rock slag and correction being expected direct dispensing, be milled into raw meal powder with raymond grinding powder, fineness controls to tail over 10～50% at 0.08mm；
2) being molded by described raw meal powder, obtain molding mass, described molding mass is the particle of particle diameter 3～20mm.
5. the method producing belite gypsum material with boiling roaster mud, waste gypsum as claimed in claim 1, it is characterized in that, in step (2), described waste gypsum is bulk waste gypsum, described barren rock slag is waste stone dust or carbide slag, and described correction material is powdery correction material；Dispensing includes with the step of homogeneous:
1) modified sewage sludge slag, bulk waste gypsum, waste stone dust or carbide slag and powdery are corrected material and carry out dispensing；
2) roll over mixer with wheel and carry out spreading mixing homogeneous, obtain plasticity or half dry block material.
6. the method producing belite-gypsum material with boiling stove roasting mud, waste gypsum as claimed in claim 1, it is characterized in that, in step (2), described waste gypsum is the granular waste gypsum of block and bulk waste gypsum, described barren rock slag is block granular barren rock slag, described correction material is powdery or hygrometric state correction material, and dispensing includes with the step of homogeneous:
1) waste gypsum granular to granular for block barren rock slag, correction material and block being carried out dispensing, be milled into powder with raymond grinding powder, powder fineness controls 0.08mm and tails over 10～50%；
2) powder step 1) obtained carries out dispensing with modified sewage sludge slag, bulk waste gypsum, powdery or hygrometric state correction material；
3) roll over mixer with wheel and carry out spreading mixing homogeneous, obtain plasticity or half dry block material.
7. the method producing belite-gypsum material with boiling roaster mud, waste gypsum as described in any one in claim 1 to 6, it is characterised in that described barren rock slag is considering to be worth doing containing mudstone of exploitation limestone mine；Described correction material is alumina or high-alumina clay or high waste slag of aluminum.
8. the method producing belite-gypsum material with boiling roaster mud, waste gypsum as described in any one in claim 1 to 6, it is characterized in that, described waste gypsum is at least one in ardealite, desulfurated plaster, fluorgypsum, gypsum mine waste, waste gypsum mould.
9. the method producing belite-gypsum material with boiling roaster mud, waste gypsum as described in any one in claim 1 to 6, it is characterised in that described barren rock slag lime stone or lime mud or carbide slag or waste limestone aggregate concrete replace.
10. the method producing belite-gypsum material with boiling roaster mud, waste gypsum, it is characterised in that comprise the following steps:
(1) the ageing mud of solidification, waste gypsum, barren rock slag and correction material will be stored up, be to store up the ratio of the ageing mud 15 of solidification～50%, waste gypsum 15～50%, barren rock slag 20～50%, correction material 0～15% to carry out the raw material compound of raw meal proportioning and homogeneous in percent mass proportioning；
(2) step (1) gained raw material compound is sent in rotary drying machine or in drying crusher or be arranged in the baker in the flue of fluidized bed furnace top, the whole waste gas hot blasts utilizing fluidized bed furnace carry out drying sulphur solid with flue gas desulfurization, obtain the raw material compound after drying；
(3) raw material compound after step (2) gained being dried and be equivalent to the broken coal-fired mixing of raw material compound 0～20%, add roasting in fluidized bed furnace, with the combustible in mud and the combustion heat supplying of additional fire coal, the coefficient of excess air ＞ 10% of the oxidizing atmosphere in control fluidized bed furnace, in 950 DEG C～1400 DEG C, through roasting in 10～60 minutes, it is grog by raw material mixture roasting；
(4) by step (3) gained grog, allocate into and be equivalent to clinker quality 0～the blending material of 100%, or allocate 0～the anhydrite of 40% and 0～the blending material of 60%, grinding together into, make fineness 0.08mm and tail over the powder of ＜ 20%, or by described step (3) gained grog, and blending material, anhydrite, separate compiling becomes powder, remixes uniformly, make fineness 0.08mm and tail over the powder of ＜ 20%,.
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Effective date of registration: 20161209 Address after: 410205 Hunan province Changsha Wenxuan High-tech Development Zone, Road No. 27 Lu Valley Yuyuan D3-101 building two floor Patentee after: CHANGSHA ZICHEN TECHNOLOGY DEVELOPMENT CO., LTD. Address before: 410013 Hunan province high tech Development Zone C2 group Binjiang fortune Silicon Valley building, room 5, building 510, room Patentee before: Yin Xiaolin |