CN102838308A - Expanded clinker as well as expansion agent and preparation method thereof - Google Patents
Expanded clinker as well as expansion agent and preparation method thereof Download PDFInfo
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- CN102838308A CN102838308A CN2012103493637A CN201210349363A CN102838308A CN 102838308 A CN102838308 A CN 102838308A CN 2012103493637 A CN2012103493637 A CN 2012103493637A CN 201210349363 A CN201210349363 A CN 201210349363A CN 102838308 A CN102838308 A CN 102838308A
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Abstract
The invention provides an expanded clinker and an expansion agent thereof. The expansion agent is formed from the following components: 30-70% of f-CaO, 15-40% of C3S, 6-12% of C4AF, 1-8% of f-CaS, 1-3% of C3A, 0.5-2% of CaS and 0.5-5% of MgO. A preparation method of the expansion agent comprises the following steps of: preparing raw materials; calcining the raw materials in a rotary kiln with clean coal to obtain the expanded clinker; grinding to obtain a concrete expanding agent, wherein the raw materials comprise 88-95% of gypsum, 4-8% of coke and 1-4% of iron powder; Fe2O3 in the iron powder is more than or equal to 60%; the coke is the coke with fixed carbon content of being more than or equal to 70% and volatile component content of being less than or equal to 5%; and SO3 in the gypsum is more than or equal to 38%. Documents at home and abroad do not record the concrete expanding agent which is formed by preparing calcium oxide clinker by calcium oxide waste dreg in a gypsum sulfuric acid preparing process to manufacture the concrete expanding agent and a method thereof, the concrete expanding agent product completely reaches to the national standard, even can reach to a GB23439-2009 II type standard. According to the expanded clinker and the expansion agent thereof disclosed by the invention, a full-new technology development direction which utilizes gypsum ores with an abundant resource in China as main materials to produce the expanding agent is explored.
Description
Technical field
The present invention relates to a kind of concrete expansive clinker, swelling agent and preparation method thereof, being specifically related to a kind of is concrete expansive clinker, swelling agent and the preparation method that major ingredient makes with the gypsum, belongs to chemical industry, material of construction production field.
Background technology
Both at home and abroad when using gypsum to make sulfuric acid; For solving the quicklime waste residue after gypsum decomposes; The common technological line that adopts the jointly producing cement grog and process cement is like main office of Shandong northern Shandong group of enterprises " a kind of gypsum is produced the change technology of sulfuric acid and cement " patent, application number 200810139276.2; " utilize anhydrite to produce the method for producing sulfuric acid and jointly high belite cement " patent, the application number 200510031351.X of Xiangfu New Building Material Co., Ltd, Hunan.
U.S. P.K.Mehta proposes to consist of 40～70% A Lite, 20～30%fCaO and 10～20%CaSO
4Mixture, have good expansion characteristics.Contain big A Lite crystallization and little CaO crystallization in this swelling agent.
The lime swelling agent that Japan Onoda Cement Co., Ltd produces contains 20～30% fCaO in the high calcium clinker, in A Lite (C3S) the crystallization gap more than 200 μ m, and the granular CaO crystallization in the garden of 15～20 μ m that distributing.
During Wang Yansheng etc. development CEA swelling agent, be, add an amount of alunite and gypsum again and grind and form with the high calcium clinker that contains fCaO 20～30%.Produce quicklime-calcium sulphoaluminate class swelling agent.
Both at home and abroad when manufacturing contains the expansive clinker of quicklime composition/swelling agent, all adopt Wingdale (CaCO
3) obtain the quicklime composition, also will utilize the expensive mineral reserve of resource scarcity such as bauxitic clay, price simultaneously as calcareous raw material.With aboundresources, cheap gypsum (CaSO
4, CaSO
42H
2O, CaSO
40.5H
2O) be calcareous raw material, produce quicklime expansive clinker/swelling agent and still do not have record in the document at home and abroad.
Summary of the invention
The object of the present invention is to provide a kind of expansive clinker, this expansive clinker is met the swelling agent of GB fully after the grinding configuration, with low cost.
Another object of the present invention is to provide a kind of swelling agent, this swelling agent is calcareous raw material with the gypsum, and this swelling agent each item index all meets the GB requirement, has made full use of aboundresources, cheap gypsum, has the very big market competitiveness.
Another purpose of the present invention is to provide the preparation method of above-mentioned swelling agent, and this technology has realized the efficient utilization of resource.
A purpose more of the present invention is to provide the preparation method of above-mentioned expansive clinker.
The objective of the invention is to realize through following technical measures:
A kind of expansive clinker is characterized in that, it is composed of the following components, all in weight percentage: f-CaO:30%～70%, C
3S:15%～40%, C
4AF:6%～12%, f-CaSO
4: 1～8%, C
3A:1%～3%, CaS:0.5～2%, MgO:0.5～5%.
A kind of swelling agent, it is that expansive clinker by following component makes behind grinding, all in weight percentage: f-CaO:30%～70%, C
3S:15%～40%, C
4AF:6%～12%, f-CaSO
4: 1～8%, C
3A:1%～3%, CaS:0.5～2%, MgO:0.5～5%.
A kind of swelling agent, it is to be made behind grinding by 30%～70% expansive clinker and 30%～70% anhydrite, said expansive clinker is by f-CaO:30%～70%, C
3S:15%～40%, C
4AF:6%～12%, f-CaSO
4: 1～8%, C
3A:1%～3%, CaS:0.5～2%, MgO:0.5～5% is formed, all in weight percentage.
A kind of swelling agent, it is to be made behind grinding by 30%～50% expansive clinker, 20%～30% anhydrite and 20%～40% blast-furnace slag, said expansive clinker is by f-CaO:30%～70%, C
3S:15%～40%, C
4AF:6%～12%, f-CaSO
4: 1～8%, C
3A:1%～3%, CaS:0.5～2%, MgO:0.5～5% is formed; All in weight percentage.
In order further to improve the quality of above-mentioned swelling agent, it is 250～350m that above-mentioned expansive clinker or expansive clinker and anhydrite or expansive clinker and anhydrite and ground granulated blast furnace slag are milled to specific surface area
2/ kg obtains swelling agent, more preferably 300m
2/ kg.
A kind of technology of gypsum system producing sulfuric acid and jointly cement expansive material; It is characterized in that: said technology is that outfit, the raw material of raw material adopt the cleaned coal calcining in rotary kiln; Calcining gained sulfur dioxide gas prepares sulfuric acid, and the continuation of gained quicklime cleaned coal calcining, grinding in rotary kiln make cement expansive material; Said raw material are gypsum: 88%～95%, coke 4%～8%, iron powder 1%～4%, Fe in the said iron powder
2O
3>=60%, said coke is the coke of fixed carbon content>=70%, volatile matter≤5%, SO in the said gypsum
3>=38%, all in weight percentage.
Gypsum in the above-mentioned raw material can adopt the gypsum of any kind; Natural anhydrite, dihydrate gypsum or industry by-product gypsum are like phosphogypsum, fluorgypsum, desulfurated plaster etc., the iron powder in the above-mentioned raw material; Being that this area is equal knows, extracts the waste residue that obtains behind the sulfurous gas for utilizing sulfurous iron ore.At above-mentioned raw material and form under the known situation; Adopt above-mentioned raw material in rotary kiln, to calcine the reaction process that obtains sulfurous gas and quicklime, sulfurous gas is prepared sulfuric acid, quicklime is continued to calcine the reaction process that obtains expansive clinker all is conventional concerning this area.
Above-mentioned raw material are calcined in rotary kiln, and the reaction that calcination process takes place comprises:
Adopting the technology of co-producing sulphuric acid and cement by using gypsum is known at present, no matter still all has no precedent relevant report at present at home abroad but will adopt gypsum to prepare the producing sulfuric acid and jointly swelling agent, because of cement and swelling agent are diverse product categories.The contriver finds in the comprehensive utilization of research gypsum: coke has the effect of decomposing gypsum, and the iron powder that the present invention adopts has promotion C in calcination process
3The formation of S, and the effect of wrapping up free calcium oxide, delaying the free calcium oxide hydration rate is arranged.So the contriver expects utilizing these characteristics of coke, iron powder; But in actually operating, usually occur gypsum again and decompose not exclusively, perhaps be prone to produce toxic minerals such as CaS; Influenced the quality of the swelling agent that finally makes greatly, required, lost its market competitiveness if the bad swelling agent that makes of control can not satisfy GB at all.The contriver is that the swelling agent quality that major ingredient prepares meets the GB requirement fully through testing repeatedly and sum up, making with the gypsum finally, has made full use of the Gypsum Mine that china natural resources is enriched, with low cost.
In order further to improve the quality of prepared swelling agent, the carbon sulphur mol ratio in the above-mentioned raw material is controlled at 0.6～0.72: 1.
Further, the SO of anhydrite in the above-mentioned raw material
3>=45%, in weight percentage.
Further, the cleaned coal that adopts in the above-mentioned rotary kiln is preferably and contains ash≤20%, volatile matter>=22%.
In order further to improve the quality of prepared swelling agent, preferably above-mentioned gypsum, coke and iron powder raw material combined grinding to granularity are tailed over 8～16%, by weight percentage for the 0.08mm square hole sieve.
Preferably, in the preparation process of above-mentioned swelling agent, the cleaned coal calcining obtains expansive clinker to the continuation of gained quicklime in rotary kiln, grinding makes cement expansive material, and said grinding process is to be 250～350m with expansive clinker grinding to specific surface area directly
2/ kg obtains cement expansive material, and maybe the expansive clinker that obtains and anhydrite or expansive clinker and anhydrite and ground granulated blast furnace slag being milled to specific surface area is 250～350m
2/ kg obtains cement expansive material, and more preferably grinding to specific surface area is 300m
2/ kg.
Specifically, above-mentioned raw material are calcined gained SO in rotary kiln
2Gas is processed 98% sulfuric acid through dedusting by ordinary method, and CaO further is fired to 1350～1450 ℃ and makes f-CaO, C
3S, C
3A, C
4AF, f-CaSO
4, CaS is the quicklime expansive clinker that essential mineral is formed, our called after SCEA quicklime expansive clinker.In rotary kiln, calcine, rotary kiln can adopt hollow rotary kiln known in the art, shaft preheater rotary kiln or cyclone preheater rotary kiln.
A kind of preparation method of swelling agent is characterized in that: said preparation method makes cement expansive material through grinding again for outfit, the raw material of raw material adopt the cleaned coal calcining to obtain expansive clinker in rotary kiln; Said raw material are gypsum: 88%～95%, coke 4%～8%, iron powder 1%～4%, Fe in the said iron powder
2O
3>=60%, said coke is the coke of fixed carbon content>=70%, volatile matter≤5%, SO in the said gypsum
3>=38%, all in weight percentage.
Gypsum in the above-mentioned raw material can adopt the gypsum of any kind; Natural anhydrite, dihydrate gypsum or industry by-product gypsum are like phosphogypsum, fluorgypsum, desulfurated plaster etc., the iron powder in the above-mentioned raw material; Being that this area is equal knows, extracts the waste residue that obtains behind the sulfurous gas for utilizing sulfurous iron ore.At above-mentioned raw material and form under the known situation, adopting above-mentioned raw material in rotary kiln, to calcine the reaction process that obtains expansive clinker is conventional to this area.
Above-mentioned raw material are calcined in rotary kiln, and the reaction that calcination process takes place comprises:
In order further to improve the quality of prepared swelling agent, the carbon sulphur mol ratio in the above-mentioned raw material is controlled at 0.6～0.72: 1.
Further, the SO of anhydrite in the above-mentioned raw material
3>=45%, in weight percentage.
Further, the cleaned coal that adopts in the above-mentioned rotary kiln is preferably and contains ash≤20%, volatile matter>=22%.
In order further to improve the quality of prepared swelling agent, preferably above-mentioned gypsum, coke and iron powder raw material combined grinding to granularity are tailed over 8～16%, by weight percentage for the 0.08mm square hole sieve.
Preferably, in the preparation process of above-mentioned swelling agent, the cleaned coal calcining obtains expansive clinker to the continuation of gained quicklime in rotary kiln, grinding makes cement expansive material, and said grinding process is to be 250～350m with expansive clinker grinding to specific surface area directly
2/ kg obtains cement expansive material, and maybe the expansive clinker that obtains and anhydrite or expansive clinker and anhydrite and ground granulated blast furnace slag being milled to specific surface area is 250～350m
2/ kg obtains cement expansive material, and more preferably grinding to specific surface area is 300m
2/ kg.
A kind of technology of gypsum system producing sulfuric acid and jointly concrete expansive clinker; It is characterized in that: said technology is that outfit, the raw material of raw material adopt the cleaned coal calcining in rotary kiln; Calcining gained sulfur dioxide gas prepares sulfuric acid, and gained quicklime continuation cleaned coal calcining in rotary kiln makes the concrete expansive clinker; Said raw material are gypsum: 88%～95%, coke 4%～8%, iron powder 1%～4%, Fe in the said iron powder
2O
3>=60%, said coke is the coke of fixed carbon content>=70%, volatile matter≤5%, SO in the said gypsum
3>=38%, all in weight percentage.
Gypsum in the above-mentioned raw material can adopt the gypsum of any kind; Natural anhydrite, dihydrate gypsum or industry by-product gypsum are like phosphogypsum, fluorgypsum, desulfurated plaster etc., the iron powder in the above-mentioned raw material; Being that this area is equal knows, extracts the waste residue that obtains behind the sulfurous gas for utilizing sulfurous iron ore.At above-mentioned raw material and form under the known situation; Adopt above-mentioned raw material in rotary kiln, to calcine the reaction process that obtains sulfurous gas and quicklime, sulfurous gas is prepared sulfuric acid, quicklime is continued to calcine the reaction process that obtains expansive clinker all is conventional concerning this area.
Above-mentioned raw material are calcined in rotary kiln, and the reaction that calcination process takes place comprises:
In order further to improve the quality of prepared expansive clinker, the carbon sulphur mol ratio in the above-mentioned raw material is controlled at 0.6～0.72: 1.
Further, the SO of anhydrite in the above-mentioned raw material
3>=45%, in weight percentage.
Further, the cleaned coal that adopts in the above-mentioned rotary kiln is preferably and contains ash≤20%, volatile matter>=22%.
In order further to improve the quality of prepared expansive clinker, preferably above-mentioned gypsum, coke and iron powder raw material combined grinding to granularity are tailed over 8～16%, by weight percentage for the 0.08mm square hole sieve.
Specifically, above-mentioned raw material are calcined gained SO in rotary kiln
2Gas is processed 98% sulfuric acid through dedusting by ordinary method, and CaO further is fired to 1350～1450 ℃ and makes f-CaO, C
3S, C
3A, C
4AF, f-CaSO
4, CaS is the quicklime expansive clinker that essential mineral is formed, our called after SCEA quicklime expansive clinker.In rotary kiln, calcine, rotary kiln can adopt hollow rotary kiln known in the art, shaft preheater rotary kiln or cyclone preheater rotary kiln.
A kind of preparation method of expansive clinker is characterized in that: said preparation method makes the concrete expansive clinker for outfit, the raw material of raw material adopt the cleaned coal calcining in rotary kiln; Said raw material are gypsum: 88%～95%, coke 4%～8%, iron powder 1%～4%, Fe in the said iron powder
2O
3>=60%, said coke is the coke of fixed carbon content>=70%, volatile matter≤5%, SO in the said gypsum
3>=38%, all in weight percentage.
Gypsum in the above-mentioned raw material can adopt the gypsum of any kind; Natural anhydrite, dihydrate gypsum or industry by-product gypsum are like phosphogypsum, fluorgypsum, desulfurated plaster etc., the iron powder in the above-mentioned raw material; Being that this area is equal knows, extracts the waste residue that obtains behind the sulfurous gas for utilizing sulfurous iron ore.At above-mentioned raw material and form under the known situation, adopting above-mentioned raw material in rotary kiln, to calcine the reaction process that obtains expansive clinker all is conventional concerning this area.
In order further to improve the quality of prepared expansive clinker, the carbon sulphur mol ratio in the above-mentioned raw material is controlled at 0.6～0.72: 1.
Further, the SO of anhydrite in the above-mentioned raw material
3>=45%, in weight percentage.
Further, the cleaned coal that adopts in the above-mentioned rotary kiln is preferably and contains ash≤20%, volatile matter>=22%.
In order further to improve the quality of prepared expansive clinker, preferably above-mentioned gypsum, coke and iron powder raw material combined grinding to granularity are tailed over 8～16%, by weight percentage for the 0.08mm square hole sieve.
The present invention has following beneficial effect:
The present invention utilizes in the gypsum process for preparing sulfuric acid quicklime waste residue is processed quicklime expansive clinker and cement expansive material of processing and method thereof, does not still have record at home and abroad in the document.And cement expansive material product of the present invention is up to state standards fully, even can reach the II type standard of GB23439-2009.The present invention has opened up and has utilized the abundant Gypsum Mine of china natural resources to produce the brand new technical developing direction of swelling agent for major ingredient.
Description of drawings
Fig. 1: gypsum prepares producing sulfuric acid and jointly expansive clinker, swelling agent process flow diagram.
Embodiment
Through instance the present invention is specifically described below; Be necessary to be pointed out that at this; Following instance only is used for the present invention is further specified; Can not be interpreted as the restriction to protection domain of the present invention, the person skilled in the art in this field can make some nonessential improvement and adjustment to the present invention according to the foregoing invention content.
Embodiment 1
A kind of technology of gypsum system producing sulfuric acid and jointly cement expansive material: the outfit of raw material, raw material adopt the cleaned coal calcining in rotary kiln; Calcining gained sulfur dioxide gas prepares sulfuric acid; The cleaned coal calcining obtains SCEA quicklime grog to the continuation of gained quicklime in rotary kiln, grinding makes cement expansive material, all in weight percentage.
1. the technical analysis of the main chemical of raw material and ash and cleaned coal and coke
The main chemical of table 1-1 raw material and ash
The technical analysis of table 1-2. cleaned coal and coke
2. raw-meal ingredient and raw material Chemical Composition
Table 1-3. raw-meal ingredient
| Gypsum | Iron powder | Coke | |
| Proportioning (%) | 92.54 | 1.41 | 6.05 |
The main chemical of table 1-4. raw material and grog
| LOSS | SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | SO 3 | Ｃ | C/S | SUM | |
| Raw material (%) | 4.25 | 3.29 | 1.06 | 1.51 | 35.57 | 1.94 | 46.67 | 4.75 | 0.68 | 99.03 |
3. the Chemical Composition of expansive clinker and mineral composition
The main chemical of table 1-5. expansive clinker
| LOSS | SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | SO 3 | S | SUM | |
| Expansive clinker (%) | / | 8.47 | 2.88 | 3.53 | 78.51 | 4.33 | 1.31 | 0.31 | 99.02 |
The mineral composition of table 1-6. expansive clinker
Embodiment 2
A kind of technology of gypsum system producing sulfuric acid and jointly cement expansive material: the outfit of raw material, raw material adopt the cleaned coal calcining in rotary kiln; Calcining gained sulfur dioxide gas prepares sulfuric acid; The cleaned coal calcining obtains SCEA quicklime grog to the continuation of gained quicklime in rotary kiln, grinding makes cement expansive material, all in weight percentage.
1. the technical analysis of the main chemical of raw material and ash and cleaned coal and coke
The main chemical of table 2-1. raw material and ash
The technical analysis of table 2-2. cleaned coal and coke
2. raw-meal ingredient and raw material Chemical Composition
Table 2-3. raw-meal ingredient
| Gypsum | Iron powder | Coke | |
| Proportioning (%) | 93.54 | 1.04 | 5.42 |
The main chemical of table 2-4. raw material and grog
| LOSS | SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | SO 3 | Ｃ | C/S | SUM | |
| Raw material (%) | 18.47 | 1.85 | 0.85 | 0.92 | 29.90 | 0.98 | 41.40 | 4.21 | 0.68 | 98.57 |
3. the Chemical Composition of expansive clinker and mineral composition
The main chemical of table 2-5. expansive clinker
| LOSS | SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | SO 3 | S | SUM | |
| Expansive clinker (%) | / | 8.47 | 2.88 | 3.53 | 78.51 | 2.71 | 1.31 | 0.31 | 99.02 |
The mineral composition of table 2-6. expansive clinker
Embodiment 3
A kind of technology of gypsum system producing sulfuric acid and jointly cement expansive material: the outfit of raw material, raw material adopt the cleaned coal calcining in rotary kiln; Calcining gained sulfur dioxide gas prepares sulfuric acid; The cleaned coal calcining obtains SCEA quicklime grog to the continuation of gained quicklime in rotary kiln, grinding makes cement expansive material, all in weight percentage.
1. the technical analysis of the main chemical of raw material and ash and cleaned coal and coke
The main chemical of table 3-1. raw material and ash
The technical analysis of table 3-2. cleaned coal and coke
2. raw-meal ingredient and raw material Chemical Composition
Table 3-3. raw-meal ingredient
| Gypsum | Iron powder | Coke | |
| Proportioning (%) | 93.11 | 1.42 | 5.47 |
The main chemical of table 3-4. raw material and grog
| LOSS | SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | SO 3 | Ｃ | C/S | SUM | |
| Raw material (%) | 18.18 | 1.42 | 0.59 | 0.86 | 31.28 | 1.04 | 41.42 | 4.21 | 0.68 | 99.00 |
3. the Chemical Composition of expansive clinker and mineral composition
The main chemical of table 3-5. expansive clinker
| LOSS | SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | SO 3 | S | SUM | |
| Expansive clinker (%) | / | 5.06 | 2.12 | 2.52 | 84.60 | 2.85 | 1.31 | 0.31 | 98.77 |
The mineral composition of table 3-6. expansive clinker
Embodiment 4
A kind of technology of gypsum system producing sulfuric acid and jointly cement expansive material: the outfit of raw material, raw material adopt the cleaned coal calcining in rotary kiln; Calcining gained sulfur dioxide gas prepares sulfuric acid; The cleaned coal calcining obtains SCEA quicklime grog to the continuation of gained quicklime in rotary kiln, grinding makes cement expansive material, all in weight percentage.
1. the technical analysis of the main chemical of raw material and ash and cleaned coal and coke
The main chemical of table 4-1. raw material and ash
The technical analysis of table 4-2. cleaned coal and coke
2. raw-meal ingredient and raw material Chemical Composition
Table 4-3. raw-meal ingredient
| Gypsum | Iron powder | Coke | |
| Proportioning (%) | 93.09 | 1.51 | 5.40 |
The main chemical of table 4-4. raw material and grog
| LOSS | SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | SO 3 | Ｃ | C/S | SUM | |
| Raw material (%) | 12.37 | 2.81 | 1.29 | 1.09 | 34.79 | 0.38 | 41.26 | 4.20 | 0.68 | 98.18 |
3. the Chemical Composition of expansive clinker and mineral composition
The main chemical of table 4-5. expansive clinker
| LOSS | SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | SO 3 | S | SUM | |
| Expansive clinker (%) | / | 7.73 | 3.52 | 2.73 | 80.73 | 0.93 | 1.31 | 0.31 | 97.26 |
The mineral composition of table 4-6. expansive clinker
Embodiment 5
A kind of technology of gypsum system producing sulfuric acid and jointly cement expansive material: the outfit of raw material, raw material adopt the cleaned coal calcining in rotary kiln; Calcining gained sulfur dioxide gas prepares sulfuric acid; The cleaned coal calcining obtains SCEA quicklime grog to the continuation of gained quicklime in rotary kiln, grinding makes cement expansive material, all in weight percentage.
1. the technical analysis of the main chemical of raw material and ash and cleaned coal and coke
The main chemical of table 5-1. raw material and ash
The technical analysis of table 5-2. cleaned coal and coke
2. raw-meal ingredient and raw material Chemical Composition
Table 5-3. raw-meal ingredient
| Gypsum | Iron powder | Coke | |
| Proportioning (%) | 93.37 | 1.33 | 5.30 |
The main chemical of table 5-4. raw material and grog
| LOSS | SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | SO 3 | Ｃ | C/S | SUM | |
| Raw material (%) | 12.37 | 2.81 | 1.29 | 1.09 | 34.79 | 0.38 | 41.26 | 4.20 | 0.68 | 98.18 |
3. the Chemical Composition of expansive clinker and mineral composition
The main chemical of table 5-5. expansive clinker
| LOSS | SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | SO 3 | S | SUM | |
| Expansive clinker (%) | / | 13.75 | 2.74 | 2.77 | 75.72 | 1.34 | 1.31 | 0.31 | 97.93 |
The mineral composition of table 5-6. expansive clinker
Embodiment 6
A kind of technology of gypsum system producing sulfuric acid and jointly cement expansive material: the outfit of raw material, raw material adopt the cleaned coal calcining in rotary kiln, and calcining gained sulfur dioxide gas prepares sulfuric acid, and gained quicklime continuation cleaned coal calcining in rotary kiln obtains SCEA quicklime grog.Processing of SCEA swelling agent:
With the independent grinding of SCEA expansive clinker, or with SCEA expansive clinker and the common grinding of anhydrite, or all can be made into qualified swelling agent with the common grinding of SCEA expansive clinker, anhydrite and slag.Below be proportioning and the physicals that adopts the swelling agent of the SCEA expansive clinker preparation among the embodiment 1.
Table 6-1. swelling agent proportioning
Table 6-2. swelling agent physicals
Claims (9)
1. an expansive clinker is characterized in that, it is composed of the following components, all in weight percentage: f-CaO:30%～70%, C
3S:15%～40%, C
4AF:6%～12%, f-CaSO
4: 1～8%, C
3A:1%～3%, CaS:0.5～2%, MgO:0.5～5%.
2. swelling agent; It is characterized in that; It is made behind grinding by expansive clinker; Perhaps behind grinding, make, perhaps behind grinding, make by 30%～50% expansive clinker, 20%～30% anhydrite and 20%～40% blast-furnace slag by 30%～70% expansive clinker and 30%～70% anhydrite; Said expansive clinker is by f-CaO:30%～70%, C
3S:15%～40%, C
4AF:6%～12%, f-CaSO
4: 1～8%, C
3A:1%～3%, CaS:0.5～2%, MgO:0.5～5% is formed; Below all in weight percentage.
3. swelling agent as claimed in claim 2 is characterized in that: it is 250～350m that said expansive clinker or expansive clinker and anhydrite or expansive clinker and anhydrite and ground granulated blast furnace slag are milled to specific surface area
2/ kg obtains swelling agent, further is preferably grinding to specific surface area 250～350m
2/ kg.
4. like the preparation method of claim 2 or 3 said swelling agents, it is characterized in that: said preparation method makes cement expansive material through grinding again for outfit, the raw material of raw material adopt the cleaned coal calcining to obtain expansive clinker in rotary kiln; Said raw material are gypsum: 88%～95%, coke 4%～8%, iron powder 1%～4%, Fe in the said iron powder
2O
3>=60%, said coke is the coke of fixed carbon content>=70%, volatile matter≤5%, SO in the said gypsum
3>=38%, all in weight percentage.
5. like the preparation method of the said swelling agent of claim 4, it is characterized in that: the carbon sulphur mol ratio in the said raw material is controlled at 0.6～0.72:1.
6. like the preparation method of claim 4 or 5 said swelling agents, it is characterized in that: the cleaned coal that adopts in the said rotary kiln is for containing ash≤20%, volatile matter>=22%.
7. like the preparation method of claim 4,5 or 6 said swelling agents, it is characterized in that: described gypsum, coke and iron powder raw material combined grinding to granularity tail over 8～16%, by weight percentage for the 0.08mm square hole sieve.
8. the preparation method of expansive clinker according to claim 1, it is characterized in that: said preparation method makes the concrete expansive clinker for outfit, the raw material of raw material adopt cleaned coal to calcine in rotary kiln; Said raw material are gypsum: 88%～95%, coke 4%～8%, iron powder 1%～4%, Fe in the said iron powder
2O
3>=60%, said coke is the coke of fixed carbon content>=70%, volatile matter≤5%, SO in the said gypsum
3>=38%, all in weight percentage.
9. like the preparation method of the said expansive clinker of claim 8, it is characterized in that: the carbon sulphur mol ratio in the said raw material is controlled at 0.6～0.72:1; The gypsum that adopts in the said raw material is SO
3>=45% anhydrite is in weight percentage; The cleaned coal that adopts in the said rotary kiln is for containing ash≤20%, volatile matter>=22%; Said gypsum, coke and iron powder raw material combined grinding to granularity tail over 8～16%, by weight percentage for the 0.08mm square hole sieve.
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