High iron aluminate-belite-sulfoaluminate cement clinker and preparation method thereof

A technology of sulfoaluminate cement and aluminate, applied in cement production and other directions, can solve the problem of low mechanical properties, and achieve the effects of improving service performance, facilitating resource treatment, and reducing content

Active Publication Date: 2018-02-23
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention still does not get rid of the traditional mineral matching principle of sulphoaluminate cement, resulting in its low mechanical properties

Method used

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  • High iron aluminate-belite-sulfoaluminate cement clinker and preparation method thereof
  • High iron aluminate-belite-sulfoaluminate cement clinker and preparation method thereof
  • High iron aluminate-belite-sulfoaluminate cement clinker and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The clinker mineral composition design and raw material ratio of this embodiment are shown in Table 2, wherein the percentages are mass percentages.

[0057] Table 2: Mineral composition design and raw material ratio table of embodiment 1

[0058]

[0059] The specific steps are:

[0060] (1) Dry limestone, steel slag, desulfurized gypsum, and bauxite at 105°C for 2 hours, crush and grind them separately to below 200 mesh, and continue grinding if the fineness does not meet the requirements;

[0061] (2) The raw materials obtained in step (1) are weighed and proportioned according to the proportioning in Table 2, put into a mixing tank, and mix in a mixer for 20 minutes to obtain raw meal; add 10% water of raw meal quality and mix Mix evenly, and use a press to press the sample;

[0062] (3) Dry the pressed test block in step (2) at 105°C for 6 hours; then place the dried test block in a 950°C muffle furnace for calcination for 30 minutes, and then immediately tran...

Embodiment 2

[0068] The clinker mineral composition design and raw material ratio of this embodiment are shown in Table 4, wherein the percentages are mass percentages.

[0069] Table 4: Mineral composition design and raw material ratio table of embodiment 2

[0070]

[0071] The specific steps are:

[0072] (1) Dry limestone, steel slag, desulfurized gypsum, and bauxite at 105°C for 2 hours, crush and grind them separately to below 200 mesh, and continue grinding if the fineness does not meet the requirements;

[0073] (2) The raw materials obtained in step (1) are weighed and batched according to the proportioning in Table 4, put into a mixing tank, and mix in a mixer for 20 minutes to obtain raw meal; add 10% water of raw meal quality and mix Mix evenly, and use a press to press the sample;

[0074] (3) Dry the pressed test block in step (2) at 105°C for 4 hours; then place the dried test block in a 950°C muffle furnace for calcination for 30 minutes, and then immediately transfer ...

Embodiment 3

[0080] In this embodiment, the clinker mineral composition design and raw material ratio are shown in Table 6, wherein the percentages are mass percentages.

[0081] Table 6: Mineral composition design and raw material ratio table of embodiment 3

[0082]

[0083] The specific steps are:

[0084] (1) Dry limestone, fly ash, desulfurized gypsum, and steel slag at 105°C for 2 hours, crush and grind them separately to below 200 mesh, and continue grinding if the fineness does not meet the requirements;

[0085] (2) The raw materials obtained in step (1) are weighed and proportioned according to the proportioning in Table 6, put into a mixing tank, and mixed in a mixer for 20 minutes to obtain raw meal; add 10% water of raw meal quality and mix Mix evenly, and use a press to press the sample;

[0086] (3) Dry the compressed test block in step (2) at 105°C for 6 hours; then place the dried test block in a muffle furnace at 950°C for 30 minutes, and then immediately transfer it...

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Abstract

The invention discloses a high iron aluminate-belite-sulfoaluminate cement clinker and a preparation method thereof. The high iron aluminate-belite-sulfoaluminate cement clinker comprises the following components in percentages by mass: 25 to 35% of C4A3S<->, 32 to 42% of C2S, 10% to 30% of C4AF and 15 to 25% of f-CaSO4; and besides, the cement clinker also comprises CT. The invention also discloses a preparation method for the cement clinker. The preparation method comprises the following steps: respectively subjecting a calcareous raw material, a salic raw material, a ferruginous raw material and a gypsum component to drying, crushing and grinding, and carrying out weighing and mixing in proportion, adding a certain amount of water and carrying out uniform mixing, carrying out press molding so as to obtain sample blocks, then carrying out calcination at 950 DEG C for 30 min, then immediately transferring the calcined sample blocks into a high-temperature furnace with a temperature of1275 DEG C to 1350 DEG C, continuing calcination for 30 to 60 min, and carrying out air-blast cooling so as to obtain the clinker. The preparation method provided by the invention gets rid of the modulus limit of traditional sulfoaluminate cement, and improves the content of free gypsum on the basis of high iron aluminate and high belite; and the clinker prepared by using the preparation method provided by the invention has mechanical properties capable of meeting requirements of sulfoaluminate cement 525, and has good wear resistance.

Description

field of invention [0001] The invention belongs to the field of building materials and relates to a CaO-SiO 2 -Al 2 o 3 -Fe 2 o 3 -SO 3 Mineral design and preparation method of high-iron high-silicon sulfoaluminate cement clinker fired by multi-component system. Background technique [0002] Sulphoaluminate cement is called the third series of cement in my country except Portland cement and aluminate cement. C 2 S is a cementitious material mainly composed of minerals. It has excellent properties such as early strength, high strength, frost resistance, impermeability and corrosion resistance. It is widely used in construction projects, cement products, and emergency repair projects. [0003] Belite sulphoaluminate cement is based on the mineral composition of ordinary sulphoaluminate cement, and the C 2 A new type of cement formed by S content. At present, according to the oxide composition of Belite sulphoaluminate cement clinker, Al 2 o 3 accounted for about 10...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/32
CPCC04B7/323Y02P40/10
Inventor 兰明章瞿海洋王剑锋崔素萍王亚丽靳耀乐蔡永慧
Owner BEIJING UNIV OF TECH
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