A kind of high iron aluminate-belite-sulfoaluminate cement clinker and its preparation method

A technology for sulfoaluminate cement and cement clinker, applied in the direction of cement production, can solve the problem of low mechanical properties, and achieve the effects of improving wear resistance, facilitating resource treatment, and reducing content

Active Publication Date: 2021-10-15
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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  • A kind of high iron aluminate-belite-sulfoaluminate cement clinker and its preparation method
  • A kind of high iron aluminate-belite-sulfoaluminate cement clinker and its preparation method
  • A kind of high iron aluminate-belite-sulfoaluminate cement clinker and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The clinker mineral composition design and raw material ratio of this embodiment are shown in Table 2, wherein the percentages are mass percentages.

[0058] Table 2: Mineral composition design and raw material ratio table of embodiment 1

[0059]

[0060] The specific steps are:

[0061] (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;

[0062] (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;

[0063] (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

[0069] The clinker mineral composition design and raw material ratio of this embodiment are shown in Table 4, wherein the percentages are mass percentages.

[0070] Table 4: Mineral composition design and raw material ratio table of embodiment 2

[0071]

[0072] The specific steps are:

[0073] (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;

[0074] (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;

[0075] (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

[0081] The clinker mineral composition design and raw material ratio of this embodiment are shown in Table 6, wherein the percentages are mass percentages.

[0082] Table 6: Mineral composition design and raw material ratio table of embodiment 3

[0083]

[0084] The specific steps are:

[0085] (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;

[0086] (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;

[0087] (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 tr...

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Abstract

The invention discloses a high iron aluminate-belite-sulfoaluminate cement clinker and a preparation method thereof. By mass percentage, which contains C 2 S: 32-42%, C 4 AF: 10% to 30% and f‑CaSO 4 : 15-25%, in addition to CT. The invention also discloses a method for preparing cement clinker. Calcium raw materials, silicon-aluminum raw materials, iron raw materials and gypsum components are respectively dried, crushed and ground, weighed and mixed according to the calculated ratio, and a certain amount of water is added to mix the clinker. Uniformly, press the test block, calcined at 950°C for 30 minutes, then immediately transferred to a high-temperature furnace at 1275°C to 1350°C to continue calcining for 30 to 60 minutes, and cooled by blast to obtain clinker. The present invention gets rid of the limitation of traditional sulphoaluminate cement rate value, increases the content of free gypsum on the basis of high iron aluminate and high belite, and the mechanical properties of the prepared clinker meet the requirements of 525 sulphoaluminate cement and have relatively high Good wear resistance.

Description

[0001] field of invention [0002] 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 [0003] 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. [0004] 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 a...

Claims

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Application Information

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Patent Type & Authority Patents(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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