Method for preparing natural hydraulic lime from potassium feldspar and limestone

A technology of limestone and potassium feldspar, applied in the field of preparation of natural hydraulic lime

Pending Publication Date: 2021-07-30
白雨鑫
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Yang Jianlin et al. used ginger stone as raw material to calcine at 900°C for 8 hours to prepare hydraulic lime with a composition similar to that of commercial NHL5. There is no report on the preparation of NHL3.5.

Method used

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  • Method for preparing natural hydraulic lime from potassium feldspar and limestone
  • Method for preparing natural hydraulic lime from potassium feldspar and limestone
  • Method for preparing natural hydraulic lime from potassium feldspar and limestone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Please refer to figure 1 , a method for utilizing potassium feldspar and limestone to prepare natural hydraulic lime, comprising the following steps:

[0034] Step S1, adopt wet method mixing, mix potassium feldspar and limestone according to mass ratio 1:3;

[0035] Step S2, preparing the mixture in step S1 into a first sample according to a water-cement ratio of 0.27, specifically, the first sample is a sample of 80×40×10 mm;

[0036] In step S3, the first sample in step S2 is naturally dried at room temperature and then placed in a muffle furnace, and calcined at 950°C;

[0037] Step S4, curing the first sample in step S3.

Embodiment 2

[0039] A method of utilizing potassium feldspar and limestone to prepare natural hydraulic lime, comprising the following steps:

[0040] Step S1, adopt wet method mixing, mix potassium feldspar and limestone according to mass ratio 1:3;

[0041] Step S2, preparing the mixture in step S1 into a first sample according to a water-cement ratio of 0.27, specifically, the first sample is a sample of 80×40×10 mm;

[0042] In step S3, the first sample in step S2 is naturally dried at room temperature and then placed in a muffle furnace, and calcined at 950°C;

[0043] Step S4, curing the first sample in step S3.

[0044] Further, in the step S4, the first sample in the step S3 is uniformly mixed with the quartz sand at a mass ratio of 1:1, the mortar is uniformly mixed at a water-cement ratio of 0.42, the mortar is poured into the mold, and the vibration is formed. , after 24 h demoulding, the second sample made was cured at room temperature.

[0045] Preferably, the particle size...

Embodiment 3

[0049] A method of utilizing potassium feldspar and limestone to prepare natural hydraulic lime, comprising the following steps:

[0050] Step S1, adopt wet method mixing, mix potassium feldspar and limestone according to mass ratio 1:3;

[0051] Step S2, preparing the mixture in step S1 into a first sample according to a water-cement ratio of 0.27, specifically, the first sample is a sample of 80×40×10 mm;

[0052] In step S3, the first sample in step S2 is naturally dried at room temperature and then placed in a muffle furnace, and calcined at 950°C;

[0053] In step S4, the first sample in step S3 is maintained. Specifically, the first sample in step S3 is mixed with quartz sand in a mass ratio of 1:1, and the particle size of the quartz sand is less than 420 μm. The ratio of 0.42, the mortar was mixed evenly, the mortar was poured into the mold, and the vibration was formed. After 24 hours of demoulding, the second sample made was cured at room temperature.

[0054] Prefer...

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Abstract

The invention belongs to the field of preparation of natural hydraulic lime, and discloses a method for preparing natural hydraulic lime from potassium feldspar and limestone. The method comprises the following steps of: step S1, uniformly mixing potassium feldspar and limestone according to a mass ratio of 1: 3 by wet mixing; S2, preparing the mixed material in the step S1 into a first sample according to a water-cement ratio of 0.27; S3, naturally drying the first sample in the step S2 at room temperature, putting the first sample into a muffle furnace, and calcining the first sample at 950 DEG C; and S4, curing the first sample in the step S3. According to the method, the potassium feldspar and limestone are used as raw materials and calcined at 950 DEG C for 6 hours, the content of CaO, 2CaO. SiO2 and 2CaO. Al2O3.SiO2 in a product is similar to that of the components of European hydraulic lime NHL3.5, and the blank about preparation of NHL3.5 hydraulic lime in China is filled.

Description

technical field [0001] The invention relates to the technical field of preparation of natural hydraulic lime, in particular to a method for preparing natural hydraulic lime by utilizing potassium feldspar and limestone. Background technique [0002] Natural hydraulic lime is a cementitious material obtained by calcining siliceous limestone with high clay content or high silica content. The calcination temperature of natural hydraulic lime is 950℃~1250℃. A material with both hydraulic and gas hardness. Its hydraulic properties depend on C 2 S, gas hardness depends on Ca(OH) 2 At present, some scholars have applied hydraulic lime to the restoration and reinforcement of ancient buildings. [0003] Potassium feldspar is a silicate mineral widely distributed and stored in my country. The research on potassium feldspar in my country mainly focuses on the preparation of potash fertilizer with potassium feldspar as raw material and the adsorption study with potassium feldspar. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/34
CPCC04B7/34
Inventor 白雨鑫
Owner 白雨鑫
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