Unlock instant, AI-driven research and patent intelligence for your innovation.
Cement clinker prepared from low-grade limestone and preparation method thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A low-grade limestone and cement clinker technology, applied in the field of cement clinker production technology, can solve the problem of large waste residue discharge
Active Publication Date: 2021-05-07
南阳中联水泥有限公司
View PDF2 Cites 4 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0005] The purpose of the present invention is to provide a cement clinker prepared by using low-grade limestone and its preparation method to solve the problem of large discharge of limestone mine waste residue
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0038] A kind of cement clinker prepared by using low-grade limestone, including the following raw materials in percentage: 95% of low-grade high-silica limestone, 1% of sandstone, 2.5% of iron correction material, 1.5% of bauxite, and the CaO content of limestone is between At 41.5%-45%, the low-grade limestone has been homogenized, and the iron calibration materials include sulfuric acidslag, iron ore, and steel slag.
[0039] Elemental analysis results of low-grade limestone after homogenization in Table 1:
[0040] CaO / % SiO 2 / %
MgO / % 44.5％ 13％ 2.43％
[0041] In the cement clinker, Al 2 o 3 The content is 5.1%, Fe 2 o 3 The content is 3.6%, KH=0.89, SM=2.7, IM=1.6.
[0042] The homogenization method of above-mentioned low grade limestone, comprises the steps:
[0043] 1) Loading in the mine: Load the limestone from different mining faces into the truck separately, and use a belt such as figure 1 The loader with the grate grab shown perf...
Embodiment 2
[0066] A kind of cement clinker prepared by using low-grade limestone, including the following raw materials in percentage: 82% low-grade low-silica limestone, 7% sandstone, 5% iron correction material, 6% bauxite, and the CaO content of limestone is between At 41.5%-45%, the low-grade limestone has been homogenized, and the CaO content of the homogenized low-grade limestone is 44.3%, SiO 2 The iron content is 7%, and the MgO content is 1.02%. Among them, the iron calibration materials include sulfuric acid slag, iron ore, and steel slag.
[0067] Table 3 Elemental analysis results of low-grade limestone after homogenization:
[0068] CaO / % SiO 2 / %
MgO / % 44.3％ 7％ 1.02％
[0069] In the cement clinker, Al 2 o 3 The content is 4.9%, Fe 2 o 3 The content is 3.4%, KH=0.92, SM=2.4, IM=1.6.
[0070] The homogenization method of above-mentioned low grade limestone, comprises the steps:
[0071] 1) Loading in the mine: Load the limestone from differe...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The invention provides a cement clinker prepared from low-grade limestone and a preparation method thereof, and relates to the technical field of cement clinker production processes. The cement clinker comprises the following raw materials by weight: 80%-95% of low-grade limestone, 1%-10% of sandstone, 1%-5% of an iron correction material and 1%-8% of bauxite, wherein the CaO content of the limestone is 41.5%-45%; the low-grade limestone is subjected to homogenization treatment, the content of CaO in the homogenized low-grade limestone is not lower than 44.3%, the content of SiO2 is not higher than 13%, and the content of magnesiumoxide is not higher than 3%; the cement clinker takes the low-grade limestone with the CaO content of 41.5-45%, sulfuric-acid slag, iron ore, steel slag, sandstone and bauxite as raw materials, so the limestone with the CaO content of lower than 45% produced by a mine is utilized, and the waste residue discharge amount of the mine is effectively reduced.
Description
technical field [0001] The invention relates to the technical field of cement clinker production technology, in particular to a cement clinker prepared by using low-grade limestone and a preparation method thereof. Background technique [0002] Usually, the CaO content in the limestone used for the production of Portland cement should generally be controlled at about 47%-48%. applications are becoming more and more necessary. [0003] For a long time, limestone mines have become a bottleneck in production due to the constraints of resource conditions. Ore layers and interlayers appear alternately in mines, or ore layers and metamorphic interlayers are mixed together, and the stratification is irregular. The ore quality changes greatly. The high content of crystalline silicon leads to a huge amount of limestone mining and stripping, resulting in a large waste of resources; at the same time, it faces problems such as the waste residue cannot be stored in the open air, occupie...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More 
