Unlock instant, AI-driven research and patent intelligence for your innovation.

Cement with iron powder sludge replacing iron raw material and preparation method thereof

A sludge and iron technology, applied in the field of cement manufacturing, can solve the problems of high freight price, high harmful components, difficult to handle, etc., achieve good social response, reduce production costs, and achieve the effects of environmental protection

Inactive Publication Date: 2021-05-04
YINAN ZHONGLIAN CEMENT CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Yinan Zhonglian has been using iron raw materials from Lanling County since its establishment and production: iron ore, which has moderate iron content and less harmful components, but due to the long distance of transportation, the freight price is relatively high. In order to reduce production cost, conducted multiple searches around Yinan County, and finally found that there was an iron ore mining enterprise in Yishui County, but it had been shut down for several years. After contacting the local government departments and interviewing local people, it was finally found In the west, we found an abandoned iron ore dressing sludge storage site. The site has a large reserve and is not used by other manufacturers. Through sampling and testing, it is found that its harmful components are high (mainly MgO). Because of this reason, the iron content here Mine sludge has been discarded for many years and has not been used by manufacturers
[0003] However, if the discarded iron ore sludge is no longer used, it will not only pollute the environment, but also is not easy to handle; if the iron ore sludge is used to replace part of the iron ore raw materials to realize the manufacture of cement, it will save a large part of the economic cost. At the same time, It can also reuse "harmful substances" and reduce environmental pollution. Therefore, we have designed a kind of iron powder sludge to replace iron raw material cement and its preparation method

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This embodiment proposes a kind of iron powder sludge instead of iron raw material cement, including the following proportions by weight: 60-68 parts of limestone, 6-10 parts of sandstone, 6-8 parts of carbide slag, and 2-3 parts of iron raw material , 6-12 parts of iron ore sludge, 2-3 parts of filter residue, 2-3 parts of shale; Ca(OH)2 content ≥ 85% in the described calcium carbide slag, SiO2 content 18-28% in the described filter residue, Al2O3 content 35-40%, CaO content 6-10% and impurities.

[0021] This embodiment also proposes a method for preparing iron powder sludge instead of iron raw material cement, comprising the following steps:

[0022] S1, add limestone, sandstone, carbide slag, iron raw materials, iron ore sludge, filter residue, and shale into the mixing equipment in proportion, and mix them evenly through the mixing equipment to obtain the mixed material;

[0023] S2, adding the mixed material in S1 to the grinding equipment, grinding and crushing ...

Embodiment 2

[0028] This embodiment proposes a kind of iron powder sludge to replace iron raw material cement, including the following proportions by weight: 63-65 parts of limestone, 7-9 parts of sandstone, 6.5-7.5 parts of carbide slag, and 2.25-2.75 parts of iron raw material , 8-10 parts of iron ore sludge, 2.25-2.75 parts of filter residue, 2.25-2.75 parts of shale; Ca(OH)2 content in the described calcium carbide slag ≥ 85%, SiO content 18-28% in the described filter residue, Al2O3 content 35-40%, CaO content 6-10% and impurities.

[0029] This embodiment also proposes a method for preparing iron powder sludge instead of iron raw material cement, comprising the following steps:

[0030] S1, add limestone, sandstone, carbide slag, iron raw materials, iron ore sludge, filter residue, and shale into the mixing equipment in proportion, and mix them evenly through the mixing equipment to obtain the mixed material;

[0031] S2, adding the mixed material in S1 to the grinding equipment, gr...

Embodiment 3

[0036] This embodiment proposes a kind of iron powder sludge instead of iron raw material cement, including the following proportions by weight: 63 parts of limestone, 7 parts of sandstone, 6.5 parts of carbide slag, 2.25 parts of iron raw material, 8 parts of iron ore sludge, 2.25 parts of filter residue, 2.25 parts of shale; Ca(OH)2 content ≥ 85% in the calcium carbide slag, SiO2 content 18-28%, Al2O3 content 35-40%, CaO content 6-10% and Impurities.

[0037] This embodiment also proposes a method for preparing iron powder sludge instead of iron raw material cement, comprising the following steps:

[0038] S1, add limestone, sandstone, carbide slag, iron raw materials, iron ore sludge, filter residue, and shale into the mixing equipment in proportion, and mix them evenly through the mixing equipment to obtain the mixed material;

[0039] S2, adding the mixed material in S1 to the grinding equipment, grinding and crushing the mixed material to obtain raw meal powder;

[004...

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

No PUM Login to View More

Abstract

The invention discloses cement with iron powder sludge replacing an iron raw material. The cement is prepared from, by weight, 60-68 parts of limestone, 6-10 parts of sandstone, 6-8 parts of carbide slag, 2-3 parts of the iron raw material, 6-12 parts of iron ore sludge, 2-3 parts of filter residues and 2-3 parts of shale. The invention further provides a preparation method of the cement with the iron powder sludge replacing the iron raw material, and the preparation method comprises the following steps: S1, adding the limestone, the sandstone, the carbide slag, the iron raw material, the iron ore sludge, the filter residues and the shale into mixing equipment in proportion, and uniformly mixing through the mixing equipment to obtain a mixed material. According to the invention, the iron ore sludge is reasonably matched and used, so that the production cost is reduced, considerable economic benefits are created, extra revenue is created for the country, waste utilization is realized, the environment is protected, the social response is good, the win-win situation of economic development and environmental protection is realized, and a good situation of collaborative development of local and enterprises is formed.

Description

technical field [0001] The invention relates to the technical field of cement production, in particular to an iron powder sludge replacing iron raw material cement and a preparation method thereof. Background technique [0002] Yinan Zhonglian has been using iron raw materials from Lanling County since its establishment and production: iron ore, which has moderate iron content and less harmful components, but due to the long distance of transportation, the freight price is relatively high. In order to reduce production cost, conducted multiple searches around Yinan County, and finally found that there was an iron ore mining enterprise in Yishui County, but it had been shut down for several years. After contacting the local government departments and interviewing local people, it was finally found In the west, we found an abandoned iron ore dressing sludge storage site. The site has a large reserve and is not used by other manufacturers. Through sampling and testing, it is fo...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/22C04B7/36C04B7/38
CPCC04B7/24C04B7/22C04B7/36C04B7/38Y02P40/10
Inventor 李丰华王晓东李波波李涛贺海参
Owner YINAN ZHONGLIAN CEMENT CO LTD