Method for producing low-alkali micro-expansive moderate heat Portland cement from waste aluminum ore

A Portland cement and aluminum ore waste rock technology, applied in cement production, etc., can solve the problems of fluctuations in raw material composition, low expansion rate, and out-of-control shape, and achieve the effects of convenient operation, stable product performance, and simple process

Inactive Publication Date: 2019-07-09
安徽珍珠水泥集团股份有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason is that the hydration rate of periclase is too slow, which fails to achieve the result of synchronizing with cement hydration, resulting in low expansion rate

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

[0016] A method for producing low-alkali micro-expansion medium-heat Portland cement by utilizing aluminum ore waste rock, comprising the following process steps:

[0017] (1) Clinker preparation: take the following components by weight, clinker 78kg, fly ash slag 4kg, agar 2kg, aluminum ore waste rock powder 6kg, desulfurization gypsum 5kg; wherein, the raw material weight ratio of clinker is composed of limestone 85, sandstone 6.5, alumina red mud 4.5, copper slag 0.05;

[0018] (2) Clinker calcination process: control the temperature of the raw materials in step (1) at 850°C in the calciner; the rotary kiln speed is 3.75r / min, the system pulls the wind at -7200Pa, and the clinker is obtained by calcination in the rotary kiln;

[0019] (3) Cement process: the clinker prepared by step (2) is mixed with limestone, aluminum ore waste rock powder and desulfurized gypsum to form clinker by weight; micro-expansion medium heat silicic acid of the present invention is obtained throu...

Embodiment 2

[0022] A method for producing low-alkali micro-expansion medium-heat Portland cement by utilizing aluminum ore waste rock, comprising the following process steps:

[0023] (1) Clinker preparation: take the following components by weight, clinker 83kg, fly ash slag 6kg, agar 3kg, aluminum ore waste rock powder 8kg, desulfurization gypsum 8kg; wherein, the raw material weight ratio of clinker is composed of limestone 88, sandstone 9, alumina red mud 7, copper slag 1;

[0024] (2) Clinker calcination process: control the temperature of the raw materials in step (1) at 880°C in the calciner; the rotary kiln speed is 3.85r / min, the system pulls the wind at -7500Pa, and the clinker is obtained by calcining in the rotary kiln;

[0025] (3) Cement process: the clinker prepared by step (2) is mixed with limestone, aluminum ore waste rock powder and desulfurized gypsum to form clinker by weight; micro-expansion medium heat silicic acid of the present invention is obtained through cement...

Embodiment 3

[0028] A method for producing low-alkali micro-expansion medium-heat Portland cement by utilizing aluminum ore waste rock, comprising the following process steps:

[0029] (1) Clinker preparation: take the following components by weight, clinker 80kg, fly ash slag 5kg, agar 2kg, aluminum ore waste rock powder 7kg, desulfurization gypsum 6kg; wherein, the raw material weight ratio of clinker is composed of limestone 87, sandstone 7, alumina red mud 6, copper slag 0.5;

[0030] (2) Clinker calcination process: control the temperature of the raw materials in step (1) at 880°C in the calciner; the rotary kiln speed is 3.85r / min, the system pulls the wind at -7500Pa, and the clinker is obtained by calcining in the rotary kiln;

[0031] (3) Cement process: the clinker prepared by step (2) is mixed with limestone, aluminum ore waste rock powder and desulfurized gypsum to form clinker by weight; micro-expansion medium heat silicic acid of the present invention is obtained through ceme...

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 a method for producing low-alkali micro-expansive moderate heat Portland cement from waste aluminum ore. The method comprises the following steps: weighing the following components in parts by weight: 78-83 parts of clinker, 4-6 parts of fly ash waste, 2-3 parts of agar, 6-8 parts of waste aluminum ore powder, and 5-8 parts of desulfurized gypsum, wherein the clinker is produced from the following raw materials in percentage by weight: 85-88% of limestone, 6.5-9% of sandstone, 4.5-7% of aluminum oxide red mud, and 0.05-1% of copper slag; controlling the temperature of the raw materials to a range of at 850-880 DEG C in a decomposing furnace; preparing the clinker by calcining in a rotary kiln revolving at a speed of 3.75-3.85 r/min under the condition of system airdischarging from -7200 Pa to -7500 Pa; and mixing the prepared clinker with the clinker composed of the limestone, the waste aluminum ore powder and the desulfurized gypsum in a weight ratio; and forming the mixed clinker into the micro-expansive moderate heat Portland cement disclosed in the present invention by means of a cement grinding mill. The method for producing low-alkali micro-expansivemoderate heat Portland cement from waste aluminum ore has the advantages that the process is simple, and the product is stable in properties with indexes such as linear expansion rate, hydration heatand the like meeting the anticipated demand, and can be widely used in construction of large-size, high-strength buildings, highway tunnels, culverts and the like.

Description

technical field [0001] The invention belongs to the technical field of dry-process cement production, in particular to a method for producing low-alkali micro-expansion medium-heat portland cement by utilizing aluminum ore waste rock. Background technique [0002] At present, the research on the technology with micro-expansion and medium heat characteristics on the basis of ordinary Portland cement is still at a very low stage. In the existing technology, there are: (1) The linear expansion rate cannot reach the target value. The main reason is that the hydration rate of periclase is too slow, which fails to achieve the result of synchronizing with cement hydration, resulting in low expansion rate during water curing; Stable or out of control form, thus affecting the expansion effect. (2) Technical problems such as the heat of hydration not reaching the target value. [0003] From the perspective of comprehensive utilization of resources, it is of great significance to en...

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
IPC IPC(8): C04B7/26C04B7/24C04B7/147C04B7/04C04B7/36
CPCC04B7/04C04B7/147C04B7/24C04B7/26C04B7/36Y02P40/10
Inventor 蒋加凯朱永超周凯
Owner 安徽珍珠水泥集团股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap