Pozzolana mixture as well as preparation method and application thereof

A technology of admixture and volcanic ash, applied in the field of cement admixture, can solve problems such as unguaranteed quality, environmental pollution, increased energy consumption, etc., and achieve the effect of large adjustment space for output

Inactive Publication Date: 2011-10-12
BEICHUAN SIXING CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, some enterprises have adopted the method of firing shale in building earthen kilns to make mixed materials. Although it has solved the demand for some mixed materials to a certain extent, it has increased energy consumption and polluted the environment. The shale is evenly fired The degree and output are not high, and the quality cannot be guaranteed

Method used

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  • Pozzolana mixture as well as preparation method and application thereof
  • Pozzolana mixture as well as preparation method and application thereof
  • Pozzolana mixture as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of pozzolanic mixed material in cement, its preparation method, comprises the following steps, as figure 1 Shown:

[0024] 1) Screening and crushing the shale as raw materials, the mass percentage of water in the shale is 9.8%, and the crushing particle size is 10mm;

[0025] 2) Shale is fed into the bin and measured;

[0026] 3) 30 tons of shale and 200 tons of kiln clinker are alternately covered and roasted at 600°C for 15 minutes to obtain a kiln clinker-burned shale mixture;

[0027] 4) cooling the calcined clinker-burned shale mixture to 60° C. to obtain a pozzolanic mixture.

[0028] 5) The admixture ratio of pozzolanic admixture and other admixtures is 40% (excluding gypsum) when finally producing composite 325 cement; the admixture ratio of pozzolanic admixture is 12% when producing ordinary 425 cement, and Other mixed materials can be added up to 20% (without gypsum).

Embodiment 2

[0030] A kind of pozzolanic mixed material in cement, its preparation method, comprises the following steps:

[0031] 1) Screening and crushing the shale as raw materials, the mass percentage of water in the shale is 9%, and the crushing particle size is 20mm;

[0032] 2) Shale is fed into the bin and measured;

[0033] 3) 40 tons of shale and 200 tons of kiln clinker are alternately covered and roasted at 1000°C for 20 minutes to obtain a kiln clinker-burned shale mixture;

[0034] 4) Cooling the calcined clinker-burned shale mixture to 80°C to obtain a pozzolanic mixture.

[0035] 5) The admixture ratio of pozzolanic admixture and other admixtures is 45% (excluding gypsum) when finally producing composite 325 cement; the admixture ratio of pozzolanic admixture is 15% when producing ordinary 425 cement, and The proportion of other mixed materials can reach 25% (excluding gypsum).

Embodiment 3

[0037] A kind of pozzolanic mixed material in cement, its preparation method, comprises the following steps:

[0038] 1) Screening and crushing the shale as raw materials, the mass percentage of water in the shale is 9.9%, and the crushing particle size is 30mm;

[0039] 2) Shale is fed into the bin and measured;

[0040] 3) 50 tons of shale and 200 tons of kiln clinker are alternately covered and roasted at 800°C for 25 minutes to obtain a kiln clinker-burned shale mixture;

[0041] 4) Cooling the calcined clinker-shale mixture at 70°C to obtain a pozzolanic mixture.

[0042] 5) The admixture ratio of pozzolanic admixture is 42% (excluding gypsum) in the final production of composite 325 cement; the admixture ratio of pozzolanic admixture in the final production of ordinary 425 cement is 18%, and it is mixed with other admixtures The ratio can reach 23% (without gypsum).

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Abstract

The invention discloses a preparation method of a pozzolana mixture. The mixture is prepared by mixing smashed shale with kiln-discharging clinker at a weight part ratio of (3-5):20, roasting and then cooling. The preparation method has the beneficial effects that under the condition that any heat source is not added, crude shale is evenly added to a clinker feeding point of a firing system through simple smashing, weighing and transporting devices; roasting is carried out by utilizing the waste heat of the clinker to prepare the shale mixture, so that the shale mixture completely reaches the characteristic of the pozzolana mixture. The preparation method has the beneficial effects that: a, any environment pollution is not generated; b, energy sources such as coal and the like are not consumed; c, the local shale resources are fully utilized; d, a yield regulation space is large; and e, the price difference of the preparation method in the invention and other methods for preparing the pozzolana shale mixture is at least ***, if being calculated by being based on a cement production line with a 100 Mtpa production capability, 12-18 Mtpa of mixtures can be produced in one year, and the profit is ***-***.

Description

technical field [0001] The invention relates to the field of cement admixtures, in particular to a pozzolanic admixture and a preparation method and application thereof. Background technique [0002] In the cement industry, issues such as shortage, quality and cost of admixtures have long been the old topics that restrict the development of enterprises. In recent years, some enterprises have adopted the method of firing shale in building earthen kilns to make mixed materials. Although it has solved the demand for some mixed materials to a certain extent, it has increased energy consumption and polluted the environment. The shale is evenly fired The degree and output are not high, and the quality cannot be guaranteed. Contents of the invention [0003] The purpose of the present invention is to address the above defects and provide a pozzolanic mixed material, which is prepared by mixing crushed shale and kiln clinker at a weight ratio of 3-5:20, roasting and then cooling....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/36C04B7/43
Inventor 唐协全
Owner BEICHUAN SIXING CEMENT
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