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Limestone tailing-bricks and preparation method thereof

A technology for limestone and tailings, which is applied in clay preparation devices, chemical instruments and methods, building components, etc., can solve the problems of serious stockpiling and low utilization rate of limestone tailings, and can solve the problems of land resources, expansion of raw material sources, simple craftsmanship

Inactive Publication Date: 2011-04-13
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the current problems such as low utilization rate of limestone tailings and serious stockpiling, and provide a kind of utilization rate of limestone tailings that can be as high as 95% or more without occupying land resources, so as to realize the manufacture of building bricks with limestone tailings Limestone tailings brick with simple composition and production method and preparation method thereof

Method used

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  • Limestone tailing-bricks and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A limestone tailings brick, its components and weight percentages are: limestone tailings: 92%, sand solidifying agent: 8%.

[0020] Preparation steps:

[0021] 1) The limestone tailings are dehydrated by natural air drying or heat drying, so that the water content of the limestone tailings is 14.5%;

[0022] 2) Continue to take natural air drying or heat drying to carry out dehydration treatment, so that the water content of the limestone tailings is 4.5%;

[0023] 3) Use sieves for sorting, and remove lumps with a particle size of ≥5 mm; limestone tailings with a particle size of ≥5 mm are rolled to a particle size of ≤5 mm before use (the same below);

[0024] 4) Stir and mix with a mixer, and the mud content after mixing is controlled to be 20% of the total weight;

[0025] 5) uniformly mixing 92% limestone tailings with a particle size of ≤5 mm and 8% sand curing agent by weight;

[0026] 6) Add water and stir until uniform, the water content of the mixed raw ma...

Embodiment 2

[0029] A limestone tailings brick has the following components and weight percentages: limestone tailings: 70%, HAS curing agent: 9%, fly ash 21%.

[0030] Preparation steps:

[0031] 1) The limestone tailings are dehydrated by natural air drying or heat drying, so that the water content of the limestone tailings is 12.5%;

[0032] 2) continue to take natural air drying or heat drying for dehydration treatment, so that the water content of the limestone tailings is 3.0%;

[0033] 3) Use a sieve to sort, and remove lumps with a particle size ≥ 5 mm;

[0034] 4) Stir and mix with a mixer, and the mud content after mixing is controlled to be 20% of the total weight;

[0035] 5) uniformly mixing 70% limestone tailings, 9% HAS curing agent and 21% fly ash with a particle size of ≤5 mm;

[0036] 6) Add water and stir until uniform, the water content of the mixed raw materials is 8.0% by weight;

[0037] 7) Carry out brick making and maintenance.

Embodiment 3

[0039] A limestone tailings brick, its components and weight percentages are: limestone tailings: 60.0%, HEC consolidation agent: 10%, sandstone coarse aggregate 30%.

[0040] Preparation steps:

[0041] 1) The limestone tailings are dehydrated by natural air drying or heat drying, so that the water content of the limestone tailings is 12.5%;

[0042] 2) continue to take natural air-drying or heat-drying to carry out dehydration treatment, make the water content of limestone tailings be 3.6%;

[0043] 3) Use a sieve to sort, and remove lumps with a particle size ≥ 5 mm;

[0044] 4) Stir and mix with a mixer, and the mud content after mixing is controlled to be 20% of the total weight;

[0045] 5) uniformly mixing 60% limestone tailings, 10% HEC consolidation agent and 30% sandstone coarse aggregate with a particle size of ≤5 mm;

[0046] 6) Add water and stir until uniform, the water content of the mixed raw materials is 6.5% by weight;

[0047] 7) Carry out brick making a...

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Abstract

The invention relates to limestone tailing-bricks and a preparation method thereof, which solves the problem of the maximization comprehensive utilization of the limestone tailings. The preparation method of the limestone tailing-bricks is as follows: dehydrating the limestone tailings and controlling water content thereof to be less than or equal to 15%; again dehydrating and controlling water content thereof to be less than 5%; clearing lumps with grain size larger than or equal to 5 millimeter; blending and controlling silt content to be 20-50% of the total weight; blending the limestone tailings with grain size less than 5 millimeter, the limestone coarse aggregate or the coal ash, and the firming agent; watering and uniformly stirring; controlling the weight percentage of the blended raw materials thereof to be 6-11%; brick making and maintaining. The invention enlarges the raw material source of the brick making, causes the limestone tailings to be fully used, solves the problem of stockpiling occupying land resources; and the prepared building bricks are in line with the national standard, has simple technique, stable quality control and low production cost.

Description

technical field [0001] The invention relates to a building brick, in particular to a brick made from limestone tailings and a preparation method thereof. Background technique [0002] In the mining process of limestone mines, because the ore contains soil, in order to obtain finished limestone ore with a certain particle size and concentrate grade, it is often necessary to crush, screen, and wash the raw limestone ore. Limestone tailings that account for 5-10% of raw ore output are produced. These tailings are mainly composed of limestone and also contain a certain amount of soil and other components. These tailings can only be piled up in tailings ponds, which not only occupy land resources, but also cause certain harm to the environment. In order to ensure the safe operation of the tailings pond, it is necessary to invest a lot of manpower and material resources to monitor and maintain it. [0003] There are two ways to utilize limestone tailings, one is to increase the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04C1/00B28C5/00C04B28/00C04B28/14C04B18/12
CPCY02W30/91
Inventor 张正文毛静民饶发明高大峰伍朝蓬王姝娟刘捷刘浪
Owner 武钢集团有限公司
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