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Mine tailing sand brick and preparation method thereof

A technology of tailings sand and sand bricks, which is applied in the field of building bricks, can solve the problems of high production cost and large proportion, and achieve the effects of low cost, simple production process, and high utilization rate of tailings

Inactive Publication Date: 2012-03-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cementitious materials used in the above method are all cement (or add admixture), the ratio of crushed stone / stone / sand is relatively large, and the production cost is relatively high

Method used

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  • Mine tailing sand brick and preparation method thereof
  • Mine tailing sand brick and preparation method thereof
  • Mine tailing sand brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A tailings sand brick is prepared from steel slag, limestone, slag, phosphogypsum, tailings sand and water raw materials. The weight percentage of each raw material is shown in Table 1.

[0023] Table 1: the compressive strength of each raw material proportioning and product (the proportioning in the table is percentage by weight):

[0024]

[0025] The tailings sand is made of phosphorus tailings sand (phosphate rock tailings sand), and the particle size of the phosphorus tailings sand is less than 2mm.

[0026] The results of the 28-day compressive strength of tailings sand bricks are shown in Table 1, and other properties of the product (tailings sand bricks) can also meet the requirements of the JC / T422-2007 "non-sintered waste tailings bricks" standard.

[0027] The preparation method of above-mentioned a kind of tailings sand brick, it comprises the steps:

[0028] 1) Ingredients: select steel slag, limestone, phosphogypsum, slag, tailings sand and water raw m...

Embodiment 2

[0034] A kind of tailings sand brick, which is prepared from steel slag, limestone, slag, phosphogypsum, tailings sand and water raw materials, and the weight percentage is formulated according to the eighth formula (serial number 8) in Example 1, see Table 1 .

[0035] The preparation method is basically the same as in Example 1, and the difference from Example 1 is: the specific surface area of ​​a kind of raw material in steel slag, limestone, and slag raw materials is changed successively in Example 1, and the specific surface area of ​​the remaining two raw materials is kept the same as in Example 1. The specific surface area of ​​raw material changes and the 28-day compressive strength of tailings sand bricks are shown in Table 2. Other properties of the product can also meet the requirements of the JC / T422-2007 "Non-sintered waste tailings bricks" standard.

[0036] Table 2: Comparison of compressive strength of products with different specific surface areas by grinding...

Embodiment 3

[0039]A kind of tailings sand brick, which is prepared from steel slag, limestone, slag, phosphogypsum, tailings sand and water raw materials, and the weight percentage is formulated according to the eighth formula (serial number 8) in Example 1, see Table 1 .

[0040] The preparation method is basically the same as that of Example 1, except that it is different from Example 1 in that: steel slag, limestone, and any two or more (including any two) of slag are mixed and ground, and the composition, specific surface area, and 28% of the tailings sand brick of each mixture are mixed and ground. The results of compressive strength per day are shown in Table 3, and other properties of the product can also meet the requirements of the JC / T 422-2007 "Non-sintered Garbage Tailings Brick" standard.

[0041] Table 3: Comparison of compressive strength of products mixed and ground with some raw materials (unit: MPa)

[0042]

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Abstract

The invention belongs to the building material technical field, particularly relating to a mine tailing sand brick and a preparation method thereof. The mine tailing sand brick is characterized in that the raw materials include steel slag, limestone, scoria, phosphogypsum, mine tailing sand and water; the raw materials are proportioned in the following mass percent: 1-10 percent of steel slag, 1-10 percent of limestone, 10-40 percent of scoria, 5-20 percent of phosphogypsum, 25-70 percent of mine tailing sand, and 9-13 percent of water; the sum of the mass percents of the raw materials is 100percent. The invention has the characteristics of low cost, high strength and high usage of mine tailing.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a building brick prepared by utilizing industrial waste slag and tailing sand. Background technique [0002] Tailings is a by-product of mine resource development, which refers to unutilized solid waste discharged after mining. According to the way the tailings are produced, they can generally be divided into mine tailings and concentrator tailings. Among them, the mine tailings include the associated tailings that have been mined and the low-grade ores that have been removed in the middle; the tailings of the mineral processing plant include the mineral waste that is discharged after a certain process of ore washing. Many researchers often divide tailings into iron tailings, copper tailings, gold tailings, lead-zinc tailings, phosphorous tailings, asbestos tailings, etc. according to the main types of tailings. Since the grinding and sorting process of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B18/12
CPCY02W30/91
Inventor 林宗寿茹晓红
Owner WUHAN UNIV OF TECH
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