A steam-cured brick produced from phosphorus tailings and phosphorus slag and its preparation method

A technology of phosphorus tailings and steam-cured bricks, which is applied in the field of building material preparation, can solve the problems of insufficient utilization of phosphorus tailings, increased investment in waterproofing projects, and poor water resistance of unburned bricks, so as to save transportation costs and low production costs , the effect of complete appearance

Inactive Publication Date: 2015-12-02
WUHAN INSTITUTE OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Phosphorus tailings and phosphorus slag belong to the waste residues produced after the utilization of phosphate rock resources. Many phosphorus chemical enterprises have these two kinds of industrial waste residues at the same time. There is no method to utilize finer phosphorous tailings in large quantities
[0009] In addition, the water resistance of unburned bricks prepared by the existing technology is poor, especially when the doping amount of barren waste is high, which limits its application and may increase the investment in waterproofing projects

Method used

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  • A steam-cured brick produced from phosphorus tailings and phosphorus slag and its preparation method
  • A steam-cured brick produced from phosphorus tailings and phosphorus slag and its preparation method
  • A steam-cured brick produced from phosphorus tailings and phosphorus slag and its preparation method

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Embodiment 1～92

[0036] In Examples 1 to 24, a steam-cured brick produced by using phosphorus tailings and phosphorus slag has a mass ratio of barren base material to cementitious material of 8:2, and the distribution ratio of each component is shown in Table 1 below.

[0037] Table 1

[0038]

[0039]

[0040] In Examples 1-24, the steps of preparing the above steam-cured bricks:

[0041] (1) Weigh the sterile base material, gelling material, activator and water according to the ratio of the components in Table 1;

[0042](2) Pour the barren base material, gelling material and activator weighed in step (1) into the mixer and dry mix them evenly (stir for 3 to 10 minutes), then add the weighed water and mix them wet, stir After uniformity (stirring for 3-10 minutes), age the obtained material for 24 hours;

[0043] (3) Pour the aged material in step (2) into the mold for stamping and forming, the forming pressure is 25MPa, demould immediately after forming, and obtain the adobe;

[00...

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Abstract

The invention belongs to the field of the preparation technology of building materials, and particularly relates to a steam-cured brick produced by use of phosphate tailing and phosphorus slag and a preparation method thereof. The steam-cured brick provided by the invention consists of a barren base material, a cementing material, an activator and water, wherein the barren base material consists of phosphate tailing and sand; the cementing material consists of phosphorus slag and a calcium raw material; the mass ratio of the barren base material to the cementing material is (8:2)-(5:5); the mass of the activator accounts for 2-5% of the mass of the phosphorus slag in the cementing material; the mass of the water accounts for 10-40% of the mass of the cementing material. The steam-cured brick provided by the invention has high compressive strength, good durability, standard size and complete shape, and can meet the requirements of the current national standard JC / T422-2007 Non-Fired Rubbish Gangue Brick; moreover, the preparation method is simple in process, mild in conditions and easy to realize.

Description

technical field [0001] The invention belongs to the technical field of building material preparation, and in particular relates to a steam-cured brick produced by utilizing phosphorus tailings and phosphorus slag and a preparation method thereof. Background technique [0002] With the mining and utilization of phosphate rock, phosphate rock resources are becoming increasingly depleted. It has been listed by the Ministry of Land and Resources as one of the 20 types of minerals that cannot meet the needs of national economic development after 2010, and has been listed as a non-renewable strategic resource. my country is rich in phosphate rock resources, but 80% of them are medium and low-grade phosphate rock, most of which are collophosite with high impurity content and difficult to separate. In order to meet the production needs of phosphoric acid and high-concentration phosphorus compound fertilizer, a large amount of tailings are generated. [0003] Most of the ores mined f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/34
Inventor 曹宏薛俊梁兴荣王其林石小勇李先福赖小莹张晖
Owner WUHAN INSTITUTE OF TECHNOLOGY
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