Method for preparing cement mixture from waste phosphorus dregs through wet-milling method

A technology for cement admixture and waste phosphorus slag, which is applied in the field of building materials, can solve the problems of increasing energy consumption, not being placed for too long, damaging equipment, etc., and achieving the effects of low energy consumption, simple operation process and good economy.

Active Publication Date: 2017-04-26
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple in principle and has been widely promoted, but there are also the following problems: the above-mentioned part of industrial solid waste adopts a wet discharge method and open-air stacking, which leads to a large amount of water in the waste, and the traditional grinding process It must be dried to increase energy consumption
[0006] When wet-grinding silicon-aluminum materials and industrial waste, such as slag, the inner wall of the wet-grinding equipment is easy to agglomerate due to its good hydration activity, which can block pipes and damage equipment
Moreover, the prepared slurry admixture should not be placed for too long, because the slag will harden after a long time

Method used

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  • Method for preparing cement mixture from waste phosphorus dregs through wet-milling method

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Experimental program
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Effect test

Embodiment 1

[0037] 1) Waste phosphorus slag, silicon-aluminum industrial waste, and industrial by-product gypsum with stimulating effect are respectively crushed in a crusher. After being crushed to 2-20 mm, they are placed in a ball mill for dry grinding to 1 -2mm;

[0038] 2) After crushing, take 65 parts by mass of phosphorous slag, 10 parts of carbide slag, 15 parts of slag, 7 parts of fly ash, and 3 parts of phosphogypsum, and take 0.5 water according to the water-to-gel mass ratio, and the dosage is Put 0.2% naphthalene-based high-efficiency water reducer into the mixing tank, use an electric mixer to stir, then add phosphorus slag, carbide slag, slag, fly ash, and finally add phosphogypsum, continue stirring, so that It becomes a fluid slurry;

[0039] 3) The slurry in step 2) is evenly stirred and then pumped into a vertical ball mill at a speed of 50 Hz, and wet-milled until d0.5 is below 10 μ to prepare a slurry cement admixture.

[0040] The cement admixture of the present em...

Embodiment 2

[0042] Embodiment 2, with embodiment 1, the difference is,

[0043] 2) Take the pulverized phosphorus slag, 10 parts of calcium carbide slag, 25 parts of slag, 15 parts of phosphorus tailings, and 10 parts of desulfurized gypsum in mass parts, and take 0.6 water according to the water-to-gel mass ratio, and the dosage is Put HSB aliphatic water reducer with 0.1% of the mass of the material into the mixing tank, use an electric mixer to stir, then add phosphorus slag, carbide slag, slag, phosphorus tailings, fly ash, and finally add desulfurization gypsum , continue stirring to make it a fluid slurry;

[0044] Take the slurry cement admixture sample prepared in this example, and use a laser particle size analyzer to detect its particle size, and its d0.5 is below 10 μm.

[0045] The slurry cement admixture prepared in this embodiment is mixed into cement, and its strength is measured by analogy with "Cement Mortar Strength Test Method" (ISO) (GB / 17671-1999), proportioning (cem...

Embodiment 3

[0049] Embodiment 3, with embodiment 1, the difference is,

[0050] 2) After crushing, take 50 parts by mass of phosphorus slag, 5 parts of calcium carbide slag, 20 parts of slag, 5 parts of phosphorus tailings, 10 parts of fly ash, and 10 parts of fluorogypsum, and take 0.6 parts according to the mass ratio of water to glue. The water, the polycarboxylate high-performance water reducing agent with an amount of 0.1% of the material mass is put into the mixing tank, and an electric mixer is used to stir, and then phosphorus slag, calcium carbide slag, slag, phosphorus tailings, powder Stir the coal ash, add fluorine gypsum at the end, and continue stirring to make it a fluid slurry;

[0051] Take the slurry cement admixture sample prepared in this example, and use a laser particle size analyzer to detect its particle size, and its d0.5 is below 10 μm.

[0052] The slurry cement admixture prepared in this embodiment is mixed into cement, and its strength is measured by analogy ...

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Abstract

The invention relates to a method for preparing a cement mixture from waste phosphorus dregs through a wet-milling method. The method comprises the steps of crushing the waste phosphorus dregs, salic industrial wastes and industrial by-product gypsums with an excitation function in a crushing machine to 2 to 20mm, and powder milling in a ball mill through a wet method; feeding 0.5 to 0.6 percent of water and doping 0.1 to 0.2 percent of water reducing agent into a mixing tank, stirring through an electric stirrer, then adding 40 to 65 parts of phosphorus slags and 32 to 50 parts of salic industrial wastes for stirring, finally adding the industrial by-product gypsums with the excitation function for continuously stirring, and obtaining a liquid slurry; and pumping into the vertical ball mill, wet-milling to below 10 mum, and preparing the slurry cement mixture. According to the method for preparing the cement mixture from the waste phosphorus dregs through the wet-milling method provided by the invention, the phosphorus dregs, the salic materials and the industrial wastes are adopted as raw materials, and the water reducing agent is added for wet-milling, so that the materials are activated without doping an exciting agent; and the method is simple in operation process, has no need to dry solid wastes, and is energy-saving and environmental-friendly, and good in economic efficiency.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a method for preparing cement admixture by the wet grinding method of waste phosphorus slag. Background technique [0002] In industrial production, when using an electric furnace to produce yellow phosphorus, the molten material mainly composed of calcium silicate is discharged, and the product after quenching is granulated electric furnace phosphorus slag (referred to as phosphorus slag). .Phosphorus slag is mainly in glass state, the glass body content is more than 85%, the chemical composition is similar to slag, mainly CaO and SiO 2 Mainly, but Al 2 o 3 Low content, with a certain potential hydraulic hardness. However, due to the P in phosphorus slag 2 o 5 Due to the influence of harmful components such as phosphorus slag, the setting speed of phosphorus slag Portland cement is too slow, and the early strength is low, which seriously restricts the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/00C04B24/08C04B24/24C04B18/04
CPCY02W30/91C04B40/0046C04B18/0481C04B18/141C04B18/08C04B18/0445C04B24/00C04B20/026C04B18/12C04B24/08C04B24/24
Inventor 贺行洋郑正旗孙艺恒代飞叶青兰蒙王庭苇刘雨轩卢敏苏英王迎斌李颜娟
Owner HUBEI UNIV OF TECH
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