Waste slurry recycling and reusing technology of concrete mixing station

A mixing plant and concrete technology, which is applied in the field of waste slurry recycling and reuse technology in mixing plants, can solve the problems of increasing the operating cost of the mixing plant, waste of land resources, environmental pollution, etc., so as to solve the waste of land resources, save processing costs, and reduce production. The effect of the process

Inactive Publication Date: 2016-06-08
中建西部建设西南有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a recycling process for waste slurry in the mixing station, which can realize the recycling and reuse of the waste slurry in the mixing station, and solve the waste of land resources, e

Method used

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  • Waste slurry recycling and reusing technology of concrete mixing station

Examples

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Comparison scheme
Effect test

Embodiment 1

[0030] A process for recycling waste slurry from a concrete mixing station, the flow chart of which is shown in figure 1 , including the following steps:

[0031] 1) Pretreatment of waste slurry in the mixing station: In the waste slurry settling tank of the mixing station, a retarder (sodium gluconate) with a mass of 0.08% of the waste slurry is added, through the adsorption of the retarder and the generation of complexes, and Control the solid content of waste slurry to 50%;

[0032] 2) Pre-homogenization of waste slurry in the mixing station: transport the waste slurry treated with retarder from the sedimentation tank to the pre-homogenization tank, add water and stir for 3-5 minutes according to the ratio of water to slurry 1:1, and make a homogeneous waste slurry;

[0033] 3) Filtration and transportation of homogeneous waste slurry: transport the homogeneous waste slurry to the batching mixing tank through the slurry pump, wherein the head end of the slurry pump is prov...

Embodiment 2

[0037] A process for recycling waste slurry from a concrete mixing station, specifically comprising the following steps:

[0038] 1) Pretreatment of waste slurry in the mixing station: In the waste slurry settling tank of the mixing station, a retarder (sucrose) with a mass of 0.09% of the waste slurry is added to control the waste through the adsorption of the retarder and the generation of complexes. The solid content of the slurry is 50%;

[0039] 2) Pre-homogenization of waste slurry in the mixing station: transport the waste slurry treated with retarder from the sedimentation tank to the pre-homogenization tank, add water and stir for 3-5 minutes according to the ratio of water to slurry 1:1, and make a homogeneous waste slurry;

[0040] 3) Filtration and transportation of homogeneous waste slurry: transport the homogeneous waste slurry to the batching mixing tank through the slurry pump, wherein the head end of the slurry pump is provided with a filter screen with a mesh...

Embodiment 3

[0044] A process for recycling waste slurry from a concrete mixing station, specifically comprising the following steps:

[0045] 1) Pretreatment of waste slurry in the mixing station: In the waste slurry settling tank of the mixing station, a retarder (sucrose) with a mass of 0.09% of the waste slurry is added to control the waste through the adsorption of the retarder and the generation of complexes. The solid content of the slurry is 50%;

[0046] 2) Pre-homogenization of waste slurry in the mixing station: transport the waste slurry treated with retarder from the sedimentation tank to the pre-homogenization tank, add water and stir for 3-5 minutes according to the ratio of water to slurry 1:1, and make a homogeneous waste slurry;

[0047] 3) Filtration and transportation of homogeneous waste slurry: transport the homogeneous waste slurry to the batching mixing tank through the slurry pump, wherein the head end of the slurry pump is provided with a filter screen with a mesh...

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Abstract

The invention discloses a waste slurry recycling and reusing technology of a concrete mixing station. The waste slurry recycling and reusing technology of the concrete mixing station comprises the following steps: firstly pre-treating waste slurry of the concrete mixing station, and maintaining the activity of a cementing material in the waste slurry; then conveying the waste slurry from a settling pond to a pre-homogenizing pond, adding water and stirring for carrying out waste slurry pre-homogenization; filtering the obtained homogenous waste slurry through a filter screen, and conveying the homogenous waste slurry to a burdening and stirring tank; metering and stirring cement, a mineral admixture, water, a water reducing agent, an early strength agent and an exciting agent according to a proportion to prepare concrete slurry, conveying the obtained concrete slurry to a foaming machine to prepare foam concrete, pouring the foam concrete in a mold, standing, demoulding, and maintaining, thus obtaining a regenerated foam concrete product with the dry density level of 600 to 800 kg/m<3>. According to the waste slurry recycling and reusing technology disclosed by the invention, the problems of waste of land resources, environment pollution and increment of running cost of the concrete mixing station due to backfilling of the waste slurry of the concrete mixing station can be solved, qualified regenerative products can be generated, and the waste slurry recycling and reusing technology is suitable for being popularized and applied.

Description

technical field [0001] The invention belongs to the technical field of reuse of construction waste, and in particular relates to a recycling process of waste slurry in a mixing station. Background technique [0002] The waste slurry of the ready-mixed concrete mixing plant is the waste generated during the concrete production process. It mainly comes from the cleaning of the site, vehicles, mixers, scrapped concrete, production sampling and waste slurry produced after sand and gravel separation. Its main components are water and fine Solid particles (including cement hydration products, unhydrated cement particles, mineral admixtures, some admixtures and ultra-fine sand, etc.). According to statistics, the production of 1m 3 Concrete will produce about 20kg of waste slurry. For mixing plants, the treatment of production waste is a traditional problem. [0003] At present, the general method of processing waste slurry in ready-mixed concrete mixing plants is that the unhard...

Claims

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Application Information

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IPC IPC(8): C04B18/16C04B20/02C04B28/00C04B38/10
CPCC04B20/023C04B28/006C04B2103/12C04B18/167C04B7/00C04B18/08C04B18/141C04B18/04C04B22/062C04B38/106C04B18/081C04B18/14C04B22/08C04B22/147Y02W30/91
Inventor 卢佳林陈景徐芬莲甘戈金刘永道王晶晶
Owner 中建西部建设西南有限公司
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