Industrial production process of fluid soil

Abstract

The invention discloses an industrial production process of fluid soil. The industrial production process comprises the following steps: (1) pretreatment of muck: adding water into muck and stirring to form slurry with fluidity; (2) slurry preparation: adding water into the slurry, and stirring to adjust the concentration; and (3) feeding and stirring: adding cement and an admixture into the prepared slurry, and stirring and mixing. The process has the beneficial effects that the flow-state soil production process is simplified, the stirring efficiency of the flow-state soil is improved, and the stirring quality of the flow-state soil is improved; the abandoned and transported muck which is high in water content, high in cohesiveness and rich in large particles such as stones and the like in the project is simply and efficiently treated; the applicability is very high; through triple stirring of pretreatment, slurry preparation and the stirring main machine, the uniformity of the fluid soil is ensured, and then the quality of the fluid soil is ensured; through two-stage pretreatment and triple stirring, the stirring continuity is ensured, and the yield of a production line is further ensured; the slurry is decomposed and prepared in advance, so that the concentration of the slurry is ensured; and an automatic weighing system is adopted, so that the feeding accuracy of each raw material is ensured, and the quality of the fluid soil is further ensured.

Description

Technical Field

[0001] The invention relates to the field of fluidized solidified soil (hereinafter referred to as fluidized soil) construction, and in particular to an industrialized production process of fluidized soil. Background Art

[0002] Fluidized soil technology has begun to be used in the treatment of slag and backfilling projects in the construction of municipal engineering and construction projects. Fluidized soil has many advantages, but it has not yet been widely used in China. At present, China's fluidized soil production process is mainly divided into two types according to the source of slag. One is to control the slag source (using silty soil), disperse the slag into fine particles through a pulverizer, and then put the fine particles into a mixer; the other is to pre-screen the slag, remove large particles, and leave fine particles for mixing. Both of the above production processes have great limitations; the nature of the slag to be treated has a great influence on the production process, so the development of a new production process that can treat the abandoned slag in situ to the greatest extent will have a good application prospect.

[0003] For example, in the Pearl River Delta region of China, the abandoned slag has a high moisture content, many particles deposited in the slag, and it is difficult to screen; the above two treatment methods are not applicable; therefore, when applying fluidized soil in the Pearl River Delta region of China, the existing technology encounters difficulties. Summary of the invention

[0004] In view of the deficiencies in the prior art described above, the present invention provides an industrial production process for fluidized soil, which can solve the problems existing in the production of fluidized soil, such as high requirements for the treated slag, cumbersome processing, poor mixing uniformity, long single-disk mixing time, and difficult quality control during continuous production.

[0005] The technical solution adopted by the present invention to solve the technical problem is: an industrial production process of fluidized soil, which includes the following steps:

[0006] (1) Pretreatment of slag: Add water to the slag and stir it to form a fluid slurry;

[0007] (2) Mud preparation: Add water to the mud and stir to adjust the concentration;

[0008] (3) Add materials and mix: Add cement to the prepared mud and mix.

[0009] The slag pretreatment step is to add slag and water in a weight ratio of 1:0.5 into a mud-dissolving tank and stir them to disintegrate large pieces of slag and separate large-size particles to form mud with a fluidity value of 100-160.

[0010] The mud preparation step includes a stirring tank and a water reservoir. The water reservoir adds liquid to the stirring tank through a liquid scale, which is used to accurately add liquid to the stirring tank. The main purpose is to prepare the mud to the required 1.6-1.8g / cm 3 Volume ratio concentration, and store not less than 6m 3 , to ensure the continuity of production. A vibrating screen with a mesh diameter of 5 cm is set above the mixing tank to screen out the large-size particles separated during pretreatment; the mud dissolving tank is connected to the vibrating screen through an excavator; stirring blades are set in the mixing tank, and water is added to the tank according to the mud concentration to ensure the uniformity and concentration requirements of the mud.

[0011] The feeding and mixing includes a mixing main machine, a cement silo and an external admixture silo. The cement silo and the external admixture silo are connected to the mixing main machine, and the mixing tank is connected through a delivery pump and a pumping pipeline. The main purpose is to deliver the prepared mud to the mixing main machine through the delivery pump; the pumping volume is controlled by an electromagnetic flowmeter. At the same time, according to the mixing volume of each plate and the weight ratio of mud: cement = 1:0.1, cement and other external admixtures (different curing agents are added according to different soil characteristics) are weighed and put into the mixer to be mixed with the mud.

[0012] Compared with the prior art, the beneficial effects of the present invention are: simplifying the production process of fluidized soil, improving the mixing efficiency of fluidized soil, and improving the mixing quality of fluidized soil; simply and efficiently treating the abandoned slag of this project with high water content, strong cohesion, and rich in large particles such as stones; having strong applicability; ensuring the uniformity of the fluidized soil through the triple mixing of pretreatment, mud modulation, and mixing main machine, thereby ensuring the quality of the fluidized soil; ensuring the continuity of mixing through two-stage pretreatment and triple mixing, thereby ensuring the output of the production line; ensuring the concentration of the mud by demudging and modulating the mud in advance; and adopting an automatic weighing system to ensure the accuracy of the feeding of each raw material, thereby ensuring the quality of the fluidized soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the process of the industrial production process of fluidized soil of the present invention.

[0014] Figure 2 for photos of the fluidity of the mud;

[0015] Figure 3 These are sample photos of specimens cured under the same conditions for 7 days. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings. The specific embodiments are only representative embodiments of the present invention, and the specific methods, devices, conditions, materials, etc. exemplified therein are not intended to limit the present invention or the corresponding specific embodiments. In addition, the devices in the figures are only used to express their relative positions and are not drawn according to their actual proportions, which should be noted first.

[0017] In the description of this specification, the description with reference to the terms "preferred", "one specific embodiment", "another specific embodiment" or "partial specific embodiment" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments in an appropriate manner.

[0018] An industrial production process of fluidized soil includes the following steps:

[0019] Processing system structure Figure 1 As shown, it includes a slag pretreatment device, a mud modulation device and a feeding and stirring device, the slag pretreatment device includes a mud demulsification tank, the mud modulation device includes a water storage tank and a stirring tank, the water storage tank is connected to the stirring tank through a liquid scale, and a vibrating screen is arranged at the feeding port of the stirring tank; the feeding and stirring device includes a cement silo, an external admixture bin and a stirring main machine, the cement silo and the external admixture bin are respectively connected to the stirring main machine through a powder scale, and a discharge pipe is arranged under the stirring main machine; the mud demulsification tank transports the material to the vibrating screen through an excavator, and the material falls into the stirring tank after being screened by the vibrating screen; the stirring tank is connected to the stirring main machine through a conveying pipe and a conveying pump.

[0020] (1) Before the operation, the mud dissolving tank, mixing main machine, mixing tank and other equipment are arranged on site according to the above system structure, and each equipment is debugged and trial production is carried out. The raw materials are brought in and the quality of the raw materials is tested. After the raw materials are qualified, they are put into the storage warehouse.

[0021] (2) Pretreatment of slag: The slag to be treated is put into a mud-dissolving pool and stirred with water to disintegrate large pieces of slag and separate large-size particles to form a mud with a fluidity value of about 130.

[0022] (3): Mud preparation: The above mud is transported by an excavator and enters the mixing tank through a vibrating screen; the agitator in the mixing tank is started to make the mud flow continuously in the tank; at the same time, the concentration of the mud in the tank is detected, and an appropriate amount of water is added from the water reservoir as needed to adjust the concentration to the designed concentration of 1.7 g / cm3.

[0023] (4): Feeding and mixing: The electromagnetic flowmeter controls the mud pump to send a plate of fluidized soil prepared in the mixing tank into the mixing main unit. At the same time, the cement and other admixtures are weighed according to the mixing volume of each plate of fluidized soil and the proportion, and then fed into the mixing main unit to mix with the mud. The weight ratio of mud to cement is 1:0.1.

[0024] (5): After the mixing meets the requirements, the material is unloaded and the next batch of raw materials is put into the mixing host.

[0025] The above steps are the main steps of the present invention. In actual construction, different proportions need to be tried according to different slags, and more detailed instructions need to be given to different positions. During construction, each position must strictly operate according to the established process.

[0026] After the above process steps, Figure 2 As shown in the figure, the fluidity of the mud can achieve self-leveling. Figure 3 As shown, the compressive strength of the specimens cured under the same conditions is 0.5 to 1 MPa after 7 days.

[0027] The above is only a preferred embodiment of the present invention, and should not be used to limit the scope of the present invention. That is, all simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the invention description are still within the scope of the patent of the present invention.

Claims

1. An industrial production process of fluidized soil, characterized in that: The steps involved are as follows: (1) Pretreatment of slag: Add water to the slag and stir it to form a fluid slurry; (2) Mud preparation: add water to the mud and stir to adjust the concentration; (3) Add materials and mix: Add cement to the prepared mud and mix.

2. The industrial production process of fluidized soil according to claim 1, characterized in that: The slag pretreatment step is to add slag and water in a weight ratio of 1:0.5 into a mud desludging tank and stir, so that large pieces of slag are disintegrated and large-size particles are separated to form mud with a fluidity value of 1 () ()-160.

3. The industrial production process of fluidized soil according to claim 2, characterized in that: The mud preparation step includes a stirring tank and a water reservoir. The water reservoir adds liquid into the stirring tank through a liquid scale. The stirring tank is equipped with a stirring truck to prepare the mud to a concentration of 1.6-1.8g / cm3 and store no less than 6m3.

4. The industrial production process of fluidized soil according to claim 3, characterized in that: A vibrating screen with a mesh diameter of 5 cm is set above the stirring tank to screen out the large-size particles separated during pretreatment.

5. The industrial production process of fluidized soil according to claim 4, characterized in that: The desludging tank is connected to the vibrating screen through an excavator.

6. The industrial production process of fluidized soil according to claim 5, characterized in that: A stirring blade is arranged in the stirring tank.

7. The industrial production process of fluidized soil according to claim 6, characterized in that: The feeding and mixing system comprises a mixing main machine, a cement silo and an external admixture silo. The cement silo and the external admixture silo are connected to the mixing main machine, and the mixing tank is connected via a delivery pump and a pumping pipeline.

8. The industrial production process of fluidized soil according to claim 7, characterized in that: The weight ratio of mud: cement is 1:0.1.

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