CN108821739B

CN108821739B - Inorganic mixture

Info

Publication number: CN108821739B
Application number: CN201810674874.3A
Authority: CN
Inventors: 池帅; 马刚平; 梁勇; 刘慧慧; 杨婷婷; 孙丽蕊; 柳静; 孙嵬
Original assignee: Shougang Environmental Industry Co ltd
Current assignee: Shougang Environmental Industry Co ltd
Priority date: 2018-06-27
Filing date: 2018-06-27
Publication date: 2022-09-06
Anticipated expiration: 2038-06-27
Also published as: CN108821739A

Abstract

The invention belongs to the technical field of resource environment, and particularly relates to an inorganic mixture which comprises a first substance, a second substance and a third substance, wherein the mass ratio of the first substance is 3-8%, the mass ratio of the second substance is 8-18%, the mass ratio of the third substance is 75-85%, the first substance is formed by mixing a dispersing agent and carbide slag, the second substance is fly ash, and the third substance is graded aggregate. According to the invention, the carbide slag completely replaces lime, is modified by the dispersant, and is reasonably proportioned to ensure the performance of the inorganic mixture after the modified carbide slag is doped, so that the industrial waste carbide slag can be utilized to the preparation of the inorganic mixture in the construction of the road base layer and the subbase layer, and the preparation method has good economic benefits, solves the problems of environment pollution and the like of the carbide slag, and has important social, environmental and economic significances of circular economy, environmental protection and the like.

Description

Inorganic mixture

Technical Field

The invention belongs to the technical field of resource environment, and particularly relates to an inorganic mixture.

Background

The carbide slag is an industrial waste produced in the industrial production of acetylene gas, has low effective utilization rate, is accumulated year by year to cause mass stockpiling, not only occupies valuable land resources, but also is extremely easy to cause secondary pollution to air, surface water and underground water. Therefore, how to utilize the carbide slag as resources to fully utilize the resources and eliminate the environmental pollution source also becomes a problem which is more concerned by technical researchers.

In the course of implementing the present invention, the applicant has found that at least the following problems exist in the prior art:

in the prior art, the method for treating and utilizing the carbide slag mainly comprises the steps of producing building material products such as cement, building blocks and the like by using the carbide slag, wherein the carbide slag needs to be fully dried, although the production process is simple, agglomeration and hardening among the carbide slag particles are easily caused, the requirement on the particle size required by production cannot be met, secondary treatment such as crushing, grinding and the like needs to be carried out on the carbide slag, a large amount of economy and energy are consumed in the secondary treatment link, the consumption of the carbide slag is relatively small due to the fact that the usage amount of the building block products in urban construction is relatively small, economic benefits are low, a large-scale and normal resource utilization mode is not formed, and the problems of application condition, environment pollution and the like of the carbide slag in the urban large quantity of building material products are not effectively improved.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides an inorganic mixture which can recycle waste carbide slag resources and can simultaneously solve the problem of environment pollution caused by the carbide slag.

The invention achieves the above purpose through the following technical scheme:

an inorganic mixture comprises a first substance, a second substance and a third substance, wherein the mass ratio of the first substance is 3% -8%, the mass ratio of the second substance is 8% -18%, the mass ratio of the third substance is 75% -85%, the first substance is formed by mixing a dispersing agent and carbide slag, the second substance is fly ash, and the third substance is graded aggregate.

Preferably, the carbide slag is obtained by hydrolyzing calcium carbide to obtain acetylene gas, and the carbide slag takes calcium hydroxide as a main component.

Further, the effective calcium oxide content of the carbide slag is not less than 55%, and the water content is not more than 60%.

Preferably, in the first substance, the mass ratio of the dispersing agent is 1-2%, and the mass ratio of the carbide slag is 2-6%.

Further, the effective calcium and magnesium content in the dispersant is not less than 65%.

Preferably, the fly ash is a building standard tertiary grade.

Preferably, the graded aggregate is an aggregate according to highway engineering machinery test code JTG E42-2005.

Further, the inorganic mixture also comprises water, and the mass ratio of the water is 7% -13% of the sum of the mass of the first substance, the mass of the second substance and the mass of the third substance.

The beneficial effects of the invention at least comprise:

in the prior art, the main component of the inorganic mixture is lime, the invention completely replaces the lime with the carbide slag, the carbide slag is modified by the dispersant, and the performance of the inorganic mixture after the modified carbide slag is doped is ensured by reasonable proportioning among all substances, so that the industrial waste carbide slag resource can be utilized to the configuration of the inorganic mixture in the construction of a road base layer and a subbase layer, thereby not only having better economic benefit, but also solving the problems of application of the carbide slag in large urban building material products, environmental pollution and the like, and having important social, environmental and economic significance of circular economy, green and environmental protection and the like.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The carbide slag mainly comprises Ca (OH) ₂ Similar to slaked lime, has the potential to be a substitute for slaked lime. The embodiment of the invention is based on the thought, and the carbide slag with low additional value and low economic benefit is treated and utilized to increase the additional value and the economic benefit.

The embodiment of the invention provides an inorganic mixture which mainly comprises a first substance, a second substance and a third substance, wherein the mass ratio of the first substance is 3-8%, the mass ratio of the second substance is 8-18%, and the mass ratio of the third substance is 75-85%.

The first substance of the embodiment of the invention is formed by mixing a dispersing agent and carbide slag. The carbide slag can be waste slag which is obtained by hydrolyzing the carbide to obtain acetylene gas and takes calcium hydroxide as a main component, the water content of the waste slag is usually more than 60%, the fluidity is poor, the viscosity is strong, the property is extremely unstable, the carbide slag can be modified by adding a dispersing agent, so that the effective calcium oxide of the modified carbide slag is not less than 55%, the water content is reduced to be not more than 60%, the carbide slag is dispersed, and the carbide slag has good stability and is convenient to apply.

In the embodiment of the invention, the dispersing agent has high dispersibility, good fluidity during molding and processing and high moisture absorption, and the dispersing agent takes calcium oxide as a main component, and the content of effective calcium and magnesium is more than or equal to 65 percent.

Preferably, in the first substance of the embodiment of the present invention, the mass ratio of the dispersant is 1% to 2%, and the mass ratio of the carbide slag is 2% to 6%, and the dispersant and the carbide slag are mixed and stirred uniformly to obtain the modified carbide slag.

In the embodiment of the invention, the second substance is fly ash.

Preferably, the fly ash can be fine ash captured from flue gas generated after coal combustion, and is a building standard three-grade.

In the embodiment of the invention, the third material is graded aggregate.

Preferably, the graded aggregate is an aggregate according to highway engineering machinery test specification JTG E42-2005, is a granular loose material for preparing concrete and mortar, and mainly plays a role of a skeleton.

Further, in the embodiment of the invention, the inorganic mixture further comprises water, and the mass ratio of the water is 7% -13% of the sum of the mass of the first substance, the mass of the second substance and the mass of the third substance.

In the embodiment of the invention, the carbide slag modified by the dispersant is used, so that the addition amount of 1-3% of water in the inorganic mixture originally prepared from lime can be reduced.

In the prior art, the main component of the inorganic mixture is lime, the invention completely replaces the lime with carbide slag, the carbide slag is modified by a dispersant, and the performance of the inorganic mixture after the modified carbide slag is mixed is ensured by reasonable proportion of all substances, so that the industrial waste carbide slag resource can be utilized to the preparation of the inorganic mixture in the construction of a road base layer and a subbase layer, thereby not only having better economic benefit, but also solving the problems of application of the carbide slag in a large urban building material product, environmental pollution and the like, and having important social, environmental and economic significance of circular economy, green environmental protection and the like.

Firstly, the lime and the carbide slag for preparing the inorganic mixture are respectively subjected to performance tests, and the test results are shown in table 1. Wherein the contents of the effective calcium oxide, the effective calcium oxide and the magnesium oxide are carried out according to road engineering inorganic mixture stable material test regulation JTG E51-2009. The performance test analysis result shows that the contents of the effective calcium oxide, the effective calcium oxide and the magnesium oxide of the carbide slag are slightly lower than those of the lime, but the carbide slag can meet the third-level requirement of the building standard without influencing the normal production and use values.

Name (R)	Effective calcium oxide content	Effective calcium oxide and magnesium oxide content
			Lime (%)	73.21	75.19
Modified carbide slag (%)	72.35	74.07

TABLE 1

And thirdly, testing the performance of the inorganic mixture prepared from the carbide slag and lime respectively, wherein the used lime, fly ash and aggregate meet the requirements of road engineering inorganic mixture stable material test regulation JTJ034-2000, and performing related tests on the inorganic mixture according to road engineering inorganic mixture stable material test regulation JTG E51-2009. Table 2 provides the mix proportions of the various inorganic compounds in the examples of the present invention, table 3 provides the performance comparison test results of the various inorganic compounds in the examples of the present invention, and table 4 provides the strength requirements of the stable material of lime fly ash required by the industrial standard "technical rules for construction of road base course" JTG/T F20-2015.

TABLE 2

TABLE 3

TABLE 4

The performance comparison test results in table 3 and the compressive strength requirements of the inorganic mixture in table 4 show that the inorganic mixture prepared by replacing lime with waste carbide slag can completely prepare the inorganic mixture meeting the use requirements of base courses and subbase courses of urban expressways and main roads, and the unconfined compressive strength of the main performance index of 7 days can meet the requirements of restricted industrial standards. Under the condition that the mixing proportion of the inorganic mixture is basically the same, the inorganic mixture with stable waste carbide slag and fly ash has the same strength or even higher performance than the inorganic mixture with stable lime fly ash, and has good popularization value.

In summary, the technical solutions in the embodiments of the above application have at least the following technical effects or advantages:

according to the embodiment of the invention, the modified carbide slag is used for replacing lime, and the performance of the inorganic mixture doped with the carbide slag can be ensured, so that the waste carbide slag can be utilized, the problems of application of the carbide slag in urban large building material products, environmental pollution and the like are solved, and the inorganic mixture has important social, environmental and economic significance such as circular economy, green environmental protection and the like.

In addition, experiments prove that the strength of the inorganic mixture added with the modified carbide slag in the embodiment of the invention meets the regulations of all road base layers and subbase layers in JTG/T F20-2015, which is the detailed construction technology of road base layers, and the inorganic mixture has strong practicability and simple preparation method.

The above-mentioned embodiments are only for convenience of description of the invention, and are not intended to limit the invention in any way, and those skilled in the art will recognize that the invention can be practiced without departing from the spirit and scope of the invention.

Claims

1. An inorganic mixture suitable for construction of a road base layer and a subbase layer is characterized by comprising a first substance, a second substance, a third substance and water, wherein the mass ratio of the first substance is 3% -8%, the mass ratio of the second substance is 8% -18%, the mass ratio of the third substance is 75% -85%, the mass ratio of the water is 7% -13% of the sum of the mass of the first substance, the mass of the second substance and the mass of the third substance, the first substance is formed by mixing a dispersing agent and carbide slag, the second substance is fly ash, the third substance is graded aggregate, the carbide slag is carbide slag which is obtained by hydrolyzing carbide and takes calcium hydroxide as a main component after acetylene gas is obtained, the effective calcium oxide of the carbide slag is not less than 55%, the water content is not more than 60%, the content of effective calcium and magnesium in the dispersing agent is not less than 65%, the mass ratio of the dispersing agent is 1% -2%, and the mass ratio of the carbide slag is 2% -6%.

2. The inorganic mix according to claim 1, wherein the fly ash is a building standard tertiary grade.

3. The inorganic mix according to claim 1, wherein the graded aggregate is an aggregate according to road engineering test of materials specification JTG E42-2005.