阅读说明：本技术 一种加气混凝土废料综合利用方法及系统 (Comprehensive utilization method and system for aerated concrete waste ) 是由 张国标 安玉坤 俞斌荣 刘吉 于 2019-09-30 设计创作，主要内容包括：本发明涉及一种加气混凝土废料综合利用方法及系统,其特征在于：加气混凝土废料综合利用系统包括双轴金属破碎机、环锤欧版破碎机、过渡仓和浇筑搅拌机；通过双轴金属破碎机以及环锤欧版破碎机对废料进行破碎,使废料直径为0.2～1mm；破碎的废料通过气力输送机将废料输送到浇筑楼的过渡仓内暂存；在下次加气混凝土板材或砌块生产过程中,将废料作为骨料掺入由砂、粉煤灰、含硅尾矿、石灰、水泥、发气剂和水组成的加气混凝土混合料中,并在浇筑搅拌机内搅拌,废料的质量为加气混凝土混合料质量的3％～8％。本发明能够处理掉加气混凝土废料,减少废料占地面积及污染；废料作为骨料掺入后续生产用的混凝土中,减少石灰和水泥的用量；废料处理能耗低,节约成本。(The invention relates to a comprehensive utilization method and a system for aerated concrete waste, which are characterized in that: the comprehensive aerated concrete waste utilization system comprises a double-shaft metal crusher, a ring hammer European-edition crusher, a transition bin and a pouring mixer; crushing the waste material by a double-shaft metal crusher and a ring hammer European plate crusher to enable the diameter of the waste material to be 0.2-1 mm; conveying the crushed waste materials into a transition bin of a pouring building for temporary storage through a pneumatic conveyor; in the next production process of the aerated concrete plate or building block, the waste is used as aggregate to be mixed into an aerated concrete mixture consisting of sand, fly ash, siliceous tailings, lime, cement, a gas former and water, and the mixture is stirred in a pouring stirrer, wherein the mass of the waste is 3-8% of that of the aerated concrete mixture. The invention can treat the aerated concrete waste, reduce the occupied area of the waste and reduce pollution; the waste material is used as aggregate to be doped into concrete for subsequent production, so that the use amount of lime and cement is reduced; the energy consumption for waste treatment is low, and the cost is saved.)

1. The comprehensive utilization method of the aerated concrete waste is characterized by comprising the following steps:

1) crushing the waste material to enable the diameter of the waste material to be 0.2-1 mm;

2) and (3) adding the waste serving as the aggregate into the aerated concrete mixture, and stirring in a pouring stirrer, wherein the adding amount of the waste is 3-8% of the total mass of the aerated concrete mixture.

3) New concrete blocks or slabs are prepared from the concrete mix.

2. The comprehensive utilization method of the aerated concrete waste according to claim 1, characterized in that: the waste material crushing comprises the following steps:

1.1) preliminarily crushing the waste by adopting a double-shaft metal crusher;

1.2) crushing the waste by adopting a ring hammer European-type crusher to ensure that the diameter of the waste is 0.2-1 mm.

3. The comprehensive utilization method of the aerated concrete waste according to claim 1, characterized in that: after the waste materials are crushed, the waste materials are conveyed to a transition bin of a pouring building through a pneumatic conveyor to be temporarily stored, and before the concrete aerated concrete mixture is stirred, the transition bin mixes the waste materials into a pouring stirrer.

4. The comprehensive utilization method of the aerated concrete waste according to claim 1, characterized in that: the breakage rate of the waste is more than 90%.

5. The comprehensive utilization method of the aerated concrete waste according to claim 2, characterized in that: the waste materials are grabbed by a grab bucket and thrown into a double-shaft metal crusher for primary crushing.

6. The comprehensive utilization method of the aerated concrete waste according to claim 1, characterized in that: the waste materials comprise the scraps removed in the cutting process in the aerated concrete plate and building block production line, and the waste materials generated by truncating the aerated concrete plate and the building block which cannot be repaired.

7. The comprehensive utilization method of the aerated concrete waste according to claim 1, characterized in that: the aerated concrete mixture is formed by mixing sand, fly ash, lime, cement, a gas former and water.

8. The utility model provides an aerated concrete waste material comprehensive utilization system which characterized in that: the device comprises a double-shaft metal crusher, a ring hammer European-edition crusher, a transition bin and a pouring stirrer; the discharge hole of the double-shaft metal crusher is connected with the feed hole of the ring hammer European-edition crusher; the discharge port of the ring hammer European plate crusher is connected with the feed port of the transition bin through a pneumatic conveyor; and a discharge port of the transition bin is connected with a pouring mixer.

9. The comprehensive utilization system of aerated concrete waste according to claim 8, characterized in that: a filter screen is arranged in the ring hammer European-plate crusher, and the diameter of a mesh of the filter screen is 0.2-1 mm.

10. The comprehensive utilization system of aerated concrete waste according to claim 8, characterized in that: and a ball valve for controlling the waste feeding amount is arranged at the outlet of the transition bin.

Technical Field

The invention belongs to the field of aerated concrete waste treatment, and particularly relates to a comprehensive utilization method and system for aerated concrete waste.

Background

Waste materials of traditional aerated concrete material production plants are piled up like a mountain and cannot be efficiently treated, so that pollution is caused and land is occupied. In order to solve the problems, part of aerated concrete material production plants have treated and reutilized the waste materials, and the current common waste material utilization production lines and process planning schemes have the following two types:

a first type of plate material waste recycling system and method disclosed in patent No. CN 110090718A, the method comprising the steps of: the method comprises the following steps of (1) strongly crushing waste leftover materials and unqualified plates of the plates by a crusher to form irregular blocky plates with the length not more than 100 mm; conveying the primarily crushed waste materials into a ball mill tank body through a feeding machine and a conveying belt, and feeding for 15-18 t each time; firstly adding grinding balls into the ball mill, then adding water into the ball mill while adding waste materials, wherein the water addition amount is more than 90% of the barrel of the ball mill, and the grinding time is 10-12 h; and conveying the ground slurry to a stirring tank for continuous stirring for later use. In the waste recovery system, the ball mill cylinder can be wrapped and ground, and the wrapping and grinding of the ball mill cylinder can finally influence the quality of the reprocessed product.

The second type is that the waste material is crushed by a jaw crusher and then is conveyed to an environment-friendly recycled aggregate strengthening and pulverizing integrated system disclosed as CN 106582999A for treatment, the environment-friendly recycled aggregate strengthening and pulverizing integrated system comprises a modified Raymond mill, a cyclone, a matched air pipe, a matched support and a dust collection and air pressure adjusting system, and the adjusting system comprises a pressure type filter bag type dust collector, a pressure dividing valve and a matched support. The process has the advantages of high energy consumption of the grinding line, low yield and high comprehensive treatment cost of the waste.

Disclosure of Invention

The invention aims to provide a comprehensive utilization method and a comprehensive utilization system for aerated concrete waste, aiming at the defects that the treatment cost of the aerated concrete waste is high, the quality of a product is influenced when the waste is recycled and the like in the prior art.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the invention relates to a comprehensive utilization method of aerated concrete waste, which comprises the following steps:

1) crushing the waste material to enable the diameter of the waste material to be 0.2-1 mm;

2) the waste is used as aggregate to be mixed into the aerated concrete mixture and is stirred in a pouring stirrer, and the mixing amount of the waste is 3-8% of the total mass of the aerated concrete mixture;

3) new concrete blocks or slabs are prepared from the concrete mix.

The mixing amount of the waste materials must be strictly controlled, and too much waste materials are mixed, so that the binding power of the aerated concrete mixture is reduced, and finally, cracks are easily generated on the aerated concrete blocks/plates; too little waste incorporation can result in a reduction in the strength of the aerated concrete block/panel.

Preferably, the waste material fragmentation comprises the steps of:

1.1) preliminarily crushing the waste by adopting a double-shaft metal crusher;

1.2) crushing the waste by adopting a ring hammer European-type crusher to ensure that the diameter of the waste is 0.2-1 mm.

When the waste particles are too fine or too coarse, the waste particles cannot play a role of aggregate, and the waste particles which are too fine or too coarse are used as the aggregate, so that the strength, the crack resistance and the like of a product formed by pouring can be influenced.

Preferably, after the waste is crushed, the waste is conveyed to a transition bin of a pouring building through a pneumatic conveyor for temporary storage, and before the concrete aerated concrete mixture is stirred, the transition bin mixes the waste into the pouring mixer.

Preferably, the crushing rate of the waste is more than 90%, so that the waste is fully utilized.

Preferably, the waste material snatch and put into in the biax metal crusher through the grab bucket and carry out preliminary crushing, the power is low the moment of torsion is big, is fit for broken aerated concrete, realizes low energy consumption high efficiency.

Preferably, the waste materials include aerated concrete plates, scraps removed in a cutting process in a block production line, and waste materials generated by truncating unrepairable aerated concrete plates and blocks.

Preferably, the aerated concrete mixture is formed by mixing sand, fly ash, lime, cement, a gas former and water.

The invention also relates to an aerated concrete waste comprehensive utilization system, which comprises a double-shaft metal crusher, a ring hammer European-edition crusher, a transition bin and a pouring mixer; the discharge hole of the double-shaft metal crusher is connected with the feed hole of the ring hammer European-edition crusher; the discharge port of the ring hammer European plate crusher is connected with the feed port of the transition bin through a pneumatic conveyor; and a discharge port of the transition bin is connected with a pouring mixer.

Preferably, a filter screen is arranged in the ring hammer European plate crusher, and the diameter of a mesh of the filter screen is 0.2-1 mm, so that the diameter of the crushed waste is controlled.

Preferably, the outlet of the transition bin is provided with a ball valve for controlling the feeding amount of the waste materials, and the ball valve is used for controlling the mixing amount of the waste materials.

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

1. the method comprises the steps of firstly primarily crushing the aerated concrete waste by the aid of the double-shaft metal crusher, then crushing the aerated concrete waste by the aid of the ring hammer European-type crusher, and finally doping the crushed waste into a mixture as concrete pouring aggregate, so that the problems of pollution and land occupation caused by the aerated concrete waste are solved, the consumption of lime and cement can be reduced in the next concrete material preparation process, and cost is reduced.

2. The method has the advantages that the aerated concrete waste is directly put into use after being primarily crushed and crushed by the ring hammer European crusher, and compared with the traditional circulating crushing scheme of the ball mill, the reduction of the product quality caused by the wrapping and grinding of the barrel of the ball mill is avoided; compared with the scheme of milling powder by using a jaw crusher and a Raymond mill, the method has the advantages of low energy consumption, high yield and low cost.

Drawings

FIG. 1 is a schematic structural diagram of an aerated concrete waste comprehensive utilization system related to the invention;

description of the labeling: 1-double-shaft metal crusher, 2-ring hammer European crusher, 3-transition bin and 4-pouring stirrer.

Detailed Description

For further understanding of the present invention, the present invention will be described in detail with reference to examples, which are provided for illustration of the present invention but are not intended to limit the scope of the present invention.