阅读说明：本技术 一种基于尾矿溶液的非烧结砖及制造工艺 (Non-sintered brick based on tailing solution and manufacturing process ) 是由 赵明 刘文龙 伍根伙 张喜文 陈伟明 李仰根 于 2019-10-24 设计创作，主要内容包括：本发明公开了一种基于尾矿溶液的非烧结砖及制造工艺,包括：尾矿溶液,轻质骨料,固化剂,所述固化剂至少包括普硅水泥,和硫铝酸盐水泥,整合剂,所述整合剂包括聚丙烯酰胺,增强剂,所述增强剂包括锂盐,具体质量配比为尾矿溶液：35-60份；轻质骨料：20-50份；固化剂：10-40份；整合剂：1-10份；增强剂：1-5份。采用压制成型工艺得到的非烧结砖,具有轻质高强的性能优势,采用模具的方式制造效率高,养护周期短,生产效率高。(The invention discloses a non-sintered brick based on a tailing solution and a manufacturing process, wherein the manufacturing process comprises the following steps: the composition comprises a tailing solution, a lightweight aggregate and a curing agent, wherein the curing agent at least comprises ordinary cement, sulphoaluminate cement and an integrating agent, the integrating agent comprises polyacrylamide and a reinforcing agent, the reinforcing agent comprises lithium salt, and the tailing solution comprises the following components in percentage by mass: 35-60 parts; light aggregate: 20-50 parts; curing agent: 10-40 parts; an integrating agent: 1-10 parts; reinforcing agent: 1-5 parts. The non-sintered brick obtained by the press forming process has the advantages of light weight, high strength, high manufacturing efficiency by adopting a die, short maintenance period and high production efficiency.)

1. A non-fired brick based on a tailings solution, comprising: the tailing solution, lightweight aggregate, curing agent, wherein the curing agent at least comprises ordinary cement, sulphoaluminate cement and integrating agent, the integrating agent comprises polyacrylamide and reinforcing agent, the reinforcing agent comprises lithium salt, the concrete mass ratio is,

tailing solution: 35-60 parts;

light aggregate: 20-50 parts;

curing agent: 10-40 parts;

an integrating agent: 1-10 parts;

reinforcing agent: 1-5 parts.

2. The tailing solution-based non-sintered brick according to claim 1, characterized in that: the tailings are one or more of copper tailings, iron tailings, manganese tailings and gold tailings.

3. The tailing solution-based non-sintered brick according to claim 1, characterized in that: the solid content of the tailing solution is 30-70%.

4. The tailing solution-based non-sintered brick according to claim 1, characterized in that: the lithium salt includes lithium carbonate and lithium sulfate.

5. The tailing solution-based non-sintered brick according to claim 1, characterized in that: the lightweight aggregate comprises one or more of ceramsite, expanded perlite and coal gangue.

6. A manufacturing process of a non-sintered brick based on a tailing solution is characterized by comprising the following steps:

s1: adding a tailing solution, a light aggregate, a curing agent, an integrating agent and a reinforcing agent into a stirrer, and stirring for at least 3min until slurry is in a non-fluid state to obtain an intermediate, wherein the curing agent at least comprises ordinary silica cement and sulphoaluminate cement, the integrating agent comprises polyacrylamide, and the reinforcing agent comprises lithium salt;

s2: filling the intermediate body into a mould, and pressing and molding the intermediate body through a pressure head matched with the mould;

s3: and moving the mold to a curing kiln for curing, and demolding after the curing age is 1-3d to obtain the non-sintered brick.

7. The process of claim 6, wherein the step of manufacturing the non-sintered brick based on the tailing solution comprises the following steps: the press molding in step S2 is a vibration press molding.

8. The process of claim 6, wherein the step of manufacturing the non-sintered brick based on the tailing solution comprises the following steps: the temperature of the curing kiln is 40-60 ℃.

9. The process of claim 6, wherein the step of manufacturing the non-sintered brick based on the tailing solution comprises the following steps: the tailings are one or more of copper tailings, iron tailings, manganese tailings and gold tailings.

10. The process of claim 6, wherein the step of manufacturing the non-sintered brick based on the tailing solution comprises the following steps: the solid content of the tailing solution is 30-70%.

Technical Field

The invention relates to the field of non-sintered bricks, in particular to a non-sintered brick based on a tailing solution and a manufacturing process thereof.

Background

After decades of large-scale exploitation, our country has more serious resources and environmental conditions, which is not optimistic. On the one hand, mine resources are facing exhaustion; on the other hand, the tailings generated by mineral separation are piled up in large quantity. According to the survey and statistics of national development and improvement committee, in 2013, the tailings production amount in China is 16.49 hundred million t, the commensurately increased 1.73% t, the comprehensive utilization amount of the tailings is 3.12 hundred million t, and the commensurately increased 7.96%. By the end of 2013, the accumulated stock of the tailings in China reaches 146 hundred million t. The tailings not only waste mineral resources, but also occupy land resources, and meanwhile, the tailings are accumulated for a long time and easily pollute water sources, air and the like, thereby causing serious threats to the ecological environment and the life and property safety of people.

The traditional bricks are all made by sintering, and the research on the non-sintered bricks is started in recent years, but the existing non-sintered bricks are generally low in strength, long in curing period and low in production efficiency. The existing tailings generally exist in a solution form after primary separation, and the conventional utilization mode also needs to be realized by removing water. Therefore, the development of a non-sintered brick with high strength and high production efficiency and a manufacturing process thereof based on the tailing solution are still needed to be solved.

Disclosure of Invention

The invention overcomes the defects of the prior art and provides a non-sintered brick based on a tailing solution and a manufacturing process thereof.

In order to achieve the purpose, the invention adopts the technical scheme that: a non-sintered brick based on tailing solution and a manufacturing process, comprising: the tailing solution, lightweight aggregate, curing agent, wherein the curing agent at least comprises ordinary cement, sulphoaluminate cement and integrating agent, the integrating agent comprises polyacrylamide and reinforcing agent, the reinforcing agent comprises lithium salt, the concrete mass ratio is,

tailing solution: 35-60 parts;

light aggregate: 20-50 parts;

curing agent: 10-40 parts;

an integrating agent: 1-10 parts;

reinforcing agent: 1-5 parts.

In a preferred embodiment of the invention, the tailings are one or more of copper tailings, iron tailings, manganese tailings and gold tailings.

In a preferred embodiment of the invention, the solid content of the tailing solution is 30-70%.

In a preferred embodiment of the present invention, the lithium salt includes lithium carbonate and lithium sulfate.

In a preferred embodiment of the invention, the lightweight aggregate comprises one or more of ceramsite, expanded perlite and coal gangue.

In a preferred embodiment of the invention, the curing agent further comprises gypsum, and the gypsum is anhydrous anhydrite.

The invention also provides another technical scheme, which comprises the following steps:

s1: adding a tailing solution, a light aggregate, a curing agent, an integrating agent and a reinforcing agent into a stirrer, and stirring for at least 3min until slurry is in a non-fluid state to obtain an intermediate, wherein the curing agent at least comprises ordinary silica cement and sulphoaluminate cement, the integrating agent comprises polyacrylamide, and the reinforcing agent comprises lithium salt;

s2: filling the intermediate body into a mould, and pressing and molding the intermediate body through a pressure head matched with the mould;

s3: and moving the mold to a curing kiln for curing, and demolding after the curing age is 1-3d to obtain the non-sintered brick.

In a preferred embodiment of the present invention, the press molding in step S2 is a vibration press molding.

In a preferred embodiment of the invention, the temperature of the curing kiln is 40-60 ℃.

In a preferred embodiment of the invention, the tailings are one or more of copper tailings, iron tailings, manganese tailings and gold tailings.

In a preferred embodiment of the invention, the solid content of the tailing solution is 30-70%.

In a preferred embodiment of the present invention, the lithium salt includes lithium carbonate and lithium sulfate.

In a preferred embodiment of the invention, the lightweight aggregate comprises one or more of ceramsite, expanded perlite and coal gangue.

In a preferred embodiment of the invention, the curing agent further comprises gypsum, and the gypsum is anhydrous anhydrite.

The invention solves the defects in the background technology, and has the following beneficial effects:

(1) the lightweight aggregate is added into the tailing solution, and as the lightweight aggregate has a certain degree of water absorption, part of water in the tailing solution can be absorbed, and the flow state in the tailing solution is reduced. The integration agent polyacrylamide is added, so that suspended substances and the like in the tailing solution can be neutralized, and bridge adsorption is performed, so that the slurry forms a gel state, and all components in the slurry are bonded.

(2) The curing agent comprises ordinary cement and sulphoaluminate cement, can carry out hydration reaction with water in a tailing solution, the sulphoaluminate cement ensures the early curing effect, the ordinary cement provides the guarantee of later strength, the gypsum is also included in the curing agent, and the setting time of slurry and the later strength development can be better ensured through anhydrous anhydrite.

(3) The lithium salt serving as the reinforcing agent is adopted, and can react with calcium hydroxide generated by hydration of the lithium salt in the reaction process of the curing agent to generate lithium hydroxide with higher alkalinity, so that the hydration of the ordinary portland cement and the sulphoaluminate cement is promoted, and meanwhile, the strong alkaline action of the lithium hydroxide can excite the mineral components in tailings to play the potential activity of the mineral components, so that the strength of the non-sintered brick is increased.

(4) In the hydration process of cement, a layer of membrane with uniform texture is formed on the surface of the cement, and the polymerization of polyacrylamide forms a space network structure, so that the bridging effect is achieved, the porosity is reduced, and Ca (OH)₂The crystals grow in the unhydrated particles and the hydrated product structure, increasing the strength of the entire non-sintered brick.

(5) The lightweight aggregate has certain water absorption, and water is separated out and continuously reacts with the curing agent at the temperature of 40-60 ℃ in the later curing process, so that the lightweight aggregate not only ensures the lightweight property of the non-sintered brick, but also ensures the strength of the non-sintered brick in the steam curing process, thereby forming the light-weight high-strength non-sintered brick.

(6) Through stirring in the mixer, stir into the non-flow state, can make things convenient for the shaping, can the press forming become the non-baked brick of different shapes and size through mould and the pressure head of matching, adopt the vibrations press forming to guarantee closely knit degree, the mode manufacturing efficiency who adopts the mould is high, and the maintenance cycle is short, and production efficiency is high.

Detailed Description

The present invention will now be described in further detail with reference to examples.

A non-sintered brick based on tailing solution and a manufacturing process, comprising: the tailing solution, lightweight aggregate, curing agent, wherein the curing agent at least comprises ordinary cement, sulphoaluminate cement and integrating agent, the integrating agent comprises polyacrylamide and reinforcing agent, the reinforcing agent comprises lithium salt, the concrete mass ratio is,

tailing solution: 35-60 parts;

light aggregate: 20-50 parts;

curing agent: 10-40 parts;

an integrating agent: 1-10 parts;

reinforcing agent: 1-5 parts.