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A preparation method of copper tailings porous autoclaved lime-sand brick

A technology of autoclaved lime-sand bricks and copper tailings, which is applied in the field of building materials, can solve the problems of insufficient mechanical properties and poor thermal insulation of lime-sand bricks, and achieve the effects of improving thermal insulation performance, porosity, and cell wall permeability

Active Publication Date: 2021-04-30
林飘飘
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main technical problem to be solved by the present invention is: Aiming at the problem of poor thermal insulation of traditional lime-sand bricks and insufficient mechanical properties after the compaction process, a preparation method of copper tailings porous autoclaved lime-sand bricks is provided

Method used

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  • A preparation method of copper tailings porous autoclaved lime-sand brick

Examples

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example 1

[0020] Pour the bagasse into the steam explosion device, keep the pressure at 3.0 MPa for 45 seconds, then open the discharge valve to collect the steam-exploded bagasse, put the steam-exploded bagasse in a pulverizer and pass it through a 100-mesh sieve , to get bagasse powder, in parts by weight, 20 parts of bagasse powder, 3 parts of pectinase, 40 parts of deionized water are placed in No. 1 beaker, and No. 1 beaker is placed in digital display speed measuring constant temperature magnetic stirrer , at a temperature of 50°C and a rotational speed of 200r / min, soak at a constant temperature for 60 minutes to obtain No. 1 soaking solution, then filter the soaking solution to obtain No. 1 filter residue, and then mix No. Put it in the No. 2 beaker at a ratio of 1:30, mix and soak for 60 minutes at a speed of 300r / min to obtain the No. 2 soaking solution, then filter the No. 2 soaking solution to obtain the No. 2 filter residue, and then put the No. 2 filter residue in In an ov...

example 2

[0022] Pour the bagasse into the steam explosion device, keep the pressure at 3.0 MPa for 45 seconds, then open the discharge valve to collect the steam-exploded bagasse, put the steam-exploded bagasse in a pulverizer and pass it through a 100-mesh sieve , to get bagasse powder, in parts by weight, 20 parts of bagasse powder, 3 parts of pectinase, 40 parts of deionized water are placed in No. 1 beaker, and No. 1 beaker is placed in digital display speed measuring constant temperature magnetic stirrer , at a temperature of 50°C and a rotational speed of 200r / min, soak at a constant temperature for 60 minutes to obtain No. 1 soaking solution, then filter the soaking solution to obtain No. 1 filter residue, and then mix No. Put it in the No. 2 beaker at a ratio of 1:30, mix and soak for 60 minutes at a speed of 300r / min to obtain the No. 2 soaking solution, then filter the No. 2 soaking solution to obtain the No. 2 filter residue, and then put the No. 2 filter residue in In an ov...

example 3

[0024] Add carrageenan powder and water into No. 3 beaker at a mass ratio of 1:100, stir and mix with a glass rod for 30 minutes, let it stand for swelling for 4 hours, and then move No. , at a rotation speed of 500r / min, heat and stir to dissolve for 50min to obtain chitosan liquid; add chitosan to water in a mass ratio of 1:100 into a No. 4h, then move the No. 4 beaker into a magnetic stirrer with digital display speed measurement and constant temperature, and heat and stir to dissolve for 50min at a temperature of 100°C and a rotation speed of 500r / min to obtain a chitosan solution; in parts by weight, 20 1 part of carrageenan solution, 20 parts of chitosan solution, and 5 parts of mussel foot mucin were placed in a No. 5 beaker, and stirred and mixed for 50 minutes under the condition of a rotating speed of 500r / min to obtain the mixed solution; in parts by weight, 30 parts of copper tailings, 3 parts of biogas slurry, 3 parts of phospholipids, 0.3 parts of sucrose, and 30...

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Abstract

The invention discloses a method for preparing porous autoclaved lime-sand bricks from copper tailings, which belongs to the technical field of building materials. In the present invention, 20-30 parts of copper tailings, 2-3 parts of biogas slurry, 2-3 parts of phospholipids, 0.1-0.3 parts of sucrose, and 20-30 parts of deionized water are mixed and fermented by weight, filtered, and dried. Ball milling, sieving, and carbonization to obtain pretreated copper tailings powder; mix and soak pretreated copper tailings powder and hydrochloric acid at a mass ratio of 1:20 to 1:30, filter, wash, dry, and calcinate to obtain modified copper tailings Mineral powder; in parts by weight, 80-100 parts of aggregate, 30-40 parts of modified copper tailings powder, 10-20 parts of pretreated bagasse, 10-20 parts of slaked lime, 10-20 parts of polyethylene Amine, 60 to 80 parts of the mixed solution are stirred and mixed, and then 0.03 to 0.05 times the mass of the aggregate isocyanate is added, pressed into shape, and autoclaved for curing to obtain porous autoclaved lime-sand bricks from copper tailings. The porous autoclaved lime-sand brick with copper tailings provided by the invention has the characteristics of excellent thermal insulation and mechanical properties.

Description

technical field [0001] The invention discloses a method for preparing porous autoclaved lime-sand bricks from copper tailings, which belongs to the technical field of building materials. Background technique [0002] The invention and application of autoclaved lime-sand brick (referred to as lime-sand brick) has a history of more than 100 years. Its raw materials are mainly sand and limestone, and some fly ash can also be mixed. It is a kind of raw material that is relatively common and easy to obtain. Wall material; it adopts pressing molding, autoclave curing process, and mature production technology. It is a wall material that can realize industrialized mass production. Its commonly used specifications are the same as red bricks, easy to use, and the masonry construction method is close to the traditional one. Lime-sand bricks have excellent physical and mechanical properties and can meet the needs of existing construction projects. In addition, its price is also low an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/10C04B20/04C04B20/02
CPCC04B20/04C04B28/10C04B2201/32C04B2201/50C04B14/068C04B18/248C04B24/121C04B24/282C04B24/16C04B24/38C04B24/14C04B18/12C04B20/02
Inventor 苗霞明朱冬梅吴庆梅
Owner 林飘飘