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Process method for preparing steam-cured brick by molybdenum tailings

A process method, the technology of molybdenum tailings, which is applied in the field of steam-cured bricks using molybdenum tailings, can solve the problems of not being able to quickly absorb the moisture of the mortar, the large amount of fly ash used, and the high density of steam-cured bricks, etc., to achieve Facilitate popularization and utilization, save resources and improve economic benefits

Inactive Publication Date: 2013-06-19
王国帅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses a large amount of fly ash in the preparation process, so that the prepared steam-cured brick has a high density and low water absorption rate, and cannot quickly absorb the moisture in the mortar during construction, and the use effect is not good; On the one hand, the comprehensive utilization value of fly ash is getting higher and higher, and its price is also rising all the way, which leads to the continuous increase in the cost of making bricks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The various process parameters involved in this embodiment are the optimal process parameters of the technical solution;

[0023] (1) Ingredients: 37.5% of molybdenum tailings, 37.5% of granite powder, 15% of slag, 8% of quicklime and 2% of gypsum are taken by weight percentage, and are ground and screened.

[0024] Among them, the SiO of the selected molybdenum tailings 2 content ≥ 40%, the fineness of the molybdenum tailings powder after grinding is: pass the molybdenum tailings powder through a 4900 hole / square centimeter sieve, the sieve residue is ≤ 20%, and the larger molybdenum tailings particles remaining after the sieve continue to grind until The fineness meets the requirements; the molybdenum tailings selected in this embodiment are the molybdenum tailings of the Jinduicheng Molybdenum Mining Area, and the content of molybdenum in the ore can reach 0.16%. After extracting the active components, the tailings account for 98.4%, of which the SiO 2 content ≥ 40...

Embodiment 2

[0054] (1) Ingredients: 57% of molybdenum tailings, 18% of granite powder, 15% of slag, 8% of quicklime and 2% of gypsum are taken by weight percentage, and are ground and screened.

[0055] Among them, the SiO of the selected molybdenum tailings 2 The content is ≥ 40%, and the fineness of the molybdenum tailings powder after grinding is: pass the molybdenum tailings powder through a sieve with 4900 holes / square centimeter, and the sieve residue is ≤ 20%; the molybdenum tailings selected in this embodiment are Jinduicheng Molybdenum tailings in molybdenum mining area.

[0056] Among them, the granite rock is the rock layer in the weakly weathered zone of the granite, and the fineness of the granite rock powder is: 4900 holes / square centimeter sieve, and the sieve allowance is ≤20%;

[0057] Among them, the effective CaO content of the quicklime is ≥60%, the MgO content is ≤5%, and the fineness of the quicklime powder is: the quicklime powder passes through a sieve with 900 ho...

Embodiment 3

[0083] (1) Ingredients: 50% of molybdenum tailings, 25% of granite powder, 15% of slag, 8% of quicklime and 2% of gypsum are taken by weight percentage, and then ground and screened.

[0084] Among them, the SiO of the selected molybdenum tailings 2 The content is ≥ 40%, and the fineness of the molybdenum tailings powder after grinding is: pass the molybdenum tailings powder through a sieve with 4900 holes / square centimeter, and the sieve residue is ≤ 20%; the molybdenum tailings selected in this embodiment are Jinduicheng Molybdenum tailings in molybdenum mining area.

[0085] Among them, the granite stone is the weakly weathered rock layer of granite, and the fineness of the granite stone powder is: the granite stone powder passes through a sieve with 4900 holes / square centimeter, and the sieve allowance is ≤20%;

[0086] Among them, the effective CaO content of the quicklime is ≥60%, the MgO content is ≤5%, and the fineness of the quicklime powder is: the quicklime powder ...

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Abstract

The invention relates to a process method for preparing a steam-cured brick by molybdenum tailings, which comprises the following steps of: (1) burdening: respectively grinding and screening 18-57% of molybdenum tailings, 18-57% of granite powder, 15% of slag, 8% of quick lime and 2% of gypsum; (2) mixing materials and stirring: mixing and evenly stirring the raw materials, adding 12-16% of water, controlling a slaking temperature to be 60-90DEG C, and slaking for 6-8 hours; (3) pressing and forming: adding mixture into equipment, controlling pressure to be 15Mpa for pressing and forming; (4)standing: standing the pressed and formed steam-cured brick at the normal temperature for 3-4h; and (5) carrying out autoclave curing: putting the steam-cured brick into a steam-cured chamber, carrying out steam curing by controlling a steam-cured condition, and finally standing for 0.5 hour to obtain the steam-cured brick. The steam-cured brick prepared with the method has the advantages of highcompressive strength which can achieve the strength level of MU (Masonry unit) 25, smaller density of steam-cured brick, small integral weight of the brick body, high water absorption and good use effect.

Description

technical field [0001] The invention relates to the field of building material preparation, in particular to a process for preparing steam-cured bricks from molybdenum tailings. Background technique [0002] With the rapid development of urbanization and the increasing number of industrial and civil buildings, clay red bricks need to consume a lot of clay, which has been banned by the state. Various brick-making enterprises have adopted different methods to produce bricks. Among them, the more representative unfired bricks are cement concrete bricks and fly ash steam-cured bricks. These types of bricks are pressed and formed by mixing cement, fly ash, sand, lime and some admixtures with water. However, with the popularization and application of non-fired bricks, the number of production enterprises and quantity is increasing, and the competition is fierce. At the same time, due to the rising prices of raw materials such as cement, the cost of cement concrete bricks has inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/10C04B18/12
CPCY02W30/91
Inventor 王国帅
Owner 王国帅