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Sintered product of rejects and shale modular cellular bricks and preparing method thereof

A technology for sintered products and porous bricks, which is applied in the field of sintered products of shale modulus porous bricks from mining waste slag and its preparation. Improve the aesthetic effect of appearance texture, significant social and economic benefits, and improve the effect of plasticity index

Inactive Publication Date: 2010-06-23
南京鑫翔环保产业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for mining and dressing waste, due to the uncertainty of the mining point, the content of harmful minerals fluctuates greatly compared to the requirements of the sintered brick making process, and it is difficult to control, that is, if the following problems cannot be solved according to the existing process: (1) reach If it does not meet the basic requirements of plasticity required for molding, that is, it cannot be bonded, and it will be crisp and loose during molding, and the green body cannot be formed; Homogenization of raw materials can be achieved, but the pre-purification of harmful components in raw materials cannot be realized; (3) Ca2+ and Mg2+ cannot be fully realized during the sintering process Carry out effective chemical reaction, make it fix with stable compound, can't reach and reduce the amount of harmful free CaO and MgO; It pollutes the environment and endangers the health of the operators; (5) After a period of time, the finished products will explode in a self-decomposing manner

Method used

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  • Sintered product of rejects and shale modular cellular bricks and preparing method thereof
  • Sintered product of rejects and shale modular cellular bricks and preparing method thereof
  • Sintered product of rejects and shale modular cellular bricks and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] The sintered product of the mining and dressing waste shale modulus porous brick of the present invention is prepared by the following steps:

[0019] (1) Crushing: The mining and dressing waste in Zhongshan Coal Mine—coal gangue and shale are mixed in proportion and synchronously go through coarse crushing, fine crushing and sieving to make the raw material fineness reach less than 1.5mm, and 0.5mm accounts for 68 %, 0.25mm accounts for 36%;

[0020] (2) Ingredients: mix gangue and shale in a weight ratio of 85:15, add water and stir evenly, increase the added water from the usual 17% to 20%, and send it to storage and storage for less than 3 days Half;

[0021] (3) Molding: Send the stored material into the molding machine for semi-rigid plastic extrusion molding. Such as figure 1 As shown, the molded product is 11 rows of dislocated rectangular hole main bricks through the design of the main machine outlet mold, the specification size is 190×240×90 (mm), the vacuu...

Embodiment 2

[0032] The sintered product of the mining and dressing waste shale modulus porous brick of the present invention is prepared by the following steps:

[0033] (1) Crushing: Copper tailings and shale, which are mining and dressing waste residues in the Guli Copper Mine, are properly proportioned and synchronously undergo coarse crushing, fine crushing and sieving to make the raw material fineness reach a particle size of less than 1.5mm, 0.5mm Accounted for 65%, 0.25mm accounted for 35%;

[0034] (2) Batching: Batching copper tailings and shale at a weight ratio of 80:20, adding water and stirring evenly, increasing the amount of water added from the usual 16% to 18%, and sending it into storage and storage for 3 hours sky;

[0035] (3) Molding: Send the stored material into the molding machine for semi-rigid plastic extrusion molding. Such as Figure 4 , as shown in Figure 5, after the design of the main machine outlet mold, the formed product is 11 rows of dislocated rectan...

Embodiment 3

[0046] The sintered product of the mining and dressing waste shale modulus porous brick of the present invention is prepared by the following steps:

[0047](1) Crushing: Mix the waste residue of medium mining and beneficiation in Huzhou, Zhejiang Province - sand tailings and shale in proportion, and synchronously go through coarse crushing, fine crushing and sieving to make the raw material fineness reach less than 1.5mm, 0.5mm accounted for 69%, 0.25mm accounted for 37%;

[0048] (2) Ingredients: mix sand tailings and shale at a weight ratio of 75:25, add water and stir evenly, increase the amount of water added from the usual 16% to 20%, and send it to storage and storage, and the time is not 3 sky;

[0049] (3) Molding: Send the stored material into the molding machine for semi-rigid plastic extrusion molding; through the design of the main machine outlet mold, the molded product is 11 rows of misplaced rectangular strip holes with bricks, and the size is 140×240 ×90(mm)...

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Abstract

The invention discloses a sintered product of rejects and shale modular cellular bricks and a preparing method thereof. The preparing method of the product comprises the following steps of: ensuring that the raw material with the fineness being lower than 0.5 to 0.25 mm occupies 65 percent of all the raw materials through rough crushing, fine crushing and sifting; blending rejects and shale in proportion by weight of 70 to 85 percent: 15 to 30 percent, and adding water and uniformly stirring, and putting the material into a storage warehouse to be stored, wherein the quantity of water added is excessive; feeding the stored material into a molding machine to be conducted to semi-hard plastic extrusion molding; sintering at the maximum temperature of 1000 to 1080 DEG C for 8 to 16 hours; ensuring that the firing time is 28 to 36 hours; and slacking the material in water after kiln discharging and sorting. The main material of the product adopts rejects which are abandoned by most mines and required to be conducted to safe disposal, the preparing method can effectively and conjunctively utilize rejects, change waste into valuable, meet the requirements of energy saving and emission reduction, and achieve significant social benefit and economic benefit.

Description

technical field [0001] The invention belongs to new building wall materials, in particular to a sintered product of mining and dressing waste shale modulus porous brick and a preparation method thereof. Background technique [0002] Coal gangue, iron tailings, copper tailings, sand tailings and other mining and dressing wastes pile up like mountains in many areas of our country, not only occupying land, but also seriously polluting the environment. In the prior art, all coal gangue can be used to make bricks, but the raw material of coal gangue has a high calorific value, which not only reduces the production capacity of the roasting kiln, but also causes serious problems of frosting. There are also bricks made by mixing and pulverizing coal gangue and shale. The development direction of coal gangue sintered products is porous, energy-saving, high-strength and decorative. For porous bricks, the fine-grained particles of the broken raw materials are less than 2mm, and the pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B30/00B28B3/26
Inventor 王军仲黎明胡文成
Owner 南京鑫翔环保产业有限公司
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