Background technology
Mineral Resources in China 80% is for being total to associated minerals, and a large amount of valuable resources retain among the mine tailing, and tailings impoundment need take a large amount of soils.Exceed the time limit in a lot of mine tailing storehouses or sh is used, even violation operation, makes the mine tailing stock in great potential safety hazard, and the people's property and the life security of surrounding area caused serious threat.
Flyash is to receive the thin ash of catching the flue gas behind coal combustion; Flyash also is the main solid waste that the coal-burning power plant discharges; Be one of bigger industrial residue of the current discharge capacity of China, along with development of electric power industry, the flyash quantity discharged of coal-burning power plant increases year by year.A large amount of flyash does not add processing, will produce airborne dust, atmosphere pollution; If entering water system can cause the river to silt up, and toxic chemical substance wherein also can work the mischief to human body and biology.
Chinese patent Granted publication CN 1256303 C, on May 17 2006 Granted publication day, name is called " high-intensity lytag and production technique thereof "; Disclose a kind of high-intensity lytag and production technique thereof, be with flyash, clay, combustion-supporting material, contain or do not contain the additives composition, this product is widely used in material of construction and materials for wall; Less investment, cost is low, is convenient to penetration and promotion; Utilize industrial residue, turn waste into wealth, help environment protection.It is characterized in that the prescription that it contains by following weight percent is that raw material is processed: flyash: 75~90%, clay: 5~20%, combustion-supporting material: 1~5%.
The weak point of above-mentioned patent is: high-intensity lytag is with flyash, clay, combustion-supporting material, contains or do not contain the additives composition; Though flyash can generate pore through the burning back in haydite; But the amount of pore is less relatively, and the viscosity of clay is lower than 200
MPasBelow, to carry out balling-up after using clay and flyash to mix merely and be haydite, the intensity of its haydite is less, add the intensity after water glass can improve the haydite balling-up, but through behind 1100~1300 ℃ of high temperature sinterings, the intensity of finished product will descend significantly.
Summary of the invention
The objective of the invention is to overcome weak point in the prior art, a kind of spheroidal attapulgite flyash haydite is provided.
Spheroidal attapulgite flyash haydite is made up of the sticking attapulgite clay powder of height, attapulgite clay mine tailing, flyash, kaolin mine tailing, silica sand mine tailing and wood dust.
The working method of spheroidal attapulgite flyash haydite: is spheroidal attapulgite flyash haydite with the batching of spheroidal attapulgite flyash haydite through mix, granulation, roasting, cooling and screening and packing.
Attapulgite clay be a kind of layer of chain-like structure contain Shuifu County's zeopan clay mineral; The attapulgite clay soil property is fine and smooth; Water-absorbent is strong; Tool viscosity and plasticity-help the bonding between the raw material when wet, can improve granule strength, sticking power and the porosity of spheroidal attapulgite flyash haydite.
High sticking attapulgite clay powder is meant gets 28.0g attapulgite clay powder sample; Add in the suspension-s cup of impeller, add 372g water again, the suspension-s cup is placed on the impeller; Under 11000 rev/mins rotating speed, stirred 20 minutes; To pass through the high-speed stirring sample suspension again and pour in the beaker of 250ml, the viscosity of using NDJ-1 type rotational viscosimeter to test its suspension-s, tested viscosity value>=2200
MPasThe attapulgite clay powder be high sticking attapulgite clay powder, the height that the present invention selects for use glues attapulgite clay powder particles fineness≤0.074 millimeter.
The flyash staple is silicon-dioxide, aluminium sesquioxide, red oxide of iron, quicklime and uncompleted burned carbon, does not fire charcoal and is loose porous form more, the particle fineness of flyash≤0.10 millimeter.
The soft easy dispersion suspension of kaolin matter in water, have good plasticity-and higher cohesiveness, the Al2O3 content in the kaolin is higher, the intensity that helps improving spheroidal attapulgite flyash haydite with reduce maturing temperature.
Attapulgite clay and kaolin can mix in recovery process has a certain amount of rubble and earth; Can't sieve; Abandon as a kind of mine tailing; Cause a large amount of wastings of resources, the present invention is a mine tailing with attapulgite clay mine tailing and kaolin mine tailing pulverize separately, particle fineness≤0.10 millimeter.
The silica sand mine tailing helps improving the intensity of spheroidal attapulgite flyash haydite, the silica sand mine tailing particle fineness that the present invention selects for use≤0.15 millimeter.
It is in order to increase the porosity of spheroidal attapulgite flyash haydite that the present invention adopts wood dust, and spheroidal attapulgite flyash haydite is in roasting process, and the wood chip burning in the haydite is ashes, forms a large amount of micropores, the particle fineness of wood dust≤0.10 millimeter.
The present invention is achieved through following technical proposals:
1, the batching of spheroidal attapulgite flyash haydite is made up of following component by weight percentage: high sticking attapulgite clay powder 2~15%, attapulgite clay mine tailing 5~25%, flyash 45~75%, kaolin mine tailing 1~10%, silica sand mine tailing 1~10% and wood dust 1~10%.
2, import the granulating disc granulation after the batching adding stirrer for mixing of the working method of spheroidal attapulgite flyash haydite: ⑴ with spheroidal attapulgite flyash haydite, particle diameter is controlled at 3~30 millimeters; ⑵ the particle input internally heated type revolution roasting in kilns after with granulation, maturing temperature is controlled at 550~850 ℃, and roasting time was controlled at 1~5 hour; ⑶ cool off in the particle input rotary type cooling machine after with roasting, after overcooling and screening, be packaged as spheroidal attapulgite flyash haydite.
Screening is in order to remove chip and the ashes that spheroidal attapulgite flyash haydite produces in roasting process.
Because the granule strength after the granulation of the present invention is higher, when adopting the internally heated type rotary kiln to carry out roasting, maturing temperature is controlled at 550~850 ℃; Compare with 1100~1300 ℃ of high temperature sinterings of ordinary method; It is low to have sintering temperature, reduces energy consumption, the characteristics of the fast and low production cost of speed of cooling.
Spheroidal attapulgite flyash haydite is spheroidal, and epidermis is coarse and hard, and there is the number of fine pore inside, be a kind of in light weight, intensity is high, thermal conductivity is low, refractoriness is high, chemicalstability is good, weather resistance and the good building porcelain granule of heat preservation and soundproof performance.
The present invention fully utilizes flyash and mine tailing production spheroidal attapulgite flyash haydite, not only helps improving resource utilization, turns waste into wealth, and can also reduce land occupation, and protection environment and environment purification are to achieve many things at one stroke.
Spheroidal attapulgite flyash haydite is applicable to produces haydite concrete and heat-insulating and noise-insulating material.