CN102241411A

CN102241411A - Formula and process for producing high-aluminum low-calcium calcium aluminate powder

Info

Publication number: CN102241411A
Application number: CN2011100827519A
Authority: CN
Inventors: 文邦祥; 张�杰; 袁伟
Original assignee: ZUNYI HENGXIN CHEMICAL CO Ltd
Current assignee: ZUNYI HENGXIN CHEMICAL CO Ltd
Priority date: 2011-03-31
Filing date: 2011-03-31
Publication date: 2011-11-16

Abstract

The invention discloses a formula and a process for producing high-aluminum low-calcium calcium aluminate powder. In the invention, the content of a raw material A1203 is improved to 60 to 65 percent (weight percent), the content of limestone is lowered to 34 to 39 percent (weight percent), the raw material A1203 and the limestone are ground in a grinder, the ground material is made into balls in a disc machine, water is added into cure the balls, raw coal powder in an amount of 10 to 15 percent (weight percent) is added to a kiln for calcining at controlled temperature, and high-aluminum low-calcium calcium aluminate powder can be obtained through grounding. When used as a water purifier, sediments can be reduced, the content of poly aluminum chloride is improved, the benefits are increased, and the reduced-temperature calcining helps to save coal and reduce cost. The high-aluminum low-calcium calcium aluminate powder can be widely used in the fields of metallurgy, chemical, pyroelectric paper making, pharmacy, waste water treatment and the like.

Description

Low calcium calcium aluminate powder production formula of high alumina and technology

Technical field

The present invention relates to alkali metal compound, or the preparing technical field of the compound of the compound metal beryllium of calcium, magnesium, aluminium, calcium, thorium.

Background technology

The calcium aluminate powder of Shi Yonging mostly is the content of the low aluminium calcium aluminate powder of high calcium, Cao up to about 31% in the market.The Recipe of the low aluminium calcium aluminate of traditional production high calcium is: composition of raw materials is pressed bauxite, Wingdale is 55%: 45%, the weight percent of solid fuel 20-24% mixes, after the grinding machine grinding, entering calcining furnace calcines under 1400 ℃ of left and right sides high temperature, grind again finished product, high calcium calcium aluminate product per ton will consume coal-fired 280kg approximately, the product that this prescription and traditional technology get is many as water purification agent, it is not high when water purification agent producer uses owing to alumina content, it is low to generate the polymkeric substance aluminum content, and the precipitation of the calcium chloride that obtains is many, and purifying water effect is poor, energy consumption is higher, and cost is higher; In the CN200510102756.8 of Zhengzhou Dengfeng Smelting Materials Co., Ltd. " production method of the lightweight high-calcium type calcium aluminate " patent, raw material is pressed aluminium vanadine 30-55% (weight percent), Wingdale 40-65% (weight percent), halogen compound additive 0.5-7% (weight percent), it is levigate that solid fuel 2-15% (weight percent) proportioning is mixed the back, add the water moulding, send into 1310-1350 ℃ of sintering state of kiln calcining, the gained grog lightweight high calcium calcium aluminate, though this prescription and technology descend to some extent than the amount of traditional technology Wingdale, but the highest 55% (weight percent) that be only of the amount of aluminium vanadine, incinerating temperature and coal-fired consumption all descend to some extent, but the alumina content of product is low, the calcium contents height, still not ideal enough as the water purification agent effect, economic and technical norms are also desirable not enough.

Summary of the invention

The purpose of this invention is to provide a kind of prescription and production technique that overcomes the low calcium calcium aluminate powder of the above defective high alumina that particularly aluminum content is low mainly as water scavengine agent, the present invention can increase the benefit, reduce production costs and improve decontamination effect improving, produce the polymerization calcium chloride that reaches GB.

For achieving the above object, the present invention adopts following proposal:

Raw materials by weight: bauxite 60-65%; Wingdale 34-39%; The coal-fired 10-13% of solid;

Behind the above raw materials by weight Microcomputerized dosing, grind with grinding machine, add water disk balling machine slaking balling-up in advance, enter rotary kiln and add coal dust calcining, grinding machine grinding, the qualified back of quality inspection, metering packing, warehouse-in, must dispatch from the factory by low calcium calcium aluminate qualified product by the high alumina of industry standard HG3476-2004.

Adopt above-mentioned raw materials proportioning and preparation technology's the low calcium calcium aluminate powder of high alumina, as water purification agent yield height, precipitate less solid fire coal and spray into sufficient combustion in the calcining kiln with pulvis, temperature of combustion more reduces, reduced coal consumption, reduced cost, because alumina content improves, calcium oxide content reduces, and it is effective that impurity easily generates polymer precipitation.Not only be widely used in the city water supply and sewage and purify, also can be used for fields such as chemical industry, metallurgy, thermoelectric papermaking, pharmacy, sewage disposal.

Description of drawings

Fig. 1 is the low calcium calcium aluminate powder production technique block diagram of high alumina of the present invention.

Embodiment

Raw material bauxite: Wingdale is pressed 60-65%: behind 34-39% (weight percent) Microcomputerized dosing, grinding machine is ground to the 80-120 order, add water and be sprayed onto disk or the further slaking balling-up of grinding machine, be mixed into the kiln calcining with coal dust 10-13% (weight percent), temperature is controlled at 1250-1290 ℃, be ground to the 70-130 order with grinding machine again, quality inspection, metering packing, put in storage, dispatch from the factory.

Claims

1. the prescription of the low calcium calcium aluminate of a high alumina, raw material aluminium vanadine 55% weight percent, Wingdale 45% weight percent mixing aftershaping, the coal-fired 20-24% weight percent of solid, it is characterized in that: improve the content weight percent of raw material bauxite, reduce the content weight percent of Wingdale.Microcomputerized dosing mixes back grinding machine grinding and adds the water cure balling-up, sends into kiln and adds the coal dust calcining, and regrind mill grinds.

2. according to the prescription of the low calcium calcium aluminate of the described high alumina of claim 1, it is characterized in that: the ratio weight percent of raw material bauxite and Wingdale is 60-65%:34-39%, the coal-fired grain weight amount of solid per-cent 10-13%.

3. the production technique of the low calcium calcium aluminate of high alumina is sent into about 1400 ℃ calcinings of kiln temperature behind the material forming, it is characterized in that: after Microcomputerized dosing mixed, grinding machine ground, and sends into disk balling machine and adds water cure, sent into kiln and added the coal dust calcining, and regrind mill grinds.

4. according to the production technique of the low calcium calcium aluminate of the described high alumina of claim 3, it is characterized in that: former coal dust sends into kiln and raw material is calcined together, and kiln temperature is controlled at 1250-1290 ℃.

5. according to the production technique of the low calcium calcium aluminate of the described high alumina of claim 3, it is characterized in that: the low calcium calcium aluminate of the high alumina after the calcining is milled to the 70-130 order with grinding machine.