CN101318674B

CN101318674B - Synthetic processing method for tail ore of phosphorus ore

Info

Publication number: CN101318674B
Application number: CN2008101240401A
Authority: CN
Inventors: 赵景台; 翟立东; 张廷卫; 田启生
Original assignee: Individual
Current assignee: YUNNAN SANMING XINJIANG MINING CO Ltd
Priority date: 2008-05-29
Filing date: 2008-05-29
Publication date: 2010-04-14
Anticipated expiration: 2028-05-29
Also published as: CN101318674A

Abstract

The invention discloses a comprehensive treatment method of tailing sand in phosphorite. The method comprises the following steps: the main components of the tailing sand in phosphorite are confirmedas magnesium oxide and calcium oxide by the precise laboratory analyses; the contents of the main components are determined; the precise and high-efficient floatation process is performed to extract the useful components with high economic value such as MgCO3, CaCO3, and the like, and the remnant tailings can be made into novel building materials such as foam concrete, aerated concrete, and the like, thus all the wastes discharged from phosphorite production are digested. The method realizes the purposes of recycling economy, reclaiming farmland, improving environment and saving energy. The method of the invention changes wastes into valuables, which benefits the country and the people, and meets the goals of technological innovation and sustainable development.

Description

A kind of integrated conduct method of phosphorite tailings sand

Technical field

The present invention relates to a kind of integrated conduct method of regeneration method, particularly a kind of phosphorite tailings sand of discarded tailing sand.

Background technology

CHARACTERISTICS OF TAILINGS SAND is the refuse during phosphorus ore is produced, and amount is big, occupy cultivated land, contaminate environment, harm resident.CHARACTERISTICS OF TAILINGS SAND is all emitting every day, and is cumulative, become important hidden danger, needs the fill protection.These refuses had not only accounted for and had ploughed but also contaminate environment, in case by rain drop erosion, threaten resident's safety, can't solve for a long time.Advocate under the energy-conserving and environment-protective policy in current country, press for and dispose these refuses.

Summary of the invention

The technical problem to be solved in the present invention is at the deficiencies in the prior art, has proposed a kind of integrated conduct method at phosphorite tailings sand.Phosphorite tailings sand is carried out regeneration, therefrom extract magnesium salts and lime carbonate, realize recycling economy, turn waste into wealth.

The technical problem to be solved in the present invention is achieved through the following technical solutions, a kind of integrated conduct method of phosphorite tailings sand, be characterized in: at first CHARACTERISTICS OF TAILINGS SAND is sieved, the particle of particle diameter 〉=0.2mm is sent into masher, the masher pulp density is 60～70%, be milled to 100 order all-pass mistakes, send into tempering tank with the breeze that screening is come out, tempering tank pH value is transferred at 9-10, solution with water glass furnishing 8-10%, proportional by 350～400 gram/ton CHARACTERISTICS OF TAILINGS SAND adds tempering tank, send into flotation machine behind uniform mixing, regulating the flotation machine pulp density is 50～60%, and maintenance pH is 9-10, earlier flotation agent oleic acid is carried out ultrasonic emulsification, the proportional that oleic acid after emulsification is pressed 230-260 gram/ton CHARACTERISTICS OF TAILINGS SAND adds flotation machine, 20～30 ℃ of flotation temperatures, and the proportional of pressing 40～60 gram/ton CHARACTERISTICS OF TAILINGS SAND in addition again adds the pore forming material pine tar, carry out the flotation first time, obtain MgCO ₃Rough concentrate, again through wash, filter, dry MgCO ₃Finished product;

Tail slurry I remaining after the flotation first time is sent into atomizer mill be milled to 200 orders, send into tempering tank, regulate pulp density 35～40%, according to the solids content in the ore pulp, the proportional of pressing 1000-1500 gram/ton adds activator soda, sends into flotation machine after the mixing, proportional by 300～400 gram/tons adds flotation agent lipid acid, and press 40-50 gram/ton adding pore forming material pine tar, and carry out the flotation second time, obtain CaCO ₃Rough concentrate, again through wash, filter, dry CaCO ₃Finished product.

The technical problem to be solved in the present invention can also come further to realize by the following technical programs, for the grade and the rate of recovery that improves concentrate, the MgCO that flotation obtains through the first time ₃Rough concentrate is sent into atomizer mill again, being milled to 200 follows with one's eyes into tempering tank, regulate pulp density 30～50%, the pH value is 9-10, according to the solids content in the ore pulp, the water glass solution that adds 8-10% by the proportional of 500 gram/tons, behind the uniform mixing, send into flotation machine, regulate pulp density 30～50% in the flotation machine, the pH value is 9-10, the proportional of oleic acid after the emulsification by 300～350 gram/tons added, proportional by 40～50 gram/tons adds the pore forming material pine tar again, carries out the flotation of elaboration ore deposit again, gets elaboration ore deposit MgCO ₃, again through wash, filter, dry MgCO ₃Finished product.

The present invention compared with prior art by the accurate assay to phosphorite tailings sand, determines that its main component is magnesium oxide and calcium oxide, and surveys its content, by accurate floatation process efficiently, therefrom extracts MgCO ₃, CaCO ₃Etc. the high useful composition of economic worth, last last tailings can be made into building material foamed concrete and gas concrete etc.So just can digest the whole refuses that emit in the phosphorus ore production fall.Realized recycling economy, returned the arable land, improved environment, the purpose of save energy.Method of the present invention turns waste into wealth, and benefits the nation and the people, and meets the target of scientific and technical innovation Sustainable development.

Embodiment

Learn that according to CHARACTERISTICS OF TAILINGS SAND Chemical Composition analysis report wherein magnesium oxide and calcium oxide content are more, magnesium oxide accounts for 16.45%, and calcium oxide accounts for 29.92%, account for 45.37% altogether, and silicon-dioxide accounts for 12%, and other iron, aluminium, manganese etc. are all below 2%.In CHARACTERISTICS OF TAILINGS SAND, magnesium oxide and calcium oxide do not exist with unbound state, but exist with the mineral form of magnesiumcarbonate and lime carbonate, and these two kinds of salt economic worths have potentiality to be exploited, and have a extensive future than higher.Magnesium salts particularly, promptly magnesium compound comprises MgO, Mg (OH) ₂, MgCO ₃Deng, in national economy, be widely used in a plurality of fields such as rubber, metallurgy, building materials, national defence, aviation, sewage disposal, desulfurization, agricultural, food, medicine.Though it is high that lime carbonate does not have magnesium salts to be worth, and also uses to some extent in a plurality of fields.

Show that according to phosphorite tailings sand grain size analysis report be mainly fine sand, the part accompanies medium sand.Be divided into several grades in the fine sand again, wherein particle diameter accounts for more than 40% 0.25～0.1 (mm) person, and 0.5～0.25 (mm) accounts for more than 30%, and both account for more than 80% altogether; 0.1～0.074 (mm) person accounts for more than 8.5%; 0.074～0.005 (mm) and the following person of 0.005 (mm) account for 2～3%, medium sand 1～0.5 (mm) accounts for less than 10%.

The present invention extracts magnesium salts and lime carbonate from phosphorite tailings sand, be recycling economy.At first costly magnesiumcarbonate (MgCO ₃) extract, further process series product thus, and then the lime carbonate (CaCO in the remaining material ₃) extract, Sheng tailings is used to make building material, foamed concrete etc. at last.

For this reason, the present invention at first sieves CHARACTERISTICS OF TAILINGS SAND, the particle of particle diameter 〉=0.2mm is sent into masher, the masher pulp density is 60～70%, is milled to 100 order all-pass mistakes, sends into tempering tank with the breeze that screening is come out, screening is mainly raised the efficiency like this, the optional DZSF type of screening plant vibratory screening apparatus, levigate equipment can be used Raymond mill, and granularity can be regulated.Floatation equipment can be used flotation column.It is made of cylinder (tube) and qi of chong channel ascending adversely device, mine-feeding equipment is at the top, foam overflows groove on top, the ore pulp of adding medicine is sent into cylindrical shell by the top mine-feeding equipment, the power of relying on for support slowly descends, and pressurized air is slowly risen along cylindrical shell by the device dispersed one-tenth small bubbles of bottom qi of chong channel ascending adversely, can float thereupon ore particle promptly attached to bubble floating to the slurries face, form the mineralized froth layer, rise to that overflow groove just flows out and be concentrate.Carry out washing and filtering again, oven dry makes product.Further deep processing can make serial magnesium salts product again.Washing, filtration, drying plant can be used EXMZL180/1250 type pressure filter, have multiple functions such as washing, filtration, cake of press, drying.

Tempering tank pH value is transferred at 9-10, solution with water glass furnishing 8-10%, proportional by 350～400 gram/ton CHARACTERISTICS OF TAILINGS SAND adds tempering tank, behind uniform mixing, send into flotation machine, regulating the flotation machine pulp density is 50～60%, maintenance pH is 9-10, at first flotation agent oleic acid is carried out ultrasonic emulsification, the emulsification grain is thin more good more, the proportional of the oleic acid after the emulsification being pressed 230-260 gram/ton CHARACTERISTICS OF TAILINGS SAND adds flotation machine, 20～30 ℃ of flotation temperatures, and the proportional of pressing 40～60 gram/ton CHARACTERISTICS OF TAILINGS SAND in addition again adds the pore forming material pine tar, carry out the flotation first time, get MgCO ₃Rough concentrate, again through wash, filter, dry MgCO ₃Finished product;

Tail slurry I remaining after the flotation first time is sent into atomizer mill be milled to 200 orders, send into tempering tank, regulate pulp density 35～40% in the tempering tank, according to the solids content in the ore pulp, the proportional of pressing 1000-1500 gram/ton adds activator soda, sends into flotation machine after the mixing, proportional by 300～400 gram/tons adds flotation agent lipid acid, and press 40-50 gram/ton and add the pore forming material pine tar, carry out the flotation second time, again through wash, filter, dry CaCO ₃Finished product.

Another kind of embodiment is: flotation obtains MgCO through the first time ₃Rough concentrate send into atomizer mill again, being milled to 200 follows with one's eyes into tempering tank, regulate pulp density 30～50%, the pH value is 9-10, according to the solids content in the ore pulp, the water glass solution that adds 8-10% by the proportional of 500 gram/tons, behind the uniform mixing, send into flotation machine, regulate pulp density 30～50% in the flotation machine, the pH value is 9-10, oleic acid after the emulsification is added during in the ratio of 300～350 gram/tons, proportional by 40～50 gram/tons adds the pore forming material pine tar again, carries out the flotation of elaboration ore deposit, gets elaboration ore deposit MgCO ₃, again through wash, filter, dry MgCO ₃Finished product, grade can reach more than 95%.

Tail slurry I remaining after the flotation first time is sent into atomizer mill be milled to 200 orders, tail slurry II remaining after carrying out the flotation of elaboration ore deposit sends into tempering tank, regulate pulp density 35～40% in the tempering tank, according to the solids content in the ore pulp, the proportional of pressing 1000-1500 gram/ton adds activator soda, sends into flotation machine after the mixing, proportional by 300～400 gram/tons adds flotation agent lipid acid, and press 40-50 gram/ton adding pore forming material pine tar, and carry out the flotation second time, obtain CaCO ₃Rough concentrate, again through wash, filter, dry CaCO ₃Finished product, grade can reach more than 90%.

Claims

1. the integrated conduct method of a phosphorite tailings sand, it is characterized in that: at first CHARACTERISTICS OF TAILINGS SAND is sieved, the particle of particle diameter 〉=0.2mm is sent into masher, the masher pulp density is 60～70%, be milled to 100 order all-pass mistakes, send into tempering tank with the breeze that screening is come out, tempering tank pH value is transferred at 9-10, with the solution of water glass furnishing 8-10%,, behind uniform mixing, send into flotation machine by the proportional adding tempering tank of 350～400 gram/ton CHARACTERISTICS OF TAILINGS SAND, regulating the flotation machine pulp density is 50～60%, maintenance pH is 9-10, earlier flotation agent oleic acid is carried out ultrasonic emulsification, and the proportional that the oleic acid after emulsification is pressed 230-260 gram/ton CHARACTERISTICS OF TAILINGS SAND adds flotation machine, 20～30 ℃ of flotation temperatures, again by the proportional adding pore forming material pine tar of 40～60 gram/ton CHARACTERISTICS OF TAILINGS SAND, carry out the flotation first time in addition, obtain MgCO ₃Rough concentrate, again through wash, filter, dry MgCO ₃Finished product;

2. the integrated conduct method of phosphorite tailings sand according to claim 1 is characterized in that: the MgCO that flotation obtains through the first time ₃Rough concentrate is sent into atomizer mill again, being milled to 200 follows with one's eyes into tempering tank, regulate pulp density 30～50%, the pH value is 9-10, according to the solids content in the ore pulp, the water glass solution that adds 8-10% by the proportional of 500 gram/tons, behind the uniform mixing, send into flotation machine, regulate pulp density 30～50% in the flotation machine, the pH value is 9-10, the proportional of oleic acid after the emulsification by 300～350 gram/tons added, proportional by 40～50 gram/tons adds the pore forming material pine tar again, carries out the flotation of elaboration ore deposit again, gets elaboration ore deposit MgCO ₃, again through wash, filter, dry MgCO ₃Finished product.