CN1403206A - Mineral-floating foaming agent and its prepn - Google Patents

Abstract

The present invention proposes one kind of mineral-floating foaming agent and its preparation. The foaming agent contains alcohol with branch chain and epoxy ethane and/or epoxy propane in the weight ratio of 1 to 1-6, and the alcohol with branched chain may be isopropyl alcohol, isobutyl alcohol or isoamyl alcohol. It is prepared through mixing alcohol with branched chain and epoxy ethane and/or epoxy propane, adding oxide of K or Na in 0.3-1% of material weight as catalyst, reaction at 0.01-1.2 MPa pressure and 170-190 deg.c temperature for 2-3 hr, decreasing the pressure to nomral pressure, cooling to below 50 deg.c and filtering. The foaming agent is water soluble, good in dispersivity, great in formed foam, favorable to secondary enrichment and recovery of fine mineral and has no environmental pollution.

Description

A kind of mineral flotation foaming agent and preparation thereof

Technical field

The present invention relates to foaming agent and technology of preparing thereof that mineral floating is used.

Background technology

For valuable mineral is effectively separated with gangue mineral, in flotation technology, usually to use foaming agent to produce a large amount of foams, form a large amount of liquid gas interfaces.When useful mineral are enriched in liquid gas interface come-up and separate with gangue, be referred to as flotation., gangue mineral floats the floating reverse flotation that then is called of valuable mineral when being enriched in liquid gas interface.

Flotation all has the requirement of comparison strictness to the size of foam, crisp toughness, intensity, is not as long as bubbled.Generally speaking, the coarse grain flotation needs bulla, and fine particles flotation then needs microvesicle.Crisp toughness is also wanted appropriateness, and foam is too crisp, and then easily cracked, mineral do not float, and the too tough froth breaking that then is difficult to of foam can not form the secondary enrichment, and separating effect is also bad.

The character that foaming agent should have: 1, the molecular structure of foaming agent is the organic matter of heteropolarity, and an end is polar group, the hydrophilic liquid phase that enters, and the other end is a nonpolar group, and close gas enters gas phase, the foaming agent molecule is produced on gas-liquid interface align.2, foaming agent is a surfactant, can reduce the surface tension of water.

From development of history, in floatation process, the notice of foaming agent be can not show a candle to collecting agent, be limited to China before chemical industry flourishing inadequately, many industrial chemicals all are in short state, so artificial synthetic foaming agent kind is seldom.Use the terpene compound that from pine tar, refines---terpinol always.There are many defectives in the terpinol foaming agent, as when the cation reverse flotation of the high cupric oxide flotation of clay content and some oxide ores, the foam viscosity that produces owing to it is difficult to froth breaking greatly, cause running groove, what influence was produced normally carries out, and also the phase strain is big for its consumption, and the terpinol smell is very big simultaneously, influences health.With the terpinol of tailings discharging, biological degradability is poor, and aquatic organism and environment are all had pollution.From the floatation process characteristics, the inclined to one side medium size of foam that terpinol produces, microvesicle is less, is unfavorable for adhering to of particulate ore deposit, and the particulate rate of recovery is low.

In recent years, also adopting some chemical industry accessory substances, mostly is some mixtures, therefore class material composition instability usually, and the frothing capacity fluctuation is big, aborning floatation indicators is also had adverse effect.

Along with the continuous development of chemical industry, the chemical raw material price is so not expensive, and supply is also filled very much

Continuous development along with chemical industry, the chemical raw material price is so not expensive, supply also very abundant, so according to the characteristics of floatation process syntheticly be suitable for that flotation requires, Stability Analysis of Structures, composition are certain, foaming characteristic and surface-active can satisfy the floating agent that floatation process requires and have very big economic implications.

Summary of the invention

The mineral flotation foaming agent that the objective of the invention is to utilize that homemade cheap industrial chemicals composite structure is stable, composition is certain, foaming characteristic and surface-active can satisfy the floatation process requirement provides the industrial process of this floatation frother simultaneously.

Be achieved through the following technical solutions purpose of the present invention:

A kind of mineral flotation foaming agent, it contains band branched-chain alcoho, oxirane or/and expoxy propane, and its band branched-chain alcoho and oxirane are or/and the weight ratio of expoxy propane=1: 1～6.

Above-mentioned band branched-chain alcoho is isopropyl alcohol, isobutanol, isoamyl alcohol.

Preparation method's step of floatation frother of the present invention is:

(1) will be with branched-chain alcoho, oxirane, expoxy propane ratio batching on request, and add the alkali metal K of material quantity gross weight 0.3%～1%, the oxide of Na is made catalyst,

(2) in autoclave, after reacting 2～3 hours under 0.01～1.2MPa pressure, 170～190 ℃ of temperature, be depressured to normal pressure, be cooled to＜50 ℃,

(3) cross the elimination catalyst and obtain liquid floatation foaming agent product.

This mineral flotation foaming agent has following characteristics:

1, soluble in water, good dispersion.

2, lather quickness is big, and foam number is big.

3, foam is tough crisp suitable, forms the secondary enrichment easily in floatation process.

4, the microvesicle of Chan Shenging is more, the recovery of favourable fine mineral and the recovery of noble metal.

5, consumption is few, generally is 2/3～1/2 of terpinol consumption.

6, free from extraneous odour, fragrant odour, biodegradability is good, can not pollute environment.

The specific embodiment

Further specify the synthetic and characteristics of mineral flotation foaming agent of the present invention below by embodiment:

Embodiment 1

Press isopropyl alcohol: the weight ratio batch mixes of expoxy propane=1: 1.1, the potassium oxide that adds material quantity gross weight 0.3% simultaneously, put into autoclave, at 0.5～1MPa pressure, 170～190 ℃ of thermotonuses are after 2.5 hours, be depressured to normal pressure, water is cooled to 50 ℃, crosses the elimination catalyst and obtains the floatation frother product.This product is applicable to the flotation that contains mud cupric oxide and copper sulfide mixing ore deposit.Be beneficial to the recovery of microfine gold and silver.

Embodiment 2

Press isobutanol: expoxy propane: the weight ratio batch mixes of oxirane=1: 1.5: 1.5, the sodium oxide molybdena that adds material quantity gross weight 0.6%, put into autoclave, in 0.1～1.1MPa pressure, 170～190 ℃ of thermotonuses are after 2.5 hours, with water cooling, be depressured to normal pressure, be cooled to 48 ℃ of temperature after, cross the elimination catalyst and obtain the floatation frother product.This product frothing capacity is good, and fragility is moderate, can be used for the flotation of general copper-sulphide ores.

Embodiment 3

Press isoamyl alcohol: oxirane=1: 5.5 the weight ratio batching and the sodium oxide molybdena of adding material quantity gross weight 0.4%, in autoclave, at 0.8～1MPa pressure, reaction is 2 hours under 170～190 ℃ of temperature, be cooled to then below 50 ℃, be depressured to normal pressure, cross the elimination catalyst and obtain the floatation frother product.The relative fragility of this product foaming characteristic is less, and viscosity is preferably arranged, and is suitable for the flotation of general sulphide ore.

Embodiment 4

The result such as the table 1 of floatation frother of the present invention and terpinol (No. 2 oil) flotation copper mine

Name of product	Copper grade %	Copper recovery %	Mog-200 order %	Dosing g/T
					????K1	????23.4	????87.88	???? 80	Xanthate 500
????X1	????0.47	????12.12	No. 2 oil 450
				????K2	????26.5	????88.21	???? 80		Xanthate 500
????X2	????0.41	????11.79	The foaming agent 150 of embodiment 1

From table data as can be seen, when foaming agent of the present invention and terpinol were all made the flotation agent of low-grade copper mine, copper recovery was close, and the consumption of flotation agent of the present invention is 1/3 of a terpinol consumption.

Claims (3)

1, a kind of mineral flotation foaming agent is characterized in that containing band branched-chain alcoho, oxirane or/and expoxy propane, and its band branched-chain alcoho and oxirane are or/and the weight ratio of expoxy propane=1: 1～6.

2, foaming agent as claimed in claim 1 is characterized in that described band branched-chain alcoho is isopropyl alcohol, isobutanol, isoamyl alcohol.

3, the preparation method of the described foaming agent of claim 1 is characterized in that step is:

(1) will be with branched-chain alcoho, oxirane, expoxy propane ratio batching on request, and add the alkali metal K of material quantity gross weight 0.3%～1%, the oxide of Na is made catalyst,

(2) in autoclave, after reacting 2～3 hours under 0.01～1.2MPa pressure, 170～190 ℃ of temperature, be depressured to normal pressure, be cooled to＜50 ℃,

(3) cross the elimination catalyst and obtain liquid floatation foaming agent product.