CN104140110B

CN104140110B - Loess after acidifying

Info

Publication number: CN104140110B
Application number: CN201410358770.3A
Authority: CN
Inventors: 王跃皓; 王鲁海; 邱茗; 管永祥; 金白云; 许庆华; 蒋文兰; 许盛英
Original assignee: GANSU HUACHEN NONMETALLIC APPLIED SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: GANSU HUACHEN NONMETALLIC APPLIED SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2014-07-27
Filing date: 2014-07-27
Publication date: 2015-12-02
Anticipated expiration: 2034-07-27
Also published as: CN104140110A

Abstract

The invention discloses the loess after a kind of acidifying, the main points of its technical scheme are, the loess batching after acidifying is made up of loess, attapulgite clay, magnesium oxide, sulfuric acid, quick dissolved sodium silicate, polyvinyl alcohol, Vltra tears and sodium carbonate; By abrasive dust in the loess batching input grinding machine after acidifying, the meal after abrasive dust is the loess after acidifying.The production method of the loess after acidifying can avoid sulfuric acid and quick dissolved sodium silicate, polyvinyl alcohol, Vltra tears and sodium carbonate generation chemical reaction; After the acidified process of loess, pH value controls 5.5 ~ 7.5, can improve the utilization ratio of loess, not only can bring good economic benefit, environmental benefit and social benefit, and can realize turning waste into wealth.Loess after acidifying has good adsorptivity, thixotropy, thermostability, plasticity-and close-burning feature.Loess after acidifying is applicable to produce environment-friendly materials, Landscape Material, material of construction, whipping agent and fire product.

Description

Loess after acidifying

Technical field

The present invention relates to acidification, be specifically related to the loess after a kind of acidifying.

Background technology

Loess is the special type soil formed under arid climatic conditions, is generally pale yellow, sallow or tawny, has visual visible macropore and vertical joints.It is generally acknowledged now and mainly deposited by wind, be often calcareous and often containing shell, bone and mammiferous tooth and calcium carbonate nucleation, sometimes also contains ferric oxide tuberculosis and formed can the high-quality soil of water storage in a large number.

The mineralogical composition of loess has detrital mineral, clay mineral and authigenic mineral 3 class.Detrital mineral is quartz, feldspar and mica mainly, and account for 80% of detrital mineral, next has pyroxene, hornblende, pistacite, chlorite, magnetite etc.; In addition, in loess, carbonate minerals content is more, mainly calcite.Clay mineral mainly illite, montmorillonite, kaolinite, pyrrhosiderite, containing turgite etc.

Loess is a kind of very fertile soil layer, very important to agriculture production.But vegetation is rare, soil erosion, all causes serious harm to agriculture production and engineering construction, need science to administer.

In order to improve the application quality of loess, need to carry out acidification to loess.

Summary of the invention

The object of the invention is to overcome weak point in prior art, the loess after a kind of acidifying is provided.

Loess batching after acidifying is made up of loess, attapulgite clay, magnesium oxide, sulfuric acid, quick dissolved sodium silicate, polyvinyl alcohol, Vltra tears and sodium carbonate.

The production method of the loess after acidifying: by abrasive dust in the loess batching input grinding machine after acidifying, the meal after abrasive dust is the loess after acidifying.

Because loess is mainly made up of minimum powdered granule, and under drying, semiarid weather condition, they combine very not tight each other, as long as generally with the naked eye just can see between particle, there is of all sizes and variform hole and hole, so usually loess is called macroporous soil.It is generally acknowledged that the porousness of loess is rotted relevant to effect of loess etc. with water with Diagn, root system of plant, the more important thing is relevant with special weather condition, typical loess porosity is higher, and the porosity of Loessial rock is lower, the present invention selects the loess after pulverizing, particle fineness≤5 millimeter of loess.

Attapulgite clay has unique layer chain-like structure feature, and crystal is needle-like, threadiness or fiber collection shape.Attapulgite clay has unique dispersion, high temperature resistant, anti-good colloidal property and the higher adsorptive power such as saline and alkaline, and has certain plasticity-and cohesive force, and the present invention selects particle fineness≤5 millimeter of attapulgite clay.

Magnesium oxide has the general character of basic oxide, belongs to gelling material, can improve the colloidal property of loess.

Sulfuric acid select concentration be 98% the vitriol oil.

Quick dissolved sodium silicate is white powder material, can rapid solution in water, have that cohesive force is strong, intensity is higher, acid resistance, good heat resistance, the feature of alkali resistance and poor water resistance.

Polyethenol series white solid, external form divide cotton-shaped, particulate state, Powdered three kinds; Nonpoisonous and tasteless, particulate state can be dissolved in 80--90 DEG C of water, pulverous other powders pre-dispersed after can dissolve at normal temperatures.There is good viscosity, polymerizability, cohesiveness and water-retentivity.

Vltra tears has thickening capabilities, salt discharge, pH stability, water-retentivity, dimensional stability, excellent film-forming properties and the feature such as resistance to enzymatic, dispersiveness and cohesiveness widely.

Sodium carbonate has the general character and the thermostability of salt, soluble in water, and its aqueous solution is alkalescence, in the present invention for adjusting the loess pH value after acidifying.

The present invention is achieved by following technical proposals:

1, the loess batching after acidifying is made up of following component by weight percentage: the loess work in-process 90 ~ 98% after acidifying, quick dissolved sodium silicate 0.1 ~ 5%, polyvinyl alcohol 0.1 ~ 5%, Vltra tears 0.01 ~ 3% and sodium carbonate 0 ~ 3%.

The production method of the loess 2, after acidifying: by abrasive dust in the loess batching input grinding machine after acidifying, particle fineness≤0.074 millimeter, the meal after abrasive dust is the loess finished product after acidifying.

3, the half-finished production method of the loess after acidifying: stir in the stirrer (1) input of the batching of loess mixture operated, then dilute sulphuric acid is slowly added in loess mixture carry out acidification; (2), by the loess mixture after acidification, be loess flap by twin rollers extruding, thickness≤3 millimeter of loess flap; (3) loess flap is transported to roasting in rotary type stoving oven, roasting time is 1 ~ 3 hour, and maturing temperature controls at 300 ~ 400 DEG C, loess flap water content≤2% after roasting, loess flap after roasting is the loess work in-process after acidifying, and PCm is weight percentage.

4, the batching of loess flap is made up of following component by weight percentage: loess mixture 75 ~ 95% and dilute sulphuric acid 5 ~ 25%.

5, the batching of loess mixture is made up of following component by weight percentage: loess 68 ~ 92%, attapulgite clay 5 ~ 30% and magnesium oxide 0.1 ~ 3%.

6, the batching of dilute sulphuric acid is made up of following component by weight percentage: concentration is the vitriol oil 1 ~ 25% and the water 75 ~ 99% of 98%, concentration be 98% vitriol oil per-cent be weight percentage.

The production method of the loess after acidifying takes first acidifying to carry out compounding ingredient again, sulfuric acid and quick dissolved sodium silicate, polyvinyl alcohol, Vltra tears and sodium carbonate generation chemical reaction can be avoided, give full play to raw-material respective characteristic in batching, and obtain complementation, guarantee the loess inner quality after acidifying.

According to the needs of quality product, adopt the loess pH value after sodium carbonate adjustment acidifying, method is simple.

After the acidified process of loess, pH value controls 5.5 ~ 7.5, can improve the utilization ratio of loess, not only can bring good economic benefit, environmental benefit and social benefit, and can realize turning waste into wealth.

Loess after acidifying has good adsorptivity, thixotropy, thermostability, plasticity-and close-burning feature.

Loess after acidifying is applicable to produce environment-friendly materials, Landscape Material, material of construction, whipping agent and fire product.

Embodiment

Below in conjunction with embodiment, the invention will be further described:

1, the loess batching after acidifying is made up of following component by weight percentage: the loess work in-process 96.5% after acidifying, quick dissolved sodium silicate 1.5%, polyvinyl alcohol 1.4%, Vltra tears 0.58% and sodium carbonate 0.02%.

3, the half-finished production method of the loess after acidifying: stir in the stirrer (1) input of the batching of loess mixture operated, then dilute sulphuric acid is slowly added in loess mixture carry out acidification; (2), by the loess mixture after acidification, be loess flap by twin rollers extruding, thickness≤3 millimeter of loess flap; (3) loess flap is transported to roasting in rotary type stoving oven, roasting time is 2 hours, and maturing temperature controls at 300 ~ 350 DEG C, loess flap water content≤2% after roasting, and the loess flap after roasting is the loess work in-process after acidifying.

4, the batching of loess flap is made up of following component by weight percentage: loess mixture 78% and dilute sulphuric acid 22%.

5, the batching of loess mixture is made up of following component by weight percentage: loess 84%, attapulgite clay 14% and magnesium oxide 2%.

6, the batching of dilute sulphuric acid is made up of following component by weight percentage: concentration is the vitriol oil 4% and the water 96% of 98%.

Claims

1. the loess after an acidifying, it is characterized in that, the loess batching after acidifying is made up of following component by weight percentage: the loess work in-process 90 ~ 98% after acidifying, quick dissolved sodium silicate 0.1 ~ 5%, polyvinyl alcohol 0.1 ~ 5%, Vltra tears 0.01 ~ 3% and sodium carbonate 0 ~ 3%;

The half-finished production method of loess after described acidifying: stir in the stirrer (1) input of the batching of loess mixture operated, then dilute sulphuric acid is slowly added in loess mixture carry out acidification; (2), by the loess mixture after acidification, be loess flap by twin rollers extruding, thickness≤3 millimeter of loess flap; (3) loess flap is transported to roasting in rotary type stoving oven, roasting time is 1 ~ 3 hour, and maturing temperature controls at 300 ~ 400 DEG C, loess flap water content≤2% after roasting, and the loess flap after roasting is the loess work in-process after acidifying;

The batching of loess flap is made up of following component by weight percentage: loess mixture 75 ~ 95% and dilute sulphuric acid 5 ~ 25%; The batching of loess mixture is made up of following component by weight percentage: loess 68 ~ 92%, attapulgite clay 5 ~ 30% and magnesium oxide 0.1 ~ 3%; The batching of dilute sulphuric acid is made up of following component by weight percentage: concentration is the vitriol oil 1 ~ 25% and the water 75 ~ 99% of 98%; Select particle fineness≤5 millimeter of loess, particle fineness≤5 millimeter of attapulgite clay.

2. the loess after acidifying according to claim 1, is characterized in that, the production method of the loess after acidifying: by abrasive dust in the loess batching input grinding machine after acidifying, particle fineness≤0.074 millimeter, the meal after abrasive dust is the loess finished product after acidifying.