CN111892427A

CN111892427A - Production process of silicon-calcium-potassium fertilizer

Info

Publication number: CN111892427A
Application number: CN202010558015.5A
Authority: CN
Inventors: 秦胜君
Original assignee: Zhongsheng Yimin Ecological Technology Co ltd
Current assignee: Zhongsheng Yimin Ecological Technology Co ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2020-11-06

Abstract

The invention discloses a process for producing silicon-calcium-potassium fertilizer, which uses red mud, potassium feldspar and dolomite as raw materials and coke as fuel to produce the silicon-calcium-potassium fertilizer, wherein the main components of the fertilizer are effective silicon, calcium, potassium, aluminum, magnesium and the like, and the fertilizer contains SiO2, CaO, K2O, Ai2O3, MgO and the like, and the silicon-calcium-potassium fertilizer is an aluminosilicate sphere containing potassium, is alkalescent and is a citrate soluble fertilizer, has slow fertilizer effect but long fertilizer effect, is beneficial to improving soil structure and improving soil aluminum-silicon ratio, is used for agricultural production and is easy to be absorbed by plants. The red mud is used as a raw material to produce the silicon-calcium-potassium fertilizer, the quality meets the requirement of fertilizer seeds, resources are added for the steel industry, the waste is recycled, the environmental pollution is reduced, the land occupation area is reduced, the red mud conforms to the national policy, the country and the people are benefited, and the social benefit is greater than the economic benefit.

Description

Production process of silicon-calcium-potassium fertilizer

Technical Field

The invention relates to the field of production of silicon-calcium-potassium fertilizer, in particular to a production process of silicon-calcium-potassium fertilizer.

Background

Since alumina factories in China are built, red mud is waste and is accumulated like a mountain, and in recent years, a small amount of bricks are used for making bricks, paving roadbed, filling and the like.

New technologies are yet to be developed and utilized. Taking red mud components of a certain factory as an example: the average alumina content is 19.13%, the silica content is 14.32%, the ferric oxide content is 28.78%, the titanium dioxide content is 4.23%, the calcium oxide content is 16%, and the sodium oxide content is 5.5%.

Disclosure of Invention

The invention aims to solve the problems and provide a production process of a silicon-calcium-potassium fertilizer, wherein the silicon-calcium-potassium fertilizer is a potassium-containing aluminosilicate sphere which is a slightly alkaline and citrate-soluble fertilizer, has slow fertilizer efficiency but long fertilizer efficiency, is beneficial to improving soil structure and increasing soil aluminum-silicon ratio, is used for agricultural production, and is easy to be absorbed by plants. The red mud is used as a raw material to produce the silicon-calcium-potassium fertilizer, the quality meets the requirement of fertilizer seeds, resources are added for the steel industry, the waste is recycled, the environmental pollution is reduced, the land occupation area is reduced, the red mud conforms to the national policy, the country and the people are benefited, and the social benefit is greater than the economic benefit. The whole set of equipment is made by domestic and self-designed non-standard manufacture, and has the advantages of simple process, mature technology, easy holding, low investment, high yield, quick response and stable product quality.

The technical scheme provided by the invention is as follows: a production process of a silicon-calcium-potassium fertilizer comprises the following steps: step 1): red mud (waste of an alumina plant), potassium feldspar and dolomite are used as raw materials, coke is used as fuel, the red mud and potassium feldspar powder are pressed into 5 centimeter balls and dried for later use, other ores are respectively crushed into coke with the particle size of 3-8 Cm and ore with the particle size of 4-14 Cm, and the coke and the potassium feldspar powder are respectively stored in each storage bin for later use; step 2): the materials are measured by an electronic scale feeder, are sent to a hopper through a belt conveyor and are put into a blast furnace; step 3): the method comprises the steps of adopting a blast furnace or an electric furnace of a chemical production process for continuous production, reacting all mineral elements in high-temperature melting, carrying out exchange recombination and activation on molecules, reducing ferric oxide in red mud and metal oxides in minerals into metal by carbon monoxide gas, condensing together, separating redundant heavy metal, settling in a bath pool, accumulating to a certain amount, and then discharging once at fixed time to obtain a pig iron byproduct; step 4): the synthesized silicon-calcium-potassium fertilizer flows out from a discharge port and is quenched by high-pressure water into sponge body particles and cotton shape, the semi-finished products after two times of activation flow into a sedimentation tank along with water flow for sedimentation, the semi-finished products are fished out by a grab bucket for stacking, the semi-finished products produced in each shift are sampled and tested, and the production is guided according to test reports; step 5): and naturally filtering the semi-finished product to remove water, drying in a dryer, grinding into powder of 100 meshes by a ball mill, removing a small amount of metal residues by magnetic separation, metering, packaging and warehousing to obtain the silicon-calcium-potassium fertilizer product.

The invention has the beneficial effects that: the invention has the advantages of reasonable and simple structure, low production cost, convenient installation and complete functions, and the silicon-calcium-potassium fertilizer is a potassium-containing aluminosilicate sphere which is a slightly alkaline and citrate-soluble fertilizer, has slow fertilizer efficiency but long fertilizer efficiency, is beneficial to improving soil structure and increasing soil aluminum-silicon ratio, is used for agricultural production, and is easy to be absorbed by plants. The red mud is used as a raw material to produce the silicon-calcium-potassium fertilizer, the quality meets the requirement of fertilizer seeds, resources are added for the steel industry, the waste is recycled, the environmental pollution is reduced, the land occupation area is reduced, the red mud conforms to the national policy, the country and the people are benefited, and the social benefit is greater than the economic benefit. The whole set of equipment is made by domestic and self-designed non-standard manufacture, and has the advantages of simple process, mature technology, easy holding, low investment, high yield, quick response and stable product quality.

Drawings

For ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.

FIG. 1 is a schematic view of the production process of the present invention.

Detailed Description

As shown in fig. 1, the following technical solutions are adopted in the present embodiment: a production process of a silicon-calcium-potassium fertilizer comprises the following steps: step 1): red mud (waste of an alumina plant), potassium feldspar and dolomite are used as raw materials, coke is used as fuel, the red mud and potassium feldspar powder are pressed into 5 centimeter balls and dried for later use, other ores are respectively crushed into coke with the particle size of 3-8 Cm and ore with the particle size of 4-14 Cm, and the coke and the potassium feldspar powder are respectively stored in each storage bin for later use; step 2): the materials are measured by an electronic scale feeder, are sent to a hopper through a belt conveyor and are put into a blast furnace; step 3): the method comprises the steps of adopting a blast furnace or an electric furnace of a chemical production process for continuous production, reacting all mineral elements in high-temperature melting, carrying out exchange recombination and activation on molecules, reducing ferric oxide in red mud and metal oxides in minerals into metal by carbon monoxide gas, condensing together, separating redundant heavy metal, settling in a bath pool, accumulating to a certain amount, and then discharging once at fixed time to obtain a pig iron byproduct; step 4): the synthesized silicon-calcium-potassium fertilizer flows out from a discharge port and is quenched by high-pressure water into sponge body particles and cotton shape, the semi-finished products after two times of activation flow into a sedimentation tank along with water flow for sedimentation, the semi-finished products are fished out by a grab bucket for stacking, the semi-finished products produced in each shift are sampled and tested, and the production is guided according to test reports; step 5): and naturally filtering the semi-finished product to remove water, drying in a dryer, grinding into powder of 100 meshes by a ball mill, removing a small amount of metal residues by magnetic separation, metering, packaging and warehousing to obtain the silicon-calcium-potassium fertilizer product.

The using state of the invention is as follows: the process selects red mud, potassium feldspar and dolomite as raw materials, coke is used as fuel, the red mud, potassium feldspar powder and binder are uniformly stirred and then pressed into 5 Cm balls for drying for later use, and other ores with the specification of the grain sizes of 3Cm-8Cm coke and 4Cm-8Cm ore are respectively crushed into the coke and the ore and are respectively stored in each storage bin for later use; chemical element formula is utilized, the chemical element formula is measured by an electronic scale feeder, and the chemical element formula is conveyed to a hopper through a belt conveyor and then is lifted by the hopper to be thrown into the blast furnace; the production of the silicon-calcium-potassium fertilizer is guided according to the newly established enterprise standard, the limit of harmful elements such as lead, arsenic, mercury, cadmium and chromium is executed in national standard GB/T23349-2009, the mineral element content of various ores is firstly assayed, the required amount and proportion of each ore are calculated, and the coke feed ratio accounts for 20% -22%.

In a blast furnace or an electric furnace, mineral substances are subjected to high-temperature melting reaction at 1500-1700 ℃, molecules are subjected to exchange recombination activation to generate a new substance molecular structure, ferric oxide is reduced into iron by CO and gathered together, and the iron oxide quickly sinks into a bath pool to accumulate a certain amount due to large specific gravity and is discharged once at fixed time to become pig iron; the synthetic silicon-calcium-potassium fertilizer flows out from a discharge port and is quenched by high-pressure water into sponge body particles and cotton shape, the semi-finished products after twice activation flow into a sedimentation tank along with water flow for sedimentation, are fished out by a grab bucket for stacking, are sent into a dryer for drying after naturally filtering water, are ground into 100 meshes of powder by a ball mill, then are subjected to magnetic separation to remove a small amount of metal residues, and are metered, packaged and warehoused (silicon-calcium-potassium fertilizer products); the production process flow comprises the following supporting facilities of crushing, screening, material preparation, grinding, stirring, ball pressing, metering and conveying, air preheating, water storage in a water storage tank for later use, a high-pressure fan, a high-pressure water pump, electric power matching, a non-standard hot blast stove, a blast furnace, a cyclone dust collector, a cloth bag dust collector, a Venturi washing tower, a cooling water tank, a sedimentation water tank, a crane grab bucket, belt conveying, a roller dryer, a ball mill, a heat-resistant strong magnetic separator, a packaging machine, a laboratory and the like. When the material is fed and ignited for production, the smoke dust generated by the blast furnace is dedusted and recycled by the cyclone dust collector, the gas is washed by the Venturi washing tower, carbon monoxide is sent to the dryer and the hot blast stove through the pipeline to heat the carbon dioxide after cold air, the carbon dioxide is washed by a two-alkali method to remove nitrogen and sulfur, and then the carbon dioxide passes through the high-altitude chimney, and is subjected to online detection and standard emission. The cold air is heated to above 600 ℃ in the hot blast stove, and is blown into the blast furnace for combustion supporting through a high pressure fan, the furnace temperature in the blast furnace is maintained at 1500-1700 ℃, the normal production is ensured, the carbon monoxide is conveyed to the dryer through a pipeline, and the semi-finished silicon-calcium-potassium fertilizer is burned and dried in the dryer, the whole production process flow is continuous for 24 hours, no solid waste is discharged, and the water is recycled. The whole set of equipment is made by domestic and self-designed non-standard manufacture, and has the advantages of simple process, mature technology, easy holding, low investment, high yield, quick response and stable product quality.

While there have been shown and described what are at present considered to be the fundamental principles of the invention and its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims

1. The production process of the silicon-calcium-potassium fertilizer is characterized by comprising the following steps of:

step 1): red mud (waste of an alumina plant), potassium feldspar and dolomite are used as raw materials, coke is used as fuel, the red mud and potassium feldspar powder are pressed into 5 centimeter balls and dried for later use, other ores are respectively crushed into coke with the particle size of 3-8 Cm and ore with the particle size of 4-14 Cm, and the coke and the potassium feldspar powder are respectively stored in each storage bin for later use;

step 2): the materials are measured by an electronic scale feeder, are sent to a hopper through a belt conveyor and are put into a blast furnace;

step 3): the method comprises the steps of adopting a blast furnace or an electric furnace of a chemical production process for continuous production, reacting all mineral elements in high-temperature melting, carrying out exchange recombination and activation on molecules, reducing ferric oxide in red mud and metal oxides in minerals into metal by carbon monoxide gas, condensing together, separating redundant heavy metal, settling in a bath pool, accumulating to a certain amount, and then discharging once at fixed time to obtain a pig iron byproduct;

step 4): the synthesized silicon-calcium-potassium fertilizer flows out from a discharge port and is quenched by high-pressure water into sponge body particles and cotton shape, the semi-finished products after two times of activation flow into a sedimentation tank along with water flow for sedimentation, the semi-finished products are fished out by a grab bucket for stacking, the semi-finished products produced in each shift are sampled and tested, and the production is guided according to test reports;

step 5): and naturally filtering the semi-finished product to remove water, drying in a dryer, grinding into powder of 100 meshes by a ball mill, removing a small amount of metal residues by magnetic separation, metering, packaging and warehousing to obtain the silicon-calcium-potassium fertilizer product.