CN-122010430-A - Preparation method of sulfate-resistant lithium slag-based cementing material and detoxification treatment device

CN122010430ACN 122010430 ACN122010430 ACN 122010430ACN-122010430-A

Abstract

The invention provides a preparation method of an anti-sulfate lithium slag-based cementing material and a detoxification treatment device. The preparation method is characterized by comprising the following steps of S1, directly adding deionized water according to a liquid-solid ratio of 1:2-1:3, adding Na2S according to a mass ratio of 0.05-0.1% of the lithium slag, stirring in a reaction kettle for 1h at normal temperature, and carrying out plate-frame filter pressing and solid-liquid separation to obtain detoxified and preactivated lithium slag, wherein lithium smelting slag does not need to be dried. According to the preparation method and the detoxification treatment device of the sulfate-resistant lithium slag-based cementing material, provided by the invention, through detoxification and activation integrated treatment of the lithium slag, the use safety and activity of the lithium slag are ensured, meanwhile, the sulfate-resistant performance of the lithium slag-based cementing material is remarkable, the problems of safety, scale and high-value utilization of lithium smelting slag puzzling the industry for many years are fundamentally solved, and a support is provided for the green development of the lithium ore lithium extraction industry.

Inventors

Bai Te
WEI ZIJIE
YAO LI
WEI DONGDONG
PAN RUI
LV TING
CHEN KAI
SHUAI YONG

Assignees

丰城九岭锂业有限公司

Dates

Publication Date: 20260512
Application Date: 20260212

Claims (10)

1. The preparation method of the sulfate-resistant lithium slag-based cementing material is characterized by comprising the following steps of: s1, directly adding deionized water according to the liquid-solid ratio of 1:2-1:3 without drying lithium smelting slag, and adding according to the mass ratio of 0.05-0.1% of the mass of the lithium slag Stirring for 1h at normal temperature in a reaction kettle, and performing plate-frame filter pressing and solid-liquid separation to obtain detoxified and preactivated lithium slag; S2, drying the lithium slag, the blast furnace granulated slag and the silicate clinker until the water content is less than 0.5%, and grinding to form a granularity grading; And S3, fully mixing and completely homogenizing the ground lithium slag powder, clinker powder, fly ash, gypsum, slaked lime and aluminum-based additive according to a certain proportion to obtain the lithium slag-based sulfate-resistant cementing material.
2. The method for preparing the sulfate-resistant lithium slag-based cementing material according to claim 1, wherein in the step S3, the mixture ratio of the raw materials in the lithium slag-based sulfate-resistant cementing material is 20% -40% of lithium slag powder, 25% -45% of slag powder, 5% -15% of clinker powder, 1% -8% of fly ash, 5% -10% of gypsum, 5% -10% of slaked lime and 0.1% -3% of aluminum additive.
3. The method for preparing sulfate-resistant lithium slag-based cementing material according to claim 1, wherein in S1, toxic elements such as fluorine, beryllium, thallium and the like in the lithium slag can be subjected to detoxification treatment to greatly reduce toxicity, and The solution is alkaline, al-O bonds can be opened in the detoxification process of the lithium slag, and the hydration activity of the lithium slag is improved, and in the S2, the specific surface area of the lithium slag is ground to 500-700m 2 /kg, the specific surface area of the blast furnace granulated slag is ground to 600-800m 2 /kg, and the specific surface area of the silicate clinker is ground to 300-500m 2 /kg.
4. A detoxification treatment device, which is characterized by comprising a reaction kettle, wherein the top of the reaction kettle is communicated with a feed inlet, and the bottom of the reaction kettle is communicated with a drain pipe; The spiral feeding mechanism is communicated with the top of the reaction kettle and comprises a spiral feeding box and a discharge hopper, the discharge hopper is communicated with the top of the reaction kettle, the spiral feeding box is arranged on the ground through a support, two spiral feeders are rotatably arranged on the inner wall of the spiral feeding box, two spiral feeders are adaptively arranged, extension shafts are fixedly arranged at one ends of the two spiral feeders, one ends of the two extension shafts penetrate through the inner wall of the spiral feeding box and extend to the outside, the two extension shafts are connected through belt transmission, one end of one extension shaft is fixedly connected with a feeding motor, the feeding motor is fixedly arranged on one side of the spiral feeding box through a support plate, the top of the spiral feeding box is communicated with the feed hopper, and the bottom of the spiral feeding box is communicated with the top of the reaction kettle through the discharge hopper; and the deionized water mechanism is used for supplying deionized water to the reaction kettle.
5. The detoxification processing apparatus according to claim 4, wherein the deionized water mechanism is connected to the top of the reaction kettle, the deionized water mechanism comprises a deionized water pipe and a deionized water tank, the deionized water pipe is connected to the top of the reaction kettle, the deionized water tank is disposed on the ground, a deionized water pump is fixedly installed on the top of the deionized water tank, the tail end of the deionized water pipe is connected to the water outlet end of the deionized water pump, and the water pumping end of the deionized water pump is connected to the inside of the deionized water tank through a water pumping pipe.
6. The detoxification treatment device according to claim 4, wherein the drainage pipe has a pumping mechanism connected to the end thereof, the pumping mechanism comprises a pumping pipe, one end of the pumping pipe is connected to the end of the drainage pipe, the other end of the pumping pipe is connected to a pumping pump, the pumping pump is disposed on the ground, and the output end of the pumping pump is connected to a connecting pipe.
7. The detoxification treatment device according to claim 6, wherein the top end of the connecting pipe is communicated with a plate-and-frame filter press, a lithium slag box is arranged at the bottom of the plate-and-frame filter press, a waste liquid box is arranged at the water outlet end of the plate-and-frame filter press, and the lithium slag box and the waste liquid box are both arranged on the ground.
8. The detoxification processing apparatus according to claim 4, wherein the stirring mechanism is fixedly mounted on the top of the inner wall of the reaction kettle, the stirring mechanism comprises a stirring motor fixedly mounted on the top of the inner wall of the reaction kettle, an output shaft of the stirring motor is fixedly connected with a stirring shaft, and a plurality of stirring blades are fixedly mounted on the surface of the stirring shaft through a fixing ring.
9. The detoxification processing apparatus according to claim 8, wherein an electromagnet controller is fixedly installed on the surface of the output shaft of the stirring motor, the outer wall of the electromagnet controller is fixedly installed on the inner wall of the reaction kettle through four magnetic strips, four side wall scrapers are fixedly installed at one ends of a plurality of stirring blades respectively, and the four side wall scrapers are installed in a matching manner with the inner wall of the reaction kettle.
10. The detoxification processing device according to claim 9, wherein each two magnetic strips are provided with four scraper mechanisms, each scraper mechanism comprises a first magnetic plate and a second magnetic plate, the first magnetic plates and the second magnetic plates are respectively attracted with the two magnetic strips, a first scraper is fixedly arranged at the bottom of each first magnetic plate, a second scraper is fixedly connected to one side of each first scraper through a connecting plate, a floating ball is fixedly arranged at the top of each second scraper and the bottom of each second magnetic plate through a supporting column, and the first scraper and the second scraper are installed in a matched mode with each stirring blade.

Description

Preparation method of sulfate-resistant lithium slag-based cementing material and detoxification treatment device Technical Field The invention relates to the field of marine cement, in particular to a preparation method of an anti-sulfate lithium slag-based cementing material and a detoxification treatment device. Background The lithium carbonate is used as a core raw material of a power battery and an energy storage battery, the green stable supply of the lithium carbonate becomes a key proposition for sustainable development of industry, however, the external dependence of lithium resources in China is higher than 60% for a long time, and the lithium mica is used as a characteristic resource accounting for 40% of national lithium oxide reserves, so that the lithium carbonate becomes a strategic base stone for guaranteeing the safety of lithium industry chains in China. The conventional lepidolite can generate a large amount of lithium slag in the traditional lithium extraction process, so that the problem of serious solid waste digestion is faced, the problem of ore grade limitation is solved, 30-50 tons of lithium slag is generated along with each ton of lithium carbonate production, tens of millions of tons of lepidolite smelting slag can be generated each year, the serious bottleneck for restricting the sustainable development of the national lithium battery industry is formed, and a large amount of solid waste cannot be recycled during the lithium smelting slag, so that the problem of digestion of the lithium slag is solved. Therefore, it is necessary to provide a preparation method of sulfate-resistant lithium slag-based cementing material and a detoxification treatment device for solving the technical problems. Disclosure of Invention The invention provides a preparation method and a detoxification treatment device of an anti-sulfate lithium slag-based cementing material, which solve the problems that lithium smelting slag cannot be utilized in a high-value manner and lithium slag is difficult to dissolve. In order to solve the technical problems, the preparation method of the sulfate-resistant lithium slag-based cementing material provided by the invention comprises the following steps: s1, directly adding deionized water according to the liquid-solid ratio of 1:2-1:3 without drying lithium smelting slag, and adding according to the mass ratio of 0.05-0.1% of the mass of the lithium slag Stirring for 1h at normal temperature in a reaction kettle, and performing plate-frame filter pressing and solid-liquid separation to obtain detoxified and preactivated lithium slag; S2, drying the lithium slag, the blast furnace granulated slag and the silicate clinker until the water content is less than 0.5%, and grinding to form a granularity grading; And S3, fully mixing and completely homogenizing the ground lithium slag powder, clinker powder, fly ash, gypsum, slaked lime and aluminum-based additive according to a certain proportion to obtain the lithium slag-based sulfate-resistant cementing material. Preferably, in the S3, the proportion of the raw materials in the lithium slag-based anti-sulfate cementing material is 20-40% of lithium slag powder, 25-45% of slag powder, 5-15% of clinker powder, 1-8% of fly ash, 5-10% of gypsum, 5-10% of slaked lime and 0.1-3% of aluminum additive. Preferably, in the S1, toxic elements such as fluorine, beryllium, thallium and the like in the lithium slag can greatly reduce toxicity after detoxification treatment, andThe solution is alkaline, al-O bonds can be opened in the detoxification process of the lithium slag, and the hydration activity of the lithium slag is improved, and in the S2, the specific surface area of the lithium slag is ground to 500-700m 2/kg, the specific surface area of the blast furnace granulated slag is ground to 600-800m 2/kg, and the specific surface area of the silicate clinker is ground to 300-500m 2/kg. The detoxification treatment device comprises a reaction kettle, wherein the top of the reaction kettle is communicated with a feed inlet, and the bottom of the reaction kettle is communicated with a drain pipe; The spiral feeding mechanism is communicated with the top of the reaction kettle and comprises a spiral feeding box and a discharge hopper, the discharge hopper is communicated with the top of the reaction kettle, the spiral feeding box is arranged on the ground through a support, two spiral feeders are rotatably arranged on the inner wall of the spiral feeding box, two spiral feeders are adaptively arranged, extension shafts are fixedly arranged at one ends of the two spiral feeders, one ends of the two extension shafts penetrate through the inner wall of the spiral feeding box and extend to the outside, the two extension shafts are connected through belt transmission, one end of one extension shaft is fixedly connected with a feeding motor, the feeding motor is fixedly arranged on one side of the spiral feeding box through a support